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Merge branches 'for-next/sysreg', 'for-next/sme', 'for-next/kselftest', 'for-next/misc', 'for-next/sme2', 'for-next/tpidr2', 'for-next/scs', 'for-next/compat-hwcap', 'for-next/ftrace', 'for-next/efi-boot-mmu-on', 'for-next/ptrauth' and 'for-next/pseudo-nmi', remote-tracking branch 'arm64/for-next/perf' into for-next/core

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* arm64/for-next/perf:
  perf: arm_spe: Print the version of SPE detected
  perf: arm_spe: Add support for SPEv1.2 inverted event filtering
  perf: Add perf_event_attr::config3
  drivers/perf: fsl_imx8_ddr_perf: Remove set-but-not-used variable
  perf: arm_spe: Support new SPEv1.2/v8.7 'not taken' event
  perf: arm_spe: Use new PMSIDR_EL1 register enums
  perf: arm_spe: Drop BIT() and use FIELD_GET/PREP accessors
  arm64/sysreg: Convert SPE registers to automatic generation
  arm64: Drop SYS_ from SPE register defines
  perf: arm_spe: Use feature numbering for PMSEVFR_EL1 defines
  perf/marvell: Add ACPI support to TAD uncore driver
  perf/marvell: Add ACPI support to DDR uncore driver
  perf/arm-cmn: Reset DTM_PMU_CONFIG at probe
  drivers/perf: hisi: Extract initialization of "cpa_pmu->pmu"
  drivers/perf: hisi: Simplify the parameters of hisi_pmu_init()
  drivers/perf: hisi: Advertise the PERF_PMU_CAP_NO_EXCLUDE capability

* for-next/sysreg:
  : arm64 sysreg and cpufeature fixes/updates
  KVM: arm64: Use symbolic definition for ISR_EL1.A
  arm64/sysreg: Add definition of ISR_EL1
  arm64/sysreg: Add definition for ICC_NMIAR1_EL1
  arm64/cpufeature: Remove 4 bit assumption in ARM64_FEATURE_MASK()
  arm64/sysreg: Fix errors in 32 bit enumeration values
  arm64/cpufeature: Fix field sign for DIT hwcap detection

* for-next/sme:
  : SME-related updates
  arm64/sme: Optimise SME exit on syscall entry
  arm64/sme: Don't use streaming mode to probe the maximum SME VL
  arm64/ptrace: Use system_supports_tpidr2() to check for TPIDR2 support

* for-next/kselftest: (23 commits)
  : arm64 kselftest fixes and improvements
  kselftest/arm64: Don't require FA64 for streaming SVE+ZA tests
  kselftest/arm64: Copy whole EXTRA context
  kselftest/arm64: Fix enumeration of systems without 128 bit SME for SSVE+ZA
  kselftest/arm64: Fix enumeration of systems without 128 bit SME
  kselftest/arm64: Don't require FA64 for streaming SVE tests
  kselftest/arm64: Limit the maximum VL we try to set via ptrace
  kselftest/arm64: Correct buffer size for SME ZA storage
  kselftest/arm64: Remove the local NUM_VL definition
  kselftest/arm64: Verify simultaneous SSVE and ZA context generation
  kselftest/arm64: Verify that SSVE signal context has SVE_SIG_FLAG_SM set
  kselftest/arm64: Remove spurious comment from MTE test Makefile
  kselftest/arm64: Support build of MTE tests with clang
  kselftest/arm64: Initialise current at build time in signal tests
  kselftest/arm64: Don't pass headers to the compiler as source
  kselftest/arm64: Remove redundant _start labels from FP tests
  kselftest/arm64: Fix .pushsection for strings in FP tests
  kselftest/arm64: Run BTI selftests on systems without BTI
  kselftest/arm64: Fix test numbering when skipping tests
  kselftest/arm64: Skip non-power of 2 SVE vector lengths in fp-stress
  kselftest/arm64: Only enumerate power of two VLs in syscall-abi
  ...

* for-next/misc:
  : Miscellaneous arm64 updates
  arm64/mm: Intercept pfn changes in set_pte_at()
  Documentation: arm64: correct spelling
  arm64: traps: attempt to dump all instructions
  arm64: Apply dynamic shadow call stack patching in two passes
  arm64: el2_setup.h: fix spelling typo in comments
  arm64: Kconfig: fix spelling
  arm64: cpufeature: Use kstrtobool() instead of strtobool()
  arm64: Avoid repeated AA64MMFR1_EL1 register read on pagefault path
  arm64: make ARCH_FORCE_MAX_ORDER selectable

* for-next/sme2: (23 commits)
  : Support for arm64 SME 2 and 2.1
  arm64/sme: Fix __finalise_el2 SMEver check
  kselftest/arm64: Remove redundant _start labels from zt-test
  kselftest/arm64: Add coverage of SME 2 and 2.1 hwcaps
  kselftest/arm64: Add coverage of the ZT ptrace regset
  kselftest/arm64: Add SME2 coverage to syscall-abi
  kselftest/arm64: Add test coverage for ZT register signal frames
  kselftest/arm64: Teach the generic signal context validation about ZT
  kselftest/arm64: Enumerate SME2 in the signal test utility code
  kselftest/arm64: Cover ZT in the FP stress test
  kselftest/arm64: Add a stress test program for ZT0
  arm64/sme: Add hwcaps for SME 2 and 2.1 features
  arm64/sme: Implement ZT0 ptrace support
  arm64/sme: Implement signal handling for ZT
  arm64/sme: Implement context switching for ZT0
  arm64/sme: Provide storage for ZT0
  arm64/sme: Add basic enumeration for SME2
  arm64/sme: Enable host kernel to access ZT0
  arm64/sme: Manually encode ZT0 load and store instructions
  arm64/esr: Document ISS for ZT0 being disabled
  arm64/sme: Document SME 2 and SME 2.1 ABI
  ...

* for-next/tpidr2:
  : Include TPIDR2 in the signal context
  kselftest/arm64: Add test case for TPIDR2 signal frame records
  kselftest/arm64: Add TPIDR2 to the set of known signal context records
  arm64/signal: Include TPIDR2 in the signal context
  arm64/sme: Document ABI for TPIDR2 signal information

* for-next/scs:
  : arm64: harden shadow call stack pointer handling
  arm64: Stash shadow stack pointer in the task struct on interrupt
  arm64: Always load shadow stack pointer directly from the task struct

* for-next/compat-hwcap:
  : arm64: Expose compat ARMv8 AArch32 features (HWCAPs)
  arm64: Add compat hwcap SSBS
  arm64: Add compat hwcap SB
  arm64: Add compat hwcap I8MM
  arm64: Add compat hwcap ASIMDBF16
  arm64: Add compat hwcap ASIMDFHM
  arm64: Add compat hwcap ASIMDDP
  arm64: Add compat hwcap FPHP and ASIMDHP

* for-next/ftrace:
  : Add arm64 support for DYNAMICE_FTRACE_WITH_CALL_OPS
  arm64: avoid executing padding bytes during kexec / hibernation
  arm64: Implement HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS
  arm64: ftrace: Update stale comment
  arm64: patching: Add aarch64_insn_write_literal_u64()
  arm64: insn: Add helpers for BTI
  arm64: Extend support for CONFIG_FUNCTION_ALIGNMENT
  ACPI: Don't build ACPICA with '-Os'
  Compiler attributes: GCC cold function alignment workarounds
  ftrace: Add DYNAMIC_FTRACE_WITH_CALL_OPS

* for-next/efi-boot-mmu-on:
  : Permit arm64 EFI boot with MMU and caches on
  arm64: kprobes: Drop ID map text from kprobes blacklist
  arm64: head: Switch endianness before populating the ID map
  efi: arm64: enter with MMU and caches enabled
  arm64: head: Clean the ID map and the HYP text to the PoC if needed
  arm64: head: avoid cache invalidation when entering with the MMU on
  arm64: head: record the MMU state at primary entry
  arm64: kernel: move identity map out of .text mapping
  arm64: head: Move all finalise_el2 calls to after __enable_mmu

* for-next/ptrauth:
  : arm64 pointer authentication cleanup
  arm64: pauth: don't sign leaf functions
  arm64: unify asm-arch manipulation

* for-next/pseudo-nmi:
  : Pseudo-NMI code generation optimisations
  arm64: irqflags: use alternative branches for pseudo-NMI logic
  arm64: add ARM64_HAS_GIC_PRIO_RELAXED_SYNC cpucap
  arm64: make ARM64_HAS_GIC_PRIO_MASKING depend on ARM64_HAS_GIC_CPUIF_SYSREGS
  arm64: rename ARM64_HAS_IRQ_PRIO_MASKING to ARM64_HAS_GIC_PRIO_MASKING
  arm64: rename ARM64_HAS_SYSREG_GIC_CPUIF to ARM64_HAS_GIC_CPUIF_SYSREGS
This commit is contained in:
Catalin Marinas 2023-02-10 18:51:49 +00:00
commit 156010ed9c
104 changed files with 2994 additions and 553 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/arm64/booting.rst
View File

@ -223,7 +223,7 @@ Before jumping into the kernel, the following conditions must be met:
For systems with a GICv3 interrupt controller to be used in v3 mode:
- If EL3 is present:
- ICC_SRE_EL3.Enable (bit 3) must be initialiased to 0b1.
- ICC_SRE_EL3.Enable (bit 3) must be initialised to 0b1.
- ICC_SRE_EL3.SRE (bit 0) must be initialised to 0b1.
- ICC_CTLR_EL3.PMHE (bit 6) must be set to the same value across
all CPUs the kernel is executing on, and must stay constant
@ -369,6 +369,16 @@ Before jumping into the kernel, the following conditions must be met:
- HCR_EL2.ATA (bit 56) must be initialised to 0b1.
For CPUs with the Scalable Matrix Extension version 2 (FEAT_SME2):
- If EL3 is present:
- SMCR_EL3.EZT0 (bit 30) must be initialised to 0b1.
- If the kernel is entered at EL1 and EL2 is present:
- SMCR_EL2.EZT0 (bit 30) must be initialised to 0b1.
The requirements described above for CPU mode, caches, MMUs, architected
timers, coherency and system registers apply to all CPUs. All CPUs must
enter the kernel in the same exception level. Where the values documented

20
Documentation/arm64/elf_hwcaps.rst
View File

@ -14,7 +14,7 @@ Some hardware or software features are only available on some CPU
implementations, and/or with certain kernel configurations, but have no
architected discovery mechanism available to userspace code at EL0. The
kernel exposes the presence of these features to userspace through a set
of flags called hwcaps, exposed in the auxilliary vector.
of flags called hwcaps, exposed in the auxiliary vector.
Userspace software can test for features by acquiring the AT_HWCAP or
AT_HWCAP2 entry of the auxiliary vector, and testing whether the relevant
@ -284,6 +284,24 @@ HWCAP2_RPRFM
HWCAP2_SVE2P1
Functionality implied by ID_AA64ZFR0_EL1.SVEver == 0b0010.
HWCAP2_SME2
Functionality implied by ID_AA64SMFR0_EL1.SMEver == 0b0001.
HWCAP2_SME2P1
Functionality implied by ID_AA64SMFR0_EL1.SMEver == 0b0010.
HWCAP2_SMEI16I32
Functionality implied by ID_AA64SMFR0_EL1.I16I32 == 0b0101
HWCAP2_SMEBI32I32
Functionality implied by ID_AA64SMFR0_EL1.BI32I32 == 0b1
HWCAP2_SMEB16B16
Functionality implied by ID_AA64SMFR0_EL1.B16B16 == 0b1
HWCAP2_SMEF16F16
Functionality implied by ID_AA64SMFR0_EL1.F16F16 == 0b1
4. Unused AT_HWCAP bits
-----------------------

55
Documentation/arm64/sme.rst
View File

@ -18,14 +18,19 @@ model features for SME is included in Appendix A.
1. General
-----------
* PSTATE.SM, PSTATE.ZA, the streaming mode vector length, the ZA
register state and TPIDR2_EL0 are tracked per thread.
* PSTATE.SM, PSTATE.ZA, the streaming mode vector length, the ZA and (when
present) ZTn register state and TPIDR2_EL0 are tracked per thread.
* The presence of SME is reported to userspace via HWCAP2_SME in the aux vector
AT_HWCAP2 entry. Presence of this flag implies the presence of the SME
instructions and registers, and the Linux-specific system interfaces
described in this document. SME is reported in /proc/cpuinfo as "sme".
* The presence of SME2 is reported to userspace via HWCAP2_SME2 in the
aux vector AT_HWCAP2 entry. Presence of this flag implies the presence of
the SME2 instructions and ZT0, and the Linux-specific system interfaces
described in this document. SME2 is reported in /proc/cpuinfo as "sme2".
* Support for the execution of SME instructions in userspace can also be
detected by reading the CPU ID register ID_AA64PFR1_EL1 using an MRS
instruction, and checking that the value of the SME field is nonzero. [3]
@ -44,6 +49,7 @@ model features for SME is included in Appendix A.
HWCAP2_SME_B16F32
HWCAP2_SME_F32F32
HWCAP2_SME_FA64
HWCAP2_SME2
This list may be extended over time as the SME architecture evolves.
@ -52,8 +58,8 @@ model features for SME is included in Appendix A.
cpu-feature-registers.txt for details.
* Debuggers should restrict themselves to interacting with the target via the
NT_ARM_SVE, NT_ARM_SSVE and NT_ARM_ZA regsets. The recommended way
of detecting support for these regsets is to connect to a target process
NT_ARM_SVE, NT_ARM_SSVE, NT_ARM_ZA and NT_ARM_ZT regsets. The recommended
way of detecting support for these regsets is to connect to a target process
first and then attempt a
ptrace(PTRACE_GETREGSET, pid, NT_ARM_<regset>, &iov).
@ -89,13 +95,13 @@ be zeroed.
-------------------------
* On syscall PSTATE.ZA is preserved, if PSTATE.ZA==1 then the contents of the
ZA matrix are preserved.
ZA matrix and ZTn (if present) are preserved.
* On syscall PSTATE.SM will be cleared and the SVE registers will be handled
as per the standard SVE ABI.
* Neither the SVE registers nor ZA are used to pass arguments to or receive
results from any syscall.
* None of the SVE registers, ZA or ZTn are used to pass arguments to
or receive results from any syscall.
* On process creation (eg, clone()) the newly created process will have
PSTATE.SM cleared.
@ -111,6 +117,9 @@ be zeroed.
* Signal handlers are invoked with streaming mode and ZA disabled.
* A new signal frame record TPIDR2_MAGIC is added formatted as a struct
tpidr2_context to allow access to TPIDR2_EL0 from signal handlers.
* A new signal frame record za_context encodes the ZA register contents on
signal delivery. [1]
@ -134,6 +143,14 @@ be zeroed.
__reserved[] referencing this space. za_context is then written in the
extra space. Refer to [1] for further details about this mechanism.
* If ZTn is supported and PSTATE.ZA==1 then a signal frame record for ZTn will
be generated.
* The signal record for ZTn has magic ZT_MAGIC (0x5a544e01) and consists of a
standard signal frame header followed by a struct zt_context specifying
the number of ZTn registers supported by the system, then zt_context.nregs
blocks of 64 bytes of data per register.
5. Signal return
-----------------
@ -151,6 +168,9 @@ When returning from a signal handler:
the signal frame does not match the current vector length, the signal return
attempt is treated as illegal, resulting in a forced SIGSEGV.
* If ZTn is not supported or PSTATE.ZA==0 then it is illegal to have a
signal frame record for ZTn, resulting in a forced SIGSEGV.
6. prctl extensions
--------------------
@ -214,8 +234,8 @@ prctl(PR_SME_SET_VL, unsigned long arg)
vector length that will be applied at the next execve() by the calling
thread.
* Changing the vector length causes all of ZA, P0..P15, FFR and all bits of
Z0..Z31 except for Z0 bits [127:0] .. Z31 bits [127:0] to become
* Changing the vector length causes all of ZA, ZTn, P0..P15, FFR and all
bits of Z0..Z31 except for Z0 bits [127:0] .. Z31 bits [127:0] to become
unspecified, including both streaming and non-streaming SVE state.
Calling PR_SME_SET_VL with vl equal to the thread's current vector
length, or calling PR_SME_SET_VL with the PR_SVE_SET_VL_ONEXEC flag,
@ -317,6 +337,15 @@ The regset data starts with struct user_za_header, containing:
* The effect of writing a partial, incomplete payload is unspecified.
* A new regset NT_ARM_ZT is defined for access to ZTn state via
PTRACE_GETREGSET and PTRACE_SETREGSET.
* The NT_ARM_ZT regset consists of a single 512 bit register.
* When PSTATE.ZA==0 reads of NT_ARM_ZT will report all bits of ZTn as 0.
* Writes to NT_ARM_ZT will set PSTATE.ZA to 1.
8. ELF coredump extensions
---------------------------
@ -331,6 +360,11 @@ The regset data starts with struct user_za_header, containing:
been read if a PTRACE_GETREGSET of NT_ARM_ZA were executed for each thread
when the coredump was generated.
* A NT_ARM_ZT note will be added to each coredump for each thread of the
dumped process. The contents will be equivalent to the data that would have
been read if a PTRACE_GETREGSET of NT_ARM_ZT were executed for each thread
when the coredump was generated.
* The NT_ARM_TLS note will be extended to two registers, the second register
will contain TPIDR2_EL0 on systems that support SME and will be read as
zero with writes ignored otherwise.
@ -406,6 +440,9 @@ In A64 state, SME adds the following:
For best system performance it is strongly encouraged for software to enable
ZA only when it is actively being used.
* A new ZT0 register is introduced when SME2 is present. This is a 512 bit
register which is accessible when PSTATE.ZA is set, as ZA itself is.
* Two new 1 bit fields in PSTATE which may be controlled via the SMSTART and
SMSTOP instructions or by access to the SVCR system register:

4
Documentation/arm64/sve.rst
View File

@ -175,7 +175,7 @@ the SVE instruction set architecture.
When returning from a signal handler:
* If there is no sve_context record in the signal frame, or if the record is
present but contains no register data as desribed in the previous section,
present but contains no register data as described in the previous section,
then the SVE registers/bits become non-live and take unspecified values.
* If sve_context is present in the signal frame and contains full register
@ -223,7 +223,7 @@ prctl(PR_SVE_SET_VL, unsigned long arg)
Defer the requested vector length change until the next execve()
performed by this thread.
The effect is equivalent to implicit exceution of the following
The effect is equivalent to implicit execution of the following
call immediately after the next execve() (if any) by the thread:
prctl(PR_SVE_SET_VL, arg & ~PR_SVE_SET_VL_ONEXEC)

5
arch/arm/include/asm/arch_gicv3.h
View File

@ -252,5 +252,10 @@ static inline void gic_arch_enable_irqs(void)
WARN_ON_ONCE(true);
}
static inline bool gic_has_relaxed_pmr_sync(void)
{
return false;
}
#endif /* !__ASSEMBLY__ */
#endif /* !__ASM_ARCH_GICV3_H */

25
arch/arm64/Kconfig
View File

@ -123,6 +123,8 @@ config ARM64
select DMA_DIRECT_REMAP
select EDAC_SUPPORT
select FRAME_POINTER
select FUNCTION_ALIGNMENT_4B
select FUNCTION_ALIGNMENT_8B if DYNAMIC_FTRACE_WITH_CALL_OPS
select GENERIC_ALLOCATOR
select GENERIC_ARCH_TOPOLOGY
select GENERIC_CLOCKEVENTS_BROADCAST
@ -186,6 +188,8 @@ config ARM64
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_ARGS \
if $(cc-option,-fpatchable-function-entry=2)
select HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS \
if (DYNAMIC_FTRACE_WITH_ARGS && !CFI_CLANG)
select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY \
if DYNAMIC_FTRACE_WITH_ARGS
select HAVE_EFFICIENT_UNALIGNED_ACCESS
@ -1456,10 +1460,23 @@ config XEN
help
Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
# include/linux/mmzone.h requires the following to be true:
#
# MAX_ORDER - 1 + PAGE_SHIFT <= SECTION_SIZE_BITS
#
# so the maximum value of MAX_ORDER is SECTION_SIZE_BITS + 1 - PAGE_SHIFT:
#
# | SECTION_SIZE_BITS | PAGE_SHIFT | max MAX_ORDER | default MAX_ORDER |
# ----+-------------------+--------------+-----------------+--------------------+
# 4K | 27 | 12 | 16 | 11 |
# 16K | 27 | 14 | 14 | 12 |
# 64K | 29 | 16 | 14 | 14 |
config ARCH_FORCE_MAX_ORDER
int
int "Maximum zone order" if ARM64_4K_PAGES || ARM64_16K_PAGES
default "14" if ARM64_64K_PAGES
range 12 14 if ARM64_16K_PAGES
default "12" if ARM64_16K_PAGES
range 11 16 if ARM64_4K_PAGES
default "11"
help
The kernel memory allocator divides physically contiguous memory
@ -1472,7 +1489,7 @@ config ARCH_FORCE_MAX_ORDER
This config option is actually maximum order plus one. For example,
a value of 11 means that the largest free memory block is 2^10 pages.
We make sure that we can allocate upto a HugePage size for each configuration.
We make sure that we can allocate up to a HugePage size for each configuration.
Hence we have :
MAX_ORDER = (PMD_SHIFT - PAGE_SHIFT) + 1 => PAGE_SHIFT - 2
@ -1818,7 +1835,7 @@ config ARM64_PTR_AUTH_KERNEL
bool "Use pointer authentication for kernel"
default y
depends on ARM64_PTR_AUTH
depends on (CC_HAS_SIGN_RETURN_ADDRESS || CC_HAS_BRANCH_PROT_PAC_RET) && AS_HAS_PAC
depends on (CC_HAS_SIGN_RETURN_ADDRESS || CC_HAS_BRANCH_PROT_PAC_RET) && AS_HAS_ARMV8_3
# Modern compilers insert a .note.gnu.property section note for PAC
# which is only understood by binutils starting with version 2.33.1.
depends on LD_IS_LLD || LD_VERSION >= 23301 || (CC_IS_GCC && GCC_VERSION < 90100)
@ -1843,7 +1860,7 @@ config CC_HAS_SIGN_RETURN_ADDRESS
# GCC 7, 8
def_bool $(cc-option,-msign-return-address=all)
config AS_HAS_PAC
config AS_HAS_ARMV8_3
def_bool $(cc-option,-Wa$(comma)-march=armv8.3-a)
config AS_HAS_CFI_NEGATE_RA_STATE

2
arch/arm64/Kconfig.platforms
View File

@ -187,7 +187,7 @@ config ARCH_MVEBU
select PINCTRL_ARMADA_CP110
select PINCTRL_AC5
help
This enables support for Marvell EBU familly, including:
This enables support for Marvell EBU family, including:
- Armada 3700 SoC Family
- Armada 7K SoC Family
- Armada 8K SoC Family

70
arch/arm64/Makefile
View File

@ -63,50 +63,37 @@ stack_protector_prepare: prepare0
include/generated/asm-offsets.h))
endif
ifeq ($(CONFIG_AS_HAS_ARMV8_2), y)
# make sure to pass the newest target architecture to -march.
asm-arch := armv8.2-a
endif
# Ensure that if the compiler supports branch protection we default it
# off, this will be overridden if we are using branch protection.
branch-prot-flags-y += $(call cc-option,-mbranch-protection=none)
ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y)
branch-prot-flags-$(CONFIG_CC_HAS_SIGN_RETURN_ADDRESS) := -msign-return-address=all
# We enable additional protection for leaf functions as there is some
# narrow potential for ROP protection benefits and no substantial
# performance impact has been observed.
PACRET-y := pac-ret+leaf
# Using a shadow call stack in leaf functions is too costly, so avoid PAC there
# as well when we may be patching PAC into SCS
PACRET-$(CONFIG_UNWIND_PATCH_PAC_INTO_SCS) := pac-ret
ifeq ($(CONFIG_ARM64_BTI_KERNEL),y)
branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET_BTI) := -mbranch-protection=$(PACRET-y)+bti
KBUILD_CFLAGS += -mbranch-protection=pac-ret+bti
else ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y)
ifeq ($(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET),y)
KBUILD_CFLAGS += -mbranch-protection=pac-ret
else
KBUILD_CFLAGS += -msign-return-address=non-leaf
endif
else
branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=$(PACRET-y)
endif
# -march=armv8.3-a enables the non-nops instructions for PAC, to avoid the
# compiler to generate them and consequently to break the single image contract
# we pass it only to the assembler. This option is utilized only in case of non
# integrated assemblers.
ifeq ($(CONFIG_AS_HAS_PAC), y)
asm-arch := armv8.3-a
endif
endif
KBUILD_CFLAGS += $(branch-prot-flags-y)
ifeq ($(CONFIG_AS_HAS_ARMV8_4), y)
# make sure to pass the newest target architecture to -march.
asm-arch := armv8.4-a
KBUILD_CFLAGS += $(call cc-option,-mbranch-protection=none)
endif
# Tell the assembler to support instructions from the latest target
# architecture.
#
# For non-integrated assemblers we'll pass this on the command line, and for
# integrated assemblers we'll define ARM64_ASM_ARCH and ARM64_ASM_PREAMBLE for
# inline usage.
#
# We cannot pass the same arch flag to the compiler as this would allow it to
# freely generate instructions which are not supported by earlier architecture
# versions, which would prevent a single kernel image from working on earlier
# hardware.
ifeq ($(CONFIG_AS_HAS_ARMV8_5), y)
# make sure to pass the newest target architecture to -march.
asm-arch := armv8.5-a
asm-arch := armv8.5-a
else ifeq ($(CONFIG_AS_HAS_ARMV8_4), y)
asm-arch := armv8.4-a
else ifeq ($(CONFIG_AS_HAS_ARMV8_3), y)
asm-arch := armv8.3-a
else ifeq ($(CONFIG_AS_HAS_ARMV8_2), y)
asm-arch := armv8.2-a
endif
ifdef asm-arch
@ -139,7 +126,10 @@ endif
CHECKFLAGS += -D__aarch64__
ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_ARGS),y)
ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS),y)
KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
CC_FLAGS_FTRACE := -fpatchable-function-entry=4,2
else ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_ARGS),y)
KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
CC_FLAGS_FTRACE := -fpatchable-function-entry=2
endif

