linux/arch/x86
Jim Mattson a16eb25b09 KVM: x86: Mask LVTPC when handling a PMI
Per the SDM, "When the local APIC handles a performance-monitoring
counters interrupt, it automatically sets the mask flag in the LVT
performance counter register."  Add this behavior to KVM's local APIC
emulation.

Failure to mask the LVTPC entry results in spurious PMIs, e.g. when
running Linux as a guest, PMI handlers that do a "late_ack" spew a large
number of "dazed and confused" spurious NMI warnings.

Fixes: f5132b0138 ("KVM: Expose a version 2 architectural PMU to a guests")
Cc: stable@vger.kernel.org
Signed-off-by: Jim Mattson <jmattson@google.com>
Tested-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/r/20230925173448.3518223-3-mizhang@google.com
[sean: massage changelog, correct Fixes]
Signed-off-by: Sean Christopherson <seanjc@google.com>
2023-09-25 14:40:29 -07:00
..
boot x86/boot/compressed: Reserve more memory for page tables 2023-09-17 09:48:57 +02:00
coco - Some SEV and CC platform helpers cleanup and simplifications now that 2023-06-27 13:26:30 -07:00
configs - The first, cleanup part of the microcode loader reorg tglx has been 2023-08-28 15:55:20 -07:00
crypto crypto: x86/aesni - remove unused parameter to aes_set_key_common() 2023-07-22 13:59:39 +12:00
entry Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
events perf/x86/uncore: Correct the number of CHAs on EMR 2023-09-05 21:50:21 +02:00
hyperv hyperv-next for v6.6 2023-09-04 11:26:29 -07:00
ia32
include KVM/riscv fixes for 6.6, take #1 2023-09-23 05:35:55 -04:00
kernel Misc fixes: 2023-09-17 11:13:37 -07:00
kvm KVM: x86: Mask LVTPC when handling a PMI 2023-09-25 14:40:29 -07:00
lib x86/ibt: Avoid duplicate ENDBR in __put_user_nocheck*() 2023-09-12 17:51:24 +02:00
math-emu x86/fpu: Include asm/fpu/regset.h 2023-05-18 11:56:18 -07:00
mm Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
net bpf: Support new 32bit offset jmp instruction 2023-07-27 18:52:33 -07:00
pci pci-v6.6-changes 2023-08-30 20:23:07 -07:00
platform efi/x86: Move EFI runtime call setup/teardown helpers out of line 2023-09-11 06:37:50 +00:00
power x86/topology: Remove CPU0 hotplug option 2023-05-15 13:44:49 +02:00
purgatory x86/purgatory: Remove LTO flags 2023-09-17 09:49:03 +02:00
ras
realmode x86/realmode: Make stack lock work in trampoline_compat() 2023-05-30 14:11:47 +02:00
tools ELF: fix all "Elf" typos 2023-04-08 13:45:37 -07:00
um um: Hard-code the result of 'uname -s' 2023-08-26 22:40:37 +02:00
video Merge drm/drm-next into drm-misc-next 2023-07-24 15:44:47 +02:00
virt/vmx/tdx
xen Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
.gitignore
Kbuild
Kconfig efi/x86: Ensure that EFI_RUNTIME_MAP is enabled for kexec 2023-09-11 06:37:50 +00:00
Kconfig.assembler x86/shstk: Add Kconfig option for shadow stack 2023-07-11 14:12:18 -07:00
Kconfig.cpu x86/cpu: Remove X86_FEATURE_NAMES 2023-05-15 20:03:08 +02:00
Kconfig.debug docs: move x86 documentation into Documentation/arch/ 2023-03-30 12:58:51 -06:00
Makefile Kbuild updates for v6.6 2023-09-05 11:01:47 -07:00
Makefile_32.cpu
Makefile.postlink x86/build: Avoid relocation information in final vmlinux 2023-06-14 19:54:40 +02:00
Makefile.um um: Only disable SSE on clang to work around old GCC bugs 2023-04-04 09:57:05 +02:00