On 11/13/2024 2:28 PM, Philippe Mathieu-Daudé wrote:
Hi,
On 5/11/24 06:23, Xiaoyao Li wrote:
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)
We don't use the weak attribute. Maybe declare stubs for each arch?
Or define TARGET_KVM_HAVE_PRE_CREATE_VCPU to avoid touching other ARCHes?
8<------------------------------------------------------------------
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -536,10 +531,12 @@ int kvm_init_vcpu(CPUState *cpu, Error **errp)
trace_kvm_init_vcpu(cpu->cpu_index, kvm_arch_vcpu_id(cpu));
+#ifdef TARGET_KVM_HAVE_PRE_CREATE_VCPU
ret = kvm_arch_pre_create_vcpu(cpu, errp);
if (ret < 0) {
goto err;
}
+#endif
ret = kvm_create_vcpu(cpu);
if (ret < 0) {
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 643ca4950543..bb76bf090fec 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -374,7 +374,9 @@ int kvm_arch_get_default_type(MachineState *ms);
int kvm_arch_init(MachineState *ms, KVMState *s);
+#ifdef TARGET_KVM_HAVE_PRE_CREATE_VCPU
int kvm_arch_pre_create_vcpu(CPUState *cpu, Error **errp);
+#enfid
int kvm_arch_init_vcpu(CPUState *cpu);
int kvm_arch_destroy_vcpu(CPUState *cpu);
I'm OK with either. Please let me what is your preference!
+{
+ 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);
