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35a2d58588
linux/arch/arm/include/asm
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Christoffer Dall 35a2d58588 KVM: arm/arm64: vgic-new: Synchronize changes to active state 
When modifying the active state of an interrupt via the MMIO interface,
we should ensure that the write has the intended effect.

If a guest sets an interrupt to active, but that interrupt is already
flushed into a list register on a running VCPU, then that VCPU will
write the active state back into the struct vgic_irq upon returning from
the guest and syncing its state.  This is a non-benign race, because the
guest can observe that an interrupt is not active, and it can have a
reasonable expectations that other VCPUs will not ack any IRQs, and then
set the state to active, and expect it to stay that way.  Currently we
are not honoring this case.

Thefore, change both the SACTIVE and CACTIVE mmio handlers to stop the
world, change the irq state, potentially queue the irq if we're setting
it to active, and then continue.

We take this chance to slightly optimize these functions by not stopping
the world when touching private interrupts where there is inherently no
possible race.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2016-05-20 16:26:38 +02:00
..
hardware ARM: uniphier: add outer cache support 2015-10-27 09:20:50 +09:00
mach ARM: implement create_mapping_late() for EFI use 2015-12-13 19:18:29 +01:00
xen xen: features and fixes for 4.6-rc0 2016-03-22 12:55:17 -07:00
arch_gicv3.h irqchip/gic-v3: Add missing barrier to 32bit version of gic_read_iar() 2016-02-18 19:15:45 +00:00
arch_timer.h clocksource: arch_timer: Fix code to use physical timers when requested 2014-12-04 23:30:26 -08:00
arm-cci.h arm-cci: Get rid of secure transactions for PMU driver 2015-03-27 13:44:35 +00:00
asm-offsets.h
assembler.h Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-14 12:24:10 -07:00
atomic.h ARM, locking/atomics: Implement _relaxed variants of atomic[64]_{inc,dec} 2015-10-20 10:17:23 +02:00
auxvec.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
barrier.h arm: define __smp_xxx 2016-01-12 20:46:54 +02:00
bitops.h ARM: 8417/1: refactor bitops functions with BIT_MASK() and BIT_WORD() 2015-08-18 14:00:30 +01:00
bitrev.h ARM: 8287/1: add bitrev.h file to support rbit instruction 2015-01-16 14:06:18 +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: 8455/1: define __BUG as asm(BUG_INSTR) without CONFIG_BUG 2015-12-03 00:02:29 +00:00
bugs.h
cache.h
cacheflush.h asm-generic: Consolidate mark_rodata_ro() 2016-02-22 08:51:37 +01:00
cachetype.h
checksum.h ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short 2016-03-13 23:55:13 -04:00
cmpxchg.h ARM: 8443/1: Adding support for atomic half word exchange 2015-10-09 16:22:54 +01:00
compiler.h ARM: 8300/1: teach __asmeq that r11 == fp and r12 == ip 2015-02-10 10:23:11 +00:00
cp15.h ARM: remove global cr_no_alignment 2014-06-02 09:20:18 +01:00
cpu.h
cpuidle.h ARM: 8485/1: cpuidle: remove cpu parameter from the cpuidle_ops suspend hook 2015-12-22 12:09:43 +00:00
cputype.h ARM: make xscale iwmmxt code multiplatform aware 2015-12-01 21:44:24 +01:00
cti.h
dcc.h ARM: tty: Move HVC DCC assembly to arch/arm 2014-05-28 13:33:18 -07:00
delay.h
