[RFC PATCH v3 09/36] KVM: Introduce kvm_arch_pre_create_vcpu()

[Xiaoyao Li]

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@intel.com>
---
 accel/kvm/kvm-all.c    | 7 +++++++
 include/sysemu/kvm.h   | 1 +
 target/arm/kvm64.c     | 5 +++++
 target/i386/kvm/kvm.c  | 5 +++++
 target/mips/kvm.c      | 5 +++++
 target/ppc/kvm.c       | 5 +++++
 target/s390x/kvm/kvm.c | 5 +++++
 7 files changed, 33 insertions(+)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 27864dfaeaaa..a4bb449737a6 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -465,6 +465,13 @@ 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);
+    if (ret < 0) {
+        error_setg_errno(errp, -ret,
+                         "kvm_init_vcpu: kvm_arch_pre_create_vcpu() failed");
+        goto err;
+    }
+
     ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu));
     if (ret < 0) {
         error_setg_errno(errp, -ret, "kvm_init_vcpu: kvm_get_vcpu failed 
(%lu)",
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index a783c7886811..0e94031ab7c7 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -373,6 +373,7 @@ int kvm_arch_put_registers(CPUState *cpu, int level);
 
 int kvm_arch_init(MachineState *ms, KVMState *s);
 
+int kvm_arch_pre_create_vcpu(CPUState *cpu);
 int kvm_arch_init_vcpu(CPUState *cpu);
 int kvm_arch_destroy_vcpu(CPUState *cpu);
 
diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c
index ccadfbbe72be..ae7336851c62 100644
--- a/target/arm/kvm64.c
+++ b/target/arm/kvm64.c
@@ -935,6 +935,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return kvm_arm_init_cpreg_list(cpu);
 }
 
+int kvm_arch_pre_create_vcpu(CPUState *cpu)
+{
+    return 0;
+}
+
 int kvm_arch_destroy_vcpu(CPUState *cs)
 {
     return 0;
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index ddbe8f64fadb..7bd5589e1e6c 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -2102,6 +2102,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return r;
 }
 
+int kvm_arch_pre_create_vcpu(CPUState *cpu)
+{
+    return 0;
+}
+
 int kvm_arch_destroy_vcpu(CPUState *cs)
 {
     X86CPU *cpu = X86_CPU(cs);
diff --git a/target/mips/kvm.c b/target/mips/kvm.c
index 086debd9f013..0647fe7c654a 100644
--- a/target/mips/kvm.c
+++ b/target/mips/kvm.c
@@ -92,6 +92,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return ret;
 }
 
+int kvm_arch_pre_create_vcpu(CPUState *cpu)
+{
+    return 0;
+}
+
 int kvm_arch_destroy_vcpu(CPUState *cs)
 {
     return 0;
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index dc93b99189ea..c14a20b80f12 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -507,6 +507,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return ret;
 }
 
+int kvm_arch_pre_create_vcpu(CPUState *cpu)
+{
+    return 0;
+}
+
 int kvm_arch_destroy_vcpu(CPUState *cs)
 {
     return 0;
diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c
index 6acf14d5ecb4..8170c5fad0b8 100644
--- a/target/s390x/kvm/kvm.c
+++ b/target/s390x/kvm/kvm.c
@@ -405,6 +405,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return 0;
 }
 
+int kvm_arch_pre_create_vcpu(CPUState *cpu)
+{
+    return 0;
+}
+
 int kvm_arch_destroy_vcpu(CPUState *cs)
 {
     S390CPU *cpu = S390_CPU(cs);
-- 
2.27.0