Like Xu 8631ef59b6 KVM: x86/pmu: Do not speculatively query Intel GP PMCs that don't exist yet ... The SDM lists an architectural MSR IA32_CORE_CAPABILITIES (0xCF) that limits the theoretical maximum value of the Intel GP PMC MSRs allocated at 0xC1 to 14; likewise the Intel April 2022 SDM adds IA32_OVERCLOCKING_STATUS at 0x195 which limits the number of event selection MSRs to 15 (0x186-0x194). Limiting the maximum number of counters to 14 or 18 based on the currently allocated MSRs is clearly fragile, and it seems likely that Intel will even place PMCs 8-15 at a completely different range of MSR indices. So stop at the maximum number of GP PMCs supported today on Intel processors. There are some machines, like Intel P4 with non Architectural PMU, that may indeed have 18 counters, but those counters are in a completely different MSR address range and are not supported by KVM. Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: stable@vger.kernel.org Fixes: cf05a67b68 ("KVM: x86: omit "impossible" pmu MSRs from MSR list") Suggested-by: Jim Mattson <jmattson@google.com> Signed-off-by: Like Xu <likexu@tencent.com> Reviewed-by: Jim Mattson <jmattson@google.com> Message-Id: <20220919091008.60695-1-likexu@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2022-11-09 12:26:53 -05:00
..
mmu
svm	KVM: SVM: Only dump VMSA to klog at KERN_DEBUG level	2022-11-09 12:26:53 -05:00
vmx	KVM: x86: use a separate asm-offsets.c file	2022-11-09 12:10:17 -05:00
.gitignore	KVM: x86: use a separate asm-offsets.c file	2022-11-09 12:10:17 -05:00
cpuid.c	KVM: x86: Fix a typo about the usage of kvcalloc()	2022-11-03 09:39:29 -04:00
cpuid.h
debugfs.c	KVM: x86: Reduce refcount if single_open() fails in kvm_mmu_rmaps_stat_open()	2022-10-27 04:41:54 -04:00
emulate.c	KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format	2022-10-28 06:10:30 -04:00
fpu.h
hyperv.c
hyperv.h
i8254.c
i8254.h
i8259.c
ioapic.c
ioapic.h
irq.c
irq.h
irq_comm.c
Kconfig
kvm-asm-offsets.c	KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly	2022-11-09 12:25:53 -05:00
kvm_cache_regs.h
kvm_emulate.h
kvm_onhyperv.c
kvm_onhyperv.h
lapic.c
lapic.h
Makefile	KVM: SVM: replace regs argument of __svm_vcpu_run() with vcpu_svm	2022-11-09 12:16:34 -05:00
mmu.h
mtrr.c
pmu.c
pmu.h
reverse_cpuid.h
trace.h
tss.h
x86.c	KVM: x86/pmu: Do not speculatively query Intel GP PMCs that don't exist yet	2022-11-09 12:26:53 -05:00
x86.h
xen.c	KVM: x86/xen: Fix eventfd error handling in kvm_xen_eventfd_assign()	2022-10-28 06:47:26 -04:00
xen.h