[PATCH 1/5] KVM: arm64: Simplify kvm_vcpu_get_mpidr_aff()

[Joey Gouly]

On Thu, Sep 07, 2023 at 11:09:27AM +0100, Marc Zyngier wrote:
> By definition, MPIDR_EL1 cannot be modified by the guest. This
> means it is pointless to check whether this is loaded on the CPU.
> 
> Simplify the kvm_vcpu_get_mpidr_aff() helper to directly access
> the in-memory value.
> 
> Signed-off-by: Marc Zyngier <maz at kernel.org>
> ---
>  arch/arm64/include/asm/kvm_emulate.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
> index 3d6725ff0bf6..b66ef77cf49e 100644
> --- a/arch/arm64/include/asm/kvm_emulate.h
> +++ b/arch/arm64/include/asm/kvm_emulate.h
> @@ -465,7 +465,7 @@ static inline bool kvm_is_write_fault(struct kvm_vcpu *vcpu)
>  
>  static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
>  {
> -	return vcpu_read_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK;
> +	return __vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK;
>  }
>  
>  static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)

Reviewed-by: Joey Gouly <joey.gouly at arm.com>