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Marc Zyngier e83a28c521 arm/arm64: KVM: Enforce unconditional flush to PoC when mapping to stage-2 
commit 8f36ebaf21 upstream.

When we fault in a page, we flush it to the PoC (Point of Coherency)
if the faulting vcpu has its own caches off, so that it can observe
the page we just brought it.

But if the vcpu has its caches on, we skip that step. Bad things
happen when *another* vcpu tries to access that page with its own
caches disabled. At that point, there is no garantee that the
data has made it to the PoC, and we access stale data.

The obvious fix is to always flush to PoC when a page is faulted
in, no matter what the state of the vcpu is.

Fixes: 2d58b733c8 ("arm64: KVM: force cache clean on page fault when caches are off")
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-12 06:37:28 +01:00
..
hardware ARM: uniphier: add outer cache support 2015-10-27 09:20:50 +09:00
mach PCI changes for the v4.4 merge window: 2015-11-06 11:29:53 -08:00
xen xen/arm: correctly handle DMA mapping of compound pages 2016-03-03 15:07:30 -08:00
arch_gicv3.h irqchip/gic-v3: Add missing include for barrier.h 2015-12-10 19:13:26 +01:00
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 Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
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: 8431/1: fix alignement of __bug_table section entries 2015-09-11 19:18:19 +01:00
bugs.h
cache.h
cacheflush.h firmware: qcom_scm-32: replace open-coded call to __cpuc_flush_dcache_area() 2015-08-11 18:45:00 +01:00
cachetype.h
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: 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: cpuidle: Add a cpuidle ops structure to be used for DT 2015-03-24 10:16:01 +01:00
cputype.h ARM: 8634/1: hw_breakpoint: blacklist Scorpion CPUs 2017-01-26 08:23:49 +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: 8027/1: fix do_div() bug in big-endian systems 2014-04-22 22:23:57 +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: 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 ARM: 8617/1: dma: fix dma_max_pfn() 2016-10-07 15:23:40 +02:00
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
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
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: 8415/1: early fixmap support for earlycon 2015-08-18 14:00:29 +01:00
flat.h
floppy.h ARM: 8584/1: floppy: avoid gcc-6 warning 2016-11-10 16:36:36 +01:00
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 Merge branch 'devel-stable' into for-next 2013-11-12 10:58:59 +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
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.h xen/events: Always allocate legacy interrupts on PV guests 2015-11-26 18:05:01 +00:00
irq_work.h arm: Tell irq work about self IPI support 2014-09-13 18:38:39 +02:00
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: Add msi.h to Kbuild 2015-10-23 13:06:27 -05:00
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 arm/arm64: KVM: Improve kvm_exit tracepoint 2015-10-22 23:01:47 +02:00
kvm_asm.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-06-23 14:08:54 -07:00
kvm_coproc.h
kvm_emulate.h arm64: KVM: Correctly handle zero register during MMIO 2015-12-04 16:29:37 +00:00
kvm_host.h KVM: arm/arm64: implement kvm_arm_[halt,resume]_guest 2015-10-22 23:01:46 +02:00
kvm_mmio.h KVM: arm/arm64: rework MMIO abort handling to use KVM MMIO bus 2015-03-30 17:07:19 +01:00
kvm_mmu.h arm/arm64: KVM: Enforce unconditional flush to PoC when mapping to stage-2 2017-03-12 06:37:28 +01:00
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: 8430/1: use default ioremap alignment for SMP or LPAE 2015-09-22 08:13:57 +01:00
mmu.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
mmu_context.h ARM: 7790/1: Fix deferred mm switch on VIVT processors 2013-07-26 12:02:09 +01:00
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
page.h ARM: make vectors page inaccessible from userspace 2013-08-01 14:31:58 +01:00
patch.h ARM: probes: move all probe code to dedicate directory 2015-01-09 09:36:50 +00:00
pci.h PCI: Remove unused pci_dma_burst_advice() 2015-06-08 07:56:43 -05:00
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: 8578/1: mm: ensure pmd_present only checks the valid bit 2016-07-27 09:47:30 -07:00
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 ARM: 8579/1: mm: Fix definition of pmd_mknotpresent 2016-07-27 09:47:30 -07:00
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: 8578/1: mm: ensure pmd_present only checks the valid bit 2016-07-27 09:47:30 -07:00
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: 8457/1: psci-smp is built only for SMP 2016-03-03 15:07:08 -08:00
ptrace.h ARM: 8175/1: Use current_stack_pointer to calculate pt_regs address 2014-11-13 23:58:07 +00:00
setup.h ARM: 8025/1: Get rid of meminfo 2014-06-01 01:17:12 +01:00
shmparam.h
signal.h
smp.h ARM: 8423/1: add const qualifier to smp_operations member in structures 2015-09-22 08:13:57 +01:00
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
sparsemem.h
spinlock.h arm/spinlock: Replace ACCESS_ONCE with READ_ONCE 2014-12-18 09:54:40 +01:00
spinlock_types.h ARM: locks: prefetch the destination word for write prior to strex 2013-09-30 16:42:55 +01:00
stackprotector.h
stacktrace.h ARM: 8070/1: Introduce arm_get_current_stack_frame() 2014-07-18 12:29:11 +01:00
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.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
vdso_datapage.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: 7787/1: virt: ensure visibility of __boot_cpu_mode 2013-07-26 12:01:17 +01:00
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