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0e0779da22
linux/arch/arm/include/asm
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Lorenzo Pieralisi 0e0779da22 ARM: 8053/1: kernel: sleep: restore HYP mode configuration in cpu_resume 
On CPUs with virtualization extensions the kernel installs HYP mode
configuration on both primary and secondary cpus upon cold boot.

On platforms where CPUs are shutdown in idle paths (ie CPU core gating),
when a CPU resumes from low-power states it currently does not execute
code that reinstalls the HYP configuration, which means that the kernel
cannot run eg KVM properly on such machines.

This patch, mirroring cold-boot behaviour, executes position independent
code that reinstalls HYP configuration and drops to SVC mode safely on
warmboot, so that deep idle states can be enabled in kernel running as
hosts on platforms with power management HW.

Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Dave Martin <dave.martin@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-05-25 23:49:27 +01:00
..
hardware ARM: MM: Add DT binding for Feroceon L2 cache 2014-02-22 20:43:49 +00:00
mach ARM: implement basic NX support for kernel lowmem mappings 2013-12-11 09:53:16 +00:00
xen xen/grant-table: Refactor gnttab_[un]map_refs to avoid m2p_override 2014-03-18 14:40:19 +00:00
arch_timer.h ARM: arch_timer: add support to configure and enable event stream 2013-09-26 09:47:26 +01:00
asm-offsets.h
assembler.h ARM: 8053/1: kernel: sleep: restore HYP mode configuration in cpu_resume 2014-05-25 23:49:27 +01:00
atomic.h ARM: 7983/1: atomics: implement a better __atomic_add_unless for v6+ 2014-02-25 11:35:08 +00:00
barrier.h arch: Introduce smp_load_acquire(), smp_store_release() 2014-01-12 10:37:17 +01:00
bitops.h ARM: fix ffs/fls implementations to match x86 2014-01-13 23:34:56 +00:00
bL_switcher.h ARM: bL_switcher: Add query interface to discover CPU affinities 2013-09-23 18:47:31 -04:00
bug.h ARM: Correct BUG() assembly to ensure it is endian-agnostic 2013-10-19 20:46:35 +01:00
bugs.h
cache.h
cacheflush.h ARM: 8043/1: uprobes need icache flush after xol write 2014-05-25 23:48:45 +01:00
cachetype.h ARM: 7062/1: cache: detect PIPT I-cache using CTR 2011-10-17 09:13:41 +01:00
checksum.h ARM: fix csum_tcpudp_magic() miscompilation 2013-12-29 12:32:41 +00:00
clkdev.h clk: Add common __clk_get(), __clk_put() implementations 2013-12-04 17:19:44 +01:00
cmpxchg.h ARM: 7984/1: prefetch: add prefetchw invocations for barriered atomics 2014-02-25 11:30:20 +00:00
compiler.h Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
cp15.h Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-07-03 09:46:29 -07:00
cpu.h ARM: kernel: add MIDR to per-CPU information data 2012-11-19 14:51:11 +00:00
cpuidle.h cpuidle: Add common time keeping and irq enabling 2012-03-21 01:59:40 -04:00
cputype.h ARM: 8046/1: proc: add support for the Cortex-A17 processor 2014-05-25 23:47:45 +01:00
cti.h ARM: coresight: common definition for (OS) Lock Access Register key value 2013-01-10 21:13:05 +00:00
delay.h ARM: 7685/1: delay: use private ticks_per_jiffy field for timer-based delay ops 2013-04-03 16:45:50 +01:00
device.h ARM: dma-mapping: Add macro to_dma_iommu_mapping() 2013-02-25 15:30:41 +01:00
div64.h ARM: 7705/1: use optimized do_div only for EABI 2013-05-15 19:35:53 +01:00
dma-contiguous.h drivers: dma-contiguous: clean source code and prepare for device tree 2013-08-27 09:18:29 +02:00
dma-iommu.h arm: dma-mapping: remove order parameter from arm_iommu_create_mapping() 2014-02-28 11:55:18 +01:00
dma-mapping.h Features: 2013-11-15 13:34:37 +09:00
