[RFC PATCH v4 04/36] target/i386: Introduce kvm_confidential_guest_init()

[Xiaoyao Li <xiaoyao.li@intel.com>]

Introduce a separate function kvm_confidential_guest_init() for SEV (and
future TDX).

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
 target/i386/kvm/kvm.c | 11 ++++++++++-
 target/i386/sev.c     |  1 -
 target/i386/sev.h     |  2 ++
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 3f8a9183fa9b..f657518616f1 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -2426,6 +2426,15 @@ static void register_smram_listener(Notifier *n, void *unused)
                                  &smram_address_space, 1, "kvm-smram");
 }
 
+static int kvm_confidential_guest_init(MachineState *ms, Error **errp)
+{
+    if (object_dynamic_cast(OBJECT(ms->cgs), TYPE_SEV_GUEST)) {
+        return sev_kvm_init(ms->cgs, errp);
+    }
+
+    return 0;
+}
+
 int kvm_arch_init(MachineState *ms, KVMState *s)
 {
     uint64_t identity_base = 0xfffbc000;
@@ -2446,7 +2455,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
      * mechanisms are supported in future (e.g. TDX), they'll need
      * their own initialization either here or elsewhere.
      */
-    ret = sev_kvm_init(ms->cgs, &local_err);
+    ret = kvm_confidential_guest_init(ms, &local_err);
     if (ret < 0) {
         error_report_err(local_err);
         return ret;
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 32f7dbac4efa..6089b91cc698 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -39,7 +39,6 @@
 #include "hw/i386/pc.h"
 #include "exec/address-spaces.h"
 
-#define TYPE_SEV_GUEST "sev-guest"
 OBJECT_DECLARE_SIMPLE_TYPE(SevGuestState, SEV_GUEST)
 
 
diff --git a/target/i386/sev.h b/target/i386/sev.h
index 83e82aa42c41..a9c980dd4b2d 100644
--- a/target/i386/sev.h
+++ b/target/i386/sev.h
@@ -20,6 +20,8 @@
 
 #include "exec/confidential-guest-support.h"
 
+#define TYPE_SEV_GUEST "sev-guest"
+
 #define SEV_POLICY_NODBG        0x1
 #define SEV_POLICY_NOKS         0x2
 #define SEV_POLICY_ES           0x4
-- 
2.27.0