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2259da159fbe5dba8ac00b560cf00b6a6537fa18
linux/arch/x86/kernel
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Thadeu Lima de Souza Cascardo 2259da159f x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported 
There are some VM configurations which have Skylake model but do not
support IBPB. In those cases, when using retbleed=ibpb, userspace is going
to be killed and kernel is going to panic.

If the CPU does not support IBPB, warn and proceed with the auto option. Also,
do not fallback to IBPB on AMD/Hygon systems if it is not supported.

Fixes: 3ebc170068 ("x86/bugs: Add retbleed=ibpb")
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
2022-07-08 12:50:52 +02:00
..
acpi
Merge tag 'pm-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2022-05-24 16:04:25 -07:00
apic
Merge tag 'x86_misc_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2022-05-23 19:32:59 -07:00
cpu
x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported
2022-07-08 12:50:52 +02:00
fpu
Merge tag 'kthread-cleanups-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2022-06-03 16:03:05 -07:00
kprobes
x86,kprobes: Fix optprobe trampoline to generate complete pt_regs
2022-03-28 19:38:51 -07:00
.gitignore
…
alternative.c
x86/retbleed: Add fine grained Kconfig knobs
2022-06-29 17:43:41 +02:00
amd_gart_64.c
x86: remove the IOMMU table infrastructure
2022-04-18 07:21:10 +02:00
amd_nb.c
x86/amd_nb: Unexport amd_cache_northbridges()
2022-04-05 19:22:27 +02:00
aperture_64.c
x86: remove the IOMMU table infrastructure
2022-04-18 07:21:10 +02:00
apm_32.c
x86/ibt: Disable IBT around firmware
2022-03-15 10:32:40 +01:00
asm-offsets_32.c
x86/stackprotector/32: Make the canary into a regular percpu variable
2021-03-08 13:19:05 +01:00
asm-offsets_64.c
KVM: x86: Support the vCPU preemption check with nopvspin and realtime hint
2022-04-02 05:41:21 -04:00
asm-offsets.c
KVM: VMX: Prevent RSB underflow before vmenter
2022-06-27 10:34:00 +02:00
audit_64.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
bootflag.c
…
check.c
…
cpuid.c
…
crash_core_32.c
…
crash_core_64.c
…
crash_dump_32.c
vmcore: convert copy_oldmem_page() to take an iov_iter
2022-04-29 14:37:59 -07:00
crash_dump_64.c
vmcore: convert read_from_oldmem() to take an iov_iter
2022-04-29 14:37:59 -07:00
crash.c
x86/crash: Fix minor typo/bug in debug message
2022-04-13 19:39:54 +02:00
devicetree.c
Merge tag 'devicetree-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
2021-11-02 22:22:13 -07:00
doublefault_32.c
exit/doublefault: Remove apparently bogus comment about rewind_stack_do_exit
2021-10-20 13:09:43 -05:00
dumpstack_32.c
…
dumpstack_64.c
x86/mm/64: Improve stack overflow warnings
2021-09-21 13:57:43 +02:00
dumpstack.c
x86: remove __range_not_ok()
2022-02-25 09:36:05 +01:00
e820.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-09 12:49:44 +01:00
early_printk.c
usb: early: xhci-dbc: Remove duplicate keep parsing
2022-03-15 18:20:34 +01:00
early-quirks.c
drm/i915/rpl-p: Add PCI IDs
2022-04-19 17:14:09 -07:00
ebda.c
…
eisa.c
…
espfix_64.c
…
ftrace_32.S
x86: Prepare asm files for straight-line-speculation
2021-12-08 12:25:37 +01:00
ftrace_64.S
x86/ftrace: Remove OBJECT_FILES_NON_STANDARD usage
2022-06-06 11:50:22 -07:00
ftrace.c
x86/ftrace: Use alternative RET encoding
