[PATCH v3 24/49] target/i386: Add handling for KVM_X86_SNP_VM VM type

[Michael Roth <michael.roth@xxxxxxx>]

An SNP VM requires VM type KVM_X86_SNP_VM to be passed to
kvm_ioctl(KVM_CREATE_VM). Add it to the list of supported VM types, and
return it appropriately via X86ConfidentialGuestClass->kvm_type().

Signed-off-by: Michael Roth <michael.roth@xxxxxxx>
---
 target/i386/kvm/kvm.c |  1 +
 target/i386/sev.c     | 10 ++++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index e109648f26..59e9048e61 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -164,6 +164,7 @@ static int kvm_get_one_msr(X86CPU *cpu, int index, uint64_t *value);
 
 static const char *vm_type_name[] = {
     [KVM_X86_DEFAULT_VM] = "default",
+    [KVM_X86_SNP_VM] = "snp"
 };
 
 bool kvm_is_vm_type_supported(int type)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 2eb13ba639..61af312a11 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -853,14 +853,20 @@ sev_vm_state_change(void *opaque, bool running, RunState state)
 static int sev_kvm_type(X86ConfidentialGuest *cg)
 {
     SevCommonState *sev_common = SEV_COMMON(cg);
-    SevGuestState *sev_guest = SEV_GUEST(sev_common);
     int kvm_type;
 
     if (sev_common->kvm_type != -1) {
         goto out;
     }
 
-    kvm_type = (sev_guest->policy & SEV_POLICY_ES) ? KVM_X86_SEV_ES_VM : KVM_X86_SEV_VM;
+    if (sev_snp_enabled()) {
+        kvm_type = KVM_X86_SNP_VM;
+    } else if (sev_es_enabled()) {
+        kvm_type = KVM_X86_SEV_ES_VM;
+    } else {
+        kvm_type = KVM_X86_SEV_VM;
+    }
+
     if (kvm_is_vm_type_supported(kvm_type)) {
         sev_common->kvm_type = kvm_type;
     } else {
-- 
2.25.1