5
arch/arm64/include/asm/arch_gicv3.h
View File

@ -190,5 +190,10 @@ static inline void gic_arch_enable_irqs(void)
asm volatile ("msr daifclr, #3" : : : "memory");
}
static inline bool gic_has_relaxed_pmr_sync(void)
{
return cpus_have_cap(ARM64_HAS_GIC_PRIO_RELAXED_SYNC);
}
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ARCH_GICV3_H */

11
arch/arm64/include/asm/barrier.h
View File

@ -11,6 +11,8 @@
#include <linux/kasan-checks.h>
#include <asm/alternative-macros.h>
#define __nops(n) ".rept " #n "\nnop\n.endr\n"
#define nops(n) asm volatile(__nops(n))
@ -41,10 +43,11 @@
#ifdef CONFIG_ARM64_PSEUDO_NMI
#define pmr_sync() \
do { \
extern struct static_key_false gic_pmr_sync; \
\
if (static_branch_unlikely(&gic_pmr_sync)) \
dsb(sy); \
asm volatile( \
ALTERNATIVE_CB("dsb sy", \
ARM64_HAS_GIC_PRIO_RELAXED_SYNC, \
alt_cb_patch_nops) \
); \
} while(0)
#else
#define pmr_sync() do {} while (0)

14
arch/arm64/include/asm/cpufeature.h
View File

@ -769,6 +769,12 @@ static __always_inline bool system_supports_sme(void)
cpus_have_const_cap(ARM64_SME);
}
static __always_inline bool system_supports_sme2(void)
{
return IS_ENABLED(CONFIG_ARM64_SME) &&
cpus_have_const_cap(ARM64_SME2);
}
static __always_inline bool system_supports_fa64(void)
{
return IS_ENABLED(CONFIG_ARM64_SME) &&
@ -806,7 +812,7 @@ static inline bool system_has_full_ptr_auth(void)
static __always_inline bool system_uses_irq_prio_masking(void)
{
return IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI) &&
cpus_have_const_cap(ARM64_HAS_IRQ_PRIO_MASKING);
cpus_have_const_cap(ARM64_HAS_GIC_PRIO_MASKING);
}
static inline bool system_supports_mte(void)
@ -864,7 +870,11 @@ static inline bool cpu_has_hw_af(void)
if (!IS_ENABLED(CONFIG_ARM64_HW_AFDBM))
return false;
mmfr1 = read_cpuid(ID_AA64MMFR1_EL1);
/*
* Use cached version to avoid emulated msr operation on KVM
* guests.
*/
mmfr1 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1);
return cpuid_feature_extract_unsigned_field(mmfr1,
ID_AA64MMFR1_EL1_HAFDBS_SHIFT);
}

2
arch/arm64/include/asm/efi.h
View File

@ -105,6 +105,8 @@ static inline unsigned long efi_get_kimg_min_align(void)
#define EFI_ALLOC_ALIGN SZ_64K
#define EFI_ALLOC_LIMIT ((1UL << 48) - 1)
extern unsigned long primary_entry_offset(void);
/*
* On ARM systems, virtually remapped UEFI runtime services are set up in two
* distinct stages:

2
arch/arm64/include/asm/el2_setup.h
View File

@ -177,7 +177,7 @@
/**
* Initialize EL2 registers to sane values. This should be called early on all
* cores that were booted in EL2. Note that everything gets initialised as
* if VHE was not evailable. The kernel context will be upgraded to VHE
* if VHE was not available. The kernel context will be upgraded to VHE
* if possible later on in the boot process
*
* Regs: x0, x1 and x2 are clobbered.

1
arch/arm64/include/asm/esr.h
View File

@ -341,6 +341,7 @@
#define ESR_ELx_SME_ISS_ILL 1
#define ESR_ELx_SME_ISS_SM_DISABLED 2
#define ESR_ELx_SME_ISS_ZA_DISABLED 3
#define ESR_ELx_SME_ISS_ZT_DISABLED 4
#ifndef __ASSEMBLY__
#include <asm/types.h>

30
arch/arm64/include/asm/fpsimd.h
View File

@ -61,7 +61,7 @@ extern void fpsimd_kvm_prepare(void);
struct cpu_fp_state {
struct user_fpsimd_state *st;
void *sve_state;
void *za_state;
void *sme_state;
u64 *svcr;
unsigned int sve_vl;
unsigned int sme_vl;
@ -105,6 +105,13 @@ static inline void *sve_pffr(struct thread_struct *thread)
return (char *)thread->sve_state + sve_ffr_offset(vl);
}
static inline void *thread_zt_state(struct thread_struct *thread)
{
/* The ZT register state is stored immediately after the ZA state */
unsigned int sme_vq = sve_vq_from_vl(thread_get_sme_vl(thread));
return thread->sme_state + ZA_SIG_REGS_SIZE(sme_vq);
}
extern void sve_save_state(void *state, u32 *pfpsr, int save_ffr);
extern void sve_load_state(void const *state, u32 const *pfpsr,
int restore_ffr);
@ -112,12 +119,13 @@ extern void sve_flush_live(bool flush_ffr, unsigned long vq_minus_1);
extern unsigned int sve_get_vl(void);
extern void sve_set_vq(unsigned long vq_minus_1);
extern void sme_set_vq(unsigned long vq_minus_1);
extern void za_save_state(void *state);
extern void za_load_state(void const *state);
extern void sme_save_state(void *state, int zt);
extern void sme_load_state(void const *state, int zt);
struct arm64_cpu_capabilities;
extern void sve_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern void sme_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern void sme2_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern void fa64_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern u64 read_zcr_features(void);
@ -355,14 +363,20 @@ extern int sme_get_current_vl(void);
/*
* Return how many bytes of memory are required to store the full SME
* specific state (currently just ZA) for task, given task's currently
* configured vector length.
* specific state for task, given task's currently configured vector
* length.
*/
static inline size_t za_state_size(struct task_struct const *task)
static inline size_t sme_state_size(struct task_struct const *task)
{
unsigned int vl = task_get_sme_vl(task);
size_t size;
return ZA_SIG_REGS_SIZE(sve_vq_from_vl(vl));
size = ZA_SIG_REGS_SIZE(sve_vq_from_vl(vl));
if (system_supports_sme2())
size += ZT_SIG_REG_SIZE;
return size;
}
#else
@ -382,7 +396,7 @@ static inline int sme_max_virtualisable_vl(void) { return 0; }
static inline int sme_set_current_vl(unsigned long arg) { return -EINVAL; }
static inline int sme_get_current_vl(void) { return -EINVAL; }
static inline size_t za_state_size(struct task_struct const *task)
static inline size_t sme_state_size(struct task_struct const *task)
{
return 0;
}

22
arch/arm64/include/asm/fpsimdmacros.h
View File

@ -220,6 +220,28 @@
| ((\offset) & 7)
.endm
/*
* LDR (ZT0)
*
* LDR ZT0, nx
*/
.macro _ldr_zt nx
_check_general_reg \nx
.inst 0xe11f8000 \
| (\nx << 5)
.endm
/*
* STR (ZT0)
*
* STR ZT0, nx
*/
.macro _str_zt nx
_check_general_reg \nx
.inst 0xe13f8000 \
| (\nx << 5)
.endm
/*
* Zero the entire ZA array
* ZERO ZA

15
arch/arm64/include/asm/ftrace.h
View File

@ -62,20 +62,7 @@ extern unsigned long ftrace_graph_call;
extern void return_to_handler(void);
static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
/*
* Adjust addr to point at the BL in the callsite.
* See ftrace_init_nop() for the callsite sequence.
*/
if (IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_ARGS))
return addr + AARCH64_INSN_SIZE;
/*
* addr is the address of the mcount call instruction.
* recordmcount does the necessary offset calculation.
*/
return addr;
}
unsigned long ftrace_call_adjust(unsigned long addr);
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS
struct dyn_ftrace;

14
arch/arm64/include/asm/hwcap.h
View File

@ -31,12 +31,20 @@
#define COMPAT_HWCAP_VFPD32 (1 << 19)
#define COMPAT_HWCAP_LPAE (1 << 20)
#define COMPAT_HWCAP_EVTSTRM (1 << 21)
#define COMPAT_HWCAP_FPHP (1 << 22)
#define COMPAT_HWCAP_ASIMDHP (1 << 23)
#define COMPAT_HWCAP_ASIMDDP (1 << 24)
#define COMPAT_HWCAP_ASIMDFHM (1 << 25)
#define COMPAT_HWCAP_ASIMDBF16 (1 << 26)
#define COMPAT_HWCAP_I8MM (1 << 27)
#define COMPAT_HWCAP2_AES (1 << 0)
#define COMPAT_HWCAP2_PMULL (1 << 1)
#define COMPAT_HWCAP2_SHA1 (1 << 2)
#define COMPAT_HWCAP2_SHA2 (1 << 3)
#define COMPAT_HWCAP2_CRC32 (1 << 4)
#define COMPAT_HWCAP2_SB (1 << 5)
#define COMPAT_HWCAP2_SSBS (1 << 6)
#ifndef __ASSEMBLY__
#include <linux/log2.h>
@ -123,6 +131,12 @@
#define KERNEL_HWCAP_CSSC __khwcap2_feature(CSSC)
#define KERNEL_HWCAP_RPRFM __khwcap2_feature(RPRFM)
#define KERNEL_HWCAP_SVE2P1 __khwcap2_feature(SVE2P1)
#define KERNEL_HWCAP_SME2 __khwcap2_feature(SME2)
#define KERNEL_HWCAP_SME2P1 __khwcap2_feature(SME2P1)
#define KERNEL_HWCAP_SME_I16I32 __khwcap2_feature(SME_I16I32)
#define KERNEL_HWCAP_SME_BI32I32 __khwcap2_feature(SME_BI32I32)
#define KERNEL_HWCAP_SME_B16B16 __khwcap2_feature(SME_B16B16)
#define KERNEL_HWCAP_SME_F16F16 __khwcap2_feature(SME_F16F16)
/*
* This yields a mask that user programs can use to figure out what

1
arch/arm64/include/asm/insn.h
View File

@ -420,6 +420,7 @@ __AARCH64_INSN_FUNCS(sb, 0xFFFFFFFF, 0xD50330FF)
__AARCH64_INSN_FUNCS(clrex, 0xFFFFF0FF, 0xD503305F)
__AARCH64_INSN_FUNCS(ssbb, 0xFFFFFFFF, 0xD503309F)
__AARCH64_INSN_FUNCS(pssbb, 0xFFFFFFFF, 0xD503349F)
__AARCH64_INSN_FUNCS(bti, 0xFFFFFF3F, 0xD503241f)
#undef __AARCH64_INSN_FUNCS

209
arch/arm64/include/asm/irqflags.h
View File

@ -21,43 +21,77 @@
* exceptions should be unmasked.
*/
/*
* CPU interrupt mask handling.
*/
static inline void arch_local_irq_enable(void)
static __always_inline bool __irqflags_uses_pmr(void)
{
if (system_has_prio_mask_debugging()) {
u32 pmr = read_sysreg_s(SYS_ICC_PMR_EL1);
return IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI) &&
alternative_has_feature_unlikely(ARM64_HAS_GIC_PRIO_MASKING);
}
static __always_inline void __daif_local_irq_enable(void)
{
barrier();
asm volatile("msr daifclr, #3");
barrier();
}
static __always_inline void __pmr_local_irq_enable(void)
{
if (IS_ENABLED(CONFIG_ARM64_DEBUG_PRIORITY_MASKING)) {
u32 pmr = read_sysreg_s(SYS_ICC_PMR_EL1);
WARN_ON_ONCE(pmr != GIC_PRIO_IRQON && pmr != GIC_PRIO_IRQOFF);
}
asm volatile(ALTERNATIVE(
"msr daifclr, #3 // arch_local_irq_enable",
__msr_s(SYS_ICC_PMR_EL1, "%0"),
ARM64_HAS_IRQ_PRIO_MASKING)
:
: "r" ((unsigned long) GIC_PRIO_IRQON)
: "memory");
barrier();
write_sysreg_s(GIC_PRIO_IRQON, SYS_ICC_PMR_EL1);
pmr_sync();
barrier();
}
static inline void arch_local_irq_enable(void)
{
if (__irqflags_uses_pmr()) {
__pmr_local_irq_enable();
} else {
__daif_local_irq_enable();
}
}
static __always_inline void __daif_local_irq_disable(void)
{
barrier();
asm volatile("msr daifset, #3");
barrier();
}
static __always_inline void __pmr_local_irq_disable(void)
{
if (IS_ENABLED(CONFIG_ARM64_DEBUG_PRIORITY_MASKING)) {
u32 pmr = read_sysreg_s(SYS_ICC_PMR_EL1);
WARN_ON_ONCE(pmr != GIC_PRIO_IRQON && pmr != GIC_PRIO_IRQOFF);
}
barrier();
write_sysreg_s(GIC_PRIO_IRQOFF, SYS_ICC_PMR_EL1);
barrier();
}
static inline void arch_local_irq_disable(void)
{
if (system_has_prio_mask_debugging()) {
u32 pmr = read_sysreg_s(SYS_ICC_PMR_EL1);
WARN_ON_ONCE(pmr != GIC_PRIO_IRQON && pmr != GIC_PRIO_IRQOFF);
if (__irqflags_uses_pmr()) {
__pmr_local_irq_disable();
} else {
__daif_local_irq_disable();
}
}
asm volatile(ALTERNATIVE(
"msr daifset, #3 // arch_local_irq_disable",
__msr_s(SYS_ICC_PMR_EL1, "%0"),
ARM64_HAS_IRQ_PRIO_MASKING)
:
: "r" ((unsigned long) GIC_PRIO_IRQOFF)
: "memory");
static __always_inline unsigned long __daif_local_save_flags(void)
{
return read_sysreg(daif);
}
static __always_inline unsigned long __pmr_local_save_flags(void)
{
return read_sysreg_s(SYS_ICC_PMR_EL1);
}
/*
@ -65,69 +99,108 @@ static inline void arch_local_irq_disable(void)
*/
static inline unsigned long arch_local_save_flags(void)
{
unsigned long flags;
if (__irqflags_uses_pmr()) {
return __pmr_local_save_flags();
} else {
return __daif_local_save_flags();
}
}
asm volatile(ALTERNATIVE(
"mrs %0, daif",
__mrs_s("%0", SYS_ICC_PMR_EL1),
ARM64_HAS_IRQ_PRIO_MASKING)
: "=&r" (flags)
:
: "memory");
static __always_inline bool __daif_irqs_disabled_flags(unsigned long flags)
{
return flags & PSR_I_BIT;
}
static __always_inline bool __pmr_irqs_disabled_flags(unsigned long flags)
{
return flags != GIC_PRIO_IRQON;
}
static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
if (__irqflags_uses_pmr()) {
return __pmr_irqs_disabled_flags(flags);
} else {
return __daif_irqs_disabled_flags(flags);
}
}
static __always_inline bool __daif_irqs_disabled(void)
{
return __daif_irqs_disabled_flags(__daif_local_save_flags());
}
static __always_inline bool __pmr_irqs_disabled(void)
{
return __pmr_irqs_disabled_flags(__pmr_local_save_flags());
}
static inline bool arch_irqs_disabled(void)
{
if (__irqflags_uses_pmr()) {
return __pmr_irqs_disabled();
} else {
return __daif_irqs_disabled();
}
}
static __always_inline unsigned long __daif_local_irq_save(void)
{
unsigned long flags = __daif_local_save_flags();
__daif_local_irq_disable();
return flags;
}
static inline int arch_irqs_disabled_flags(unsigned long flags)
static __always_inline unsigned long __pmr_local_irq_save(void)
{
int res;
asm volatile(ALTERNATIVE(
"and %w0, %w1, #" __stringify(PSR_I_BIT),
"eor %w0, %w1, #" __stringify(GIC_PRIO_IRQON),
ARM64_HAS_IRQ_PRIO_MASKING)
: "=&r" (res)
: "r" ((int) flags)
: "memory");
return res;
}
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags;
flags = arch_local_save_flags();
unsigned long flags = __pmr_local_save_flags();
/*
* There are too many states with IRQs disabled, just keep the current
* state if interrupts are already disabled/masked.
*/
if (!arch_irqs_disabled_flags(flags))
arch_local_irq_disable();
if (!__pmr_irqs_disabled_flags(flags))
__pmr_local_irq_disable();
return flags;
}
static inline unsigned long arch_local_irq_save(void)
{
if (__irqflags_uses_pmr()) {
return __pmr_local_irq_save();
} else {
return __daif_local_irq_save();
}
}
static __always_inline void __daif_local_irq_restore(unsigned long flags)
{
barrier();
write_sysreg(flags, daif);
barrier();
}
static __always_inline void __pmr_local_irq_restore(unsigned long flags)
{
barrier();
write_sysreg_s(flags, SYS_ICC_PMR_EL1);
pmr_sync();
barrier();
}
/*
* restore saved IRQ state
*/
static inline void arch_local_irq_restore(unsigned long flags)
{
asm volatile(ALTERNATIVE(
"msr daif, %0",
__msr_s(SYS_ICC_PMR_EL1, "%0"),
ARM64_HAS_IRQ_PRIO_MASKING)
:
: "r" (flags)
: "memory");
pmr_sync();
if (__irqflags_uses_pmr()) {
__pmr_local_irq_restore(flags);
} else {
__daif_local_irq_restore(flags);
}
}
#endif /* __ASM_IRQFLAGS_H */

4
arch/arm64/include/asm/linkage.h
View File

@ -5,8 +5,8 @@
#include <asm/assembler.h>
#endif
#define __ALIGN .align 2
#define __ALIGN_STR ".align 2"
#define __ALIGN .balign CONFIG_FUNCTION_ALIGNMENT
#define __ALIGN_STR ".balign " #CONFIG_FUNCTION_ALIGNMENT
/*
* When using in-kernel BTI we need to ensure that PCS-conformant

2
arch/arm64/include/asm/patching.h
View File

@ -7,6 +7,8 @@
int aarch64_insn_read(void *addr, u32 *insnp);
int aarch64_insn_write(void *addr, u32 insn);
int aarch64_insn_write_literal_u64(void *addr, u64 val);
int aarch64_insn_patch_text_nosync(void *addr, u32 insn);
int aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt);

8
arch/arm64/include/asm/pgtable.h
View File

@ -275,6 +275,7 @@ static inline void set_pte(pte_t *ptep, pte_t pte)
}
extern void __sync_icache_dcache(pte_t pteval);
bool pgattr_change_is_safe(u64 old, u64 new);
/*
* PTE bits configuration in the presence of hardware Dirty Bit Management
@ -292,7 +293,7 @@ extern void __sync_icache_dcache(pte_t pteval);
* PTE_DIRTY || (PTE_WRITE && !PTE_RDONLY)
*/
static inline void __check_racy_pte_update(struct mm_struct *mm, pte_t *ptep,
static inline void __check_safe_pte_update(struct mm_struct *mm, pte_t *ptep,
pte_t pte)
{
pte_t old_pte;
@ -318,6 +319,9 @@ static inline void __check_racy_pte_update(struct mm_struct *mm, pte_t *ptep,
VM_WARN_ONCE(pte_write(old_pte) && !pte_dirty(pte),
"%s: racy dirty state clearing: 0x%016llx -> 0x%016llx",
__func__, pte_val(old_pte), pte_val(pte));
VM_WARN_ONCE(!pgattr_change_is_safe(pte_val(old_pte), pte_val(pte)),
"%s: unsafe attribute change: 0x%016llx -> 0x%016llx",
__func__, pte_val(old_pte), pte_val(pte));
}
static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
@ -346,7 +350,7 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
mte_sync_tags(old_pte, pte);
}
__check_racy_pte_update(mm, ptep, pte);
__check_safe_pte_update(mm, ptep, pte);
set_pte(ptep, pte);
}

2
arch/arm64/include/asm/processor.h
View File

@ -161,7 +161,7 @@ struct thread_struct {
enum fp_type fp_type; /* registers FPSIMD or SVE? */
unsigned int fpsimd_cpu;
void *sve_state; /* SVE registers, if any */
void *za_state; /* ZA register, if any */
void *sme_state; /* ZA and ZT state, if any */
unsigned int vl[ARM64_VEC_MAX]; /* vector length */
unsigned int vl_onexec[ARM64_VEC_MAX]; /* vl after next exec */
unsigned long fault_address; /* fault info */

2
arch/arm64/include/asm/ptrace.h
View File

@ -194,7 +194,7 @@ struct pt_regs {
u32 unused2;
#endif
u64 sdei_ttbr1;
/* Only valid when ARM64_HAS_IRQ_PRIO_MASKING is enabled. */
/* Only valid when ARM64_HAS_GIC_PRIO_MASKING is enabled. */
u64 pmr_save;
u64 stackframe[2];

7
arch/arm64/include/asm/scs.h
View File

@ -10,15 +10,16 @@
#ifdef CONFIG_SHADOW_CALL_STACK
scs_sp .req x18
.macro scs_load tsk
ldr scs_sp, [\tsk, #TSK_TI_SCS_SP]
.macro scs_load_current
get_current_task scs_sp
ldr scs_sp, [scs_sp, #TSK_TI_SCS_SP]
.endm
.macro scs_save tsk
str scs_sp, [\tsk, #TSK_TI_SCS_SP]
.endm
#else
.macro scs_load tsk
.macro scs_load_current
.endm
.macro scs_save tsk

7
arch/arm64/include/asm/sysreg.h
View File

@ -496,6 +496,7 @@
#define SCTLR_ELx_DSSBS (BIT(44))
#define SCTLR_ELx_ATA (BIT(43))
#define SCTLR_ELx_EE_SHIFT 25
#define SCTLR_ELx_ENIA_SHIFT 31
#define SCTLR_ELx_ITFSB (BIT(37))
@ -504,7 +505,7 @@
#define SCTLR_ELx_LSMAOE (BIT(29))
#define SCTLR_ELx_nTLSMD (BIT(28))
#define SCTLR_ELx_ENDA (BIT(27))
#define SCTLR_ELx_EE (BIT(25))
#define SCTLR_ELx_EE (BIT(SCTLR_ELx_EE_SHIFT))
#define SCTLR_ELx_EIS (BIT(22))
#define SCTLR_ELx_IESB (BIT(21))
#define SCTLR_ELx_TSCXT (BIT(20))
@ -730,8 +731,8 @@
#define ARM64_FEATURE_FIELD_BITS 4
/* Create a mask for the feature bits of the specified feature. */
#define ARM64_FEATURE_MASK(x) (GENMASK_ULL(x##_SHIFT + ARM64_FEATURE_FIELD_BITS - 1, x##_SHIFT))
/* Defined for compatibility only, do not add new users. */
#define ARM64_FEATURE_MASK(x) (x##_MASK)
#ifdef __ASSEMBLY__

6
arch/arm64/include/uapi/asm/hwcap.h
View File

@ -96,5 +96,11 @@
#define HWCAP2_CSSC (1UL << 34)
#define HWCAP2_RPRFM (1UL << 35)
#define HWCAP2_SVE2P1 (1UL << 36)
#define HWCAP2_SME2 (1UL << 37)
#define HWCAP2_SME2P1 (1UL << 38)
#define HWCAP2_SME_I16I32 (1UL << 39)
#define HWCAP2_SME_BI32I32 (1UL << 40)
#define HWCAP2_SME_B16B16 (1UL << 41)
#define HWCAP2_SME_F16F16 (1UL << 42)
#endif /* _UAPI__ASM_HWCAP_H */

27
arch/arm64/include/uapi/asm/sigcontext.h
View File

@ -144,6 +144,14 @@ struct sve_context {
#define SVE_SIG_FLAG_SM 0x1 /* Context describes streaming mode */
/* TPIDR2_EL0 context */
#define TPIDR2_MAGIC 0x54504902
struct tpidr2_context {
struct _aarch64_ctx head;
__u64 tpidr2;
};
#define ZA_MAGIC 0x54366345
struct za_context {
@ -152,6 +160,14 @@ struct za_context {
__u16 __reserved[3];
};
#define ZT_MAGIC 0x5a544e01
struct zt_context {
struct _aarch64_ctx head;
__u16 nregs;
__u16 __reserved[3];
};
#endif /* !__ASSEMBLY__ */
#include <asm/sve_context.h>
@ -304,4 +320,15 @@ struct za_context {
#define ZA_SIG_CONTEXT_SIZE(vq) \
(ZA_SIG_REGS_OFFSET + ZA_SIG_REGS_SIZE(vq))
#define ZT_SIG_REG_SIZE 512
#define ZT_SIG_REG_BYTES (ZT_SIG_REG_SIZE / 8)
#define ZT_SIG_REGS_OFFSET sizeof(struct zt_context)
#define ZT_SIG_REGS_SIZE(n) (ZT_SIG_REG_BYTES * n)
#define ZT_SIG_CONTEXT_SIZE(n) \
(sizeof(struct zt_context) + ZT_SIG_REGS_SIZE(n))
#endif /* _UAPI__ASM_SIGCONTEXT_H */