dma.h mm/memblock: add memblock memory allocation apis 2014-01-21 16:19:46 -08:00
domain.h ARM: fix set_domain() macro 2012-07-05 09:50:55 +01:00
ecard.h ARM: io: ecard: move ioaddr() inside __ecard_address 2011-08-17 08:44:16 +01:00
edac.h ARM: 7201/1: add EDAC atomic_scrub function 2011-12-11 08:35:50 +00:00
elf.h Move the EM_ARM and EM_AARCH64 definitions to uapi/linux/elf-em.h 2013-09-02 16:35:50 +01:00
entry-macro-multi.S ARM: gic: consolidate PPI handling 2011-10-23 13:32:29 +01:00
exception.h ARM: 7115/4: move __exception and friends to asm/exception.h 2011-10-17 09:02:44 +01:00
fb.h
fiq.h ARM: 6940/1: fiq: Briefly document driver responsibilities for suspend/resume 2011-05-26 10:31:06 +01:00
firmware.h ARM: firmware: add prepare_idle() operation 2014-02-18 13:46:42 -07:00
fixmap.h ARM: 8031/2: change fixmap mapping region to support 32 CPUs 2014-04-23 11:09:42 +01:00
flat.h ARM: binfmt_flat: unused variable 'persistent' 2012-10-09 20:29:06 +02:00
floppy.h ARM: 7996/1: floppy.h: remove deprecated IRQF_DISABLED 2014-03-12 10:32:29 +00:00
fncpy.h
fpstate.h
ftrace.h
futex.h ARM: 7984/1: prefetch: add prefetchw invocations for barriered atomics 2014-02-25 11:30:20 +00:00
glue-cache.h Merge branch 'for-next' of git://git.pengutronix.de/git/ukl/linux into devel-stable 2013-05-22 10:52:24 +01:00
glue-df.h ARM: Add base support for ARMv7-M 2013-04-17 21:38:10 +02:00
glue-pf.h
glue-proc.h ARM SoC specific changes 2013-07-02 13:43:38 -07:00
glue.h
gpio.h ARM: make mach/gpio.h headers optional 2012-09-14 09:21:59 -05:00
hardirq.h Merge branch 'devel-stable' into for-next 2013-11-12 10:58:59 +00:00
highmem.h ARM: 8031/2: change fixmap mapping region to support 32 CPUs 2014-04-23 11:09:42 +01:00
hugetlb-3level.h ARM: mm: HugeTLB support for LPAE systems. 2013-06-04 16:52:37 +01:00
hugetlb.h ARM: mm: HugeTLB support for LPAE systems. 2013-06-04 16:52:37 +01:00
hw_breakpoint.h ARM: 7948/1: hw_breakpoint: Add ARMv8 support 2014-02-10 11:48:05 +00:00
hw_irq.h
hwcap.h ARM: 7981/1: add support for AT_HWCAP2 ELF auxv entry 2014-02-25 11:40:48 +00:00
hypervisor.h arm: initial Xen support 2012-09-14 13:53:39 +00:00
ide.h
idmap.h ARM: KVM: move to a KVM provided HYP idmap 2013-04-28 22:23:08 -07:00
io.h ARM: 7930/1: Introduce atomic MMIO modify 2014-01-28 14:06:25 +00:00
irq.h arm: Move the set_handle_irq and handle_arch_irq declarations to asm/irq.h 2013-03-26 16:11:20 +00:00
irqflags.h ARM: Add base support for ARMv7-M 2013-04-17 21:38:10 +02:00
jump_label.h ARM: 7989/1: Delete asm/system.h 2014-02-25 11:33:37 +00:00
Kbuild locking/mcs: Allow architecture specific asm files to be used for contended case 2014-02-09 21:18:52 +01:00
kexec.h
kgdb.h ARM: kdgb: use <asm/opcodes.h> for data to be assembled as intruction 2013-10-19 20:46:35 +01:00
kmap_types.h arm: remove km_type definitions 2012-07-24 15:27:28 +08:00
kprobes.h ARM: Make arch_specific_insn a define for new arch_probes_insn structure 2014-03-18 16:39:40 -04:00
kvm_arm.h ARM: KVM: trap VM system registers until MMU and caches are ON 2014-03-03 01:15:24 +00:00
kvm_asm.h ARM: KVM: add world-switch for AMAIR{0,1} 2014-03-03 01:15:24 +00:00
kvm_coproc.h KVM: ARM: User space API for getting/setting co-proc registers 2013-01-23 13:29:14 -05:00
kvm_emulate.h A handful of fixes for KVM/arm64: 2013-11-11 12:05:20 +01:00
kvm_host.h ARM: KVM: introduce per-vcpu HYP Configuration Register 2014-03-03 01:15:23 +00:00
kvm_mmio.h KVM: ARM: Handle I/O aborts 2013-01-23 13:29:17 -05:00
kvm_mmu.h ARM: KVM: force cache clean on page fault when caches are off 2014-03-03 01:15:22 +00:00