device.h arm: introduce is_device_dma_coherent 2014-12-04 12:41:50 +00:00
div64.h ARM: 8504/1: __arch_xprod_64(): small optimization 2016-02-11 15:33:37 +00:00
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: 8347/1: dma-mapping: fix off-by-one check in arm_setup_iommu_dma_ops 2015-05-03 23:21:55 +01:00
dma-mapping.h dma-mapping: always provide the dma_map_ops based implementation 2016-01-20 17:09:18 -08:00
dma.h remove <asm/scatterlist.h> 2015-05-05 13:35:39 -06:00
domain.h ARM: domains: add memory dependencies to get_domain/set_domain 2015-09-11 16:08:18 +01:00
ecard.h
edac.h EDAC: Cleanup atomic_scrub mess 2015-05-28 15:31:53 +02:00
efi.h ARM: add UEFI stub support 2015-12-14 10:38:21 +01:00
elf.h Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-04-14 21:03:26 -07:00
entry-macro-multi.S ARM: replace BSYM() with badr assembly macro 2015-05-08 17:33:50 +01:00
exception.h arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections 2016-03-25 16:37:42 -07:00
fb.h
fiq.h
firmware.h ARM: EXYNOS: add exynos_get_boot_addr() helper 2015-06-06 02:17:56 +09:00
fixmap.h ARM: add support for generic early_ioremap/early_memremap 2015-12-13 19:18:28 +01:00
flat.h
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 ARM: 8158/1: LLVMLinux: use static inline in ARM ftrace.h 2014-09-26 14:40:03 +01:00
futex.h ARM: uaccess: provide uaccess_save_and_enable() and uaccess_restore() 2015-08-25 16:14:43 +01:00
glue-cache.h ARM: reduce visibility of dmac_* functions 2015-08-01 22:25:04 +01:00
glue-df.h ARM: 8065/1: remove last use of CONFIG_CPU_ARM710 2014-05-30 01:12:30 +01:00
glue-pf.h
glue-proc.h ARM: 8103/1: save/restore Cortex-A9 CP15 registers on suspend/resume 2014-07-18 12:29:37 +01:00
glue.h
gpio.h ARM: delete old reference to ARM_GPIOLIB_COMPLEX 2014-06-30 21:37:39 +02:00
hardirq.h ARM: 8487/1: Remove IPI_CALL_FUNC_SINGLE 2015-12-22 12:09:43 +00:00
highmem.h kmap_atomic_to_page() has no users, remove it 2015-11-09 15:11:24 -08:00
hugetlb-3level.h ARM: mm: HugeTLB support for LPAE systems. 2013-06-04 16:52:37 +01:00
hugetlb.h mm/hugetlb: remove arch_prepare/release_hugepage from arch headers 2015-06-25 17:00:35 -07:00
hw_breakpoint.h ARM: 7948/1: hw_breakpoint: Add ARMv8 support 2014-02-10 11:48:05 +00:00
hw_irq.h ARM: Remove ununsed set_irq_flags 2015-09-16 16:53:39 +02:00
hwcap.h ARM: 7981/1: add support for AT_HWCAP2 ELF auxv entry 2014-02-25 11:40:48 +00:00
hypervisor.h
ide.h
idmap.h ARM: KVM: move to a KVM provided HYP idmap 2013-04-28 22:23:08 -07:00
insn.h ARM: kprobes: enable OPTPROBES for ARM 32 2015-01-13 16:10:17 +00:00
io.h ARM: avoid unwanted GCC memset()/memcpy() optimisations for IO variants 2015-07-03 20:46:15 +01:00
irq_work.h arm: Tell irq work about self IPI support 2014-09-13 18:38:39 +02:00
irq.h xen/events: Always allocate legacy interrupts on PV guests 2015-11-26 18:05:01 +00:00
irqflags.h ARM: 8422/1: enable imprecise aborts during early kernel startup 2015-09-22 08:13:56 +01:00
jump_label.h locking/static_keys: Add a new static_key interface 2015-08-03 11:34:15 +02:00
Kbuild ARM: SoC cleanups for v4.6 2016-03-20 14:37:22 -07:00
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
kprobes.h ARM: optprobes: execute instruction during restoring if possible. 2015-01-14 12:24:52 +00:00
kvm_arm.h arm64: KVM: Add support for 16-bit VMID 2015-12-18 10:15:12 +00:00