4
arch/arm64/kernel/asm-offsets.c
View File

@ -9,6 +9,7 @@
#include <linux/arm_sdei.h>
#include <linux/sched.h>
#include <linux/ftrace.h>
#include <linux/kexec.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
@ -193,6 +194,9 @@ int main(void)
DEFINE(KIMAGE_HEAD, offsetof(struct kimage, head));
DEFINE(KIMAGE_START, offsetof(struct kimage, start));
BLANK();
#endif
#ifdef CONFIG_FUNCTION_TRACER
DEFINE(FTRACE_OPS_FUNC, offsetof(struct ftrace_ops, func));
#endif
return 0;
}

114
arch/arm64/kernel/cpufeature.c
View File

@ -65,6 +65,7 @@
#include <linux/bsearch.h>
#include <linux/cpumask.h>
#include <linux/crash_dump.h>
#include <linux/kstrtox.h>
#include <linux/sort.h>
#include <linux/stop_machine.h>
#include <linux/sysfs.h>
@ -282,16 +283,26 @@ static const struct arm64_ftr_bits ftr_id_aa64zfr0[] = {
static const struct arm64_ftr_bits ftr_id_aa64smfr0[] = {
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_FA64_SHIFT, 1, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_SMEver_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_I16I64_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_F64F64_SHIFT, 1, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_I16I32_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_B16B16_SHIFT, 1, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_F16F16_SHIFT, 1, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_I8I32_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_F16F32_SHIFT, 1, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_B16F32_SHIFT, 1, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_BI32I32_SHIFT, 1, 0),
ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_SME),
FTR_STRICT, FTR_EXACT, ID_AA64SMFR0_EL1_F32F32_SHIFT, 1, 0),
ARM64_FTR_END,
@ -444,8 +455,8 @@ static const struct arm64_ftr_bits ftr_mvfr0[] = {
static const struct arm64_ftr_bits ftr_mvfr1[] = {
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, MVFR1_EL1_SIMDFMAC_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, MVFR1_EL1_FPHP_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, MVFR1_EL1_SIMDHP_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, MVFR1_EL1_FPHP_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, MVFR1_EL1_SIMDHP_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, MVFR1_EL1_SIMDSP_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, MVFR1_EL1_SIMDInt_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, MVFR1_EL1_SIMDLS_SHIFT, 4, 0),
@ -529,12 +540,12 @@ static const struct arm64_ftr_bits ftr_id_mmfr5[] = {
};
static const struct arm64_ftr_bits ftr_id_isar6[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_I8MM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_BF16_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_I8MM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_BF16_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_SPECRES_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_SB_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_FHM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_DP_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_SB_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_FHM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_DP_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_EL1_JSCVT_SHIFT, 4, 0),
ARM64_FTR_END,
};
@ -562,7 +573,7 @@ static const struct arm64_ftr_bits ftr_id_pfr1[] = {
};
static const struct arm64_ftr_bits ftr_id_pfr2[] = {
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_PFR2_EL1_SSBS_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_PFR2_EL1_SSBS_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_PFR2_EL1_CSV3_SHIFT, 4, 0),
ARM64_FTR_END,
};
@ -1795,7 +1806,7 @@ kpti_install_ng_mappings(const struct arm64_cpu_capabilities *__unused)
static int __init parse_kpti(char *str)
{
bool enabled;
int ret = strtobool(str, &enabled);
int ret = kstrtobool(str, &enabled);
if (ret)
return ret;
@ -2039,14 +2050,50 @@ static bool enable_pseudo_nmi;
static int __init early_enable_pseudo_nmi(char *p)
{
return strtobool(p, &enable_pseudo_nmi);
return kstrtobool(p, &enable_pseudo_nmi);
}
early_param("irqchip.gicv3_pseudo_nmi", early_enable_pseudo_nmi);
static bool can_use_gic_priorities(const struct arm64_cpu_capabilities *entry,
int scope)
{
return enable_pseudo_nmi && has_useable_gicv3_cpuif(entry, scope);
/*
* ARM64_HAS_GIC_CPUIF_SYSREGS has a lower index, and is a boot CPU
* feature, so will be detected earlier.
*/
BUILD_BUG_ON(ARM64_HAS_GIC_PRIO_MASKING <= ARM64_HAS_GIC_CPUIF_SYSREGS);
if (!cpus_have_cap(ARM64_HAS_GIC_CPUIF_SYSREGS))
return false;
return enable_pseudo_nmi;
}
static bool has_gic_prio_relaxed_sync(const struct arm64_cpu_capabilities *entry,
int scope)
{
/*
* If we're not using priority masking then we won't be poking PMR_EL1,
* and there's no need to relax synchronization of writes to it, and
* ICC_CTLR_EL1 might not be accessible and we must avoid reads from
* that.
*
* ARM64_HAS_GIC_PRIO_MASKING has a lower index, and is a boot CPU
* feature, so will be detected earlier.
*/
BUILD_BUG_ON(ARM64_HAS_GIC_PRIO_RELAXED_SYNC <= ARM64_HAS_GIC_PRIO_MASKING);
if (!cpus_have_cap(ARM64_HAS_GIC_PRIO_MASKING))
return false;
/*
* When Priority Mask Hint Enable (PMHE) == 0b0, PMR is not used as a
* hint for interrupt distribution, a DSB is not necessary when
* unmasking IRQs via PMR, and we can relax the barrier to a NOP.
*
* Linux itself doesn't use 1:N distribution, so has no need to
* set PMHE. The only reason to have it set is if EL3 requires it
* (and we can't change it).
*/
return (gic_read_ctlr() & ICC_CTLR_EL1_PMHE_MASK) == 0;
}
#endif
@ -2142,7 +2189,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
},
{
.desc = "GIC system register CPU interface",
.capability = ARM64_HAS_SYSREG_GIC_CPUIF,
.capability = ARM64_HAS_GIC_CPUIF_SYSREGS,
.type = ARM64_CPUCAP_STRICT_BOOT_CPU_FEATURE,
.matches = has_useable_gicv3_cpuif,
.sys_reg = SYS_ID_AA64PFR0_EL1,
@ -2534,14 +2581,17 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
* Depends on having GICv3
*/
.desc = "IRQ priority masking",
.capability = ARM64_HAS_IRQ_PRIO_MASKING,
.capability = ARM64_HAS_GIC_PRIO_MASKING,
.type = ARM64_CPUCAP_STRICT_BOOT_CPU_FEATURE,
.matches = can_use_gic_priorities,
.sys_reg = SYS_ID_AA64PFR0_EL1,
.field_pos = ID_AA64PFR0_EL1_GIC_SHIFT,
.field_width = 4,
.sign = FTR_UNSIGNED,
.min_field_value = 1,
},
{
/*
* Depends on ARM64_HAS_GIC_PRIO_MASKING
*/
.capability = ARM64_HAS_GIC_PRIO_RELAXED_SYNC,
.type = ARM64_CPUCAP_STRICT_BOOT_CPU_FEATURE,
.matches = has_gic_prio_relaxed_sync,
},
#endif
#ifdef CONFIG_ARM64_E0PD
@ -2649,6 +2699,18 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.matches = has_cpuid_feature,
.cpu_enable = fa64_kernel_enable,
},
{
.desc = "SME2",
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.capability = ARM64_SME2,
.sys_reg = SYS_ID_AA64PFR1_EL1,
.sign = FTR_UNSIGNED,
.field_pos = ID_AA64PFR1_EL1_SME_SHIFT,
.field_width = ID_AA64PFR1_EL1_SME_WIDTH,
.min_field_value = ID_AA64PFR1_EL1_SME_SME2,
.matches = has_cpuid_feature,
.cpu_enable = sme2_kernel_enable,
},
#endif /* CONFIG_ARM64_SME */
{
.desc = "WFx with timeout",
@ -2777,7 +2839,7 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_EL1_FP_SHIFT, 4, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_FPHP),
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_EL1_AdvSIMD_SHIFT, 4, FTR_SIGNED, 0, CAP_HWCAP, KERNEL_HWCAP_ASIMD),
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_EL1_AdvSIMD_SHIFT, 4, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_ASIMDHP),
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_EL1_DIT_SHIFT, 4, FTR_SIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DIT),
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_EL1_DIT_SHIFT, 4, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DIT),
HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_EL1_DPB_SHIFT, 4, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_DCPOP),
HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_EL1_DPB_SHIFT, 4, FTR_UNSIGNED, 2, CAP_HWCAP, KERNEL_HWCAP_DCPODP),
HWCAP_CAP(SYS_ID_AA64ISAR1_EL1, ID_AA64ISAR1_EL1_JSCVT_SHIFT, 4, FTR_UNSIGNED, 1, CAP_HWCAP, KERNEL_HWCAP_JSCVT),
@ -2827,11 +2889,17 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
#ifdef CONFIG_ARM64_SME
HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_EL1_SME_SHIFT, 4, FTR_UNSIGNED, ID_AA64PFR1_EL1_SME_IMP, CAP_HWCAP, KERNEL_HWCAP_SME),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_FA64_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_FA64_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_FA64),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_SMEver_SHIFT, 4, FTR_UNSIGNED, ID_AA64SMFR0_EL1_SMEver_SME2p1, CAP_HWCAP, KERNEL_HWCAP_SME2P1),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_SMEver_SHIFT, 4, FTR_UNSIGNED, ID_AA64SMFR0_EL1_SMEver_SME2, CAP_HWCAP, KERNEL_HWCAP_SME2),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_I16I64_SHIFT, 4, FTR_UNSIGNED, ID_AA64SMFR0_EL1_I16I64_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_I16I64),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_F64F64_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_F64F64_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_F64F64),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_I16I32_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_I16I32_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_I16I32),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_B16B16_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_B16B16_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_B16B16),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_F16F16_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_F16F16_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_F16F16),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_I8I32_SHIFT, 4, FTR_UNSIGNED, ID_AA64SMFR0_EL1_I8I32_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_I8I32),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_F16F32_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_F16F32_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_F16F32),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_B16F32_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_B16F32_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_B16F32),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_BI32I32_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_BI32I32_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_BI32I32),
HWCAP_CAP(SYS_ID_AA64SMFR0_EL1, ID_AA64SMFR0_EL1_F32F32_SHIFT, 1, FTR_UNSIGNED, ID_AA64SMFR0_EL1_F32F32_IMP, CAP_HWCAP, KERNEL_HWCAP_SME_F32F32),
#endif /* CONFIG_ARM64_SME */
{},
@ -2866,11 +2934,19 @@ static const struct arm64_cpu_capabilities compat_elf_hwcaps[] = {
/* Arm v8 mandates MVFR0.FPDP == {0, 2}. So, piggy back on this for the presence of VFP support */
HWCAP_CAP(SYS_MVFR0_EL1, MVFR0_EL1_FPDP_SHIFT, 4, FTR_UNSIGNED, 2, CAP_COMPAT_HWCAP, COMPAT_HWCAP_VFP),
HWCAP_CAP(SYS_MVFR0_EL1, MVFR0_EL1_FPDP_SHIFT, 4, FTR_UNSIGNED, 2, CAP_COMPAT_HWCAP, COMPAT_HWCAP_VFPv3),
HWCAP_CAP(SYS_MVFR1_EL1, MVFR1_EL1_FPHP_SHIFT, 4, FTR_UNSIGNED, 3, CAP_COMPAT_HWCAP, COMPAT_HWCAP_FPHP),
HWCAP_CAP(SYS_MVFR1_EL1, MVFR1_EL1_SIMDHP_SHIFT, 4, FTR_UNSIGNED, 2, CAP_COMPAT_HWCAP, COMPAT_HWCAP_ASIMDHP),
HWCAP_CAP(SYS_ID_ISAR5_EL1, ID_ISAR5_EL1_AES_SHIFT, 4, FTR_UNSIGNED, 2, CAP_COMPAT_HWCAP2, COMPAT_HWCAP2_PMULL),
HWCAP_CAP(SYS_ID_ISAR5_EL1, ID_ISAR5_EL1_AES_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP2, COMPAT_HWCAP2_AES),
HWCAP_CAP(SYS_ID_ISAR5_EL1, ID_ISAR5_EL1_SHA1_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP2, COMPAT_HWCAP2_SHA1),
HWCAP_CAP(SYS_ID_ISAR5_EL1, ID_ISAR5_EL1_SHA2_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP2, COMPAT_HWCAP2_SHA2),
HWCAP_CAP(SYS_ID_ISAR5_EL1, ID_ISAR5_EL1_CRC32_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP2, COMPAT_HWCAP2_CRC32),
HWCAP_CAP(SYS_ID_ISAR6_EL1, ID_ISAR6_EL1_DP_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP, COMPAT_HWCAP_ASIMDDP),
HWCAP_CAP(SYS_ID_ISAR6_EL1, ID_ISAR6_EL1_FHM_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP, COMPAT_HWCAP_ASIMDFHM),
HWCAP_CAP(SYS_ID_ISAR6_EL1, ID_ISAR6_EL1_SB_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP2, COMPAT_HWCAP2_SB),
HWCAP_CAP(SYS_ID_ISAR6_EL1, ID_ISAR6_EL1_BF16_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP, COMPAT_HWCAP_ASIMDBF16),
HWCAP_CAP(SYS_ID_ISAR6_EL1, ID_ISAR6_EL1_I8MM_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP, COMPAT_HWCAP_I8MM),
HWCAP_CAP(SYS_ID_PFR2_EL1, ID_PFR2_EL1_SSBS_SHIFT, 4, FTR_UNSIGNED, 1, CAP_COMPAT_HWCAP2, COMPAT_HWCAP2_SSBS),
#endif
{},
};

14
arch/arm64/kernel/cpuinfo.c
View File

@ -119,6 +119,12 @@ static const char *const hwcap_str[] = {
[KERNEL_HWCAP_CSSC] = "cssc",
[KERNEL_HWCAP_RPRFM] = "rprfm",
[KERNEL_HWCAP_SVE2P1] = "sve2p1",
[KERNEL_HWCAP_SME2] = "sme2",
[KERNEL_HWCAP_SME2P1] = "sme2p1",
[KERNEL_HWCAP_SME_I16I32] = "smei16i32",
[KERNEL_HWCAP_SME_BI32I32] = "smebi32i32",
[KERNEL_HWCAP_SME_B16B16] = "smeb16b16",
[KERNEL_HWCAP_SME_F16F16] = "smef16f16",
};
#ifdef CONFIG_COMPAT
@ -146,6 +152,12 @@ static const char *const compat_hwcap_str[] = {
[COMPAT_KERNEL_HWCAP(VFPD32)] = NULL, /* Not possible on arm64 */
[COMPAT_KERNEL_HWCAP(LPAE)] = "lpae",
[COMPAT_KERNEL_HWCAP(EVTSTRM)] = "evtstrm",
[COMPAT_KERNEL_HWCAP(FPHP)] = "fphp",
[COMPAT_KERNEL_HWCAP(ASIMDHP)] = "asimdhp",
[COMPAT_KERNEL_HWCAP(ASIMDDP)] = "asimddp",
[COMPAT_KERNEL_HWCAP(ASIMDFHM)] = "asimdfhm",
[COMPAT_KERNEL_HWCAP(ASIMDBF16)] = "asimdbf16",
[COMPAT_KERNEL_HWCAP(I8MM)] = "i8mm",
};
#define COMPAT_KERNEL_HWCAP2(x) const_ilog2(COMPAT_HWCAP2_ ## x)
@ -155,6 +167,8 @@ static const char *const compat_hwcap2_str[] = {
[COMPAT_KERNEL_HWCAP2(SHA1)] = "sha1",
[COMPAT_KERNEL_HWCAP2(SHA2)] = "sha2",
[COMPAT_KERNEL_HWCAP2(CRC32)] = "crc32",
[COMPAT_KERNEL_HWCAP2(SB)] = "sb",
[COMPAT_KERNEL_HWCAP2(SSBS)] = "ssbs",
};
#endif /* CONFIG_COMPAT */

30
arch/arm64/kernel/entry-fpsimd.S
View File

@ -100,25 +100,35 @@ SYM_FUNC_START(sme_set_vq)
SYM_FUNC_END(sme_set_vq)
/*
* Save the SME state
* Save the ZA and ZT state
*
* x0 - pointer to buffer for state
* x1 - number of ZT registers to save
*/
SYM_FUNC_START(za_save_state)
_sme_rdsvl 1, 1 // x1 = VL/8
sme_save_za 0, x1, 12
SYM_FUNC_START(sme_save_state)
_sme_rdsvl 2, 1 // x2 = VL/8
sme_save_za 0, x2, 12 // Leaves x0 pointing to the end of ZA
cbz x1, 1f
_str_zt 0
1:
ret
SYM_FUNC_END(za_save_state)
SYM_FUNC_END(sme_save_state)
/*
* Load the SME state
* Load the ZA and ZT state
*
* x0 - pointer to buffer for state
* x1 - number of ZT registers to save
*/
SYM_FUNC_START(za_load_state)
_sme_rdsvl 1, 1 // x1 = VL/8
sme_load_za 0, x1, 12
SYM_FUNC_START(sme_load_state)
_sme_rdsvl 2, 1 // x2 = VL/8
sme_load_za 0, x2, 12 // Leaves x0 pointing to the end of ZA
cbz x1, 1f
_ldr_zt 0
1:
ret
SYM_FUNC_END(za_load_state)
SYM_FUNC_END(sme_load_state)
#endif /* CONFIG_ARM64_SME */

32
arch/arm64/kernel/entry-ftrace.S
View File

@ -65,13 +65,35 @@ SYM_CODE_START(ftrace_caller)
stp x29, x30, [sp, #FREGS_SIZE]
add x29, sp, #FREGS_SIZE
sub x0, x30, #AARCH64_INSN_SIZE // ip (callsite's BL insn)
mov x1, x9 // parent_ip (callsite's LR)
ldr_l x2, function_trace_op // op
mov x3, sp // regs
/* Prepare arguments for the the tracer func */
sub x0, x30, #AARCH64_INSN_SIZE // ip (callsite's BL insn)
mov x1, x9 // parent_ip (callsite's LR)
mov x3, sp // regs
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS
/*
* The literal pointer to the ops is at an 8-byte aligned boundary
* which is either 12 or 16 bytes before the BL instruction in the call
* site. See ftrace_call_adjust() for details.
*
* Therefore here the LR points at `literal + 16` or `literal + 20`,
* and we can find the address of the literal in either case by
* aligning to an 8-byte boundary and subtracting 16. We do the
* alignment first as this allows us to fold the subtraction into the
* LDR.
*/
bic x2, x30, 0x7
ldr x2, [x2, #-16] // op
ldr x4, [x2, #FTRACE_OPS_FUNC] // op->func
blr x4 // op->func(ip, parent_ip, op, regs)
#else
ldr_l x2, function_trace_op // op
SYM_INNER_LABEL(ftrace_call, SYM_L_GLOBAL)
bl ftrace_stub
bl ftrace_stub // func(ip, parent_ip, op, regs)
#endif
/*
* At the callsite x0-x8 and x19-x30 were live. Any C code will have preserved

41
arch/arm64/kernel/entry.S
View File

@ -275,7 +275,7 @@ alternative_if ARM64_HAS_ADDRESS_AUTH
alternative_else_nop_endif
1:
scs_load tsk
scs_load_current
.else
add x21, sp, #PT_REGS_SIZE
get_current_task tsk
@ -311,13 +311,16 @@ alternative_else_nop_endif
.endif
#ifdef CONFIG_ARM64_PSEUDO_NMI
/* Save pmr */
alternative_if ARM64_HAS_IRQ_PRIO_MASKING
alternative_if_not ARM64_HAS_GIC_PRIO_MASKING
b .Lskip_pmr_save\@
alternative_else_nop_endif
mrs_s x20, SYS_ICC_PMR_EL1
str x20, [sp, #S_PMR_SAVE]
mov x20, #GIC_PRIO_IRQON | GIC_PRIO_PSR_I_SET
msr_s SYS_ICC_PMR_EL1, x20
alternative_else_nop_endif
.Lskip_pmr_save\@:
#endif
/*
@ -336,15 +339,19 @@ alternative_else_nop_endif
.endif
#ifdef CONFIG_ARM64_PSEUDO_NMI
/* Restore pmr */
alternative_if ARM64_HAS_IRQ_PRIO_MASKING
alternative_if_not ARM64_HAS_GIC_PRIO_MASKING
b .Lskip_pmr_restore\@
alternative_else_nop_endif
ldr x20, [sp, #S_PMR_SAVE]
msr_s SYS_ICC_PMR_EL1, x20
mrs_s x21, SYS_ICC_CTLR_EL1
tbz x21, #6, .L__skip_pmr_sync\@ // Check for ICC_CTLR_EL1.PMHE
dsb sy // Ensure priority change is seen by redistributor
.L__skip_pmr_sync\@:
/* Ensure priority change is seen by redistributor */
alternative_if_not ARM64_HAS_GIC_PRIO_RELAXED_SYNC
dsb sy
alternative_else_nop_endif
.Lskip_pmr_restore\@:
#endif
ldp x21, x22, [sp, #S_PC] // load ELR, SPSR
@ -848,7 +855,7 @@ SYM_FUNC_START(cpu_switch_to)
msr sp_el0, x1
ptrauth_keys_install_kernel x1, x8, x9, x10
scs_save x0
scs_load x1
scs_load_current
ret
SYM_FUNC_END(cpu_switch_to)
NOKPROBE(cpu_switch_to)
@ -876,19 +883,19 @@ NOKPROBE(ret_from_fork)
*/
SYM_FUNC_START(call_on_irq_stack)
#ifdef CONFIG_SHADOW_CALL_STACK
stp scs_sp, xzr, [sp, #-16]!
get_current_task x16
scs_save x16
ldr_this_cpu scs_sp, irq_shadow_call_stack_ptr, x17
#endif
/* Create a frame record to save our LR and SP (implicit in FP) */
stp x29, x30, [sp, #-16]!
mov x29, sp
ldr_this_cpu x16, irq_stack_ptr, x17
mov x15, #IRQ_STACK_SIZE
add x16, x16, x15
/* Move to the new stack and call the function there */
mov sp, x16
add sp, x16, #IRQ_STACK_SIZE
blr x1
/*
@ -897,9 +904,7 @@ SYM_FUNC_START(call_on_irq_stack)
*/
mov sp, x29
ldp x29, x30, [sp], #16
#ifdef CONFIG_SHADOW_CALL_STACK
ldp scs_sp, xzr, [sp], #16
#endif
scs_load_current
ret
SYM_FUNC_END(call_on_irq_stack)
NOKPROBE(call_on_irq_stack)

52
arch/arm64/kernel/fpsimd.c
View File

@ -299,7 +299,7 @@ void task_set_vl_onexec(struct task_struct *task, enum vec_type type,
/*
* TIF_SME controls whether a task can use SME without trapping while
* in userspace, when TIF_SME is set then we must have storage
* alocated in sve_state and za_state to store the contents of both ZA
* alocated in sve_state and sme_state to store the contents of both ZA
* and the SVE registers for both streaming and non-streaming modes.
*
* If both SVCR.ZA and SVCR.SM are disabled then at any point we
@ -429,7 +429,8 @@ static void task_fpsimd_load(void)
write_sysreg_s(current->thread.svcr, SYS_SVCR);
if (thread_za_enabled(&current->thread))
za_load_state(current->thread.za_state);
sme_load_state(current->thread.sme_state,
system_supports_sme2());
if (thread_sm_enabled(&current->thread))
restore_ffr = system_supports_fa64();
@ -490,7 +491,8 @@ static void fpsimd_save(void)
*svcr = read_sysreg_s(SYS_SVCR);
if (*svcr & SVCR_ZA_MASK)
za_save_state(last->za_state);
sme_save_state(last->sme_state,
system_supports_sme2());
/* If we are in streaming mode override regular SVE. */
if (*svcr & SVCR_SM_MASK) {
@ -1257,30 +1259,30 @@ void fpsimd_release_task(struct task_struct *dead_task)
#ifdef CONFIG_ARM64_SME
/*
* Ensure that task->thread.za_state is allocated and sufficiently large.
* Ensure that task->thread.sme_state is allocated and sufficiently large.
*
* This function should be used only in preparation for replacing
* task->thread.za_state with new data. The memory is always zeroed
* task->thread.sme_state with new data. The memory is always zeroed
* here to prevent stale data from showing through: this is done in
* the interest of testability and predictability, the architecture
* guarantees that when ZA is enabled it will be zeroed.
*/
void sme_alloc(struct task_struct *task)
{
if (task->thread.za_state) {
memset(task->thread.za_state, 0, za_state_size(task));
if (task->thread.sme_state) {
memset(task->thread.sme_state, 0, sme_state_size(task));
return;
}
/* This could potentially be up to 64K. */
task->thread.za_state =
kzalloc(za_state_size(task), GFP_KERNEL);
task->thread.sme_state =
kzalloc(sme_state_size(task), GFP_KERNEL);
}
static void sme_free(struct task_struct *task)
{
kfree(task->thread.za_state);
task->thread.za_state = NULL;
kfree(task->thread.sme_state);
task->thread.sme_state = NULL;
}
void sme_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
@ -1298,6 +1300,17 @@ void sme_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
isb();
}
/*
* This must be called after sme_kernel_enable(), we rely on the
* feature table being sorted to ensure this.
*/
void sme2_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
{
/* Allow use of ZT0 */
write_sysreg_s(read_sysreg_s(SYS_SMCR_EL1) | SMCR_ELx_EZT0_MASK,
SYS_SMCR_EL1);
}
/*
* This must be called after sme_kernel_enable(), we rely on the
* feature table being sorted to ensure this.
@ -1322,7 +1335,6 @@ u64 read_smcr_features(void)
unsigned int vq_max;
sme_kernel_enable(NULL);
sme_smstart_sm();
/*
* Set the maximum possible VL.
@ -1332,11 +1344,9 @@ u64 read_smcr_features(void)
smcr = read_sysreg_s(SYS_SMCR_EL1);
smcr &= ~(u64)SMCR_ELx_LEN_MASK; /* Only the LEN field */
vq_max = sve_vq_from_vl(sve_get_vl());
vq_max = sve_vq_from_vl(sme_get_vl());
smcr |= vq_max - 1; /* set LEN field to maximum effective value */
sme_smstop_sm();
return smcr;
}
@ -1488,7 +1498,7 @@ void do_sme_acc(unsigned long esr, struct pt_regs *regs)
sve_alloc(current, false);
sme_alloc(current);
if (!current->thread.sve_state || !current->thread.za_state) {
if (!current->thread.sve_state || !current->thread.sme_state) {
force_sig(SIGKILL);
return;
}
@ -1609,7 +1619,7 @@ static void fpsimd_flush_thread_vl(enum vec_type type)
void fpsimd_flush_thread(void)
{
void *sve_state = NULL;
void *za_state = NULL;
void *sme_state = NULL;
if (!system_supports_fpsimd())
return;
@ -1634,8 +1644,8 @@ void fpsimd_flush_thread(void)
clear_thread_flag(TIF_SME);
/* Defer kfree() while in atomic context */
za_state = current->thread.za_state;
current->thread.za_state = NULL;
sme_state = current->thread.sme_state;
current->thread.sme_state = NULL;
fpsimd_flush_thread_vl(ARM64_VEC_SME);
current->thread.svcr = 0;
@ -1645,7 +1655,7 @@ void fpsimd_flush_thread(void)
put_cpu_fpsimd_context();
kfree(sve_state);
kfree(za_state);
kfree(sme_state);
}
/*
@ -1711,7 +1721,7 @@ static void fpsimd_bind_task_to_cpu(void)
WARN_ON(!system_supports_fpsimd());
last->st = &current->thread.uw.fpsimd_state;
last->sve_state = current->thread.sve_state;
last->za_state = current->thread.za_state;
last->sme_state = current->thread.sme_state;
last->sve_vl = task_get_sve_vl(current);
last->sme_vl = task_get_sme_vl(current);
last->svcr = &current->thread.svcr;