kvm_psci.h KVM: ARM: Power State Coordination Interface implementation 2013-01-23 13:29:18 -05:00
limits.h
linkage.h
mach-types.h
mc146818rtc.h ARM: mc146818rtc: remove unnecessary include of mach/irqs.h 2012-01-25 20:37:45 -06:00
mcpm.h ARM: 8029/1: mcpm: Rename the power_down_finish() functions to be less confusing 2014-05-25 23:48:12 +01:00
memblock.h ARM: constify machine_desc structure uses 2013-07-26 14:55:59 +01:00
memory.h ARM: 8023/1: remove remnants of the static DMA mapping 2014-04-23 01:24:33 +01:00
mmu_context.h ARM: 7790/1: Fix deferred mm switch on VIVT processors 2013-07-26 12:02:09 +01:00
mmu.h ARM: tlb: ASID macro should give 32bit result for BE correct operation 2013-10-19 20:46:36 +01:00
module.h ARM: 7829/1: Add ".text.unlikely" and ".text.hot" to arm unwind tables 2013-09-02 13:49:47 +01:00
mpu.h ARM: mpu: protect the vectors page with an MPU region 2013-06-17 15:13:18 +01:00
mtd-xip.h
mutex.h ARM: 7495/1: mutex: use generic atomic_dec-based implementation for ARMv6+ 2012-08-25 09:22:31 +01:00
neon.h ARM: add support for kernel mode NEON 2013-07-08 22:08:51 +01:00
nwflash.h
opcodes-sec.h ARM: opcodes: add opcodes definitions for ARM security extensions 2013-01-10 21:10:20 +00:00
opcodes-virt.h ARM: opcodes: add __ERET/__MSR_ELR_HYP instruction encoding 2012-09-19 08:32:49 +01:00
opcodes.h ARM: opcodes: add missing include of linux/linkage.h 2013-01-10 21:10:20 +00:00
outercache.h ARM: move outer_cache declaration out of ifdef 2013-08-22 20:48:41 -05:00
page-nommu.h
page.h ARM: make vectors page inaccessible from userspace 2013-08-01 14:31:58 +01:00
pci.h ARM: PCI: add legacy IDE IRQ implementation 2013-12-29 12:44:10 +00:00
percpu.h ARM: 7747/1: pcpu: ensure __my_cpu_offset cannot be re-ordered across barrier() 2013-06-05 23:35:56 +01:00
perf_event.h ARM: 7584/1: perf: fix link error when CONFIG_HW_PERF_EVENTS is not selected 2012-11-23 13:01:30 +00:00
pgalloc.h arm: handle pgtable_page_ctor() fail 2013-11-15 09:32:16 +09:00
pgtable-2level-hwdef.h ARM: 7077/1: LPAE: Use a mask for physical addresses in page table entries 2011-10-06 15:40:06 +01:00
pgtable-2level-types.h ARM: 7076/1: LPAE: Add (pte|pmd)val_t type definitions as u32 2011-10-06 15:40:05 +01:00
pgtable-2level.h ARM: 7954/1: mm: remove remaining domain support from ARMv6 2014-02-10 11:48:13 +00:00
pgtable-3level-hwdef.h Merge branch 'for-rmk/lpae' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable 2013-06-18 20:11:32 +01:00
pgtable-3level-types.h ARM: LPAE: Introduce the 3-level page table format definitions 2011-12-08 10:30:39 +00:00
pgtable-3level.h ARM: 7950/1: mm: Fix stage-2 device memory attributes 2014-02-10 11:44:05 +00:00
pgtable-hwdef.h ARM: LPAE: Introduce the 3-level page table format definitions 2011-12-08 10:30:39 +00:00
pgtable-nommu.h consolidate io_remap_pfn_range definitions 2013-06-29 12:46:35 +04:00
pgtable.h ARM: 7985/1: mm: implement pte_accessible for faulting mappings 2014-02-25 11:32:40 +00:00
pmu.h ARM: perf: add hook for event index clearing 2014-02-21 11:11:08 +00:00
probes.h ARM: Make arch_specific_insn a define for new arch_probes_insn structure 2014-03-18 16:39:40 -04:00
proc-fns.h Merge branch 'for-rmk/lpae' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable 2013-06-18 20:11:32 +01:00
processor.h ARM: prefetch: add support for prefetchw using pldw on SMP ARMv7+ CPUs 2013-09-30 16:42:55 +01:00
procinfo.h
prom.h of: remove HAVE_ARCH_DEVTREE_FIXUPS 2013-10-09 20:04:08 -05:00
psci.h arm: introduce psci_smp_ops 2013-05-21 14:24:11 +00:00
