diff options
Diffstat (limited to 'arch/riscv/kvm')
| -rw-r--r-- | arch/riscv/kvm/vcpu_pmu.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/riscv/kvm/vcpu_pmu.c b/arch/riscv/kvm/vcpu_pmu.c index dc3c118efb57..921340413846 100644 --- a/arch/riscv/kvm/vcpu_pmu.c +++ b/arch/riscv/kvm/vcpu_pmu.c @@ -80,6 +80,14 @@ void kvm_riscv_vcpu_pmu_init(struct kvm_vcpu *vcpu) struct kvm_pmu *kvpmu = vcpu_to_pmu(vcpu); struct kvm_pmc *pmc; + /* + * PMU functionality should be only available to guests if privilege mode + * filtering is available in the host. Otherwise, guest will always count + * events while the execution is in hypervisor mode. + */ + if (!riscv_isa_extension_available(NULL, SSCOFPMF)) + return; + ret = riscv_pmu_get_hpm_info(&hpm_width, &num_hw_ctrs); if (ret < 0 || !hpm_width || !num_hw_ctrs) return; |