158
arch/arm64/kernel/ftrace.c
View File

@ -60,6 +60,89 @@ int ftrace_regs_query_register_offset(const char *name)
}
#endif
unsigned long ftrace_call_adjust(unsigned long addr)
{
/*
* When using mcount, addr is the address of the mcount call
* instruction, and no adjustment is necessary.
*/
if (!IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_ARGS))
return addr;
/*
* When using patchable-function-entry without pre-function NOPS, addr
* is the address of the first NOP after the function entry point.
*
* The compiler has either generated:
*
* addr+00: func: NOP // To be patched to MOV X9, LR
* addr+04: NOP // To be patched to BL <caller>
*
* Or:
*
* addr-04: BTI C
* addr+00: func: NOP // To be patched to MOV X9, LR
* addr+04: NOP // To be patched to BL <caller>
*
* We must adjust addr to the address of the NOP which will be patched
* to `BL <caller>`, which is at `addr + 4` bytes in either case.
*
*/
if (!IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS))
return addr + AARCH64_INSN_SIZE;
/*
* When using patchable-function-entry with pre-function NOPs, addr is
* the address of the first pre-function NOP.
*
* Starting from an 8-byte aligned base, the compiler has either
* generated:
*
* addr+00: NOP // Literal (first 32 bits)
* addr+04: NOP // Literal (last 32 bits)
* addr+08: func: NOP // To be patched to MOV X9, LR
* addr+12: NOP // To be patched to BL <caller>
*
* Or:
*
* addr+00: NOP // Literal (first 32 bits)
* addr+04: NOP // Literal (last 32 bits)
* addr+08: func: BTI C
* addr+12: NOP // To be patched to MOV X9, LR
* addr+16: NOP // To be patched to BL <caller>
*
* We must adjust addr to the address of the NOP which will be patched
* to `BL <caller>`, which is at either addr+12 or addr+16 depending on
* whether there is a BTI.
*/
if (!IS_ALIGNED(addr, sizeof(unsigned long))) {
WARN_RATELIMIT(1, "Misaligned patch-site %pS\n",
(void *)(addr + 8));
return 0;
}
/* Skip the NOPs placed before the function entry point */
addr += 2 * AARCH64_INSN_SIZE;
/* Skip any BTI */
if (IS_ENABLED(CONFIG_ARM64_BTI_KERNEL)) {
u32 insn = le32_to_cpu(*(__le32 *)addr);
if (aarch64_insn_is_bti(insn)) {
addr += AARCH64_INSN_SIZE;
} else if (insn != aarch64_insn_gen_nop()) {
WARN_RATELIMIT(1, "unexpected insn in patch-site %pS: 0x%08x\n",
(void *)addr, insn);
}
}
/* Skip the first NOP after function entry */
addr += AARCH64_INSN_SIZE;
return addr;
}
/*
* Replace a single instruction, which may be a branch or NOP.
* If @validate == true, a replaced instruction is checked against 'old'.
@ -98,6 +181,13 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
unsigned long pc;
u32 new;
/*
* When using CALL_OPS, the function to call is associated with the
* call site, and we don't have a global function pointer to update.
*/
if (IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS))
return 0;
pc = (unsigned long)ftrace_call;
new = aarch64_insn_gen_branch_imm(pc, (unsigned long)func,
AARCH64_INSN_BRANCH_LINK);
@ -176,6 +266,44 @@ static bool ftrace_find_callable_addr(struct dyn_ftrace *rec,
return true;
}
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS
static const struct ftrace_ops *arm64_rec_get_ops(struct dyn_ftrace *rec)
{
const struct ftrace_ops *ops = NULL;
if (rec->flags & FTRACE_FL_CALL_OPS_EN) {
ops = ftrace_find_unique_ops(rec);
WARN_ON_ONCE(!ops);
}
if (!ops)
ops = &ftrace_list_ops;
return ops;
}
static int ftrace_rec_set_ops(const struct dyn_ftrace *rec,
const struct ftrace_ops *ops)
{
unsigned long literal = ALIGN_DOWN(rec->ip - 12, 8);
return aarch64_insn_write_literal_u64((void *)literal,
(unsigned long)ops);
}
static int ftrace_rec_set_nop_ops(struct dyn_ftrace *rec)
{
return ftrace_rec_set_ops(rec, &ftrace_nop_ops);
}
static int ftrace_rec_update_ops(struct dyn_ftrace *rec)
{
return ftrace_rec_set_ops(rec, arm64_rec_get_ops(rec));
}
#else
static int ftrace_rec_set_nop_ops(struct dyn_ftrace *rec) { return 0; }
static int ftrace_rec_update_ops(struct dyn_ftrace *rec) { return 0; }
#endif
/*
* Turn on the call to ftrace_caller() in instrumented function
*/
@ -183,6 +311,11 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
unsigned long pc = rec->ip;
u32 old, new;
int ret;
ret = ftrace_rec_update_ops(rec);
if (ret)
return ret;
if (!ftrace_find_callable_addr(rec, NULL, &addr))
return -EINVAL;
@ -193,6 +326,19 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
return ftrace_modify_code(pc, old, new, true);
}
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS
int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
unsigned long addr)
{
if (WARN_ON_ONCE(old_addr != (unsigned long)ftrace_caller))
return -EINVAL;
if (WARN_ON_ONCE(addr != (unsigned long)ftrace_caller))
return -EINVAL;
return ftrace_rec_update_ops(rec);
}
#endif
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS
/*
* The compiler has inserted two NOPs before the regular function prologue.
@ -209,7 +355,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
* | NOP | MOV X9, LR | MOV X9, LR |
* | NOP | NOP | BL <entry> |
*
* The LR value will be recovered by ftrace_regs_entry, and restored into LR
* The LR value will be recovered by ftrace_caller, and restored into LR
* before returning to the regular function prologue. When a function is not
* being traced, the MOV is not harmful given x9 is not live per the AAPCS.
*
@ -220,6 +366,11 @@ int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
{
unsigned long pc = rec->ip - AARCH64_INSN_SIZE;
u32 old, new;
int ret;
ret = ftrace_rec_set_nop_ops(rec);
if (ret)
return ret;
old = aarch64_insn_gen_nop();
new = aarch64_insn_gen_move_reg(AARCH64_INSN_REG_9,
@ -237,9 +388,14 @@ int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
{
unsigned long pc = rec->ip;
u32 old = 0, new;
int ret;
new = aarch64_insn_gen_nop();
ret = ftrace_rec_set_nop_ops(rec);
if (ret)
return ret;
/*
* When using mcount, callsites in modules may have been initalized to
* call an arbitrary module PLT (which redirects to the _mcount stub)

112
arch/arm64/kernel/head.S
View File

@ -70,13 +70,14 @@
__EFI_PE_HEADER
__INIT
.section ".idmap.text","awx"
/*
* The following callee saved general purpose registers are used on the
* primary lowlevel boot path:
*
* Register Scope Purpose
* x19 primary_entry() .. start_kernel() whether we entered with the MMU on
* x20 primary_entry() .. __primary_switch() CPU boot mode
* x21 primary_entry() .. start_kernel() FDT pointer passed at boot in x0
* x22 create_idmap() .. start_kernel() ID map VA of the DT blob
@ -86,10 +87,22 @@
* x28 create_idmap() callee preserved temp register
*/
SYM_CODE_START(primary_entry)
bl record_mmu_state
bl preserve_boot_args
bl create_idmap
/*
* If we entered with the MMU and caches on, clean the ID mapped part
* of the primary boot code to the PoC so we can safely execute it with
* the MMU off.
*/
cbz x19, 0f
adrp x0, __idmap_text_start
adr_l x1, __idmap_text_end
bl dcache_clean_poc
0: mov x0, x19
bl init_kernel_el // w0=cpu_boot_mode
mov x20, x0
bl create_idmap
/*
* The following calls CPU setup code, see arch/arm64/mm/proc.S for
@ -109,6 +122,40 @@ SYM_CODE_START(primary_entry)
b __primary_switch
SYM_CODE_END(primary_entry)
__INIT
SYM_CODE_START_LOCAL(record_mmu_state)
mrs x19, CurrentEL
cmp x19, #CurrentEL_EL2
mrs x19, sctlr_el1
b.ne 0f
mrs x19, sctlr_el2
0:
CPU_LE( tbnz x19, #SCTLR_ELx_EE_SHIFT, 1f )
CPU_BE( tbz x19, #SCTLR_ELx_EE_SHIFT, 1f )
tst x19, #SCTLR_ELx_C // Z := (C == 0)
and x19, x19, #SCTLR_ELx_M // isolate M bit
csel x19, xzr, x19, eq // clear x19 if Z
ret
/*
* Set the correct endianness early so all memory accesses issued
* before init_kernel_el() occur in the correct byte order. Note that
* this means the MMU must be disabled, or the active ID map will end
* up getting interpreted with the wrong byte order.
*/
1: eor x19, x19, #SCTLR_ELx_EE
bic x19, x19, #SCTLR_ELx_M
b.ne 2f
pre_disable_mmu_workaround
msr sctlr_el2, x19
b 3f
pre_disable_mmu_workaround
2: msr sctlr_el1, x19
3: isb
mov x19, xzr
ret
SYM_CODE_END(record_mmu_state)
/*
* Preserve the arguments passed by the bootloader in x0 .. x3
*/
@ -119,11 +166,14 @@ SYM_CODE_START_LOCAL(preserve_boot_args)
stp x21, x1, [x0] // x0 .. x3 at kernel entry
stp x2, x3, [x0, #16]
cbnz x19, 0f // skip cache invalidation if MMU is on
dmb sy // needed before dc ivac with
// MMU off
add x1, x0, #0x20 // 4 x 8 bytes
b dcache_inval_poc // tail call
0: str_l x19, mmu_enabled_at_boot, x0
ret
SYM_CODE_END(preserve_boot_args)
SYM_FUNC_START_LOCAL(clear_page_tables)
@ -360,12 +410,13 @@ SYM_FUNC_START_LOCAL(create_idmap)
* accesses (MMU disabled), invalidate those tables again to
* remove any speculatively loaded cache lines.
*/
cbnz x19, 0f // skip cache invalidation if MMU is on
dmb sy
adrp x0, init_idmap_pg_dir
adrp x1, init_idmap_pg_end
bl dcache_inval_poc
ret x28
0: ret x28
SYM_FUNC_END(create_idmap)
SYM_FUNC_START_LOCAL(create_kernel_mapping)
@ -404,7 +455,7 @@ SYM_FUNC_END(create_kernel_mapping)
stp xzr, xzr, [sp, #S_STACKFRAME]
add x29, sp, #S_STACKFRAME
scs_load \tsk
scs_load_current
adr_l \tmp1, __per_cpu_offset
ldr w\tmp2, [\tsk, #TSK_TI_CPU]
@ -489,14 +540,17 @@ SYM_FUNC_END(__primary_switched)
* Returns either BOOT_CPU_MODE_EL1 or BOOT_CPU_MODE_EL2 in x0 if
* booted in EL1 or EL2 respectively, with the top 32 bits containing
* potential context flags. These flags are *not* stored in __boot_cpu_mode.
*
* x0: whether we are being called from the primary boot path with the MMU on
*/
SYM_FUNC_START(init_kernel_el)
mrs x0, CurrentEL
cmp x0, #CurrentEL_EL2
mrs x1, CurrentEL
cmp x1, #CurrentEL_EL2
b.eq init_el2
SYM_INNER_LABEL(init_el1, SYM_L_LOCAL)
mov_q x0, INIT_SCTLR_EL1_MMU_OFF
pre_disable_mmu_workaround
msr sctlr_el1, x0
isb
mov_q x0, INIT_PSTATE_EL1
@ -506,6 +560,14 @@ SYM_INNER_LABEL(init_el1, SYM_L_LOCAL)
eret
SYM_INNER_LABEL(init_el2, SYM_L_LOCAL)
msr elr_el2, lr
// clean all HYP code to the PoC if we booted at EL2 with the MMU on
cbz x0, 0f
adrp x0, __hyp_idmap_text_start
adr_l x1, __hyp_text_end
bl dcache_clean_poc
0:
mov_q x0, HCR_HOST_NVHE_FLAGS
msr hcr_el2, x0
isb
@ -529,38 +591,27 @@ SYM_INNER_LABEL(init_el2, SYM_L_LOCAL)
cbz x0, 1f
/* Set a sane SCTLR_EL1, the VHE way */
pre_disable_mmu_workaround
msr_s SYS_SCTLR_EL12, x1
mov x2, #BOOT_CPU_FLAG_E2H
b 2f
1:
pre_disable_mmu_workaround
msr sctlr_el1, x1
mov x2, xzr
2:
msr elr_el2, lr
mov w0, #BOOT_CPU_MODE_EL2
orr x0, x0, x2
eret
SYM_FUNC_END(init_kernel_el)
/*
* Sets the __boot_cpu_mode flag depending on the CPU boot mode passed
* in w0. See arch/arm64/include/asm/virt.h for more info.
*/
SYM_FUNC_START_LOCAL(set_cpu_boot_mode_flag)
adr_l x1, __boot_cpu_mode
cmp w0, #BOOT_CPU_MODE_EL2
b.ne 1f
add x1, x1, #4
1: str w0, [x1] // Save CPU boot mode
ret
SYM_FUNC_END(set_cpu_boot_mode_flag)
/*
* This provides a "holding pen" for platforms to hold all secondary
* cores are held until we're ready for them to initialise.
*/
SYM_FUNC_START(secondary_holding_pen)
mov x0, xzr
bl init_kernel_el // w0=cpu_boot_mode
mrs x2, mpidr_el1
mov_q x1, MPIDR_HWID_BITMASK
@ -578,6 +629,7 @@ SYM_FUNC_END(secondary_holding_pen)
* be used where CPUs are brought online dynamically by the kernel.
*/
SYM_FUNC_START(secondary_entry)
mov x0, xzr
bl init_kernel_el // w0=cpu_boot_mode
b secondary_startup
SYM_FUNC_END(secondary_entry)
@ -587,7 +639,6 @@ SYM_FUNC_START_LOCAL(secondary_startup)
* Common entry point for secondary CPUs.
*/
mov x20, x0 // preserve boot mode
bl finalise_el2
bl __cpu_secondary_check52bitva
#if VA_BITS > 48
ldr_l x0, vabits_actual
@ -600,9 +651,14 @@ SYM_FUNC_START_LOCAL(secondary_startup)
br x8
SYM_FUNC_END(secondary_startup)
.text
SYM_FUNC_START_LOCAL(__secondary_switched)
mov x0, x20
bl set_cpu_boot_mode_flag
mov x0, x20
bl finalise_el2
str_l xzr, __early_cpu_boot_status, x3
adr_l x5, vectors
msr vbar_el1, x5
@ -628,6 +684,19 @@ SYM_FUNC_START_LOCAL(__secondary_too_slow)
b __secondary_too_slow
SYM_FUNC_END(__secondary_too_slow)
/*
* Sets the __boot_cpu_mode flag depending on the CPU boot mode passed
* in w0. See arch/arm64/include/asm/virt.h for more info.
*/
SYM_FUNC_START_LOCAL(set_cpu_boot_mode_flag)
adr_l x1, __boot_cpu_mode
cmp w0, #BOOT_CPU_MODE_EL2
b.ne 1f
add x1, x1, #4
1: str w0, [x1] // Save CPU boot mode
ret
SYM_FUNC_END(set_cpu_boot_mode_flag)
/*
* The booting CPU updates the failed status @__early_cpu_boot_status,
* with MMU turned off.
@ -659,6 +728,7 @@ SYM_FUNC_END(__secondary_too_slow)
* Checks if the selected granule size is supported by the CPU.
* If it isn't, park the CPU
*/
.section ".idmap.text","awx"
SYM_FUNC_START(__enable_mmu)
mrs x3, ID_AA64MMFR0_EL1
ubfx x3, x3, #ID_AA64MMFR0_EL1_TGRAN_SHIFT, 4

7
arch/arm64/kernel/hyp-stub.S
View File

@ -132,6 +132,13 @@ SYM_CODE_START_LOCAL(__finalise_el2)
orr x0, x0, SMCR_ELx_FA64_MASK
.Lskip_sme_fa64:
// ZT0 available?
mrs_s x1, SYS_ID_AA64SMFR0_EL1
__check_override id_aa64smfr0 ID_AA64SMFR0_EL1_SMEver_SHIFT 4 .Linit_sme_zt0 .Lskip_sme_zt0
.Linit_sme_zt0:
orr x0, x0, SMCR_ELx_EZT0_MASK
.Lskip_sme_zt0:
orr x0, x0, #SMCR_ELx_LEN_MASK // Enable full SME vector
msr_s SYS_SMCR_EL2, x0 // length for EL1.

1
arch/arm64/kernel/idreg-override.c
View File

@ -131,6 +131,7 @@ static const struct ftr_set_desc smfr0 __initconst = {
.name = "id_aa64smfr0",
.override = &id_aa64smfr0_override,
.fields = {
FIELD("smever", ID_AA64SMFR0_EL1_SMEver_SHIFT, NULL),
/* FA64 is a one bit field... :-/ */
{ "fa64", ID_AA64SMFR0_EL1_FA64_SHIFT, 1, },
{}

7
arch/arm64/kernel/image-vars.h
View File

@ -10,7 +10,7 @@
#error This file should only be included in vmlinux.lds.S
#endif
PROVIDE(__efistub_primary_entry_offset = primary_entry - _text);
PROVIDE(__efistub_primary_entry = primary_entry);
/*
* The EFI stub has its own symbol namespace prefixed by __efistub_, to
@ -21,10 +21,11 @@ PROVIDE(__efistub_primary_entry_offset = primary_entry - _text);
* linked at. The routines below are all implemented in assembler in a
* position independent manner
*/
PROVIDE(__efistub_dcache_clean_poc = __pi_dcache_clean_poc);
PROVIDE(__efistub_caches_clean_inval_pou = __pi_caches_clean_inval_pou);
PROVIDE(__efistub__text = _text);
PROVIDE(__efistub__end = _end);
PROVIDE(__efistub___inittext_end = __inittext_end);
PROVIDE(__efistub__edata = _edata);
PROVIDE(__efistub_screen_info = screen_info);
PROVIDE(__efistub__ctype = _ctype);
@ -67,9 +68,7 @@ KVM_NVHE_ALIAS(__hyp_stub_vectors);
KVM_NVHE_ALIAS(vgic_v2_cpuif_trap);
KVM_NVHE_ALIAS(vgic_v3_cpuif_trap);
/* Static key checked in pmr_sync(). */
#ifdef CONFIG_ARM64_PSEUDO_NMI
KVM_NVHE_ALIAS(gic_pmr_sync);
/* Static key checked in GIC_PRIO_IRQOFF. */
KVM_NVHE_ALIAS(gic_nonsecure_priorities);
#endif

11
arch/arm64/kernel/patch-scs.c
View File

@ -130,7 +130,8 @@ struct eh_frame {
static int noinstr scs_handle_fde_frame(const struct eh_frame *frame,
bool fde_has_augmentation_data,
int code_alignment_factor)
int code_alignment_factor,
bool dry_run)
{
int size = frame->size - offsetof(struct eh_frame, opcodes) + 4;
u64 loc = (u64)offset_to_ptr(&frame->initial_loc);
@ -184,7 +185,8 @@ static int noinstr scs_handle_fde_frame(const struct eh_frame *frame,
break;
case DW_CFA_negate_ra_state:
scs_patch_loc(loc - 4);
if (!dry_run)
scs_patch_loc(loc - 4);
break;
case 0x40 ... 0x7f:
@ -235,9 +237,12 @@ int noinstr scs_patch(const u8 eh_frame[], int size)
} else {
ret = scs_handle_fde_frame(frame,
fde_has_augmentation_data,
code_alignment_factor);
code_alignment_factor,
true);
if (ret)
return ret;
scs_handle_fde_frame(frame, fde_has_augmentation_data,
code_alignment_factor, false);
}
p += sizeof(frame->size) + frame->size;

17
arch/arm64/kernel/patching.c
View File

@ -88,6 +88,23 @@ int __kprobes aarch64_insn_write(void *addr, u32 insn)
return __aarch64_insn_write(addr, cpu_to_le32(insn));
}
noinstr int aarch64_insn_write_literal_u64(void *addr, u64 val)
{
u64 *waddr;
unsigned long flags;
int ret;
raw_spin_lock_irqsave(&patch_lock, flags);
waddr = patch_map(addr, FIX_TEXT_POKE0);
ret = copy_to_kernel_nofault(waddr, &val, sizeof(val));
patch_unmap(FIX_TEXT_POKE0);
raw_spin_unlock_irqrestore(&patch_lock, flags);
return ret;
}
int __kprobes aarch64_insn_patch_text_nosync(void *addr, u32 insn)
{
u32 *tp = addr;

4
arch/arm64/kernel/probes/kprobes.c
View File

@ -387,10 +387,6 @@ int __init arch_populate_kprobe_blacklist(void)
(unsigned long)__irqentry_text_end);
if (ret)
return ret;
ret = kprobe_add_area_blacklist((unsigned long)__idmap_text_start,
(unsigned long)__idmap_text_end);
if (ret)
return ret;
ret = kprobe_add_area_blacklist((unsigned long)__hyp_text_start,
(unsigned long)__hyp_text_end);
if (ret || is_kernel_in_hyp_mode())

21
arch/arm64/kernel/process.c
View File

@ -307,27 +307,28 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
/*
* In the unlikely event that we create a new thread with ZA
* enabled we should retain the ZA state so duplicate it here.
* This may be shortly freed if we exec() or if CLONE_SETTLS
* but it's simpler to do it here. To avoid confusing the rest
* of the code ensure that we have a sve_state allocated
* whenever za_state is allocated.
* enabled we should retain the ZA and ZT state so duplicate
* it here. This may be shortly freed if we exec() or if
* CLONE_SETTLS but it's simpler to do it here. To avoid
* confusing the rest of the code ensure that we have a
* sve_state allocated whenever sme_state is allocated.
*/
if (thread_za_enabled(&src->thread)) {
dst->thread.sve_state = kzalloc(sve_state_size(src),
GFP_KERNEL);
if (!dst->thread.sve_state)
return -ENOMEM;
dst->thread.za_state = kmemdup(src->thread.za_state,
za_state_size(src),
GFP_KERNEL);
if (!dst->thread.za_state) {
dst->thread.sme_state = kmemdup(src->thread.sme_state,
sme_state_size(src),
GFP_KERNEL);
if (!dst->thread.sme_state) {
kfree(dst->thread.sve_state);
dst->thread.sve_state = NULL;
return -ENOMEM;
}
} else {
dst->thread.za_state = NULL;
dst->thread.sme_state = NULL;
clear_tsk_thread_flag(dst, TIF_SME);
}