2022-06-27 10:33:58 +02:00
head32.c
…
head64.c
Merge tag 'x86_tdx_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2022-05-23 17:51:12 -07:00
head_32.S
x86: Prepare asm files for straight-line-speculation
2021-12-08 12:25:37 +01:00
head_64.S
objtool: Add entry UNRET validation
2022-06-27 10:34:00 +02:00
hpet.c
rtc: Check return value from mc146818_get_time()
2021-12-16 21:50:06 +01:00
hw_breakpoint.c
…
i8237.c
…
i8253.c
…
i8259.c
x86: Avoid magic number with ELCR register accesses
2021-08-10 23:31:43 +02:00
idt.c
x86/traps: Add #VE support for TDX guest
2022-04-07 08:27:51 -07:00
io_delay.c
…
ioport.c
…
irq_32.c
x86/softirq: Disable softirq stacks on PREEMPT_RT
2021-09-27 12:28:32 +02:00
irq_64.c
…
irq_work.c
…
irq.c
x86/irq: Ensure PI wakeup handler is unregistered before module unload
2021-10-22 12:45:35 -04:00
irqflags.S
x86: Prepare asm files for straight-line-speculation
2021-12-08 12:25:37 +01:00
irqinit.c
…
itmt.c
x86/sched: Decrease further the priorities of SMT siblings
2021-10-05 15:51:59 +02:00
jailhouse.c
…
jump_label.c
jump_labels: Mark __jump_label_transform() as __always_inlined to work around aggressive compiler un-inlining
2021-07-13 06:32:05 +02:00
kdebugfs.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-09 12:49:44 +01:00
kexec-bzimage64.c
x86: Use ELF fields defined in 'struct kimage'
2021-03-08 12:06:29 -07:00
kgdb.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
ksysfs.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-09 12:49:44 +01:00
kvm.c
x86, kvm: use correct GFP flags for preemption disabled
2022-05-25 05:13:40 -04:00
kvmclock.c
x86/kvm: Don't waste kvmclock memory if there is nopv parameter
2022-04-13 13:37:19 -04:00
ldt.c
memcg: enable accounting for ldt_struct objects
2021-09-03 09:58:13 -07:00
machine_kexec_32.c
x86/kexec: Set_[gi]dt() -> native_[gi]dt_invalidate() in machine_kexec_*.c
2021-05-21 12:36:45 +02:00
machine_kexec_64.c
x86/kexec: fix memory leak of elf header buffer
2022-06-01 15:57:16 -07:00
Makefile
x86/ftrace: Remove OBJECT_FILES_NON_STANDARD usage
2022-06-06 11:50:22 -07:00
mmconf-fam10h_64.c
x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG
2021-05-10 07:51:38 +02:00
module.c
x86: Undo return-thunk damage
2022-06-27 10:33:58 +02:00
mpparse.c
x86: Avoid magic number with ELCR register accesses
2021-08-10 23:31:43 +02:00
msr.c
…
nmi_selftest.c
…
nmi.c
x86/nmi: Make register_nmi_handler() more robust
2022-05-17 09:25:25 +02:00
paravirt-spinlocks.c
x86/paravirt: Add new features for paravirt patching
2021-03-11 19:51:49 +01:00
paravirt.c
x86/ibt,paravirt: Sprinkle ENDBR
2022-03-15 10:32:36 +01:00
pci-dma.c
swiotlb: merge swiotlb-xen initialization into swiotlb
2022-04-18 07:21:13 +02:00
pcspeaker.c
…
perf_regs.c
…
platform-quirks.c
…
pmem.c
…
probe_roms.c
x86/kernel: Validate ROM memory before accessing when SEV-SNP is active
2022-04-06 13:23:09 +02:00
process_32.c
Merge tag 'x86_core_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2022-05-23 18:42:07 -07:00
process_64.c
x86/prctl: Remove pointless task argument
2022-05-13 12:56:28 +02:00
process.c
x86/bugs: Optimize SPEC_CTRL MSR writes
2022-06-27 10:33:59 +02:00
process.h
x86: Snapshot thread flags
2021-12-01 00:06:43 +01:00
ptrace.c
x86/32: Remove lazy GS macros
2022-04-14 14:09:43 +02:00
