[PATCH v6 07/60] kvm: Introduce kvm_arch_pre_create_vcpu()

[Xiaoyao Li <xiaoyao.li@xxxxxxxxx>]

Introduce kvm_arch_pre_create_vcpu(), to perform arch-dependent
work prior to create any vcpu. This is for i386 TDX because it needs
call TDX_INIT_VM before creating any vcpu.

Signed-off-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
Acked-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
Changes in v3:
- pass @errp to kvm_arch_pre_create_vcpu(); (Per Daniel)
---
 accel/kvm/kvm-all.c  | 10 ++++++++++
 include/sysemu/kvm.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 930a5bfed58f..1732fa1adecd 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -523,6 +523,11 @@ void kvm_destroy_vcpu(CPUState *cpu)
     }
 }
 
+int __attribute__ ((weak)) kvm_arch_pre_create_vcpu(CPUState *cpu, Error **errp)
+{
+    return 0;
+}
+
 int kvm_init_vcpu(CPUState *cpu, Error **errp)
 {
     KVMState *s = kvm_state;
@@ -531,6 +536,11 @@ int kvm_init_vcpu(CPUState *cpu, Error **errp)
 
     trace_kvm_init_vcpu(cpu->cpu_index, kvm_arch_vcpu_id(cpu));
 
+    ret = kvm_arch_pre_create_vcpu(cpu, errp);
+    if (ret < 0) {
+        goto err;
+    }
+
     ret = kvm_create_vcpu(cpu);
     if (ret < 0) {
         error_setg_errno(errp, -ret,
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index c3a60b28909a..643ca4950543 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -374,6 +374,7 @@ int kvm_arch_get_default_type(MachineState *ms);
 
 int kvm_arch_init(MachineState *ms, KVMState *s);
 
+int kvm_arch_pre_create_vcpu(CPUState *cpu, Error **errp);
 int kvm_arch_init_vcpu(CPUState *cpu);
 int kvm_arch_destroy_vcpu(CPUState *cpu);
 
-- 
2.34.1