64
arch/arm64/kernel/ptrace.c
View File

@ -683,7 +683,7 @@ static int tls_set(struct task_struct *target, const struct user_regset *regset,
unsigned long tls[2];
tls[0] = target->thread.uw.tp_value;
if (system_supports_sme())
if (system_supports_tpidr2())
tls[1] = target->thread.tpidr2_el0;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, tls, 0, count);
@ -691,7 +691,7 @@ static int tls_set(struct task_struct *target, const struct user_regset *regset,
return ret;
target->thread.uw.tp_value = tls[0];
if (system_supports_sme())
if (system_supports_tpidr2())
target->thread.tpidr2_el0 = tls[1];
return ret;
@ -1045,7 +1045,7 @@ static int za_get(struct task_struct *target,
if (thread_za_enabled(&target->thread)) {
start = end;
end = ZA_PT_SIZE(vq);
membuf_write(&to, target->thread.za_state, end - start);
membuf_write(&to, target->thread.sme_state, end - start);
}
/* Zero any trailing padding */
@ -1099,7 +1099,7 @@ static int za_set(struct task_struct *target,
/* Allocate/reinit ZA storage */
sme_alloc(target);
if (!target->thread.za_state) {
if (!target->thread.sme_state) {
ret = -ENOMEM;
goto out;
}
@ -1124,7 +1124,7 @@ static int za_set(struct task_struct *target,
start = ZA_PT_ZA_OFFSET;
end = ZA_PT_SIZE(vq);
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
target->thread.za_state,
target->thread.sme_state,
start, end);
if (ret)
goto out;
@ -1138,6 +1138,51 @@ out:
return ret;
}
static int zt_get(struct task_struct *target,
const struct user_regset *regset,
struct membuf to)
{
if (!system_supports_sme2())
return -EINVAL;
/*
* If PSTATE.ZA is not set then ZT will be zeroed when it is
* enabled so report the current register value as zero.
*/
if (thread_za_enabled(&target->thread))
membuf_write(&to, thread_zt_state(&target->thread),
ZT_SIG_REG_BYTES);
else
membuf_zero(&to, ZT_SIG_REG_BYTES);
return 0;
}
static int zt_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
int ret;
if (!system_supports_sme2())
return -EINVAL;
if (!thread_za_enabled(&target->thread)) {
sme_alloc(target);
if (!target->thread.sme_state)
return -ENOMEM;
}
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
thread_zt_state(&target->thread),
0, ZT_SIG_REG_BYTES);
if (ret == 0)
target->thread.svcr |= SVCR_ZA_MASK;
return ret;
}
#endif /* CONFIG_ARM64_SME */
#ifdef CONFIG_ARM64_PTR_AUTH
@ -1360,6 +1405,7 @@ enum aarch64_regset {
#ifdef CONFIG_ARM64_SVE
REGSET_SSVE,
REGSET_ZA,
REGSET_ZT,
#endif
#ifdef CONFIG_ARM64_PTR_AUTH
REGSET_PAC_MASK,
@ -1467,6 +1513,14 @@ static const struct user_regset aarch64_regsets[] = {
.regset_get = za_get,
.set = za_set,
},
[REGSET_ZT] = { /* SME ZT */
.core_note_type = NT_ARM_ZT,
.n = 1,
.size = ZT_SIG_REG_BYTES,
.align = sizeof(u64),
.regset_get = zt_get,
.set = zt_set,
},
#endif
#ifdef CONFIG_ARM64_PTR_AUTH
[REGSET_PAC_MASK] = {

17
arch/arm64/kernel/setup.c
View File

@ -58,6 +58,7 @@ static int num_standard_resources;
static struct resource *standard_resources;
phys_addr_t __fdt_pointer __initdata;
u64 mmu_enabled_at_boot __initdata;
/*
* Standard memory resources
@ -332,8 +333,12 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p)
xen_early_init();
efi_init();
if (!efi_enabled(EFI_BOOT) && ((u64)_text % MIN_KIMG_ALIGN) != 0)
pr_warn(FW_BUG "Kernel image misaligned at boot, please fix your bootloader!");
if (!efi_enabled(EFI_BOOT)) {
if ((u64)_text % MIN_KIMG_ALIGN)
pr_warn(FW_BUG "Kernel image misaligned at boot, please fix your bootloader!");
WARN_TAINT(mmu_enabled_at_boot, TAINT_FIRMWARE_WORKAROUND,
FW_BUG "Booted with MMU enabled!");
}
arm64_memblock_init();
@ -442,3 +447,11 @@ static int __init register_arm64_panic_block(void)
return 0;
}
device_initcall(register_arm64_panic_block);
static int __init check_mmu_enabled_at_boot(void)
{
if (!efi_enabled(EFI_BOOT) && mmu_enabled_at_boot)
panic("Non-EFI boot detected with MMU and caches enabled");
return 0;
}
device_initcall_sync(check_mmu_enabled_at_boot);

172
arch/arm64/kernel/signal.c
View File

@ -56,7 +56,9 @@ struct rt_sigframe_user_layout {
unsigned long fpsimd_offset;
unsigned long esr_offset;
unsigned long sve_offset;
unsigned long tpidr2_offset;
unsigned long za_offset;
unsigned long zt_offset;
unsigned long extra_offset;
unsigned long end_offset;
};
@ -220,7 +222,9 @@ static int restore_fpsimd_context(struct fpsimd_context __user *ctx)
struct user_ctxs {
struct fpsimd_context __user *fpsimd;
struct sve_context __user *sve;
struct tpidr2_context __user *tpidr2;
struct za_context __user *za;
struct zt_context __user *zt;
};
#ifdef CONFIG_ARM64_SVE
@ -361,6 +365,32 @@ extern int preserve_sve_context(void __user *ctx);
#ifdef CONFIG_ARM64_SME
static int preserve_tpidr2_context(struct tpidr2_context __user *ctx)
{
int err = 0;
current->thread.tpidr2_el0 = read_sysreg_s(SYS_TPIDR2_EL0);
__put_user_error(TPIDR2_MAGIC, &ctx->head.magic, err);
__put_user_error(sizeof(*ctx), &ctx->head.size, err);
__put_user_error(current->thread.tpidr2_el0, &ctx->tpidr2, err);
return err;
}
static int restore_tpidr2_context(struct user_ctxs *user)
{
u64 tpidr2_el0;
int err = 0;
/* Magic and size were validated deciding to call this function */
__get_user_error(tpidr2_el0, &user->tpidr2->tpidr2, err);
if (!err)
current->thread.tpidr2_el0 = tpidr2_el0;
return err;
}
static int preserve_za_context(struct za_context __user *ctx)
{
int err = 0;
@ -389,7 +419,7 @@ static int preserve_za_context(struct za_context __user *ctx)
* fpsimd_signal_preserve_current_state().
*/
err |= __copy_to_user((char __user *)ctx + ZA_SIG_REGS_OFFSET,
current->thread.za_state,
current->thread.sme_state,
ZA_SIG_REGS_SIZE(vq));
}
@ -420,7 +450,7 @@ static int restore_za_context(struct user_ctxs *user)
/*
* Careful: we are about __copy_from_user() directly into
* thread.za_state with preemption enabled, so protection is
* thread.sme_state with preemption enabled, so protection is
* needed to prevent a racing context switch from writing stale
* registers back over the new data.
*/
@ -429,13 +459,13 @@ static int restore_za_context(struct user_ctxs *user)
/* From now, fpsimd_thread_switch() won't touch thread.sve_state */
sme_alloc(current);
if (!current->thread.za_state) {
if (!current->thread.sme_state) {
current->thread.svcr &= ~SVCR_ZA_MASK;
clear_thread_flag(TIF_SME);
return -ENOMEM;
}
err = __copy_from_user(current->thread.za_state,
err = __copy_from_user(current->thread.sme_state,
(char __user const *)user->za +
ZA_SIG_REGS_OFFSET,
ZA_SIG_REGS_SIZE(vq));
@ -447,11 +477,83 @@ static int restore_za_context(struct user_ctxs *user)
return 0;
}
static int preserve_zt_context(struct zt_context __user *ctx)
{
int err = 0;
u16 reserved[ARRAY_SIZE(ctx->__reserved)];
if (WARN_ON(!thread_za_enabled(&current->thread)))
return -EINVAL;
memset(reserved, 0, sizeof(reserved));
__put_user_error(ZT_MAGIC, &ctx->head.magic, err);
__put_user_error(round_up(ZT_SIG_CONTEXT_SIZE(1), 16),
&ctx->head.size, err);
__put_user_error(1, &ctx->nregs, err);
BUILD_BUG_ON(sizeof(ctx->__reserved) != sizeof(reserved));
err |= __copy_to_user(&ctx->__reserved, reserved, sizeof(reserved));
/*
* This assumes that the ZT state has already been saved to
* the task struct by calling the function
* fpsimd_signal_preserve_current_state().
*/
err |= __copy_to_user((char __user *)ctx + ZT_SIG_REGS_OFFSET,
thread_zt_state(&current->thread),
ZT_SIG_REGS_SIZE(1));
return err ? -EFAULT : 0;
}
static int restore_zt_context(struct user_ctxs *user)
{
int err;
struct zt_context zt;
/* ZA must be restored first for this check to be valid */
if (!thread_za_enabled(&current->thread))
return -EINVAL;
if (__copy_from_user(&zt, user->zt, sizeof(zt)))
return -EFAULT;
if (zt.nregs != 1)
return -EINVAL;
if (zt.head.size != ZT_SIG_CONTEXT_SIZE(zt.nregs))
return -EINVAL;
/*
* Careful: we are about __copy_from_user() directly into
* thread.zt_state with preemption enabled, so protection is
* needed to prevent a racing context switch from writing stale
* registers back over the new data.
*/
fpsimd_flush_task_state(current);
/* From now, fpsimd_thread_switch() won't touch ZT in thread state */
err = __copy_from_user(thread_zt_state(&current->thread),
(char __user const *)user->zt +
ZT_SIG_REGS_OFFSET,
ZT_SIG_REGS_SIZE(1));
if (err)
return -EFAULT;
return 0;
}
#else /* ! CONFIG_ARM64_SME */
/* Turn any non-optimised out attempts to use these into a link error: */
extern int preserve_tpidr2_context(void __user *ctx);
extern int restore_tpidr2_context(struct user_ctxs *user);
extern int preserve_za_context(void __user *ctx);
extern int restore_za_context(struct user_ctxs *user);
extern int preserve_zt_context(void __user *ctx);
extern int restore_zt_context(struct user_ctxs *user);
#endif /* ! CONFIG_ARM64_SME */
@ -468,7 +570,9 @@ static int parse_user_sigframe(struct user_ctxs *user,
user->fpsimd = NULL;
user->sve = NULL;
user->tpidr2 = NULL;
user->za = NULL;
user->zt = NULL;
if (!IS_ALIGNED((unsigned long)base, 16))
goto invalid;
@ -534,6 +638,19 @@ static int parse_user_sigframe(struct user_ctxs *user,
user->sve = (struct sve_context __user *)head;
break;
case TPIDR2_MAGIC:
if (!system_supports_sme())
goto invalid;
if (user->tpidr2)
goto invalid;
if (size != sizeof(*user->tpidr2))
goto invalid;
user->tpidr2 = (struct tpidr2_context __user *)head;
break;
case ZA_MAGIC:
if (!system_supports_sme())
goto invalid;
@ -547,6 +664,19 @@ static int parse_user_sigframe(struct user_ctxs *user,
user->za = (struct za_context __user *)head;
break;
case ZT_MAGIC:
if (!system_supports_sme2())
goto invalid;
if (user->zt)
goto invalid;
if (size < sizeof(*user->zt))
goto invalid;
user->zt = (struct zt_context __user *)head;
break;
case EXTRA_MAGIC:
if (have_extra_context)
goto invalid;
@ -666,9 +796,15 @@ static int restore_sigframe(struct pt_regs *regs,
err = restore_fpsimd_context(user.fpsimd);
}
if (err == 0 && system_supports_sme() && user.tpidr2)
err = restore_tpidr2_context(&user);
if (err == 0 && system_supports_sme() && user.za)
err = restore_za_context(&user);
if (err == 0 && system_supports_sme2() && user.zt)
err = restore_zt_context(&user);
return err;
}
@ -760,6 +896,11 @@ static int setup_sigframe_layout(struct rt_sigframe_user_layout *user,
else
vl = task_get_sme_vl(current);
err = sigframe_alloc(user, &user->tpidr2_offset,
sizeof(struct tpidr2_context));
if (err)
return err;
if (thread_za_enabled(&current->thread))
vq = sve_vq_from_vl(vl);
@ -769,6 +910,15 @@ static int setup_sigframe_layout(struct rt_sigframe_user_layout *user,
return err;
}
if (system_supports_sme2()) {
if (add_all || thread_za_enabled(&current->thread)) {
err = sigframe_alloc(user, &user->zt_offset,
ZT_SIG_CONTEXT_SIZE(1));
if (err)
return err;
}
}
return sigframe_alloc_end(user);
}
@ -817,6 +967,13 @@ static int setup_sigframe(struct rt_sigframe_user_layout *user,
err |= preserve_sve_context(sve_ctx);
}
/* TPIDR2 if supported */
if (system_supports_sme() && err == 0) {
struct tpidr2_context __user *tpidr2_ctx =
apply_user_offset(user, user->tpidr2_offset);
err |= preserve_tpidr2_context(tpidr2_ctx);
}
/* ZA state if present */
if (system_supports_sme() && err == 0 && user->za_offset) {
struct za_context __user *za_ctx =
@ -824,6 +981,13 @@ static int setup_sigframe(struct rt_sigframe_user_layout *user,
err |= preserve_za_context(za_ctx);
}
/* ZT state if present */
if (system_supports_sme2() && err == 0 && user->zt_offset) {
struct zt_context __user *zt_ctx =
apply_user_offset(user, user->zt_offset);
err |= preserve_zt_context(zt_ctx);
}
if (err == 0 && user->extra_offset) {
char __user *sfp = (char __user *)user->sigframe;
char __user *userp =

6
arch/arm64/kernel/sleep.S
View File

@ -99,8 +99,9 @@ SYM_FUNC_END(__cpu_suspend_enter)
.pushsection ".idmap.text", "awx"
SYM_CODE_START(cpu_resume)
mov x0, xzr
bl init_kernel_el
bl finalise_el2
mov x19, x0 // preserve boot mode
#if VA_BITS > 48
ldr_l x0, vabits_actual
#endif
@ -116,6 +117,9 @@ SYM_CODE_END(cpu_resume)
.popsection
SYM_FUNC_START(_cpu_resume)
mov x0, x19
bl finalise_el2
mrs x1, mpidr_el1
adr_l x8, mpidr_hash // x8 = struct mpidr_hash virt address

8
arch/arm64/kernel/syscall.c
View File

@ -173,12 +173,8 @@ static inline void fp_user_discard(void)
* register state to track, if this changes the KVM code will
* need updating.
*/
if (system_supports_sme() && test_thread_flag(TIF_SME)) {
u64 svcr = read_sysreg_s(SYS_SVCR);
if (svcr & SVCR_SM_MASK)
sme_smstop_sm();
}
if (system_supports_sme())
sme_smstop_sm();
if (!system_supports_sve())
return;

6
arch/arm64/kernel/traps.c
View File

@ -162,10 +162,8 @@ static void dump_kernel_instr(const char *lvl, struct pt_regs *regs)
if (!bad)
p += sprintf(p, i == 0 ? "(%08x) " : "%08x ", val);
else {
p += sprintf(p, "bad PC value");
break;
}
else
p += sprintf(p, i == 0 ? "(????????) " : "???????? ");
}
printk("%sCode: %s\n", lvl, str);

8
arch/arm64/kernel/vmlinux.lds.S
View File

@ -93,6 +93,7 @@ jiffies = jiffies_64;
#ifdef CONFIG_HIBERNATION
#define HIBERNATE_TEXT \
ALIGN_FUNCTION(); \
__hibernate_exit_text_start = .; \
*(.hibernate_exit.text) \
__hibernate_exit_text_end = .;
@ -102,6 +103,7 @@ jiffies = jiffies_64;
#ifdef CONFIG_KEXEC_CORE
#define KEXEC_TEXT \
ALIGN_FUNCTION(); \
__relocate_new_kernel_start = .; \
*(.kexec_relocate.text) \
__relocate_new_kernel_end = .;
@ -179,7 +181,6 @@ SECTIONS
LOCK_TEXT
KPROBES_TEXT
HYPERVISOR_TEXT
IDMAP_TEXT
*(.gnu.warning)
. = ALIGN(16);
*(.got) /* Global offset table */
@ -206,6 +207,7 @@ SECTIONS
TRAMP_TEXT
HIBERNATE_TEXT
KEXEC_TEXT
IDMAP_TEXT
. = ALIGN(PAGE_SIZE);
}
@ -355,6 +357,8 @@ ASSERT(__idmap_text_end - (__idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K,
#ifdef CONFIG_HIBERNATION
ASSERT(__hibernate_exit_text_end - __hibernate_exit_text_start <= SZ_4K,
"Hibernate exit text is bigger than 4 KiB")
ASSERT(__hibernate_exit_text_start == swsusp_arch_suspend_exit,
"Hibernate exit text does not start with swsusp_arch_suspend_exit")
#endif
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
ASSERT((__entry_tramp_text_end - __entry_tramp_text_start) <= 3*PAGE_SIZE,
@ -381,4 +385,6 @@ ASSERT(swapper_pg_dir - tramp_pg_dir == TRAMP_SWAPPER_OFFSET,
ASSERT(__relocate_new_kernel_end - __relocate_new_kernel_start <= SZ_4K,
"kexec relocation code is bigger than 4 KiB")
ASSERT(KEXEC_CONTROL_PAGE_SIZE >= SZ_4K, "KEXEC_CONTROL_PAGE_SIZE is broken")
ASSERT(__relocate_new_kernel_start == arm64_relocate_new_kernel,
"kexec control page does not start with arm64_relocate_new_kernel")
#endif

2
arch/arm64/kvm/fpsimd.c
View File

@ -143,7 +143,7 @@ void kvm_arch_vcpu_ctxsync_fp(struct kvm_vcpu *vcpu)
fp_state.st = &vcpu->arch.ctxt.fp_regs;
fp_state.sve_state = vcpu->arch.sve_state;
fp_state.sve_vl = vcpu->arch.sve_max_vl;
fp_state.za_state = NULL;
fp_state.sme_state = NULL;
fp_state.svcr = &vcpu->arch.svcr;
fp_state.fp_type = &vcpu->arch.fp_type;

2
arch/arm64/kvm/hyp/entry.S
View File

@ -171,7 +171,7 @@ alternative_else
dsb sy // Synchronize against in-flight ld/st
isb // Prevent an early read of side-effect free ISR
mrs x2, isr_el1
tbnz x2, #8, 2f // ISR_EL1.A
tbnz x2, #ISR_EL1_A_SHIFT, 2f
ret
nop
2:

1
arch/arm64/mm/cache.S
View File

@ -56,6 +56,7 @@ SYM_FUNC_START(caches_clean_inval_pou)
caches_clean_inval_pou_macro
ret
SYM_FUNC_END(caches_clean_inval_pou)
SYM_FUNC_ALIAS(__pi_caches_clean_inval_pou, caches_clean_inval_pou)
/*
* caches_clean_inval_user_pou(start,end)

8
arch/arm64/mm/mmu.c
View File

@ -133,7 +133,7 @@ static phys_addr_t __init early_pgtable_alloc(int shift)
return phys;
}
static bool pgattr_change_is_safe(u64 old, u64 new)
bool pgattr_change_is_safe(u64 old, u64 new)
{
/*
* The following mapping attributes may be updated in live
@ -142,9 +142,13 @@ static bool pgattr_change_is_safe(u64 old, u64 new)
pteval_t mask = PTE_PXN | PTE_RDONLY | PTE_WRITE | PTE_NG;
/* creating or taking down mappings is always safe */
if (old == 0 || new == 0)
if (!pte_valid(__pte(old)) || !pte_valid(__pte(new)))
return true;
/* A live entry's pfn should not change */
if (pte_pfn(__pte(old)) != pte_pfn(__pte(new)))
return false;
/* live contiguous mappings may not be manipulated at all */
if ((old | new) & PTE_CONT)
return false;

2
arch/arm64/mm/proc.S
View File

@ -110,7 +110,6 @@ SYM_FUNC_END(cpu_do_suspend)
*
* x0: Address of context pointer
*/
.pushsection ".idmap.text", "awx"
SYM_FUNC_START(cpu_do_resume)
ldp x2, x3, [x0]
ldp x4, x5, [x0, #16]
@ -166,7 +165,6 @@ alternative_else_nop_endif
isb
ret
SYM_FUNC_END(cpu_do_resume)
.popsection
#endif
.pushsection ".idmap.text", "awx"

6
arch/arm64/tools/cpucaps
View File

@ -28,7 +28,9 @@ HAS_GENERIC_AUTH
HAS_GENERIC_AUTH_ARCH_QARMA3
HAS_GENERIC_AUTH_ARCH_QARMA5
HAS_GENERIC_AUTH_IMP_DEF
HAS_IRQ_PRIO_MASKING
HAS_GIC_CPUIF_SYSREGS
HAS_GIC_PRIO_MASKING
HAS_GIC_PRIO_RELAXED_SYNC
HAS_LDAPR
HAS_LSE_ATOMICS
HAS_NO_FPSIMD
@ -38,7 +40,6 @@ HAS_RAS_EXTN
HAS_RNG
HAS_SB
HAS_STAGE2_FWB
HAS_SYSREG_GIC_CPUIF
HAS_TIDCP1
HAS_TLB_RANGE
HAS_VIRT_HOST_EXTN
@ -50,6 +51,7 @@ MTE
MTE_ASYMM
SME
SME_FA64
SME2
SPECTRE_V2
SPECTRE_V3A
SPECTRE_V4

50
arch/arm64/tools/sysreg
View File

@ -689,17 +689,17 @@ EndEnum
Enum 11:8 FPDP
0b0000 NI
0b0001 VFPv2
0b0001 VFPv3
0b0010 VFPv3
EndEnum
Enum 7:4 FPSP
0b0000 NI
0b0001 VFPv2
0b0001 VFPv3
0b0010 VFPv3
EndEnum
Enum 3:0 SIMDReg
0b0000 NI
0b0001 IMP_16x64
0b0001 IMP_32x64
0b0010 IMP_32x64
EndEnum
EndSysreg
@ -718,7 +718,7 @@ EndEnum
Enum 23:20 SIMDHP
0b0000 NI
0b0001 SIMDHP
0b0001 SIMDHP_FLOAT
0b0010 SIMDHP_FLOAT
EndEnum
Enum 19:16 SIMDSP
0b0000 NI
@ -894,6 +894,7 @@ EndEnum
Enum 27:24 SME
0b0000 NI
0b0001 IMP
0b0010 SME2
EndEnum
Res0 23:20
Enum 19:16 MPAM_frac
@ -975,7 +976,9 @@ Enum 63 FA64
EndEnum
Res0 62:60
Enum 59:56 SMEver
0b0000 IMP
0b0000 SME
0b0001 SME2
0b0010 SME2p1
EndEnum
Enum 55:52 I16I64
0b0000 NI
@ -986,7 +989,19 @@ Enum 48 F64F64
0b0 NI
0b1 IMP
EndEnum
Res0 47:40
Enum 47:44 I16I32
0b0000 NI
0b0101 IMP
EndEnum
Enum 43 B16B16
0b0 NI
0b1 IMP
EndEnum
Enum 42 F16F16
0b0 NI
0b1 IMP
EndEnum
Res0 41:40
Enum 39:36 I8I32
0b0000 NI
0b1111 IMP
@ -999,7 +1014,10 @@ Enum 34 B16F32
0b0 NI
0b1 IMP
EndEnum
Res0 33
Enum 33 BI32I32
0b0 NI
0b1 IMP
EndEnum
Enum 32 F32F32
0b0 NI
0b1 IMP
@ -1599,7 +1617,8 @@ EndSysreg
SysregFields SMCR_ELx
Res0 63:32
Field 31 FA64
Res0 30:9
Field 30 EZT0
Res0 29:9
Raz 8:4
Field 3:0 LEN
EndSysregFields
@ -1981,3 +2000,18 @@ Field 23:16 LD
Res0 15:8
Field 7:0 LR
EndSysreg
Sysreg ISR_EL1 3 0 12 1 0
Res0 63:11
Field 10 IS
Field 9 FS
Field 8 A
Field 7 I
Field 6 F
Res0 5:0
EndSysreg
Sysreg ICC_NMIAR1_EL1 3 0 12 9 5
Res0 63:24
Field 23:0 INTID
EndSysreg

2
drivers/acpi/acpica/Makefile
View File

@ -3,7 +3,7 @@
# Makefile for ACPICA Core interpreter
#
ccflags-y := -Os -D_LINUX -DBUILDING_ACPICA
ccflags-y := -D_LINUX -DBUILDING_ACPICA
ccflags-$(CONFIG_ACPI_DEBUG) += -DACPI_DEBUG_OUTPUT
# use acpi.o to put all files here into acpi.o modparam namespace

4
drivers/firmware/efi/libstub/Makefile
View File

@ -87,7 +87,7 @@ lib-$(CONFIG_EFI_GENERIC_STUB) += efi-stub.o string.o intrinsics.o systable.o \
screen_info.o efi-stub-entry.o
lib-$(CONFIG_ARM) += arm32-stub.o
lib-$(CONFIG_ARM64) += arm64.o arm64-stub.o arm64-entry.o smbios.o
lib-$(CONFIG_ARM64) += arm64.o arm64-stub.o smbios.o
lib-$(CONFIG_X86) += x86-stub.o
lib-$(CONFIG_RISCV) += riscv.o riscv-stub.o
lib-$(CONFIG_LOONGARCH) += loongarch.o loongarch-stub.o
@ -141,7 +141,7 @@ STUBCOPY_RELOC-$(CONFIG_ARM) := R_ARM_ABS
#
STUBCOPY_FLAGS-$(CONFIG_ARM64) += --prefix-alloc-sections=.init \
--prefix-symbols=__efistub_
STUBCOPY_RELOC-$(CONFIG_ARM64) := R_AARCH64_ABS64
STUBCOPY_RELOC-$(CONFIG_ARM64) := R_AARCH64_ABS
# For RISC-V, we don't need anything special other than arm64. Keep all the
# symbols in .init section and make sure that no absolute symbols references

