Linus Torvalds 4f8a3cc118 A set of three patches to fix the fallout of the newly added split lock ... detection feature. It addressed the case where a KVM guest triggers a split lock #AC and KVM reinjects it into the guest which is not prepared to handle it. Adds proper sanity checks which prevent the unconditional injection into the guest and handles the #AC on the host side in the same way as user space detections are handled. Depending on the detection mode it either warns and disables detection for the task or kills the task if the mode is set to fatal. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl6TFtMTHHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYoSHuD/4gUKV4BefhiUulmk++jAyq1Hq91IOg wIZEALyP53AcxXDoASAzkbNfyDuBufszzM6lSgd0lFMN4uaDvW/7jTR9fxyG7xMT uTS86WZRKpMjb+NWnU5OuO7jmYSKnV/yjXqyg+z9G7nO/JdQ7b4GekdPQobGOZ0f NGGttSjCHvMUt5JF6tUggpl8IgomEP0HNes80IHIoJbE1KOm9qiP0NYZtlrlwYWT J0Xuz4b/I1IeT2Dr4X7B4LYmzYqyXpG/8khTapFyBdLqdNLBhoEUPotnEjrL3u/S I4h+U5N1hCu3AjC0iatjedD2etB8GWrOWhBYPmdh9LTdhHIVUIDKWDoUYl3YeESK Kvu5b3tyCbT86YKu2WxDtwi67yN6MM390M2JU3TLzzbbmjxMTG2dzWQaWzKeDFcx NwoxQU08c1/dVheODe2lCsI+RaMY3uWMpHoRrJkm105CaOGrBMpTFfHyMJsY8zgZ vgpUZeXylx0IrgteWyD6UrkA6LqtBukc/zOb9YL8vQmSh2I3URhUQ8O+TQG9VtbR e/KekJ2Ij7gXSOSu65bcpNY3q7BtVi+7ev5KFYhVMT3QuMMdc7l+TkMX5lDhAG+a lYdn9mxuNahyTxylGt7Sy0U1bRyn1n7fIG4azwuCiNhXtimV0urTG6PtfQTf+j4L bXJfa4C4BykF5A== =8FbL -----END PGP SIGNATURE----- Merge tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "A set of three patches to fix the fallout of the newly added split lock detection feature. It addressed the case where a KVM guest triggers a split lock #AC and KVM reinjects it into the guest which is not prepared to handle it. Add proper sanity checks which prevent the unconditional injection into the guest and handles the #AC on the host side in the same way as user space detections are handled. Depending on the detection mode it either warns and disables detection for the task or kills the task if the mode is set to fatal" * tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: KVM: VMX: Extend VMXs #AC interceptor to handle split lock #AC in guest KVM: x86: Emulate split-lock access as a write in emulator x86/split_lock: Provide handle_guest_split_lock()		2020-04-12 10:17:16 -07:00
..
crypto	crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN	2020-01-09 11:30:53 +08:00
e820	x86/efi: EFI soft reservation to E820 enumeration	2019-11-07 15:44:14 +01:00
fpu	x86/fpu: Don't cache access to fpu_fpregs_owner_ctx	2019-11-28 10:16:46 +01:00
numachip
trace	MPX requires recompiling applications, which requires compiler support.	2020-01-30 16:11:50 -08:00
uv	x86/platform/uv: Add a missing prototype for uv_bau_message_interrupt()	2020-03-27 10:54:52 +01:00
vdso	x86/vdso: Enable x86 to use common headers	2020-03-21 15:24:02 +01:00
xen	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-11-26 15:04:47 -08:00
acenv.h
acpi.h	x86/ACPI/sleep: Move acpi_get_wakeup_address() into sleep.c, remove <asm/realmode.h> from <asm/acpi.h>	2019-12-10 10:15:48 +01:00
acrn.h
agp.h
alternative-asm.h
alternative.h	x86: alternative.h: use asm_inline for all alternative variants	2019-09-15 20:14:15 +02:00