kvm_asm.h arm64 updates for 4.6: 2016-03-17 20:03:47 -07:00
kvm_coproc.h
kvm_emulate.h arm/arm64: KVM: Handle out-of-RAM cache maintenance as a NOP 2016-02-29 18:34:15 +00:00
kvm_host.h KVM: arm/arm64: vgic-new: Synchronize changes to active state 2016-05-20 16:26:38 +02:00
kvm_hyp.h ARM: KVM: Use common version of timer-sr.c 2016-02-29 18:34:19 +00:00
kvm_mmio.h KVM: arm/arm64: Export mmio_read/write_bus 2016-05-20 15:39:42 +02:00
kvm_mmu.h kvm: arm64: Enable hardware updates of the Access Flag for Stage 2 page tables 2016-05-09 22:23:08 +02:00
kvm_psci.h ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible 2014-04-30 04:18:57 -07:00
limits.h
linkage.h
mach-types.h
mc146818rtc.h
mcpm.h ARM: MCPM: remove residency argument from mcpm_cpu_suspend() 2015-05-06 11:47:10 -04:00
mcs_spinlock.h ARM: 8098/1: mcs lock: implement wfe-based polling for MCS locking 2014-07-18 12:29:35 +01:00
memblock.h ARM: 8025/1: Get rid of meminfo 2014-06-01 01:17:12 +01:00
memory.h ARM: 8530/1: remove VIRT_TO_BUS 2016-02-22 16:55:42 +00:00
mmu_context.h ARM: 8531/1: turn init_new_context into an inline function 2016-02-22 16:55:42 +00:00
mmu.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
module.h ARM: 8220/1: allow modules outside of bl range 2015-05-08 10:42:34 +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
neon.h ARM: add support for kernel mode NEON 2013-07-08 22:08:51 +01:00
nwflash.h
opcodes-sec.h
opcodes-virt.h
opcodes.h
outercache.h ARM: move heavy barrier support out of line 2015-07-25 15:28:05 +01:00
page-nommu.h asm-generic: page.h: Remove useless get_user_page and free_user_page 2016-02-26 15:24:55 +01:00
page.h ARM: make vectors page inaccessible from userspace 2013-08-01 14:31:58 +01:00
paravirt.h arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops 2015-12-21 14:40:54 +00:00
patch.h ARM: probes: move all probe code to dedicate directory 2015-01-09 09:36:50 +00:00
pci.h PCI: Move pci_dma_* helpers to common code 2016-03-07 10:40:02 -06:00
percpu.h ARM: 8174/1: Use global stack register variable for percpu 2014-11-13 23:58:06 +00:00
perf_event.h arm: perf: Fix callchain parse error with kernel tracepoint events 2015-05-27 16:12:05 +01:00
pgalloc.h ARM: 8235/1: Support for the PXN CPU feature on ARMv7 2014-12-03 15:57:45 +00:00
pgtable-2level-hwdef.h ARM: domains: keep vectors in separate domain 2015-08-21 13:55:53 +01:00
pgtable-2level-types.h
pgtable-2level.h ARM: pgtable: document mapping types 2015-07-03 17:06:57 +01:00
pgtable-3level-hwdef.h ARM: 8235/1: Support for the PXN CPU feature on ARMv7 2014-12-03 15:57:45 +00:00
pgtable-3level-types.h
pgtable-3level.h arch/arm/include/asm/pgtable-3level.h: add pmd_mkclean for THP 2016-01-15 17:56:32 -08:00
pgtable-hwdef.h
pgtable-nommu.h mm: make FIRST_USER_ADDRESS unsigned long on all archs 2015-02-11 17:06:03 -08:00
pgtable.h ARM: 8432/1: move VMALLOC_END from 0xff000000 to 0xff800000 2015-09-22 08:13:57 +01:00
probes.h ARM: optprobes: execute instruction during restoring if possible. 2015-01-14 12:24:52 +00:00
proc-fns.h ARM: redo TTBR setup code for LPAE 2015-06-01 23:48:19 +01:00
processor.h arch, locking: Ciao arch_mutex_cpu_relax() 2014-07-17 12:32:47 +02:00
procinfo.h
prom.h of/fdt: move memreserve and dtb memory reservations into core 2014-04-30 00:59:17 -05:00