67
drivers/firmware/efi/libstub/arm64-entry.S
View File

@ -1,67 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* EFI entry point.
*
* Copyright (C) 2013, 2014 Red Hat, Inc.
* Author: Mark Salter <msalter@redhat.com>
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
/*
* The entrypoint of a arm64 bare metal image is at offset #0 of the
* image, so this is a reasonable default for primary_entry_offset.
* Only when the EFI stub is integrated into the core kernel, it is not
* guaranteed that the PE/COFF header has been copied to memory too, so
* in this case, primary_entry_offset should be overridden by the
* linker and point to primary_entry() directly.
*/
.weak primary_entry_offset
SYM_CODE_START(efi_enter_kernel)
/*
* efi_pe_entry() will have copied the kernel image if necessary and we
* end up here with device tree address in x1 and the kernel entry
* point stored in x0. Save those values in registers which are
* callee preserved.
*/
ldr w2, =primary_entry_offset
add x19, x0, x2 // relocated Image entrypoint
mov x0, x1 // DTB address
mov x1, xzr
mov x2, xzr
mov x3, xzr
/*
* Clean the remainder of this routine to the PoC
* so that we can safely disable the MMU and caches.
*/
adr x4, 1f
dc civac, x4
dsb sy
/* Turn off Dcache and MMU */
mrs x4, CurrentEL
cmp x4, #CurrentEL_EL2
mrs x4, sctlr_el1
b.ne 0f
mrs x4, sctlr_el2
0: bic x4, x4, #SCTLR_ELx_M
bic x4, x4, #SCTLR_ELx_C
b.eq 1f
b 2f
.balign 32
1: pre_disable_mmu_workaround
msr sctlr_el2, x4
isb
br x19 // jump to kernel entrypoint
2: pre_disable_mmu_workaround
msr sctlr_el1, x4
isb
br x19 // jump to kernel entrypoint
.org 1b + 32
SYM_CODE_END(efi_enter_kernel)

28
drivers/firmware/efi/libstub/arm64-stub.c
View File

@ -58,7 +58,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
efi_handle_t image_handle)
{
efi_status_t status;
unsigned long kernel_size, kernel_memsize = 0;
unsigned long kernel_size, kernel_codesize, kernel_memsize;
u32 phys_seed = 0;
u64 min_kimg_align = efi_get_kimg_min_align();
@ -93,6 +93,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
SEGMENT_ALIGN >> 10);
kernel_size = _edata - _text;
kernel_codesize = __inittext_end - _text;
kernel_memsize = kernel_size + (_end - _edata);
*reserve_size = kernel_memsize;
@ -121,7 +122,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
*/
*image_addr = (u64)_text;
*reserve_size = 0;
goto clean_image_to_poc;
return EFI_SUCCESS;
}
status = efi_allocate_pages_aligned(*reserve_size, reserve_addr,
@ -137,14 +138,21 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
*image_addr = *reserve_addr;
memcpy((void *)*image_addr, _text, kernel_size);
clean_image_to_poc:
/*
* Clean the copied Image to the PoC, and ensure it is not shadowed by
* stale icache entries from before relocation.
*/
dcache_clean_poc(*image_addr, *image_addr + kernel_size);
asm("ic ialluis");
caches_clean_inval_pou(*image_addr, *image_addr + kernel_codesize);
return EFI_SUCCESS;
}
asmlinkage void primary_entry(void);
unsigned long primary_entry_offset(void)
{
/*
* When built as part of the kernel, the EFI stub cannot branch to the
* kernel proper via the image header, as the PE/COFF header is
* strictly not part of the in-memory presentation of the image, only
* of the file representation. So instead, we need to jump to the
* actual entrypoint in the .text region of the image.
*/
return (char *)primary_entry - _text;
}

41
drivers/firmware/efi/libstub/arm64.c
View File

@ -56,6 +56,12 @@ efi_status_t check_platform_features(void)
return EFI_SUCCESS;
}
#ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
#define DCTYPE "civac"
#else
#define DCTYPE "cvau"
#endif
void efi_cache_sync_image(unsigned long image_base,
unsigned long alloc_size,
unsigned long code_size)
@ -64,13 +70,38 @@ void efi_cache_sync_image(unsigned long image_base,
u64 lsize = 4 << cpuid_feature_extract_unsigned_field(ctr,
CTR_EL0_DminLine_SHIFT);
do {
asm("dc civac, %0" :: "r"(image_base));
image_base += lsize;
alloc_size -= lsize;
} while (alloc_size >= lsize);
/* only perform the cache maintenance if needed for I/D coherency */
if (!(ctr & BIT(CTR_EL0_IDC_SHIFT))) {
do {
asm("dc " DCTYPE ", %0" :: "r"(image_base));
image_base += lsize;
code_size -= lsize;
} while (code_size >= lsize);
}
asm("ic ialluis");
dsb(ish);
isb();
}
unsigned long __weak primary_entry_offset(void)
{
/*
* By default, we can invoke the kernel via the branch instruction in
* the image header, so offset #0. This will be overridden by the EFI
* stub build that is linked into the core kernel, as in that case, the
* image header may not have been loaded into memory, or may be mapped
* with non-executable permissions.
*/
return 0;
}
void __noreturn efi_enter_kernel(unsigned long entrypoint,
unsigned long fdt_addr,
unsigned long fdt_size)
{
void (* __noreturn enter_kernel)(u64, u64, u64, u64);
enter_kernel = (void *)entrypoint + primary_entry_offset();
enter_kernel(fdt_addr, 0, 0, 0);
}

19
drivers/irqchip/irq-gic-v3.c
View File

@ -89,15 +89,6 @@ static DEFINE_STATIC_KEY_TRUE(supports_deactivate_key);
*/
static DEFINE_STATIC_KEY_FALSE(supports_pseudo_nmis);
/*
* Global static key controlling whether an update to PMR allowing more
* interrupts requires to be propagated to the redistributor (DSB SY).
* And this needs to be exported for modules to be able to enable
* interrupts...
*/
DEFINE_STATIC_KEY_FALSE(gic_pmr_sync);
EXPORT_SYMBOL(gic_pmr_sync);
DEFINE_STATIC_KEY_FALSE(gic_nonsecure_priorities);
EXPORT_SYMBOL(gic_nonsecure_priorities);
@ -1768,16 +1759,8 @@ static void gic_enable_nmi_support(void)
for (i = 0; i < gic_data.ppi_nr; i++)
refcount_set(&ppi_nmi_refs[i], 0);
/*
* Linux itself doesn't use 1:N distribution, so has no need to
* set PMHE. The only reason to have it set is if EL3 requires it
* (and we can't change it).
*/
if (gic_read_ctlr() & ICC_CTLR_EL1_PMHE_MASK)
static_branch_enable(&gic_pmr_sync);
pr_info("Pseudo-NMIs enabled using %s ICC_PMR_EL1 synchronisation\n",
static_branch_unlikely(&gic_pmr_sync) ? "forced" : "relaxed");
gic_has_relaxed_pmr_sync() ? "relaxed" : "forced");
/*
* How priority values are used by the GIC depends on two things:

2
drivers/irqchip/irq-gic.c
View File

@ -54,7 +54,7 @@
static void gic_check_cpu_features(void)
{
WARN_TAINT_ONCE(this_cpu_has_cap(ARM64_HAS_SYSREG_GIC_CPUIF),
WARN_TAINT_ONCE(this_cpu_has_cap(ARM64_HAS_GIC_CPUIF_SYSREGS),
TAINT_CPU_OUT_OF_SPEC,
"GICv3 system registers enabled, broken firmware!\n");
}

6
include/linux/compiler_attributes.h
View File

@ -75,12 +75,6 @@
# define __assume_aligned(a, ...)
#endif
/*
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-cold-function-attribute
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Label-Attributes.html#index-cold-label-attribute
*/
#define __cold __attribute__((__cold__))
/*
* Note the long name.
*

27
include/linux/compiler_types.h
View File

@ -79,6 +79,33 @@ static inline void __chk_io_ptr(const volatile void __iomem *ptr) { }
/* Attributes */
#include <linux/compiler_attributes.h>
#if CONFIG_FUNCTION_ALIGNMENT > 0
#define __function_aligned __aligned(CONFIG_FUNCTION_ALIGNMENT)
#else
#define __function_aligned
#endif
/*
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-cold-function-attribute
* gcc: https://gcc.gnu.org/onlinedocs/gcc/Label-Attributes.html#index-cold-label-attribute
*
* When -falign-functions=N is in use, we must avoid the cold attribute as
* contemporary versions of GCC drop the alignment for cold functions. Worse,
* GCC can implicitly mark callees of cold functions as cold themselves, so
* it's not sufficient to add __function_aligned here as that will not ensure
* that callees are correctly aligned.
*
* See:
*
* https://lore.kernel.org/lkml/Y77%2FqVgvaJidFpYt@FVFF77S0Q05N
* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88345#c9
*/
#if !defined(CONFIG_CC_IS_GCC) || (CONFIG_FUNCTION_ALIGNMENT == 0)
#define __cold __attribute__((__cold__))
#else
#define __cold
#endif
/* Builtins */
/*

18
include/linux/ftrace.h
View File

@ -39,6 +39,7 @@ static inline void ftrace_boot_snapshot(void) { }
struct ftrace_ops;
struct ftrace_regs;
struct dyn_ftrace;
#ifdef CONFIG_FUNCTION_TRACER
/*
@ -57,6 +58,9 @@ void arch_ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip);
void arch_ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct ftrace_regs *fregs);
#endif
extern const struct ftrace_ops ftrace_nop_ops;
extern const struct ftrace_ops ftrace_list_ops;
struct ftrace_ops *ftrace_find_unique_ops(struct dyn_ftrace *rec);
#endif /* CONFIG_FUNCTION_TRACER */
/* Main tracing buffer and events set up */
@ -391,8 +395,6 @@ struct ftrace_func_entry {
unsigned long direct; /* for direct lookup only */
};
struct dyn_ftrace;
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
extern int ftrace_direct_func_count;
int register_ftrace_direct(unsigned long ip, unsigned long addr);
@ -563,6 +565,8 @@ bool is_ftrace_trampoline(unsigned long addr);
* IPMODIFY - the record allows for the IP address to be changed.
* DISABLED - the record is not ready to be touched yet
* DIRECT - there is a direct function to call
* CALL_OPS - the record can use callsite-specific ops
* CALL_OPS_EN - the function is set up to use callsite-specific ops
*
* When a new ftrace_ops is registered and wants a function to save
* pt_regs, the rec->flags REGS is set. When the function has been
@ -580,9 +584,11 @@ enum {
FTRACE_FL_DISABLED = (1UL << 25),
FTRACE_FL_DIRECT = (1UL << 24),
FTRACE_FL_DIRECT_EN = (1UL << 23),
FTRACE_FL_CALL_OPS = (1UL << 22),
FTRACE_FL_CALL_OPS_EN = (1UL << 21),
};
#define FTRACE_REF_MAX_SHIFT 23
#define FTRACE_REF_MAX_SHIFT 21
#define FTRACE_REF_MAX ((1UL << FTRACE_REF_MAX_SHIFT) - 1)
#define ftrace_rec_count(rec) ((rec)->flags & FTRACE_REF_MAX)
@ -820,7 +826,8 @@ static inline int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
*/
extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr);
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
#if defined(CONFIG_DYNAMIC_FTRACE_WITH_REGS) || \
defined(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS)
/**
* ftrace_modify_call - convert from one addr to another (no nop)
* @rec: the call site record (e.g. mcount/fentry)
@ -833,6 +840,9 @@ extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr);
* what we expect it to be, and then on success of the compare,
* it should write to the location.
*
* When using call ops, this is called when the associated ops change, even
* when (addr == old_addr).
*
* The code segment at @rec->ip should be a caller to @old_addr
*
* Return must be:

1
include/uapi/linux/elf.h
View File

@ -434,6 +434,7 @@ typedef struct elf64_shdr {
#define NT_ARM_PAC_ENABLED_KEYS 0x40a /* arm64 ptr auth enabled keys (prctl()) */
#define NT_ARM_SSVE 0x40b /* ARM Streaming SVE registers */
#define NT_ARM_ZA 0x40c /* ARM SME ZA registers */
#define NT_ARM_ZT 0x40d /* ARM SME ZT registers */
#define NT_ARC_V2 0x600 /* ARCv2 accumulator/extra registers */
#define NT_VMCOREDD 0x700 /* Vmcore Device Dump Note */
#define NT_MIPS_DSP 0x800 /* MIPS DSP ASE registers */

9
kernel/exit.c
View File

@ -1898,7 +1898,14 @@ bool thread_group_exited(struct pid *pid)
}
EXPORT_SYMBOL(thread_group_exited);
__weak void abort(void)
/*
* This needs to be __function_aligned as GCC implicitly makes any
* implementation of abort() cold and drops alignment specified by
* -falign-functions=N.
*
* See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88345#c11
*/
__weak __function_aligned void abort(void)
{
BUG();

7
kernel/trace/Kconfig
View File

@ -42,6 +42,9 @@ config HAVE_DYNAMIC_FTRACE_WITH_REGS
config HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
bool
config HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS
bool
config HAVE_DYNAMIC_FTRACE_WITH_ARGS
bool
help
@ -257,6 +260,10 @@ config DYNAMIC_FTRACE_WITH_DIRECT_CALLS
depends on DYNAMIC_FTRACE_WITH_REGS
depends on HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
config DYNAMIC_FTRACE_WITH_CALL_OPS
def_bool y
depends on HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS
config DYNAMIC_FTRACE_WITH_ARGS
def_bool y
depends on DYNAMIC_FTRACE

109
kernel/trace/ftrace.c
View File

@ -125,6 +125,33 @@ struct ftrace_ops global_ops;
void ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op, struct ftrace_regs *fregs);
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS
/*
* Stub used to invoke the list ops without requiring a separate trampoline.
*/
const struct ftrace_ops ftrace_list_ops = {
.func = ftrace_ops_list_func,
.flags = FTRACE_OPS_FL_STUB,
};
static void ftrace_ops_nop_func(unsigned long ip, unsigned long parent_ip,
struct ftrace_ops *op,
struct ftrace_regs *fregs)
{
/* do nothing */
}
/*
* Stub used when a call site is disabled. May be called transiently by threads
* which have made it into ftrace_caller but haven't yet recovered the ops at
* the point the call site is disabled.
*/
const struct ftrace_ops ftrace_nop_ops = {
.func = ftrace_ops_nop_func,
.flags = FTRACE_OPS_FL_STUB,
};
#endif
static inline void ftrace_ops_init(struct ftrace_ops *ops)
{
#ifdef CONFIG_DYNAMIC_FTRACE
@ -1814,6 +1841,18 @@ static bool __ftrace_hash_rec_update(struct ftrace_ops *ops,
* if rec count is zero.
*/
}
/*
* If the rec has a single associated ops, and ops->func can be
* called directly, allow the call site to call via the ops.
*/
if (IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS) &&
ftrace_rec_count(rec) == 1 &&
ftrace_ops_get_func(ops) == ops->func)
rec->flags |= FTRACE_FL_CALL_OPS;
else
rec->flags &= ~FTRACE_FL_CALL_OPS;
count++;
/* Must match FTRACE_UPDATE_CALLS in ftrace_modify_all_code() */
@ -2108,8 +2147,9 @@ void ftrace_bug(int failed, struct dyn_ftrace *rec)
struct ftrace_ops *ops = NULL;
pr_info("ftrace record flags: %lx\n", rec->flags);
pr_cont(" (%ld)%s", ftrace_rec_count(rec),
rec->flags & FTRACE_FL_REGS ? " R" : " ");
pr_cont(" (%ld)%s%s", ftrace_rec_count(rec),
rec->flags & FTRACE_FL_REGS ? " R" : " ",
rec->flags & FTRACE_FL_CALL_OPS ? " O" : " ");
if (rec->flags & FTRACE_FL_TRAMP_EN) {
ops = ftrace_find_tramp_ops_any(rec);
if (ops) {
@ -2177,6 +2217,7 @@ static int ftrace_check_record(struct dyn_ftrace *rec, bool enable, bool update)
* want the direct enabled (it will be done via the
* direct helper). But if DIRECT_EN is set, and
* the count is not one, we need to clear it.
*
*/
if (ftrace_rec_count(rec) == 1) {
if (!(rec->flags & FTRACE_FL_DIRECT) !=
@ -2185,6 +2226,19 @@ static int ftrace_check_record(struct dyn_ftrace *rec, bool enable, bool update)
} else if (rec->flags & FTRACE_FL_DIRECT_EN) {
flag |= FTRACE_FL_DIRECT;
}
/*
* Ops calls are special, as count matters.
* As with direct calls, they must only be enabled when count
* is one, otherwise they'll be handled via the list ops.
*/
if (ftrace_rec_count(rec) == 1) {
if (!(rec->flags & FTRACE_FL_CALL_OPS) !=
!(rec->flags & FTRACE_FL_CALL_OPS_EN))
flag |= FTRACE_FL_CALL_OPS;
} else if (rec->flags & FTRACE_FL_CALL_OPS_EN) {
flag |= FTRACE_FL_CALL_OPS;
}
}
/* If the state of this record hasn't changed, then do nothing */
@ -2229,6 +2283,21 @@ static int ftrace_check_record(struct dyn_ftrace *rec, bool enable, bool update)
rec->flags &= ~FTRACE_FL_DIRECT_EN;
}
}
if (flag & FTRACE_FL_CALL_OPS) {
if (ftrace_rec_count(rec) == 1) {
if (rec->flags & FTRACE_FL_CALL_OPS)
rec->flags |= FTRACE_FL_CALL_OPS_EN;
else
rec->flags &= ~FTRACE_FL_CALL_OPS_EN;
} else {
/*
* Can only call directly if there's
* only one set of associated ops.
*/
rec->flags &= ~FTRACE_FL_CALL_OPS_EN;
}
}
}
/*
@ -2258,7 +2327,8 @@ static int ftrace_check_record(struct dyn_ftrace *rec, bool enable, bool update)
* and REGS states. The _EN flags must be disabled though.
*/
rec->flags &= ~(FTRACE_FL_ENABLED | FTRACE_FL_TRAMP_EN |
FTRACE_FL_REGS_EN | FTRACE_FL_DIRECT_EN);
FTRACE_FL_REGS_EN | FTRACE_FL_DIRECT_EN |
FTRACE_FL_CALL_OPS_EN);
}
ftrace_bug_type = FTRACE_BUG_NOP;
@ -2431,6 +2501,25 @@ ftrace_find_tramp_ops_new(struct dyn_ftrace *rec)
return NULL;
}
struct ftrace_ops *
ftrace_find_unique_ops(struct dyn_ftrace *rec)
{
struct ftrace_ops *op, *found = NULL;
unsigned long ip = rec->ip;
do_for_each_ftrace_op(op, ftrace_ops_list) {
if (hash_contains_ip(ip, op->func_hash)) {
if (found)
return NULL;
found = op;
}
} while_for_each_ftrace_op(op);
return found;
}
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
/* Protected by rcu_tasks for reading, and direct_mutex for writing */
static struct ftrace_hash *direct_functions = EMPTY_HASH;
@ -3780,11 +3869,12 @@ static int t_show(struct seq_file *m, void *v)
if (iter->flags & FTRACE_ITER_ENABLED) {
struct ftrace_ops *ops;
seq_printf(m, " (%ld)%s%s%s",
seq_printf(m, " (%ld)%s%s%s%s",
ftrace_rec_count(rec),
rec->flags & FTRACE_FL_REGS ? " R" : " ",
rec->flags & FTRACE_FL_IPMODIFY ? " I" : " ",
rec->flags & FTRACE_FL_DIRECT ? " D" : " ");
rec->flags & FTRACE_FL_DIRECT ? " D" : " ",
rec->flags & FTRACE_FL_CALL_OPS ? " O" : " ");
if (rec->flags & FTRACE_FL_TRAMP_EN) {
ops = ftrace_find_tramp_ops_any(rec);
if (ops) {
@ -3800,6 +3890,15 @@ static int t_show(struct seq_file *m, void *v)
} else {
add_trampoline_func(m, NULL, rec);
}
if (rec->flags & FTRACE_FL_CALL_OPS_EN) {
ops = ftrace_find_unique_ops(rec);
if (ops) {
seq_printf(m, "\tops: %pS (%pS)",
ops, ops->func);
} else {
seq_puts(m, "\tops: ERROR!");
}
}
if (rec->flags & FTRACE_FL_DIRECT) {
unsigned long direct;

115
tools/testing/selftests/arm64/abi/hwcap.c
View File

@ -50,6 +50,78 @@ static void sme_sigill(void)
asm volatile(".inst 0x04bf5800" : : : "x0");
}
static void sme2_sigill(void)
{
/* SMSTART ZA */
asm volatile("msr S0_3_C4_C5_3, xzr" : : : );
/* ZERO ZT0 */
asm volatile(".inst 0xc0480001" : : : );
/* SMSTOP */
asm volatile("msr S0_3_C4_C6_3, xzr" : : : );
}
static void sme2p1_sigill(void)
{
/* SMSTART SM */
asm volatile("msr S0_3_C4_C3_3, xzr" : : : );
/* BFCLAMP { Z0.H - Z1.H }, Z0.H, Z0.H */
asm volatile(".inst 0xc120C000" : : : );
/* SMSTOP */
asm volatile("msr S0_3_C4_C6_3, xzr" : : : );
}
static void smei16i32_sigill(void)
{
/* SMSTART */
asm volatile("msr S0_3_C4_C7_3, xzr" : : : );
/* SMOPA ZA0.S, P0/M, P0/M, Z0.B, Z0.B */
asm volatile(".inst 0xa0800000" : : : );
/* SMSTOP */
asm volatile("msr S0_3_C4_C6_3, xzr" : : : );
}
static void smebi32i32_sigill(void)
{
/* SMSTART */
asm volatile("msr S0_3_C4_C7_3, xzr" : : : );
/* BMOPA ZA0.S, P0/M, P0/M, Z0.B, Z0.B */
asm volatile(".inst 0x80800008" : : : );
/* SMSTOP */
asm volatile("msr S0_3_C4_C6_3, xzr" : : : );
}
static void smeb16b16_sigill(void)
{
/* SMSTART */
asm volatile("msr S0_3_C4_C7_3, xzr" : : : );
/* BFADD ZA.H[W0, 0], {Z0.H-Z1.H} */
asm volatile(".inst 0xC1E41C00" : : : );
/* SMSTOP */
asm volatile("msr S0_3_C4_C6_3, xzr" : : : );
}
static void smef16f16_sigill(void)
{
/* SMSTART */
asm volatile("msr S0_3_C4_C7_3, xzr" : : : );
/* FADD ZA.H[W0, 0], { Z0.H-Z1.H } */
asm volatile(".inst 0xc1a41C00" : : : );
/* SMSTOP */
asm volatile("msr S0_3_C4_C6_3, xzr" : : : );
}
static void sve_sigill(void)
{
/* RDVL x0, #0 */
@ -158,6 +230,49 @@ static const struct hwcap_data {
.sigill_fn = sme_sigill,
.sigill_reliable = true,
},
{
.name = "SME2",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_SME2,
.cpuinfo = "sme2",
.sigill_fn = sme2_sigill,
.sigill_reliable = true,
},
{
.name = "SME 2.1",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_SME2P1,
.cpuinfo = "sme2p1",
.sigill_fn = sme2p1_sigill,
},
{
.name = "SME I16I32",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_SME_I16I32,
.cpuinfo = "smei16i32",
.sigill_fn = smei16i32_sigill,
},
{
.name = "SME BI32I32",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_SME_BI32I32,
.cpuinfo = "smebi32i32",
.sigill_fn = smebi32i32_sigill,
},
{
.name = "SME B16B16",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_SME_B16B16,
.cpuinfo = "smeb16b16",
.sigill_fn = smeb16b16_sigill,
},
{
.name = "SME F16F16",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_SME_F16F16,
.cpuinfo = "smef16f16",
.sigill_fn = smef16f16_sigill,
},
{
.name = "SVE",
.at_hwcap = AT_HWCAP,