amd_nb.h	x86/amd_nb, char/amd64-agp: Use amd_nb_num() accessor	2020-03-17 10:25:58 +01:00
apb_timer.h
apic.h	x86/apic/msi: Plug non-maskable MSI affinity race	2020-02-01 09:31:47 +01:00
apicdef.h
apm.h
arch_hweight.h
archrandom.h	x86: Mark archrandom.h functions __must_check	2020-01-25 12:18:50 -05:00
asm-offsets.h
asm-prototypes.h
asm.h	kill uaccess_try()	2020-03-26 15:02:14 -04:00
atomic.h
atomic64_32.h
atomic64_64.h
barrier.h	x86: Remove X86_FEATURE_MFENCE_RDTSC	2019-07-22 12:00:51 +02:00
bios_ebda.h
bitops.h	x86: Fix bitops.h warning with a moved cast	2020-03-18 12:30:19 +01:00
boot.h
bootparam_utils.h	x86/boot: Preserve boot_params.secure_boot from sanitizing	2019-09-02 09:17:45 +02:00
bug.h	x86: bug.h: use asm_inline in _BUG_FLAGS definitions	2019-09-15 20:14:15 +02:00
bugs.h	x86/mpx: remove MPX from arch/x86	2020-01-23 10:41:20 -08:00
cache.h
cacheflush.h
cacheinfo.h
ce4100.h
checksum.h
checksum_32.h
checksum_64.h
clocksource.h	x86: Introduce asm/vdso/clocksource.h	2020-03-21 15:23:54 +01:00
cmdline.h
cmpxchg.h
cmpxchg_32.h
cmpxchg_64.h
compat.h	compat: provide compat_ptr() on all architectures	2020-01-03 09:32:51 +01:00
cpu.h	x86/split_lock: Provide handle_guest_split_lock()	2020-04-11 16:39:30 +02:00
cpu_device_id.h	x86/cpu: Cleanup the now unused CPU match macros	2020-03-24 21:37:23 +01:00
cpu_entry_area.h	mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions	2019-12-10 10:12:55 +01:00
cpufeature.h	x86/cpufeature: Explain the macro duplication	2019-08-28 08:38:39 +02:00
cpufeatures.h	Support for "split lock" detection:	2020-03-30 19:35:52 -07:00
cpuidle_haltpoll.h	cpuidle-haltpoll: vcpu hotplug support	2019-09-03 09:36:36 +02:00
cpumask.h
crash.h	Merge branch 'x86-kdump-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-11-26 09:48:19 -08:00
current.h
debugreg.h
delay.h
desc.h
desc_defs.h
device.h	x86/PCI: Remove X86_DEV_DMA_OPS	2020-01-24 15:00:35 -06:00
disabled-features.h	MPX requires recompiling applications, which requires compiler support.	2020-01-30 16:11:50 -08:00
div64.h	x86/math64: Provide a sane mul_u64_u32_div() implementation for x86_64	2019-09-03 08:56:14 +02:00
dma-mapping.h
dma.h
dmi.h
doublefault.h	x86/doublefault/32: Move #DF stack and TSS to cpu_entry_area	2019-11-26 21:53:34 +01:00
dwarf2.h	x86: remove always-defined CONFIG_AS_CFI_SECTIONS	2020-04-09 00:01:59 +09:00
edac.h
efi.h	efi/libstub/x86: Use Exit() boot service to exit the stub on errors	2020-02-23 21:59:42 +01:00
elf.h
emergency-restart.h
emulate_prefix.h	x86: xen: kvm: Gather the definition of emulate prefixes	2019-10-17 21:31:57 +02:00
entry_arch.h
espfix.h
exec.h
extable.h
fb.h
fixmap.h	x86/mm: Use the correct function type for native_set_fixmap()	2019-10-11 12:52:32 +02:00
floppy.h
frame.h
fsgsbase.h
ftrace.h	Linux 5.5-rc1	2019-12-10 10:11:00 +01:00
futex.h	x86: get rid of user_atomic_cmpxchg_inatomic()	2020-03-27 23:58:55 -04:00
gart.h
genapic.h
geode.h
hardirq.h
highmem.h
hpet.h
hugetlb.h
hw_breakpoint.h
hw_irq.h	x86/irq: Improve definition of VECTOR_SHUTDOWN et al	2019-08-19 23:19:06 +02:00
hyperv-tlfs.h	PCI: hv: Introduce hv_msi_entry	2020-03-09 14:51:31 +00:00
hypervisor.h	x86/paravirt: Remove const mark from x86_hyper_xen_hvm variable	2019-07-17 08:09:59 +02:00
