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| author | Nadav Amit <namit@cs.technion.ac.il> | 2014-06-02 19:34:09 +0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-06-18 19:46:18 +0400 |
| commit | 67f4d4288c353734d29c45f6725971c71af96791 (patch) | |
| tree | 6cec4548ccd3e2357512aa028c4ab8f1f61b9ffc /arch/x86/kvm/x86.c | |
| parent | 3b32004a66e96e17d2a031c08d3304245c506dfc (diff) | |
| download | linux-67f4d4288c353734d29c45f6725971c71af96791.tar.xz | |
KVM: x86: rdpmc emulation checks the counter incorrectly
The rdpmc emulation checks that the counter (ECX) is not higher than 2, without
taking into considerations bits 30:31 role (e.g., bit 30 marks whether the
counter is fixed). The fix uses the pmu information for checking the validity
of the pmu counter.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index f32a02578c0d..451d6acea808 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4762,6 +4762,12 @@ static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, return kvm_set_msr(emul_to_vcpu(ctxt), &msr); } +static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt, + u32 pmc) +{ + return kvm_pmu_check_pmc(emul_to_vcpu(ctxt), pmc); +} + static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt, u32 pmc, u64 *pdata) { @@ -4838,6 +4844,7 @@ static const struct x86_emulate_ops emulate_ops = { .set_dr = emulator_set_dr, .set_msr = emulator_set_msr, .get_msr = emulator_get_msr, + .check_pmc = emulator_check_pmc, .read_pmc = emulator_read_pmc, .halt = emulator_halt, .wbinvd = emulator_wbinvd, |