57
tools/testing/selftests/arm64/abi/syscall-abi-asm.S
View File

@ -23,6 +23,9 @@
.arch_extension sve
#define ID_AA64SMFR0_EL1_SMEver_SHIFT 56
#define ID_AA64SMFR0_EL1_SMEver_WIDTH 4
/*
* LDR (vector to ZA array):
* LDR ZA[\nw, #\offset], [X\nxbase, #\offset, MUL VL]
@ -45,6 +48,26 @@
| ((\offset) & 7)
.endm
/*
* LDR (ZT0)
*
* LDR ZT0, nx
*/
.macro _ldr_zt nx
.inst 0xe11f8000 \
| (((\nx) & 0x1f) << 5)
.endm
/*
* STR (ZT0)
*
* STR ZT0, nx
*/
.macro _str_zt nx
.inst 0xe13f8000 \
| (((\nx) & 0x1f) << 5)
.endm
.globl do_syscall
do_syscall:
// Store callee saved registers x19-x29 (80 bytes) plus x0 and x1
@ -64,7 +87,7 @@ do_syscall:
msr S3_3_C4_C2_2, x2
1:
// Load ZA if it's enabled - uses x12 as scratch due to SME LDR
// Load ZA and ZT0 if enabled - uses x12 as scratch due to SME LDR
tbz x2, #SVCR_ZA_SHIFT, 1f
mov w12, #0
ldr x2, =za_in
@ -73,6 +96,15 @@ do_syscall:
add x12, x12, #1
cmp x1, x12
bne 2b
// ZT0
mrs x2, S3_0_C0_C4_5 // ID_AA64SMFR0_EL1
ubfx x2, x2, #ID_AA64SMFR0_EL1_SMEver_SHIFT, \
#ID_AA64SMFR0_EL1_SMEver_WIDTH
cbz x2, 1f
adrp x2, zt_in
add x2, x2, :lo12:zt_in
_ldr_zt 2
1:
// Load GPRs x8-x28, and save our SP/FP for later comparison
@ -92,8 +124,11 @@ do_syscall:
str x29, [x2], #8 // FP
str x30, [x2], #8 // LR
// Load FPRs if we're not doing SVE
// Load FPRs if we're not doing neither SVE nor streaming SVE
cbnz x0, 1f
ldr x2, =svcr_in
tbnz x2, #SVCR_SM_SHIFT, 1f
ldr x2, =fpr_in
ldp q0, q1, [x2]
ldp q2, q3, [x2, #16 * 2]
@ -111,10 +146,11 @@ do_syscall:
ldp q26, q27, [x2, #16 * 26]
ldp q28, q29, [x2, #16 * 28]
ldp q30, q31, [x2, #16 * 30]
b 2f
1:
// Load the SVE registers if we're doing SVE/SME
cbz x0, 1f
ldr x2, =z_in
ldr z0, [x2, #0, MUL VL]
@ -155,9 +191,9 @@ do_syscall:
ldr x2, =ffr_in
ldr p0, [x2]
ldr x2, [x2, #0]
cbz x2, 2f
cbz x2, 1f
wrffr p0.b
2:
1:
ldr x2, =p_in
ldr p0, [x2, #0, MUL VL]
@ -176,7 +212,7 @@ do_syscall:
ldr p13, [x2, #13, MUL VL]
ldr p14, [x2, #14, MUL VL]
ldr p15, [x2, #15, MUL VL]
1:
2:
// Do the syscall
svc #0
@ -235,6 +271,15 @@ do_syscall:
add x12, x12, #1
cmp x1, x12
bne 2b
// ZT0
mrs x2, S3_0_C0_C4_5 // ID_AA64SMFR0_EL1
ubfx x2, x2, #ID_AA64SMFR0_EL1_SMEver_SHIFT, \
#ID_AA64SMFR0_EL1_SMEver_WIDTH
cbz x2, 1f
adrp x2, zt_out
add x2, x2, :lo12:zt_out
_str_zt 2
1:
// Save the SVE state if we have some

179
tools/testing/selftests/arm64/abi/syscall-abi.c
View File

@ -20,10 +20,13 @@
#include "syscall-abi.h"
#define NUM_VL ((SVE_VQ_MAX - SVE_VQ_MIN) + 1)
static int default_sme_vl;
static int sve_vl_count;
static unsigned int sve_vls[SVE_VQ_MAX];
static int sme_vl_count;
static unsigned int sme_vls[SVE_VQ_MAX];
extern void do_syscall(int sve_vl, int sme_vl);
static void fill_random(void *buf, size_t size)
@ -83,6 +86,7 @@ static int check_gpr(struct syscall_cfg *cfg, int sve_vl, int sme_vl, uint64_t s
#define NUM_FPR 32
uint64_t fpr_in[NUM_FPR * 2];
uint64_t fpr_out[NUM_FPR * 2];
uint64_t fpr_zero[NUM_FPR * 2];
static void setup_fpr(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
uint64_t svcr)
@ -97,7 +101,7 @@ static int check_fpr(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
int errors = 0;
int i;
if (!sve_vl) {
if (!sve_vl && !(svcr & SVCR_SM_MASK)) {
for (i = 0; i < ARRAY_SIZE(fpr_in); i++) {
if (fpr_in[i] != fpr_out[i]) {
ksft_print_msg("%s Q%d/%d mismatch %llx != %llx\n",
@ -109,6 +113,18 @@ static int check_fpr(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
}
}
/*
* In streaming mode the whole register set should be cleared
* by the transition out of streaming mode.
*/
if (svcr & SVCR_SM_MASK) {
if (memcmp(fpr_zero, fpr_out, sizeof(fpr_out)) != 0) {
ksft_print_msg("%s FPSIMD registers non-zero exiting SM\n",
cfg->name);
errors++;
}
}
return errors;
}
@ -284,8 +300,8 @@ static int check_svcr(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
return errors;
}
uint8_t za_in[SVE_NUM_PREGS * __SVE_ZREG_SIZE(SVE_VQ_MAX)];
uint8_t za_out[SVE_NUM_PREGS * __SVE_ZREG_SIZE(SVE_VQ_MAX)];
uint8_t za_in[ZA_SIG_REGS_SIZE(SVE_VQ_MAX)];
uint8_t za_out[ZA_SIG_REGS_SIZE(SVE_VQ_MAX)];
static void setup_za(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
uint64_t svcr)
@ -311,6 +327,35 @@ static int check_za(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
return errors;
}
uint8_t zt_in[ZT_SIG_REG_BYTES] __attribute__((aligned(16)));
uint8_t zt_out[ZT_SIG_REG_BYTES] __attribute__((aligned(16)));
static void setup_zt(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
uint64_t svcr)
{
fill_random(zt_in, sizeof(zt_in));
memset(zt_out, 0, sizeof(zt_out));
}
static int check_zt(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
uint64_t svcr)
{
int errors = 0;
if (!(getauxval(AT_HWCAP2) & HWCAP2_SME2))
return 0;
if (!(svcr & SVCR_ZA_MASK))
return 0;
if (memcmp(zt_in, zt_out, sizeof(zt_in)) != 0) {
ksft_print_msg("SME VL %d ZT does not match\n", sme_vl);
errors++;
}
return errors;
}
typedef void (*setup_fn)(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
uint64_t svcr);
typedef int (*check_fn)(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
@ -334,6 +379,7 @@ static struct {
{ setup_ffr, check_ffr },
{ setup_svcr, check_svcr },
{ setup_za, check_za },
{ setup_zt, check_zt },
};
static bool do_test(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
@ -355,73 +401,78 @@ static bool do_test(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
static void test_one_syscall(struct syscall_cfg *cfg)
{
int sve_vq, sve_vl;
int sme_vq, sme_vl;
int sve, sme;
int ret;
/* FPSIMD only case */
ksft_test_result(do_test(cfg, 0, default_sme_vl, 0),
"%s FPSIMD\n", cfg->name);
if (!(getauxval(AT_HWCAP) & HWCAP_SVE))
return;
for (sve_vq = SVE_VQ_MAX; sve_vq > 0; --sve_vq) {
sve_vl = prctl(PR_SVE_SET_VL, sve_vq * 16);
if (sve_vl == -1)
for (sve = 0; sve < sve_vl_count; sve++) {
ret = prctl(PR_SVE_SET_VL, sve_vls[sve]);
if (ret == -1)
ksft_exit_fail_msg("PR_SVE_SET_VL failed: %s (%d)\n",
strerror(errno), errno);
sve_vl &= PR_SVE_VL_LEN_MASK;
ksft_test_result(do_test(cfg, sve_vls[sve], default_sme_vl, 0),
"%s SVE VL %d\n", cfg->name, sve_vls[sve]);
if (sve_vq != sve_vq_from_vl(sve_vl))
sve_vq = sve_vq_from_vl(sve_vl);
ksft_test_result(do_test(cfg, sve_vl, default_sme_vl, 0),
"%s SVE VL %d\n", cfg->name, sve_vl);
if (!(getauxval(AT_HWCAP2) & HWCAP2_SME))
continue;
for (sme_vq = SVE_VQ_MAX; sme_vq > 0; --sme_vq) {
sme_vl = prctl(PR_SME_SET_VL, sme_vq * 16);
if (sme_vl == -1)
for (sme = 0; sme < sme_vl_count; sme++) {
ret = prctl(PR_SME_SET_VL, sme_vls[sme]);
if (ret == -1)
ksft_exit_fail_msg("PR_SME_SET_VL failed: %s (%d)\n",
strerror(errno), errno);
sme_vl &= PR_SME_VL_LEN_MASK;
if (sme_vq != sve_vq_from_vl(sme_vl))
sme_vq = sve_vq_from_vl(sme_vl);
ksft_test_result(do_test(cfg, sve_vl, sme_vl,
ksft_test_result(do_test(cfg, sve_vls[sve],
sme_vls[sme],
SVCR_ZA_MASK | SVCR_SM_MASK),
"%s SVE VL %d/SME VL %d SM+ZA\n",
cfg->name, sve_vl, sme_vl);
ksft_test_result(do_test(cfg, sve_vl, sme_vl,
SVCR_SM_MASK),
cfg->name, sve_vls[sve],
sme_vls[sme]);
ksft_test_result(do_test(cfg, sve_vls[sve],
sme_vls[sme], SVCR_SM_MASK),
"%s SVE VL %d/SME VL %d SM\n",
cfg->name, sve_vl, sme_vl);
ksft_test_result(do_test(cfg, sve_vl, sme_vl,
SVCR_ZA_MASK),
cfg->name, sve_vls[sve],
sme_vls[sme]);
ksft_test_result(do_test(cfg, sve_vls[sve],
sme_vls[sme], SVCR_ZA_MASK),
"%s SVE VL %d/SME VL %d ZA\n",
cfg->name, sve_vl, sme_vl);
cfg->name, sve_vls[sve],
sme_vls[sme]);
}
}
for (sme = 0; sme < sme_vl_count; sme++) {
ret = prctl(PR_SME_SET_VL, sme_vls[sme]);
if (ret == -1)
ksft_exit_fail_msg("PR_SME_SET_VL failed: %s (%d)\n",
strerror(errno), errno);
ksft_test_result(do_test(cfg, 0, sme_vls[sme],
SVCR_ZA_MASK | SVCR_SM_MASK),
"%s SME VL %d SM+ZA\n",
cfg->name, sme_vls[sme]);
ksft_test_result(do_test(cfg, 0, sme_vls[sme], SVCR_SM_MASK),
"%s SME VL %d SM\n",
cfg->name, sme_vls[sme]);
ksft_test_result(do_test(cfg, 0, sme_vls[sme], SVCR_ZA_MASK),
"%s SME VL %d ZA\n",
cfg->name, sme_vls[sme]);
}
}
int sve_count_vls(void)
void sve_count_vls(void)
{
unsigned int vq;
int vl_count = 0;
int vl;
if (!(getauxval(AT_HWCAP) & HWCAP_SVE))
return 0;
return;
/*
* Enumerate up to SVE_VQ_MAX vector lengths
*/
for (vq = SVE_VQ_MAX; vq > 0; --vq) {
for (vq = SVE_VQ_MAX; vq > 0; vq /= 2) {
vl = prctl(PR_SVE_SET_VL, vq * 16);
if (vl == -1)
ksft_exit_fail_msg("PR_SVE_SET_VL failed: %s (%d)\n",
@ -432,28 +483,22 @@ int sve_count_vls(void)
if (vq != sve_vq_from_vl(vl))
vq = sve_vq_from_vl(vl);
vl_count++;
sve_vls[sve_vl_count++] = vl;
}
return vl_count;
}
int sme_count_vls(void)
void sme_count_vls(void)
{
unsigned int vq;
int vl_count = 0;
int vl;
if (!(getauxval(AT_HWCAP2) & HWCAP2_SME))
return 0;
/* Ensure we configure a SME VL, used to flag if SVCR is set */
default_sme_vl = 16;
return;
/*
* Enumerate up to SVE_VQ_MAX vector lengths
*/
for (vq = SVE_VQ_MAX; vq > 0; --vq) {
for (vq = SVE_VQ_MAX; vq > 0; vq /= 2) {
vl = prctl(PR_SME_SET_VL, vq * 16);
if (vl == -1)
ksft_exit_fail_msg("PR_SME_SET_VL failed: %s (%d)\n",
@ -461,31 +506,47 @@ int sme_count_vls(void)
vl &= PR_SME_VL_LEN_MASK;
/* Found lowest VL */
if (sve_vq_from_vl(vl) > vq)
break;
if (vq != sve_vq_from_vl(vl))
vq = sve_vq_from_vl(vl);
vl_count++;
sme_vls[sme_vl_count++] = vl;
}
return vl_count;
/* Ensure we configure a SME VL, used to flag if SVCR is set */
default_sme_vl = sme_vls[0];
}
int main(void)
{
int i;
int tests = 1; /* FPSIMD */
int sme_ver;
srandom(getpid());
ksft_print_header();
tests += sve_count_vls();
tests += (sve_count_vls() * sme_count_vls()) * 3;
sve_count_vls();
sme_count_vls();
tests += sve_vl_count;
tests += sme_vl_count * 3;
tests += (sve_vl_count * sme_vl_count) * 3;
ksft_set_plan(ARRAY_SIZE(syscalls) * tests);
if (getauxval(AT_HWCAP2) & HWCAP2_SME2)
sme_ver = 2;
else
sme_ver = 1;
if (getauxval(AT_HWCAP2) & HWCAP2_SME_FA64)
ksft_print_msg("SME with FA64\n");
ksft_print_msg("SME%d with FA64\n", sme_ver);
else if (getauxval(AT_HWCAP2) & HWCAP2_SME)
ksft_print_msg("SME without FA64\n");
ksft_print_msg("SME%d without FA64\n", sme_ver);
for (i = 0; i < ARRAY_SIZE(syscalls); i++)
test_one_syscall(&syscalls[i]);

25
tools/testing/selftests/arm64/bti/test.c
View File

@ -6,6 +6,7 @@
#include "system.h"
#include <stdbool.h>
#include <stddef.h>
#include <linux/errno.h>
#include <linux/auxvec.h>
@ -101,7 +102,8 @@ static void handler(int n, siginfo_t *si __always_unused,
uc->uc_mcontext.pstate &= ~PSR_BTYPE_MASK;
}
static int skip_all;
/* Does the system have BTI? */
static bool have_bti;
static void __do_test(void (*trampoline)(void (*)(void)),
void (*fn)(void),
@ -109,19 +111,11 @@ static void __do_test(void (*trampoline)(void (*)(void)),
const char *name,
int expect_sigill)
{
if (skip_all) {
test_skipped++;
putstr("ok ");
putnum(test_num);
putstr(" ");
puttestname(name, trampoline_name);
putstr(" # SKIP\n");
return;
}
/* Branch Target exceptions should only happen in BTI binaries: */
if (!BTI)
/*
* Branch Target exceptions should only happen for BTI
* binaries running on a system with BTI:
*/
if (!BTI || !have_bti)
expect_sigill = 0;
sigill_expected = expect_sigill;
@ -199,9 +193,10 @@ void start(int *argcp)
putstr("# HWCAP2_BTI present\n");
if (!(hwcap & HWCAP_PACA))
putstr("# Bad hardware? Expect problems.\n");
have_bti = true;
} else {
putstr("# HWCAP2_BTI not present\n");
skip_all = 1;
have_bti = false;
}
putstr("# Test binary");

2
tools/testing/selftests/arm64/fp/.gitignore vendored
View File

@ -12,3 +12,5 @@ vlset
za-fork
za-ptrace
za-test
zt-ptrace
zt-test

5
tools/testing/selftests/arm64/fp/Makefile
View File

@ -14,6 +14,8 @@ TEST_GEN_PROGS_EXTENDED := fp-pidbench fpsimd-test \
sve-test \
ssve-test \
za-test \
zt-ptrace \
zt-test \
vlset
TEST_PROGS_EXTENDED := fpsimd-stress sve-stress ssve-stress za-stress
@ -41,5 +43,8 @@ $(OUTPUT)/za-fork: za-fork.c $(OUTPUT)/za-fork-asm.o
$(OUTPUT)/za-ptrace: za-ptrace.c
$(OUTPUT)/za-test: za-test.S $(OUTPUT)/asm-utils.o
$(CC) -nostdlib $^ -o $@
$(OUTPUT)/zt-ptrace: zt-ptrace.c
$(OUTPUT)/zt-test: zt-test.S $(OUTPUT)/asm-utils.o
$(CC) -nostdlib $^ -o $@
include ../../lib.mk

2
tools/testing/selftests/arm64/fp/assembler.h
View File

@ -57,7 +57,7 @@ endfunction
// Utility macro to print a literal string
// Clobbers x0-x4,x8
.macro puts string
.pushsection .rodata.str1.1, "aMS", 1
.pushsection .rodata.str1.1, "aMS", @progbits, 1
.L__puts_literal\@: .string "\string"
.popsection

1
tools/testing/selftests/arm64/fp/fp-pidbench.S
View File

@ -31,7 +31,6 @@
// Main program entry point
.globl _start
function _start
_start:
puts "Iterations per test: "
mov x20, #10000
lsl x20, x20, #8

34
tools/testing/selftests/arm64/fp/fp-stress.c
View File

@ -370,6 +370,19 @@ static void start_za(struct child_data *child, int vl, int cpu)
ksft_print_msg("Started %s\n", child->name);
}
static void start_zt(struct child_data *child, int cpu)
{
int ret;
ret = asprintf(&child->name, "ZT-%d", cpu);
if (ret == -1)
ksft_exit_fail_msg("asprintf() failed\n");
child_start(child, "./zt-test");
ksft_print_msg("Started %s\n", child->name);
}
static void probe_vls(int vls[], int *vl_count, int set_vl)
{
unsigned int vq;
@ -377,7 +390,7 @@ static void probe_vls(int vls[], int *vl_count, int set_vl)
*vl_count = 0;
for (vq = SVE_VQ_MAX; vq > 0; --vq) {
for (vq = SVE_VQ_MAX; vq > 0; vq /= 2) {
vl = prctl(set_vl, vq * 16);
if (vl == -1)
ksft_exit_fail_msg("SET_VL failed: %s (%d)\n",
@ -385,6 +398,9 @@ static void probe_vls(int vls[], int *vl_count, int set_vl)
vl &= PR_SVE_VL_LEN_MASK;
if (*vl_count && (vl == vls[*vl_count - 1]))
break;
vq = sve_vq_from_vl(vl);
vls[*vl_count] = vl;
@ -426,6 +442,7 @@ int main(int argc, char **argv)
bool all_children_started = false;
int seen_children;
int sve_vls[MAX_VLS], sme_vls[MAX_VLS];
bool have_sme2;
struct sigaction sa;
while ((c = getopt_long(argc, argv, "t:", options, NULL)) != -1) {
@ -458,6 +475,13 @@ int main(int argc, char **argv)
sme_vl_count = 0;
}
if (getauxval(AT_HWCAP2) & HWCAP2_SME2) {
tests += cpus;
have_sme2 = true;
} else {
have_sme2 = false;
}
/* Force context switching if we only have FPSIMD */
if (!sve_vl_count && !sme_vl_count)
fpsimd_per_cpu = 2;
@ -468,8 +492,9 @@ int main(int argc, char **argv)
ksft_print_header();
ksft_set_plan(tests);
ksft_print_msg("%d CPUs, %d SVE VLs, %d SME VLs\n",
cpus, sve_vl_count, sme_vl_count);
ksft_print_msg("%d CPUs, %d SVE VLs, %d SME VLs, SME2 %s\n",
cpus, sve_vl_count, sme_vl_count,
have_sme2 ? "present" : "absent");
if (timeout > 0)
ksft_print_msg("Will run for %ds\n", timeout);
@ -527,6 +552,9 @@ int main(int argc, char **argv)
start_ssve(&children[num_children++], sme_vls[j], i);
start_za(&children[num_children++], sme_vls[j], i);
}
if (have_sme2)
start_zt(&children[num_children++], i);
}
/*

1
tools/testing/selftests/arm64/fp/fpsimd-test.S
View File

@ -215,7 +215,6 @@ endfunction
// Main program entry point
.globl _start
function _start
_start:
mov x23, #0 // signal count
mov w0, #SIGINT

20
tools/testing/selftests/arm64/fp/sme-inst.h
View File

@ -48,4 +48,24 @@
| ((\offset) & 7)
.endm
/*
* LDR (ZT0)
*
* LDR ZT0, nx
*/
.macro _ldr_zt nx
.inst 0xe11f8000 \
| (((\nx) & 0x1f) << 5)
.endm
/*
* STR (ZT0)
*
* STR ZT0, nx
*/
.macro _str_zt nx
.inst 0xe13f8000 \
| (((\nx) & 0x1f) << 5)
.endm
#endif

14
tools/testing/selftests/arm64/fp/sve-ptrace.c
View File

@ -30,6 +30,16 @@
#define NT_ARM_SSVE 0x40b
#endif
/*
* The architecture defines the maximum VQ as 16 but for extensibility
* the kernel specifies the SVE_VQ_MAX as 512 resulting in us running
* a *lot* more tests than are useful if we use it. Until the
* architecture is extended let's limit our coverage to what is
* currently allowed, plus one extra to ensure we cover constraining
* the VL as expected.
*/
#define TEST_VQ_MAX 17
struct vec_type {
const char *name;
unsigned long hwcap_type;
@ -55,7 +65,7 @@ static const struct vec_type vec_types[] = {
},
};
#define VL_TESTS (((SVE_VQ_MAX - SVE_VQ_MIN) + 1) * 4)
#define VL_TESTS (((TEST_VQ_MAX - SVE_VQ_MIN) + 1) * 4)
#define FLAG_TESTS 2
#define FPSIMD_TESTS 2
@ -689,7 +699,7 @@ static int do_parent(pid_t child)
}
/* Step through every possible VQ */
for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) {
for (vq = SVE_VQ_MIN; vq <= TEST_VQ_MAX; vq++) {
vl = sve_vl_from_vq(vq);
/* First, try to set this vector length */

1
tools/testing/selftests/arm64/fp/sve-test.S
View File

@ -378,7 +378,6 @@ endfunction
// Main program entry point
.globl _start
function _start
_start:
mov x23, #0 // Irritation signal count
mov w0, #SIGINT

14
tools/testing/selftests/arm64/fp/za-ptrace.c
View File

@ -25,7 +25,17 @@
#define NT_ARM_ZA 0x40c
#endif
#define EXPECTED_TESTS (((SVE_VQ_MAX - SVE_VQ_MIN) + 1) * 3)
/*
* The architecture defines the maximum VQ as 16 but for extensibility
* the kernel specifies the SVE_VQ_MAX as 512 resulting in us running
* a *lot* more tests than are useful if we use it. Until the
* architecture is extended let's limit our coverage to what is
* currently allowed, plus one extra to ensure we cover constraining
* the VL as expected.
*/
#define TEST_VQ_MAX 17
#define EXPECTED_TESTS (((TEST_VQ_MAX - SVE_VQ_MIN) + 1) * 3)
static void fill_buf(char *buf, size_t size)
{
@ -301,7 +311,7 @@ static int do_parent(pid_t child)
ksft_print_msg("Parent is %d, child is %d\n", getpid(), child);
/* Step through every possible VQ */
for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) {
for (vq = SVE_VQ_MIN; vq <= TEST_VQ_MAX; vq++) {
vl = sve_vl_from_vq(vq);
/* First, try to set this vector length */

1
tools/testing/selftests/arm64/fp/za-test.S
View File

@ -231,7 +231,6 @@ endfunction
// Main program entry point
.globl _start
function _start
_start:
mov x23, #0 // signal count
mov w0, #SIGINT

