@@ -108,6 +108,7 @@
#define SVM_VMGEXIT_AP_JUMP_TABLE 0x80000005
#define SVM_VMGEXIT_SET_AP_JUMP_TABLE 0
#define SVM_VMGEXIT_GET_AP_JUMP_TABLE 1
+#define SVM_VMGEXIT_HYPERVISOR_FEATURES 0x8000fffd
#define SVM_VMGEXIT_UNSUPPORTED_EVENT 0x8000ffff
/* Exit code reserved for hypervisor/software use */
@@ -2184,6 +2184,7 @@ static int sev_es_validate_vmgexit(struct vcpu_svm *svm)
case SVM_VMGEXIT_AP_HLT_LOOP:
case SVM_VMGEXIT_AP_JUMP_TABLE:
case SVM_VMGEXIT_UNSUPPORTED_EVENT:
+ case SVM_VMGEXIT_HYPERVISOR_FEATURES:
break;
default:
goto vmgexit_err;
@@ -2365,6 +2366,16 @@ static u64 ghcb_msr_ap_rst_resp(u64 value)
return (u64)GHCB_MSR_AP_RESET_HOLD_RESP | (value << GHCB_DATA_LOW);
}
+static u64 ghcb_msr_hv_feat_resp(u64 value)
+{
+ u64 msr;
+
+ msr = GHCB_MSR_HV_FT_RESP;
+ msr |= (value << GHCB_DATA_LOW);
+
+ return msr;
+}
+
static int sev_handle_vmgexit_msr_protocol(struct vcpu_svm *svm)
{
struct vmcb_control_area *control = &svm->vmcb->control;
@@ -2422,6 +2433,9 @@ static int sev_handle_vmgexit_msr_protocol(struct vcpu_svm *svm)
*/
svm->vmcb->control.ghcb_gpa = ghcb_msr_ap_rst_resp(0);
+ break;
+ case GHCB_MSR_HV_FT_REQ:
+ svm->vmcb->control.ghcb_gpa = ghcb_msr_hv_feat_resp(GHCB_HV_FT_SUPPORTED);
break;
case GHCB_MSR_TERM_REQ: {
u64 reason_set, reason_code;
@@ -2535,6 +2549,11 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
ret = 1;
break;
}
+ case SVM_VMGEXIT_HYPERVISOR_FEATURES:
+ ghcb_set_sw_exit_info_2(ghcb, GHCB_HV_FT_SUPPORTED);
+
+ ret = 1;
+ break;
case SVM_VMGEXIT_UNSUPPORTED_EVENT:
vcpu_unimpl(vcpu,
"vmgexit: unsupported event - exit_info_1=%#llx, exit_info_2=%#llx\n",
@@ -542,6 +542,7 @@ void svm_vcpu_unblocking(struct kvm_vcpu *vcpu);
#define GHCB_VERSION_MAX 1ULL
#define GHCB_VERSION_MIN 1ULL
+#define GHCB_HV_FT_SUPPORTED 0
extern unsigned int max_sev_asid;