i8259.h
ia32.h
ia32_unistd.h
imr.h
inat.h
inat_types.h
init.h
insn-eval.h
insn.h	x86: xen: insn: Decode Xen and KVM emulate-prefix signature	2019-10-17 21:31:57 +02:00
inst.h
intel-family.h	x86/cpu: Cleanup the now unused CPU match macros	2020-03-24 21:37:23 +01:00
intel-mid.h
intel_ds.h
intel_mid_vrtc.h
intel_pconfig.h
intel_pmc_ipc.h	platform/x86: intel_pmc_ipc: Drop intel_pmc_gcr_read() and intel_pmc_gcr_write()	2020-01-22 18:52:26 +02:00
intel_pt.h	perf/x86/intel: Support PEBS output to PT	2019-08-28 11:29:39 +02:00
intel_punit_ipc.h
intel_scu_ipc.h	platform/x86: intel_scu_ipc: Drop intel_scu_ipc_raw_command()	2020-01-22 18:52:17 +02:00
intel_telemetry.h	platform/x86: intel_telemetry_pltdrv: use devm_platform_ioremap_resource()	2020-01-10 11:50:32 +02:00
invpcid.h
io.h	x86/asm: add iosubmit_cmds512() based on MOVDIR64B CPU instruction	2020-01-24 11:18:45 +05:30
io_apic.h
io_bitmap.h	x86/ioperm: Add new paravirt function update_io_bitmap()	2020-02-29 12:43:09 +01:00
iomap.h
iommu.h	iommu/vt-d: Check VT-d RMRR region in BIOS is reported as reserved	2019-11-11 16:06:07 +01:00
iommu_table.h
iosf_mbi.h
irq.h	x86/irq: Remove useless return value from do_IRQ()	2020-02-27 14:48:40 +01:00
irq_regs.h
irq_remapping.h
irq_vectors.h
irq_work.h
irqdomain.h
irqflags.h
ist.h
jailhouse_para.h
jump_label.h
kasan.h
kaslr.h
kbdleds.h
Kbuild	asm-generic: make more kernel-space headers mandatory	2020-04-02 09:35:25 -07:00
kdebug.h	x86/dumpstack: Introduce die_addr() for die() with #GP fault address	2019-12-31 13:11:35 +01:00
kexec-bzimage64.h
kexec.h	x86/kdump: Remove the backup region handling	2019-11-14 18:24:43 +01:00
kgdb.h
kmap_types.h
kprobes.h	x86/optprobe: Fix OPTPROBE vs UACCESS	2020-03-20 13:06:22 +01:00
kvm_host.h	KVM: x86: Drop __exit from kvm_x86_ops' hardware_unsetup()	2020-03-31 10:48:09 -04:00
kvm_page_track.h	KVM: Simplify kvm_free_memslot() and all its descendents	2020-03-16 17:57:22 +01:00
kvm_para.h	x86/mm, tracing: Fix CR2 corruption	2019-07-17 23:17:38 +02:00
kvm_vcpu_regs.h
kvmclock.h
linkage.h	x86/asm: Remove the last GLOBAL user and remove the macro	2019-10-18 11:29:50 +02:00
livepatch.h
local.h
local64.h
mach_timer.h
mach_traps.h
math_emu.h
mc146818rtc.h
mce.h	x86 entry code updates:	2020-03-30 19:14:28 -07:00
mcsafe_test.h
mem_encrypt.h	x86, s390/mm: Move sme_active() and sme_me_mask to x86-specific header	2019-08-09 22:52:08 +10:00
memtype.h	x86/mm/pat: Clean up <asm/memtype.h> externs	2019-12-10 10:12:55 +01:00
microcode.h
microcode_amd.h	x86/microcode/AMD: Make stub function static inline	2019-12-12 22:29:00 +01:00
microcode_intel.h
misc.h
mmconfig.h
mmu.h	x86/mpx: remove MPX from arch/x86	2020-01-23 10:41:20 -08:00
mmu_context.h	mm/vma: make vma_is_foreign() available for general use	2020-04-02 09:35:29 -07:00
mmx.h
mmzone.h
mmzone_32.h
mmzone_64.h
module.h	x86/math-emu: Limit MATH_EMULATION to 486SX compatibles	2019-10-03 10:51:17 +02:00
mpspec.h
mpspec_def.h
mshyperv.h	pci-v5.7-changes	2020-04-03 14:25:02 -07:00
msi.h
msidef.h
msr-index.h	Support for "split lock" detection:	2020-03-30 19:35:52 -07:00
msr-trace.h
msr.h	x86: Remove X86_FEATURE_MFENCE_RDTSC	2019-07-22 12:00:51 +02:00