365
tools/testing/selftests/arm64/fp/zt-ptrace.c Normal file
View File

@ -0,0 +1,365 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2021 ARM Limited.
*/
#include <errno.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/auxv.h>
#include <sys/prctl.h>
#include <sys/ptrace.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <asm/sigcontext.h>
#include <asm/ptrace.h>
#include "../../kselftest.h"
/* <linux/elf.h> and <sys/auxv.h> don't like each other, so: */
#ifndef NT_ARM_ZA
#define NT_ARM_ZA 0x40c
#endif
#ifndef NT_ARM_ZT
#define NT_ARM_ZT 0x40d
#endif
#define EXPECTED_TESTS 3
static int sme_vl;
static void fill_buf(char *buf, size_t size)
{
int i;
for (i = 0; i < size; i++)
buf[i] = random();
}
static int do_child(void)
{
if (ptrace(PTRACE_TRACEME, -1, NULL, NULL))
ksft_exit_fail_msg("PTRACE_TRACEME", strerror(errno));
if (raise(SIGSTOP))
ksft_exit_fail_msg("raise(SIGSTOP)", strerror(errno));
return EXIT_SUCCESS;
}
static struct user_za_header *get_za(pid_t pid, void **buf, size_t *size)
{
struct user_za_header *za;
void *p;
size_t sz = sizeof(*za);
struct iovec iov;
while (1) {
if (*size < sz) {
p = realloc(*buf, sz);
if (!p) {
errno = ENOMEM;
goto error;
}
*buf = p;
*size = sz;
}
iov.iov_base = *buf;
iov.iov_len = sz;
if (ptrace(PTRACE_GETREGSET, pid, NT_ARM_ZA, &iov))
goto error;
za = *buf;
if (za->size <= sz)
break;
sz = za->size;
}
return za;
error:
return NULL;
}
static int set_za(pid_t pid, const struct user_za_header *za)
{
struct iovec iov;
iov.iov_base = (void *)za;
iov.iov_len = za->size;
return ptrace(PTRACE_SETREGSET, pid, NT_ARM_ZA, &iov);
}
static int get_zt(pid_t pid, char zt[ZT_SIG_REG_BYTES])
{
struct iovec iov;
iov.iov_base = zt;
iov.iov_len = ZT_SIG_REG_BYTES;
return ptrace(PTRACE_GETREGSET, pid, NT_ARM_ZT, &iov);
}
static int set_zt(pid_t pid, const char zt[ZT_SIG_REG_BYTES])
{
struct iovec iov;
iov.iov_base = (void *)zt;
iov.iov_len = ZT_SIG_REG_BYTES;
return ptrace(PTRACE_SETREGSET, pid, NT_ARM_ZT, &iov);
}
/* Reading with ZA disabled returns all zeros */
static void ptrace_za_disabled_read_zt(pid_t child)
{
struct user_za_header za;
char zt[ZT_SIG_REG_BYTES];
int ret, i;
bool fail = false;
/* Disable PSTATE.ZA using the ZA interface */
memset(&za, 0, sizeof(za));
za.vl = sme_vl;
za.size = sizeof(za);
ret = set_za(child, &za);
if (ret != 0) {
ksft_print_msg("Failed to disable ZA\n");
fail = true;
}
/* Read back ZT */
ret = get_zt(child, zt);
if (ret != 0) {
ksft_print_msg("Failed to read ZT\n");
fail = true;
}
for (i = 0; i < ARRAY_SIZE(zt); i++) {
if (zt[i]) {
ksft_print_msg("zt[%d]: 0x%x != 0\n", i, zt[i]);
fail = true;
}
}
ksft_test_result(!fail, "ptrace_za_disabled_read_zt\n");
}
/* Writing then reading ZT should return the data written */
static void ptrace_set_get_zt(pid_t child)
{
char zt_in[ZT_SIG_REG_BYTES];
char zt_out[ZT_SIG_REG_BYTES];
int ret, i;
bool fail = false;
fill_buf(zt_in, sizeof(zt_in));
ret = set_zt(child, zt_in);
if (ret != 0) {
ksft_print_msg("Failed to set ZT\n");
fail = true;
}
ret = get_zt(child, zt_out);
if (ret != 0) {
ksft_print_msg("Failed to read ZT\n");
fail = true;
}
for (i = 0; i < ARRAY_SIZE(zt_in); i++) {
if (zt_in[i] != zt_out[i]) {
ksft_print_msg("zt[%d]: 0x%x != 0x%x\n", i,
zt_in[i], zt_out[i]);
fail = true;
}
}
ksft_test_result(!fail, "ptrace_set_get_zt\n");
}
/* Writing ZT should set PSTATE.ZA */
static void ptrace_enable_za_via_zt(pid_t child)
{
struct user_za_header za_in;
struct user_za_header *za_out;
char zt[ZT_SIG_REG_BYTES];
char *za_data;
size_t za_out_size;
int ret, i, vq;
bool fail = false;
/* Disable PSTATE.ZA using the ZA interface */
memset(&za_in, 0, sizeof(za_in));
za_in.vl = sme_vl;
za_in.size = sizeof(za_in);
ret = set_za(child, &za_in);
if (ret != 0) {
ksft_print_msg("Failed to disable ZA\n");
fail = true;
}
/* Write ZT */
fill_buf(zt, sizeof(zt));
ret = set_zt(child, zt);
if (ret != 0) {
ksft_print_msg("Failed to set ZT\n");
fail = true;
}
/* Read back ZA and check for register data */
za_out = NULL;
za_out_size = 0;
if (get_za(child, (void **)&za_out, &za_out_size)) {
/* Should have an unchanged VL */
if (za_out->vl != sme_vl) {
ksft_print_msg("VL changed from %d to %d\n",
sme_vl, za_out->vl);
fail = true;
}
vq = __sve_vq_from_vl(za_out->vl);
za_data = (char *)za_out + ZA_PT_ZA_OFFSET;
/* Should have register data */
if (za_out->size < ZA_PT_SIZE(vq)) {
ksft_print_msg("ZA data less than expected: %u < %u\n",
za_out->size, ZA_PT_SIZE(vq));
fail = true;
vq = 0;
}
/* That register data should be non-zero */
for (i = 0; i < ZA_PT_ZA_SIZE(vq); i++) {
if (za_data[i]) {
ksft_print_msg("ZA byte %d is %x\n",
i, za_data[i]);
fail = true;
}
}
} else {
ksft_print_msg("Failed to read ZA\n");
fail = true;
}
ksft_test_result(!fail, "ptrace_enable_za_via_zt\n");
}
static int do_parent(pid_t child)
{
int ret = EXIT_FAILURE;
pid_t pid;
int status;
siginfo_t si;
/* Attach to the child */
while (1) {
int sig;
pid = wait(&status);
if (pid == -1) {
perror("wait");
goto error;
}
/*
* This should never happen but it's hard to flag in
* the framework.
*/
if (pid != child)
continue;
if (WIFEXITED(status) || WIFSIGNALED(status))
ksft_exit_fail_msg("Child died unexpectedly\n");
if (!WIFSTOPPED(status))
goto error;
sig = WSTOPSIG(status);
if (ptrace(PTRACE_GETSIGINFO, pid, NULL, &si)) {
if (errno == ESRCH)
goto disappeared;
if (errno == EINVAL) {
sig = 0; /* bust group-stop */
goto cont;
}
ksft_test_result_fail("PTRACE_GETSIGINFO: %s\n",
strerror(errno));
goto error;
}
if (sig == SIGSTOP && si.si_code == SI_TKILL &&
si.si_pid == pid)
break;
cont:
if (ptrace(PTRACE_CONT, pid, NULL, sig)) {
if (errno == ESRCH)
goto disappeared;
ksft_test_result_fail("PTRACE_CONT: %s\n",
strerror(errno));
goto error;
}
}
ksft_print_msg("Parent is %d, child is %d\n", getpid(), child);
ptrace_za_disabled_read_zt(child);
ptrace_set_get_zt(child);
ptrace_enable_za_via_zt(child);
ret = EXIT_SUCCESS;
error:
kill(child, SIGKILL);
disappeared:
return ret;
}
int main(void)
{
int ret = EXIT_SUCCESS;
pid_t child;
srandom(getpid());
ksft_print_header();
if (!(getauxval(AT_HWCAP2) & HWCAP2_SME2)) {
ksft_set_plan(1);
ksft_exit_skip("SME2 not available\n");
}
/* We need a valid SME VL to enable/disable ZA */
sme_vl = prctl(PR_SME_GET_VL);
if (sme_vl == -1) {
ksft_set_plan(1);
ksft_exit_skip("Failed to read SME VL: %d (%s)\n",
errno, strerror(errno));
}
ksft_set_plan(EXPECTED_TESTS);
child = fork();
if (!child)
return do_child();
if (do_parent(child))
ret = EXIT_FAILURE;
ksft_print_cnts();
return ret;
}

316
tools/testing/selftests/arm64/fp/zt-test.S Normal file
View File

@ -0,0 +1,316 @@
// SPDX-License-Identifier: GPL-2.0-only
// Copyright (C) 2021-2 ARM Limited.
// Original author: Mark Brown <broonie@kernel.org>
//
// Scalable Matrix Extension ZT context switch test
// Repeatedly writes unique test patterns into ZT0
// and reads them back to verify integrity.
#include <asm/unistd.h>
#include "assembler.h"
#include "asm-offsets.h"
#include "sme-inst.h"
.arch_extension sve
#define ZT_SZ 512
#define ZT_B (ZT_SZ / 8)
// Declare some storage space to shadow ZT register contents and a
// scratch buffer.
.pushsection .text
.data
.align 4
ztref:
.space ZT_B
scratch:
.space ZT_B
.popsection
// Generate a test pattern for storage in ZT
// x0: pid
// x1: generation
// These values are used to construct a 32-bit pattern that is repeated in the
// scratch buffer as many times as will fit:
// bits 31:24 generation number (increments once per test_loop)
// bits 23: 8 pid
// bits 7: 0 32-bit lane index
function pattern
mov w3, wzr
bfi w3, w0, #8, #16 // PID
bfi w3, w1, #24, #8 // Generation
ldr x0, =scratch
mov w1, #ZT_B / 4
0: str w3, [x0], #4
add w3, w3, #1 // Lane
subs w1, w1, #1
b.ne 0b
ret
endfunction
// Set up test pattern in a ZT horizontal vector
// x0: pid
// x1: generation
function setup_zt
mov x4, x30
bl pattern // Get pattern in scratch buffer
ldr x0, =ztref
ldr x1, =scratch
mov x2, #ZT_B
bl memcpy
ldr x0, =ztref
_ldr_zt 0 // load zt0 from pointer x0
ret x4
endfunction
// Trivial memory compare: compare x2 bytes starting at address x0 with
// bytes starting at address x1.
// Returns only if all bytes match; otherwise, the program is aborted.
// Clobbers x0-x5.
function memcmp
cbz x2, 2f
stp x0, x1, [sp, #-0x20]!
str x2, [sp, #0x10]
mov x5, #0
0: ldrb w3, [x0, x5]
ldrb w4, [x1, x5]
add x5, x5, #1
cmp w3, w4
b.ne 1f
subs x2, x2, #1
b.ne 0b
1: ldr x2, [sp, #0x10]
ldp x0, x1, [sp], #0x20
b.ne barf
2: ret
endfunction
// Verify that a ZT vector matches its shadow in memory, else abort
// Clobbers x0-x3
function check_zt
mov x3, x30
ldr x0, =scratch // Poison scratch
mov x1, #ZT_B
bl memfill_ae
ldr x0, =scratch
_str_zt 0
ldr x0, =ztref
ldr x1, =scratch
mov x2, #ZT_B
mov x30, x3
b memcmp
endfunction
// Any SME register modified here can cause corruption in the main
// thread -- but *only* the locations modified here.
function irritator_handler
// Increment the irritation signal count (x23):
ldr x0, [x2, #ucontext_regs + 8 * 23]
add x0, x0, #1
str x0, [x2, #ucontext_regs + 8 * 23]
// Corrupt some random ZT data
#if 0
adr x0, .text + (irritator_handler - .text) / 16 * 16
movi v0.8b, #1
movi v9.16b, #2
movi v31.8b, #3
#endif
ret
endfunction
function tickle_handler
// Increment the signal count (x23):
ldr x0, [x2, #ucontext_regs + 8 * 23]
add x0, x0, #1
str x0, [x2, #ucontext_regs + 8 * 23]
ret
endfunction
function terminate_handler
mov w21, w0
mov x20, x2
puts "Terminated by signal "
mov w0, w21
bl putdec
puts ", no error, iterations="
ldr x0, [x20, #ucontext_regs + 8 * 22]
bl putdec
puts ", signals="
ldr x0, [x20, #ucontext_regs + 8 * 23]
bl putdecn
mov x0, #0
mov x8, #__NR_exit
svc #0
endfunction
// w0: signal number
// x1: sa_action
// w2: sa_flags
// Clobbers x0-x6,x8
function setsignal
str x30, [sp, #-((sa_sz + 15) / 16 * 16 + 16)]!
mov w4, w0
mov x5, x1
mov w6, w2
add x0, sp, #16
mov x1, #sa_sz
bl memclr
mov w0, w4
add x1, sp, #16
str w6, [x1, #sa_flags]
str x5, [x1, #sa_handler]
mov x2, #0
mov x3, #sa_mask_sz
mov x8, #__NR_rt_sigaction
svc #0
cbz w0, 1f
puts "sigaction failure\n"
b .Labort
1: ldr x30, [sp], #((sa_sz + 15) / 16 * 16 + 16)
ret
endfunction
// Main program entry point
.globl _start
function _start
mov x23, #0 // signal count
mov w0, #SIGINT
adr x1, terminate_handler
mov w2, #SA_SIGINFO
bl setsignal
mov w0, #SIGTERM
adr x1, terminate_handler
mov w2, #SA_SIGINFO
bl setsignal
mov w0, #SIGUSR1
adr x1, irritator_handler
mov w2, #SA_SIGINFO
orr w2, w2, #SA_NODEFER
bl setsignal
mov w0, #SIGUSR2
adr x1, tickle_handler
mov w2, #SA_SIGINFO
orr w2, w2, #SA_NODEFER
bl setsignal
smstart_za
// Obtain our PID, to ensure test pattern uniqueness between processes
mov x8, #__NR_getpid
svc #0
mov x20, x0
puts "PID:\t"
mov x0, x20
bl putdecn
mov x22, #0 // generation number, increments per iteration
.Ltest_loop:
mov x0, x20
mov x1, x22
bl setup_zt
mov x8, #__NR_sched_yield // Encourage preemption
svc #0
mrs x0, S3_3_C4_C2_2 // SVCR should have ZA=1,SM=0
and x1, x0, #3
cmp x1, #2
b.ne svcr_barf
bl check_zt
add x22, x22, #1 // Everything still working
b .Ltest_loop
.Labort:
mov x0, #0
mov x1, #SIGABRT
mov x8, #__NR_kill
svc #0
endfunction
function barf
// fpsimd.c acitivty log dump hack
// ldr w0, =0xdeadc0de
// mov w8, #__NR_exit
// svc #0
// end hack
smstop
mov x10, x0 // expected data
mov x11, x1 // actual data
mov x12, x2 // data size
puts "Mismatch: PID="
mov x0, x20
bl putdec
puts ", iteration="
mov x0, x22
bl putdec
puts "\tExpected ["
mov x0, x10
mov x1, x12
bl dumphex
puts "]\n\tGot ["
mov x0, x11
mov x1, x12
bl dumphex
puts "]\n"
mov x8, #__NR_getpid
svc #0
// fpsimd.c acitivty log dump hack
// ldr w0, =0xdeadc0de
// mov w8, #__NR_exit
// svc #0
// ^ end of hack
mov x1, #SIGABRT
mov x8, #__NR_kill
svc #0
// mov x8, #__NR_exit
// mov x1, #1
// svc #0
endfunction
function svcr_barf
mov x10, x0
puts "Bad SVCR: "
mov x0, x10
bl putdecn
mov x8, #__NR_exit
mov x1, #1
svc #0
endfunction

21
tools/testing/selftests/arm64/mte/Makefile
View File

@ -1,24 +1,33 @@
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2020 ARM Limited
# preserve CC value from top level Makefile
ifeq ($(CC),cc)
CC := $(CROSS_COMPILE)gcc
endif
CFLAGS += -std=gnu99 -I. -pthread
LDFLAGS += -pthread
SRCS := $(filter-out mte_common_util.c,$(wildcard *.c))
PROGS := $(patsubst %.c,%,$(SRCS))
ifeq ($(LLVM),)
# For GCC check that the toolchain has MTE support.
# preserve CC value from top level Makefile
ifeq ($(CC),cc)
CC := $(CROSS_COMPILE)gcc
endif
#check if the compiler works well
mte_cc_support := $(shell if ($(CC) $(CFLAGS) -march=armv8.5-a+memtag -E -x c /dev/null -o /dev/null 2>&1) then echo "1"; fi)
else
# All supported clang versions also support MTE.
mte_cc_support := 1
endif
ifeq ($(mte_cc_support),1)
# Generated binaries to be installed by top KSFT script
TEST_GEN_PROGS := $(PROGS)
# Get Kernel headers installed and use them.
else
$(warning compiler "$(CC)" does not support the ARMv8.5 MTE extension.)
$(warning test program "mte" will not be created.)

2
tools/testing/selftests/arm64/signal/.gitignore vendored
View File

@ -4,5 +4,7 @@ fake_sigreturn_*
sme_*
ssve_*
sve_*
tpidr2_siginfo
za_*
zt_*
!*.[ch]

8
tools/testing/selftests/arm64/signal/Makefile
View File

@ -22,6 +22,10 @@ $(TEST_GEN_PROGS): $(PROGS)
# Common test-unit targets to build common-layout test-cases executables
# Needs secondary expansion to properly include the testcase c-file in pre-reqs
COMMON_SOURCES := test_signals.c test_signals_utils.c testcases/testcases.c \
signals.S
COMMON_HEADERS := test_signals.h test_signals_utils.h testcases/testcases.h
.SECONDEXPANSION:
$(PROGS): test_signals.c test_signals_utils.c testcases/testcases.c signals.S $$@.c test_signals.h test_signals_utils.h testcases/testcases.h
$(CC) $(CFLAGS) $^ -o $@
$(PROGS): $$@.c ${COMMON_SOURCES} ${COMMON_HEADERS}
$(CC) $(CFLAGS) ${@}.c ${COMMON_SOURCES} -o $@

4
tools/testing/selftests/arm64/signal/test_signals.c
View File

@ -12,12 +12,10 @@
#include "test_signals.h"
#include "test_signals_utils.h"
struct tdescr *current;
struct tdescr *current = &tde;
int main(int argc, char *argv[])
{
current = &tde;
ksft_print_msg("%s :: %s\n", current->name, current->descr);
if (test_setup(current) && test_init(current)) {
test_run(current);

2
tools/testing/selftests/arm64/signal/test_signals.h
View File

@ -34,6 +34,7 @@ enum {
FSVE_BIT,
FSME_BIT,
FSME_FA64_BIT,
FSME2_BIT,
FMAX_END
};
@ -41,6 +42,7 @@ enum {
#define FEAT_SVE (1UL << FSVE_BIT)
#define FEAT_SME (1UL << FSME_BIT)
#define FEAT_SME_FA64 (1UL << FSME_FA64_BIT)
#define FEAT_SME2 (1UL << FSME2_BIT)
/*
* A descriptor used to describe and configure a test case.

9
tools/testing/selftests/arm64/signal/test_signals_utils.c
View File

@ -29,6 +29,7 @@ static char const *const feats_names[FMAX_END] = {
" SVE ",
" SME ",
" FA64 ",
" SME2 ",
};
#define MAX_FEATS_SZ 128
@ -192,8 +193,10 @@ static bool handle_signal_copyctx(struct tdescr *td,
* in the copy, this was previously validated in
* ASSERT_GOOD_CONTEXT().
*/
to_copy = offset + sizeof(struct extra_context) + 16 +
extra->size;
to_copy = __builtin_offsetof(ucontext_t,
uc_mcontext.__reserved);
to_copy += offset + sizeof(struct extra_context) + 16;
to_copy += extra->size;
copied_extra = (struct extra_context *)&(td->live_uc->uc_mcontext.__reserved[offset]);
} else {
copied_extra = NULL;
@ -323,6 +326,8 @@ int test_init(struct tdescr *td)
td->feats_supported |= FEAT_SME;
if (getauxval(AT_HWCAP2) & HWCAP2_SME_FA64)
td->feats_supported |= FEAT_SME_FA64;
if (getauxval(AT_HWCAP2) & HWCAP2_SME2)
td->feats_supported |= FEAT_SME2;
if (feats_ok(td)) {
if (td->feats_required & td->feats_supported)
fprintf(stderr,

16
tools/testing/selftests/arm64/signal/testcases/ssve_regs.c
View File

@ -34,6 +34,10 @@ static bool sme_get_vls(struct tdescr *td)
vl &= PR_SME_VL_LEN_MASK;
/* Did we find the lowest supported VL? */
if (vq < sve_vq_from_vl(vl))
break;
/* Skip missing VLs */
vq = sve_vq_from_vl(vl);
@ -92,6 +96,11 @@ static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc,
return 1;
}
if (!(ssve->flags & SVE_SIG_FLAG_SM)) {
fprintf(stderr, "SVE_SIG_FLAG_SM not set in SVE record\n");
return 1;
}
/* The actual size validation is done in get_current_context() */
fprintf(stderr, "Got expected size %u and VL %d\n",
head->size, ssve->vl);
@ -116,12 +125,7 @@ static int sme_regs(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
struct tdescr tde = {
.name = "Streaming SVE registers",
.descr = "Check that we get the right Streaming SVE registers reported",
/*
* We shouldn't require FA64 but things like memset() used in the
* helpers might use unsupported instructions so for now disable
* the test unless we've got the full instruction set.
*/
.feats_required = FEAT_SME | FEAT_SME_FA64,
.feats_required = FEAT_SME,
.timeout = 3,
.init = sme_get_vls,
.run = sme_regs,

161
tools/testing/selftests/arm64/signal/testcases/ssve_za_regs.c Normal file
View File

@ -0,0 +1,161 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2021 ARM Limited
*
* Verify that both the streaming SVE and ZA register context in
* signal frames is set up as expected when enabled simultaneously.
*/
#include <signal.h>
#include <ucontext.h>
#include <sys/prctl.h>
#include "test_signals_utils.h"
#include "testcases.h"
static union {
ucontext_t uc;
char buf[1024 * 128];
} context;
static unsigned int vls[SVE_VQ_MAX];
unsigned int nvls = 0;
static bool sme_get_vls(struct tdescr *td)
{
int vq, vl;
/*
* Enumerate up to SVE_VQ_MAX vector lengths
*/
for (vq = SVE_VQ_MAX; vq > 0; --vq) {
vl = prctl(PR_SME_SET_VL, vq * 16);
if (vl == -1)
return false;
vl &= PR_SME_VL_LEN_MASK;
/* Did we find the lowest supported VL? */
if (vq < sve_vq_from_vl(vl))
break;
/* Skip missing VLs */
vq = sve_vq_from_vl(vl);
vls[nvls++] = vl;
}
/* We need at least one VL */
if (nvls < 1) {
fprintf(stderr, "Only %d VL supported\n", nvls);
return false;
}
return true;
}
static void setup_regs(void)
{
/* smstart sm; real data is TODO */
asm volatile(".inst 0xd503437f" : : : );
/* smstart za; real data is TODO */
asm volatile(".inst 0xd503457f" : : : );
}
static char zeros[ZA_SIG_REGS_SIZE(SVE_VQ_MAX)];
static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc,
unsigned int vl)
{
size_t offset;
struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context);
struct _aarch64_ctx *regs;
struct sve_context *ssve;
struct za_context *za;
int ret;
fprintf(stderr, "Testing VL %d\n", vl);
ret = prctl(PR_SME_SET_VL, vl);
if (ret != vl) {
fprintf(stderr, "Failed to set VL, got %d\n", ret);
return 1;
}
/*
* Get a signal context which should have the SVE and ZA
* frames in it.
*/
setup_regs();
if (!get_current_context(td, &context.uc, sizeof(context)))
return 1;
regs = get_header(head, SVE_MAGIC, GET_BUF_RESV_SIZE(context),
&offset);
if (!regs) {
fprintf(stderr, "No SVE context\n");
return 1;
}
ssve = (struct sve_context *)regs;
if (ssve->vl != vl) {
fprintf(stderr, "Got SSVE VL %d, expected %d\n", ssve->vl, vl);
return 1;
}
if (!(ssve->flags & SVE_SIG_FLAG_SM)) {
fprintf(stderr, "SVE_SIG_FLAG_SM not set in SVE record\n");
return 1;
}
fprintf(stderr, "Got expected SSVE size %u and VL %d\n",
regs->size, ssve->vl);
regs = get_header(head, ZA_MAGIC, GET_BUF_RESV_SIZE(context),
&offset);
if (!regs) {
fprintf(stderr, "No ZA context\n");
return 1;
}
za = (struct za_context *)regs;
if (za->vl != vl) {
fprintf(stderr, "Got ZA VL %d, expected %d\n", za->vl, vl);
return 1;
}
fprintf(stderr, "Got expected ZA size %u and VL %d\n",
regs->size, za->vl);
/* We didn't load any data into ZA so it should be all zeros */
if (memcmp(zeros, (char *)za + ZA_SIG_REGS_OFFSET,
ZA_SIG_REGS_SIZE(sve_vq_from_vl(za->vl))) != 0) {
fprintf(stderr, "ZA data invalid\n");
return 1;
}
return 0;
}
static int sme_regs(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
{
int i;
for (i = 0; i < nvls; i++) {
if (do_one_sme_vl(td, si, uc, vls[i]))
return 1;
}
td->pass = 1;
return 0;
}
struct tdescr tde = {
.name = "Streaming SVE registers",
.descr = "Check that we get the right Streaming SVE registers reported",
.feats_required = FEAT_SME,
.timeout = 3,
.init = sme_get_vls,
.run = sme_regs,
};

40
tools/testing/selftests/arm64/signal/testcases/testcases.c
View File

@ -108,6 +108,26 @@ bool validate_za_context(struct za_context *za, char **err)
return true;
}
bool validate_zt_context(struct zt_context *zt, char **err)
{
if (!zt || !err)
return false;
/* If the context is present there should be at least one register */
if (zt->nregs == 0) {
*err = "no registers";
return false;
}
/* Size should agree with the number of registers */
if (zt->head.size != ZT_SIG_CONTEXT_SIZE(zt->nregs)) {
*err = "register count does not match size";
return false;
}
return true;
}
bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
{
bool terminated = false;
@ -117,6 +137,7 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
struct extra_context *extra = NULL;
struct sve_context *sve = NULL;
struct za_context *za = NULL;
struct zt_context *zt = NULL;
struct _aarch64_ctx *head =
(struct _aarch64_ctx *)uc->uc_mcontext.__reserved;
void *extra_data = NULL;
@ -163,6 +184,10 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
if (head->size != sizeof(struct esr_context))
*err = "Bad size for esr_context";
break;
case TPIDR2_MAGIC:
if (head->size != sizeof(struct tpidr2_context))
*err = "Bad size for tpidr2_context";
break;
case SVE_MAGIC:
if (flags & SVE_CTX)
*err = "Multiple SVE_MAGIC";
@ -177,6 +202,13 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
za = (struct za_context *)head;
new_flags |= ZA_CTX;
break;
case ZT_MAGIC:
if (flags & ZT_CTX)
*err = "Multiple ZT_MAGIC";
/* Size is validated in validate_za_context() */
zt = (struct zt_context *)head;
new_flags |= ZT_CTX;
break;
case EXTRA_MAGIC:
if (flags & EXTRA_CTX)
*err = "Multiple EXTRA_MAGIC";
@ -234,6 +266,9 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
if (new_flags & ZA_CTX)
if (!validate_za_context(za, err))
return false;
if (new_flags & ZT_CTX)
if (!validate_zt_context(zt, err))
return false;
flags |= new_flags;
@ -245,6 +280,11 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
return false;
}
if (terminated && (flags & ZT_CTX) && !(flags & ZA_CTX)) {
*err = "ZT context but no ZA context";
return false;
}
return true;
}

1
tools/testing/selftests/arm64/signal/testcases/testcases.h
View File

@ -18,6 +18,7 @@
#define SVE_CTX (1 << 1)
#define ZA_CTX (1 << 2)
#define EXTRA_CTX (1 << 3)
#define ZT_CTX (1 << 4)
#define KSFT_BAD_MAGIC 0xdeadbeef

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