psci.h ARM: SoC cleanups for v4.5 2016-01-20 17:55:20 -08:00
ptrace.h ARM: 8175/1: Use current_stack_pointer to calculate pt_regs address 2014-11-13 23:58:07 +00:00
sections.h ARM: 8518/1: Use correct symbols for XIP_KERNEL 2016-02-11 15:43:14 +00:00
setup.h ARM: 8495/1: ATAGS: move save_atags() to arch/arm/include/asm/setup.h 2016-01-04 11:26:00 +00:00
shmparam.h
signal.h
smp_plat.h ARM: 8392/3: smp: Only expose /sys/.../cpuX/online if hotpluggable 2015-07-31 18:58:30 +01:00
smp_scu.h ARM: make it easier to check the CPU part number correctly 2014-07-18 12:29:02 +01:00
smp_twd.h
smp.h ARM: 8423/1: add const qualifier to smp_operations member in structures 2015-09-22 08:13:57 +01:00
sparsemem.h ARM: 8411/1: Add default SPARSEMEM settings 2016-02-16 16:35:21 +00:00
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/spinlock: Replace ACCESS_ONCE with READ_ONCE 2014-12-18 09:54:40 +01:00
stackprotector.h
stacktrace.h ARM: 8070/1: Introduce arm_get_current_stack_frame() 2014-07-18 12:29:11 +01:00
stage2_pgtable.h kvm-arm: arm32: Introduce stage2 page table helpers 2016-04-21 14:57:26 +02:00
string.h
suspend.h ARM: 8389/1: Add cpu_resume_arm() for firmwares that resume in ARM state 2015-06-12 21:17:17 +01:00
swab.h
switch_to.h sched, arm: Remove finish_arch_switch() 2015-08-04 09:37:52 +02:00
sync_bitops.h ARM: 7989/1: Delete asm/system.h 2014-02-25 11:33:37 +00:00
syscall.h ARM: 8152/1: Convert pr_warning to pr_warn 2014-09-26 14:39:53 +01:00
system_info.h ARM: 8355/1: arch: Show the serial number from devicetree in cpuinfo 2015-05-08 10:42:35 +01:00
system_misc.h reboot: arm: change reboot_mode to use enum reboot_mode 2013-07-09 10:33:29 -07:00
tcm.h
therm.h
thread_info.h Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-14 12:24:10 -07:00
thread_notify.h
timex.h ARM: drop <mach/timex.h> for !ARCH_MULTIPLATFORM, too 2013-12-20 17:17:16 +01:00
tlb.h arm: mm: enable HAVE_RCU_TABLE_FREE logic 2014-10-09 22:26:01 -04:00
tlbflush.h ARM: 7855/1: Add check for Cortex-A15 errata 798181 ECO 2013-10-29 11:06:13 +00:00
tls.h ARM: 8178/1: fix set_tls for !CONFIG_KUSER_HELPERS 2014-09-30 16:55:23 +01:00
topology.h sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask() 2015-05-27 15:22:15 +02:00
traps.h
trusted_foundations.h ARM: trusted_foundations: fix compile error on non-SMP 2014-05-23 21:28:11 +02:00
types.h ARM: 7822/1: add workaround for ambiguous C99 stdint.h types 2013-08-25 17:09:46 +01:00
uaccess.h ARM: fix uaccess_with_memcpy() with SW_DOMAIN_PAN 2015-12-15 11:51:02 +00:00
ucontext.h
unified.h ARM: replace BSYM() with badr assembly macro 2015-05-08 17:33:50 +01:00
unistd.h Merge branches 'fixes' and 'misc' into for-next 2015-10-29 15:21:30 +00:00
unwind.h
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
vdso_datapage.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
vdso.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
vfp.h ARM: vfp: Add vfp_disable for problematic platforms 2015-05-20 15:07:00 -07:00
vfpmacros.h
vga.h
virt.h arm/arm64: Add new is_kernel_in_hyp_mode predicate 2016-02-29 18:34:16 +00:00
word-at-a-time.h ARM: 8322/1: keep .text and .fixup regions closer together 2015-03-29 23:11:56 +01:00
xor.h ARM: crypto: add NEON accelerated XOR implementation 2013-07-08 22:09:06 +01:00