mtrr.h	x86/mm/pat: Rename <asm/pat.h> => <asm/memtype.h>	2019-12-10 10:12:55 +01:00
mwait.h	x86/cpu: Move prototype for get_umwait_control_msr() to a global location	2020-02-17 19:32:45 +01:00
nmi.h	x86/nmi: Remove irq_work from the long duration NMI handler	2020-01-11 15:55:39 +01:00
nops.h
nospec-branch.h	x86/nospec: Remove unused RSB_FILL_LOOPS	2020-01-02 10:54:53 +01:00
numa.h
numa_32.h
olpc.h
olpc_ofw.h
orc_lookup.h
orc_types.h
page.h
page_32.h
page_32_types.h
page_64.h
page_64_types.h
page_types.h	x86/mm: thread pgprot_t through init_memory_mapping()	2020-04-10 15:36:21 -07:00
paravirt.h	x86/ioperm: Add new paravirt function update_io_bitmap()	2020-02-29 12:43:09 +01:00
paravirt_types.h	x86/ioperm: Add new paravirt function update_io_bitmap()	2020-02-29 12:43:09 +01:00
parport.h
pci-direct.h
pci-functions.h
pci.h	x86/PCI: Define to_pci_sysdata() even when !CONFIG_PCI	2020-02-04 08:44:46 -06:00
pci_x86.h
percpu.h
perf_event.h	perf/amd/uncore: Add support for Family 19h L3 PMU	2020-03-17 13:01:03 +01:00
perf_event_p4.h
pgalloc.h	asm-generic, x86: introduce generic pte_{alloc,free}_one[_kernel]	2019-07-12 11:05:45 -07:00
pgtable-2level.h
pgtable-2level_types.h
pgtable-3level.h	x86/mm: Clean up the pmd_read_atomic() comments	2019-09-25 10:13:27 +02:00
pgtable-3level_types.h
pgtable-invert.h
pgtable.h	x86/mm: thread pgprot_t through init_memory_mapping()	2020-04-10 15:36:21 -07:00
pgtable_32.h	mm: consolidate pgtable_cache_init() and pgd_cache_init()	2019-09-24 15:54:09 -07:00
pgtable_32_areas.h	mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions	2019-12-10 10:12:55 +01:00
pgtable_32_types.h	mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions	2019-12-10 10:12:55 +01:00
pgtable_64.h	userfaultfd: wp: add WP pagetable tracking to x86	2020-04-07 10:43:39 -07:00
pgtable_64_types.h
pgtable_areas.h	mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions	2019-12-10 10:12:55 +01:00
pgtable_types.h	userfaultfd: wp: add WP pagetable tracking to x86	2020-04-07 10:43:39 -07:00
pkeys.h	x86/pkeys: Add check for pkey "overflow"	2020-02-24 20:25:21 +01:00
platform_sst_audio.h
pm-trace.h
posix_types.h
preempt.h	x86/entry: Rename ___preempt_schedule	2020-03-21 16:03:53 +01:00
probe_roms.h
processor-cyrix.h
processor-flags.h
processor.h	Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2020-03-31 11:04:05 -07:00
prom.h
proto.h
pti.h	x86: Use the correct SPDX License Identifier in headers	2019-10-01 20:31:35 +02:00
ptrace.h	Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2020-01-28 12:28:06 -08:00
purgatory.h	x86/kdump: Remove the backup region handling	2019-11-14 18:24:43 +01:00
pvclock-abi.h
pvclock.h
qrwlock.h
qspinlock.h	locking/qspinlock,x86: Clarify virt_spin_lock_key	2019-08-06 12:49:16 +02:00
qspinlock_paravirt.h
realmode.h	x86/boot: Fix a comment's incorrect file reference	2019-12-16 14:09:33 +01:00
reboot.h
reboot_fixups.h
required-features.h
resctrl_sched.h
rmwcc.h
seccomp.h
sections.h	x86/setup: Fix static memory detection	2020-03-19 11:58:13 +01:00
segment.h	x86/stackframe/32: Repair 32-bit Xen PV	2019-11-19 21:58:28 +01:00
serial.h
set_memory.h	x86/mm: introduce __set_memory_prot()	2020-04-10 15:36:21 -07:00
setup.h
setup_arch.h
shmparam.h
sigcontext.h
