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kvm: Introduce kvm_arch_pre_create_vcpu()

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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>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
---
Changes in v3:
- pass @errp to kvm_arch_pre_create_vcpu(); (Per Daniel)
This commit is contained in:
Xiaoyao Li
2021-12-08 15:20:06 +08:00
committed by Dario Faggioli
parent b81bfd3686
commit 401a6d349c
2 changed files with 11 additions and 0 deletions
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10
accel/kvm/kvm-all.c
View File

@@ -418,6 +418,11 @@ static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id)
return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id);
}
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;
@@ -426,6 +431,11 @@ 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_get_vcpu(s, kvm_arch_vcpu_id(cpu));
if (ret < 0) {
error_setg_errno(errp, -ret, "kvm_init_vcpu: kvm_get_vcpu failed (%lu)",

1
include/sysemu/kvm.h
View File

@@ -341,6 +341,7 @@ 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);