pvclock.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
quirks.c
…
reboot_fixups_32.c
…
reboot.c
x86: Use do_kernel_power_off()
2022-05-19 19:30:31 +02:00
relocate_kernel_32.S
x86: Prepare asm files for straight-line-speculation
2021-12-08 12:25:37 +01:00
relocate_kernel_64.S
x86/ibt: Annotate text references
2022-03-15 10:32:40 +01:00
resource.c
x86/PCI: Revert "x86/PCI: Clip only host bridge windows for E820 regions"
2022-06-17 14:24:14 -05:00
rethook.c
x86,rethook: Fix arch_rethook_trampoline() to generate a complete pt_regs
2022-03-28 19:38:51 -07:00
rtc.c
…
setup_percpu.c
mm: percpu: add generic pcpu_populate_pte() function
2022-01-20 08:52:52 +02:00
setup.c
x86/mm: Fix RESERVE_BRK() for older binutils
2022-06-13 10:15:04 +02:00
sev_verify_cbit.S
x86: Prepare asm files for straight-line-speculation
2021-12-08 12:25:37 +01:00
sev-shared.c
x86/sev: Remove duplicated assignment to variable info
2022-05-17 12:52:37 +02:00
sev.c
x86/sev: Fix address space sparse warning
2022-05-02 17:34:29 +02:00
signal_compat.c
signal: Deliver SIGTRAP on perf event asynchronously if blocked
2022-04-22 12:14:05 +02:00
signal.c
x86/32: Remove lazy GS macros
2022-04-14 14:09:43 +02:00
smp.c
x86: Fix various typos in comments, take #2
2021-03-21 23:50:28 +01:00
smpboot.c
Merge tag 'x86_cleanups_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2022-05-23 18:17:09 -07:00
stacktrace.c
x86: remove __range_not_ok()
2022-02-25 09:36:05 +01:00
static_call.c
x86/retbleed: Add fine grained Kconfig knobs
2022-06-29 17:43:41 +02:00
step.c
ptrace: Reimplement PTRACE_KILL by always sending SIGKILL
2022-05-11 14:34:28 -05:00
sys_ia32.c
…
sys_x86_64.c
x86/mm: Cleanup the control_va_addr_alignment() __setup handler
2022-05-04 18:20:42 +02:00
tboot.c
x86: remove the IOMMU table infrastructure
2022-04-18 07:21:10 +02:00
time.c
…
tls.c
x86/stackprotector/32: Make the canary into a regular percpu variable
2021-03-08 13:19:05 +01:00
tls.h
…
topology.c
drivers/base/node: consolidate node device subsystem initialization in node_dev_init()
2022-03-22 15:57:10 -07:00
trace_clock.c
…
trace.c
trace/osnoise: Fix an ifdef comment
2021-10-25 23:02:36 -04:00
tracepoint.c
x86/traceponit: Fix comment about irq vector tracepoints
2022-05-26 22:03:52 -04:00
traps.c
Merge tag 'x86_asm_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2022-05-23 18:08:46 -07:00
tsc_msr.c
…
tsc_sync.c
x86/tsc: Add a timer to make sure TSC_adjust is always checked
2021-12-02 00:40:35 +01:00
tsc.c
x86/tsc: Be consistent about use_tsc_delay()
2022-03-15 18:20:33 +01:00
umip.c
x86/umip: Downgrade warning messages to debug loglevel
2021-09-25 13:23:28 +02:00
unwind_frame.c
x86/unwind: Recover kretprobe trampoline entry
2021-09-30 21:24:07 -04:00
unwind_guess.c
x86/unwind: Recover kretprobe trampoline entry
2021-09-30 21:24:07 -04:00
unwind_orc.c
x86/unwind/orc: Recheck address range after stack info was updated
2022-04-19 21:58:46 +02:00
uprobes.c
x86/uprobes: Convert to insn_decode()
2021-03-15 12:05:03 +01:00
verify_cpu.S
x86: Prepare asm files for straight-line-speculation
2021-12-08 12:25:37 +01:00
vm86_32.c
x86/32: Remove lazy GS macros
2022-04-14 14:09:43 +02:00
vmlinux.lds.S
x86: Add magic AMD return-thunk
2022-06-27 10:33:59 +02:00
vsmp_64.c
…
x86_init.c
x86/mm/cpa: Generalize __set_memory_enc_pgtable()
2022-02-23 19:14:29 +01:00