sigframe.h	x86: switch sigframe sigset handling to explict __get_user()/__put_user()	2020-03-18 15:29:54 -04:00
sighandling.h	Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2020-03-31 11:04:05 -07:00
signal.h
simd.h
smap.h
smp.h	x86/smp: Move smp_function_call implementations into IPI code	2019-07-25 16:12:01 +02:00
sparsemem.h
spec-ctrl.h
special_insns.h	x86/paravirt: Drop {read,write}_cr8() hooks	2019-07-22 10:12:33 +02:00
spinlock.h
spinlock_types.h
sta2x11.h
stackprotector.h
stacktrace.h
string.h
string_32.h
string_64.h
suspend.h
suspend_32.h
suspend_64.h	x86/paravirt: Drop {read,write}_cr8() hooks	2019-07-22 10:12:33 +02:00
svm.h	kvm: svm: Intercept RDPRU	2019-09-24 16:15:36 +02:00
swiotlb.h
switch_to.h	x86/process: Unify copy_thread_tls()	2019-11-16 11:23:59 +01:00
sync_bitops.h
sync_core.h
syscall.h	Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2020-03-31 11:04:05 -07:00
syscall_wrapper.h	x86/entry: Fix build error x86 with !CONFIG_POSIX_TIMERS	2020-03-25 10:06:20 +01:00
syscalls.h	x86: Remove unneeded includes	2020-03-21 16:03:25 +01:00
sysfb.h
text-patching.h	x86/kprobes: Fix ordering while text-patching	2019-11-27 07:44:24 +01:00
thread_info.h	Support for "split lock" detection:	2020-03-30 19:35:52 -07:00
time.h
timer.h
timex.h
tlb.h	asm-generic/tlb: rename HAVE_RCU_TABLE_FREE	2020-02-04 03:05:26 +00:00
tlbbatch.h
tlbflush.h	x86/mm: Avoid redundant interrupt disable in load_mm_cr4()	2019-07-24 14:43:37 +02:00
topology.h	x86/intel_pstate: Handle runtime turbo disablement/enablement in frequency invariance	2020-01-28 21:37:06 +01:00
trace_clock.h
traps.h	x86/traps: Remove redundant declaration of do_double_fault()	2020-02-27 14:48:40 +01:00
tsc.h
uaccess.h	x86: start using named parameters for low-level uaccess asms	2020-04-01 13:23:14 -07:00
uaccess_32.h	x86: get rid of small constant size cases in raw_copy_{to,from}_user()	2020-03-18 15:53:25 -04:00
uaccess_64.h	x86: get rid of small constant size cases in raw_copy_{to,from}_user()	2020-03-18 15:53:25 -04:00
umip.h	x86/Kconfig: Rename UMIP config parameter	2019-11-07 11:07:29 +01:00
unaligned.h
unistd.h	x86/entry: Move max syscall number calculation to syscallhdr.sh	2020-03-21 16:03:21 +01:00
unwind.h
unwind_hints.h	ftrace/x86: Tell objtool to ignore nondeterministic ftrace stack layout	2019-11-13 09:36:50 -05:00
uprobes.h
user.h
user32.h
user_32.h
user_64.h
vdso.h	x86/vdso: Add time napespace page	2020-01-14 12:20:58 +01:00
vga.h
vgtod.h	um: Fix header inclusion	2020-03-23 18:45:14 +01:00
virtext.h
vm86.h
vmalloc.h	mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions	2019-12-10 10:12:55 +01:00
vmware.h	x86/cpu/vmware: Fix platform detection VMWARE_PORT macro	2019-10-22 00:51:44 +02:00
vmx.h	KVM: nVMX: Allow L1 to use 5-level page walks for nested EPT	2020-03-16 17:57:44 +01:00
vmxfeatures.h	KVM: VMX: Add VMX_FEATURE_USR_WAIT_PAUSE	2020-02-21 18:05:19 +01:00
vsyscall.h
vvar.h	x86/vdso: Add time napespace page	2020-01-14 12:20:58 +01:00
word-at-a-time.h
x86_init.h	x86/timer: Don't skip PIT setup when APIC is disabled or in legacy mode	2020-01-29 12:50:12 +01:00
xor.h
xor_32.h
xor_64.h
xor_avx.h	x86: remove always-defined CONFIG_AS_AVX	2020-04-09 00:01:59 +09:00