[PATCH 2/3] KVM: arm64: Teach address translation about access faults

[D Scott Phillips]

Marc Zyngier <maz at kernel.org> writes:

> It appears that our S1 PTW is completely oblivious of access faults.
> Teach the S1 translation code about it.
>
> Signed-off-by: Marc Zyngier <maz at kernel.org>
> ---
>  arch/arm64/kvm/at.c | 26 +++++++++++++++++++++-----
>  1 file changed, 21 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm64/kvm/at.c b/arch/arm64/kvm/at.c
> index 3a4568e2de910..c40583edebc4f 100644
> --- a/arch/arm64/kvm/at.c
> +++ b/arch/arm64/kvm/at.c
> @@ -456,6 +456,11 @@ static int walk_s1(struct kvm_vcpu *vcpu, struct s1_walk_info *wi,
>  	if (check_output_size(desc & GENMASK(47, va_bottom), wi))
>  		goto addrsz;
>  
> +	if (!(desc & PTE_AF)) {

Shouldn't this depend on TCR_ELx.HA == 0?