ptrace.h Merge branch 'uprobes-v7' of git://git.linaro.org/people/dave.long/linux into devel-stable 2014-03-19 20:15:46 +00:00
scatterlist.h ARM: Allow SoCs to enable scatterlist chaining 2011-06-02 11:16:22 +01:00
seccomp.h
setup.h ARM: 7863/1: Let arm_add_memory() always use 64-bit arguments 2013-10-29 11:06:28 +00:00
shmparam.h
signal.h arm: switch to generic old sigaction() 2013-02-03 18:15:47 -05:00
smp_plat.h ARM: 7807/1: kexec: validate CPU hotplug support 2013-08-13 20:23:18 +01:00
smp_scu.h ARM: scu: provide inline dummy functions when SCU is not present 2013-07-04 05:10:51 -07:00
smp_twd.h ARM: smp_twd: convert to use CLKSRC_OF init 2013-03-11 08:42:08 -05:00
smp.h ARM: SoC specific changes 2014-04-05 14:19:54 -07:00
sparsemem.h
spinlock_types.h ARM: locks: prefetch the destination word for write prior to strex 2013-09-30 16:42:55 +01:00
spinlock.h ARM: 7955/1: spinlock: ensure we have a compiler barrier before sev 2014-02-10 11:44:50 +00:00
stackprotector.h
stacktrace.h
string.h
suspend.h ARM: kernel: implement stack pointer save array through MPIDR hashing 2013-06-20 11:24:11 +01:00
swab.h UAPI: (Scripted) Disintegrate arch/arm/include/asm 2012-10-12 13:05:52 +01:00
switch_to.h ARM: spinlock: use inner-shareable dsb variant prior to sev instruction 2013-08-12 12:25:45 +01:00
sync_bitops.h ARM: 7989/1: Delete asm/system.h 2014-02-25 11:33:37 +00:00
syscall.h audit: use uapi/linux/audit.h for AUDIT_ARCH declarations 2014-03-20 10:11:59 -04:00
system_info.h ARM: Add base support for ARMv7-M 2013-04-17 21:38:10 +02:00
system_misc.h reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
tcm.h ARM: 6985/1: export functions to determine the presence of I/DTCM 2011-07-06 20:49:45 +01:00
therm.h
thread_info.h ARM: add uprobes support 2014-03-18 16:39:40 -04:00
thread_notify.h
timex.h ARM: drop <mach/timex.h> for !ARCH_MULTIPLATFORM, too 2013-12-20 17:17:16 +01:00
tlb.h Fix TLB gather virtual address range invalidation corner cases 2013-08-16 08:52:46 -07:00
tlbflush.h ARM: 7855/1: Add check for Cortex-A15 errata 798181 ECO 2013-10-29 11:06:13 +00:00
tls.h ARM: 7735/2: Preserve the user r/w register TPIDRURW on context switch and fork 2013-06-24 15:21:59 +01:00
topology.h sched: Remove unused mc_capable() and smt_capable() 2014-03-11 12:05:45 +01:00
traps.h ARM: earlier initialization of vectors page 2012-01-23 10:24:11 +00:00
trusted_foundations.h ARM: trusted_foundations: fallback when TF support is missing 2014-02-18 13:46:32 -07:00
types.h ARM: 7822/1: add workaround for ambiguous C99 stdint.h types 2013-08-25 17:09:46 +01:00
uaccess.h ARM: 7951/1: uaccess: use CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 2014-02-10 11:48:10 +00:00
ucontext.h
unified.h ARM: smp_on_up: move inline asm ALT_SMP patching macro out of spinlock.h 2013-09-30 16:42:55 +01:00
unistd.h ARM: 8007/1: Remove extraneous kcmp syscall ignore 2014-03-19 20:20:37 +00:00
unwind.h ARM: 7187/1: fix unwinding for XIP kernels 2011-12-06 11:16:13 +00:00
uprobes.h ARM: add uprobes support 2014-03-18 16:39:40 -04:00
user.h
v7m.h ARM: 7828/1: ARMv7-M: implement restart routine common to all v7-M machines 2013-09-02 13:49:29 +01:00
vfp.h
vfpmacros.h ARM: 7566/1: vfp: fix save and restore when running on pre-VFPv3 and CONFIG_VFPv3 set 2012-10-29 10:04:05 +00:00
vga.h ARM: set vga memory base at run-time 2011-07-12 11:19:29 -05:00
virt.h ARM: 7787/1: virt: ensure visibility of __boot_cpu_mode 2013-07-26 12:01:17 +01:00
word-at-a-time.h ARM: 7927/1: dcache: select DCACHE_WORD_ACCESS for big-endian CPUs 2013-12-29 12:46:50 +00:00
xor.h ARM: crypto: add NEON accelerated XOR implementation 2013-07-08 22:09:06 +01:00