HV_X64_MSR_GUEST_OS_ID/HV_X64_MSR_HYPERCALL are only available to guest
when HV_MSR_HYPERCALL_AVAILABLE bit is exposed.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <
20210521095204.
2161214-6-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
{
+ if (!hv_vcpu->enforce_cpuid)
+ return true;
+
+ switch (msr) {
+ case HV_X64_MSR_GUEST_OS_ID:
+ case HV_X64_MSR_HYPERCALL:
+ return hv_vcpu->cpuid_cache.features_eax &
+ HV_MSR_HYPERCALL_AVAILABLE;
+ default:
+ break;
+ }
+
return true;
}