Re: [PATCH RESEND v2 2/6] target/arm/kvm: Add helper to detect el2 when using KVM

[Andrew Jones <drjones@redhat.com>]

On Thu, Apr 01, 2021 at 05:55:34AM -0700, Haibo Xu wrote:
> Signed-off-by: Haibo Xu <haibo.xu@linaro.org>
> ---
>  target/arm/kvm64.c   |  5 +++++
>  target/arm/kvm_arm.h | 13 +++++++++++++
>  2 files changed, 18 insertions(+)
> 
> diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c
> index dff85f6db9..9cacaf2eb8 100644
> --- a/target/arm/kvm64.c
> +++ b/target/arm/kvm64.c
> @@ -721,6 +721,11 @@ bool kvm_arm_steal_time_supported(void)
>      return kvm_check_extension(kvm_state, KVM_CAP_STEAL_TIME);
>  }
>  
> +bool kvm_arm_el2_supported(void)
> +{
> +    return kvm_check_extension(kvm_state, KVM_CAP_ARM_EL2);
> +}
> +
>  QEMU_BUILD_BUG_ON(KVM_ARM64_SVE_VQ_MIN != 1);
>  
>  void kvm_arm_sve_get_vls(CPUState *cs, unsigned long *map)
> diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h
> index 34f8daa377..7d7fc7981b 100644
> --- a/target/arm/kvm_arm.h
> +++ b/target/arm/kvm_arm.h
> @@ -285,6 +285,14 @@ void kvm_arm_steal_time_finalize(ARMCPU *cpu, Error **errp);
>   */
>  bool kvm_arm_steal_time_supported(void);
>  
> +/**
> + * kvm_arm_el2_supported:
> + *
> + * Returns: true if KVM can enable el2(nested virtualization)
                                         ^ please add a space
> + * and false otherwise.
> + */
> +bool kvm_arm_el2_supported(void);
> +
>  /**
>   * kvm_arm_aarch32_supported:
>   *
> @@ -398,6 +406,11 @@ static inline bool kvm_arm_steal_time_supported(void)
>      return false;
>  }
>  
> +static inline bool kvm_arm_el2_supported(void)
> +{
> +    return false;
> +}
> +
>  /*
>   * These functions should never actually be called without KVM support.
>   */
> -- 
> 2.17.1
> 
> 

Otherwise

Reviewed-by: Andrew Jones <drjones@redhat.com>