Re: [PATCH 17/28] KVM: arm64: Add NV3 control bits to HCRX_EL2 sanitisation

[Joey Gouly <joey.gouly@arm.com>]

On Thu, Jul 02, 2026 at 05:02:37PM +0100, Marc Zyngier wrote:
> Expose the FEAT_NV3 control bits to the sanitisation code so that
> KVM stops moaning about the unattributed bits.
> 
> Signed-off-by: Marc Zyngier <maz@kernel.org>

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

> ---
>  arch/arm64/kvm/config.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/arch/arm64/kvm/config.c b/arch/arm64/kvm/config.c
> index 8d5e4aacf49c4..b9a9d65b973e6 100644
> --- a/arch/arm64/kvm/config.c
> +++ b/arch/arm64/kvm/config.c
> @@ -225,6 +225,7 @@ struct reg_feat_map_desc {
>  #define FEAT_HCX		ID_AA64MMFR1_EL1, HCX, IMP
>  #define FEAT_S2PIE		ID_AA64MMFR3_EL1, S2PIE, IMP
>  #define FEAT_GCIE		ID_AA64PFR2_EL1, GCIE, IMP
> +#define FEAT_NV3		ID_AA64MMFR4_EL1, NV_frac, NV3
>  
>  static bool not_feat_aa64el3(struct kvm *kvm)
>  {
> @@ -904,6 +905,11 @@ static const DECLARE_FEAT_MAP_FGT(hdfgwtr2_desc, hdfgwtr2_masks,
>  
>  
>  static const struct reg_bits_to_feat_map hcrx_feat_map[] = {
> +	NEEDS_FEAT(HCRX_EL2_NVTGE		|
> +		   HCRX_EL2_NVnTTLB		|
> +		   HCRX_EL2_NVnTTLBIS		|
> +		   HCRX_EL2_NVnTTLBOS,
> +		   FEAT_NV3),
>  	NEEDS_FEAT(HCRX_EL2_SRMASKEn, FEAT_SRMASK),
>  	NEEDS_FEAT(HCRX_EL2_PACMEn, feat_pauth_lr),
>  	NEEDS_FEAT(HCRX_EL2_EnFPM, FEAT_FPMR),
> -- 
> 2.47.3
>