diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index a04fe4eb237d3321b0ef7af916e3350864e009cd..ffa2671a7f2f8f3403955144b3bd6447dea90d96 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -194,6 +194,7 @@ struct x86_emulate_ops { int (*set_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong value); int (*set_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 data); int (*get_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 *pdata); + int (*check_pmc)(struct x86_emulate_ctxt *ctxt, u32 pmc); int (*read_pmc)(struct x86_emulate_ctxt *ctxt, u32 pmc, u64 *pdata); void (*halt)(struct x86_emulate_ctxt *ctxt); void (*wbinvd)(struct x86_emulate_ctxt *ctxt); diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 49314155b66c801103ffb89b40585ac649393fdb..63e020be3da78e1c426aaf06ee48e478e0247d66 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1070,6 +1070,7 @@ void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu); bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr); int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data); int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info); +int kvm_pmu_check_pmc(struct kvm_vcpu *vcpu, unsigned pmc); int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data); void kvm_handle_pmu_event(struct kvm_vcpu *vcpu); void kvm_deliver_pmi(struct kvm_vcpu *vcpu); diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index be3f7645e39d7b86f77e63130d771eebe231d1fa..3da8d82acb319e5fea897e84991c5e447d66ce19 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3507,7 +3507,7 @@ static int check_rdpmc(struct x86_emulate_ctxt *ctxt) u64 rcx = reg_read(ctxt, VCPU_REGS_RCX); if ((!(cr4 & X86_CR4_PCE) && ctxt->ops->cpl(ctxt)) || - (rcx > 3)) + ctxt->ops->check_pmc(ctxt, rcx)) return emulate_gp(ctxt, 0); return X86EMUL_CONTINUE; diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index cbecaa90399c1fbb1555ea5309a43f392f36fda2..3dd6accb64ec130d28db81f501f95aa7726c4002 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -428,6 +428,15 @@ int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) return 1; } +int kvm_pmu_check_pmc(struct kvm_vcpu *vcpu, unsigned pmc) +{ + struct kvm_pmu *pmu = &vcpu->arch.pmu; + bool fixed = pmc & (1u << 30); + pmc &= ~(3u << 30); + return (!fixed && pmc >= pmu->nr_arch_gp_counters) || + (fixed && pmc >= pmu->nr_arch_fixed_counters); +} + int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data) { struct kvm_pmu *pmu = &vcpu->arch.pmu; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index f32a02578c0d1985b424edaf992aede89b5cd7b4..451d6acea808edbb1b67a872b55c1aea14938a04 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,