[PATCH v4 26/28] KVM: arm64: nv: Expose FGT to nested guests

[Jing Zhang]

Hi Marc,

On Tue, Aug 15, 2023 at 11:47 AM Marc Zyngier <maz at kernel.org> wrote:
>
> Now that we have FGT support, expose the feature to NV guests.
>
> Reviewed-by: Eric Auger <eric.auger at redhat.com>
> Signed-off-by: Marc Zyngier <maz at kernel.org>
> ---
>  arch/arm64/kvm/nested.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
> index 7f80f385d9e8..3facd8918ae3 100644
> --- a/arch/arm64/kvm/nested.c
> +++ b/arch/arm64/kvm/nested.c
> @@ -71,8 +71,9 @@ void access_nested_id_reg(struct kvm_vcpu *v, struct sys_reg_params *p,
>                 break;
>
>         case SYS_ID_AA64MMFR0_EL1:
> -               /* Hide ECV, FGT, ExS, Secure Memory */
> -               val &= ~(GENMASK_ULL(63, 43)            |
> +               /* Hide ECV, ExS, Secure Memory */
> +               val &= ~(NV_FTR(MMFR0, ECV)             |
> +                        NV_FTR(MMFR0, EXS)             |
>                          NV_FTR(MMFR0, TGRAN4_2)        |
>                          NV_FTR(MMFR0, TGRAN16_2)       |
>                          NV_FTR(MMFR0, TGRAN64_2)       |
> --
> 2.34.1
>

Reviewed-by: Jing Zhang <jingzhangos at google.com>

Jing