3863ca0522
commit 05519c86d6997cfb9bb6c82ce1595d1015b718dc upstream.
Use a u64 instead of a u8 when taking a snapshot of pmu->fixed_ctr_ctrl
when reprogramming fixed counters, as truncating the value results in KVM
thinking fixed counter 2 is already disabled (the bug also affects fixed
counters 3+, but KVM doesn't yet support those). As a result, if the
guest disables fixed counter 2, KVM will get a false negative and fail to
reprogram/disable emulation of the counter, which can leads to incorrect
counts and spurious PMIs in the guest.
Fixes:
|
||
|---|---|---|
| .. | ||
| mmu | ||
| svm | ||
| vmx | ||
| .gitignore | ||
| Kconfig | ||
| Makefile | ||
| cpuid.c | ||
| cpuid.h | ||
| debugfs.c | ||
| emulate.c | ||
| fpu.h | ||
| hyperv.c | ||
| hyperv.h | ||
| i8254.c | ||
| i8254.h | ||
| i8259.c | ||
| ioapic.c | ||
| ioapic.h | ||
| irq.c | ||
| irq.h | ||
| irq_comm.c | ||
| kvm-asm-offsets.c | ||
| kvm_cache_regs.h | ||
| kvm_emulate.h | ||
| kvm_onhyperv.c | ||
| kvm_onhyperv.h | ||
| lapic.c | ||
| lapic.h | ||
| mmu.h | ||
| mtrr.c | ||
| pmu.c | ||
| pmu.h | ||
| reverse_cpuid.h | ||
| trace.h | ||
| tss.h | ||
| x86.c | ||
| x86.h | ||
| xen.c | ||
| xen.h | ||