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:
|
||
|---|---|---|
| .. | ||
| capabilities.h | ||
| evmcs.c | ||
| evmcs.h | ||
| nested.c | ||
| nested.h | ||
| pmu_intel.c | ||
| posted_intr.c | ||
| posted_intr.h | ||
| run_flags.h | ||
| sgx.c | ||
| sgx.h | ||
| vmcs.h | ||
| vmcs12.c | ||
| vmcs12.h | ||
| vmcs_shadow_fields.h | ||
| vmenter.S | ||
| vmx.c | ||
| vmx.h | ||
| vmx_ops.h | ||