On Fri, Aug 18, 2023 at 05:49:56AM -0400, 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>
> ---
> accel/kvm/kvm-all.c | 12 ++++++++++++
> include/sysemu/kvm.h | 1 +
> 2 files changed, 13 insertions(+)
>
> diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
> index c9f3aab5e587..5071af917ae0 100644
> --- a/accel/kvm/kvm-all.c
> +++ b/accel/kvm/kvm-all.c
> @@ -422,6 +422,11 @@ 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)
> +{
> + return 0;
> +}
> +
> int kvm_init_vcpu(CPUState *cpu, Error **errp)
> {
> KVMState *s = kvm_state;
> @@ -430,6 +435,13 @@ 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, "%s: kvm_arch_pre_create_vcpu() failed",
> + __func__);
Don't report generic error messages here, when kvm_arch_pre_create_vcpu
can provide a better error - pass the 'errp' into the kvm_arch_pre_create_vcpu
method.
> + 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 49c896d8a512..d89ec87072d7 100644
> --- a/include/sysemu/kvm.h
> +++ b/include/sysemu/kvm.h
> @@ -371,6 +371,7 @@ 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);
>
> --
> 2.34.1
>
With regards,
Daniel
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