i386/cpu: introduce x86_confidential_guest_cpu_instance_init()

To allow execute confidential guest specific cpu init operations.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250508150002.689633-32-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/target/i386/confidential-guest.h b/target/i386/confidential-guest.h
index 164be7633a2015ba2260e0b5856162971595869c..a86c42a47558a6329140b1c6c273207f18e1264b 100644 (file)
--- a/target/i386/confidential-guest.h
+++ b/target/i386/confidential-guest.h
@@ -39,6 +39,7 @@ struct X86ConfidentialGuestClass {
 
     /* <public> */
     int (*kvm_type)(X86ConfidentialGuest *cg);
+    void (*cpu_instance_init)(X86ConfidentialGuest *cg, CPUState *cpu);
     uint32_t (*mask_cpuid_features)(X86ConfidentialGuest *cg, uint32_t feature, uint32_t index,
                                     int reg, uint32_t value);
 };
@@ -59,6 +60,16 @@ static inline int x86_confidential_guest_kvm_type(X86ConfidentialGuest *cg)
     }
 }
 
+static inline void x86_confidential_guest_cpu_instance_init(X86ConfidentialGuest *cg,
+                                                            CPUState *cpu)
+{
+    X86ConfidentialGuestClass *klass = X86_CONFIDENTIAL_GUEST_GET_CLASS(cg);
+
+    if (klass->cpu_instance_init) {
+        klass->cpu_instance_init(cg, cpu);
+    }
+}
+
 /**
  * x86_confidential_guest_mask_cpuid_features:
  *

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 9689f6374e60afec0751fc1a39cbd0a01617fb91..4a7c319bb9a7b30ee7f44cfdd773aeaa2a62bf28 100644 (file)
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -37,6 +37,7 @@
 #include "hw/i386/topology.h"
 #include "exec/watchpoint.h"
 #ifndef CONFIG_USER_ONLY
+#include "confidential-guest.h"
 #include "system/reset.h"
 #include "qapi/qapi-commands-machine-target.h"
 #include "system/address-spaces.h"
@@ -8543,6 +8544,13 @@ static void x86_cpu_post_initfn(Object *obj)
     }
 
     accel_cpu_instance_init(CPU(obj));
+
+#ifndef CONFIG_USER_ONLY
+    if (current_machine && current_machine->cgs) {
+        x86_confidential_guest_cpu_instance_init(
+            X86_CONFIDENTIAL_GUEST(current_machine->cgs), (CPU(obj)));
+    }
+#endif
 }
 
 static void x86_cpu_init_default_topo(X86CPU *cpu)