[PATCH v3 5/9] KVM: arm64: Handle CSSIDR2_EL1 and SMIDR_EL1 in a generic way

[Yao Yuan]

On Thu, Dec 04, 2025 at 09:48:02AM +0800, Marc Zyngier wrote:
> Now that we can handle ID registers using the FEAT_IDST infrastrcuture,
> get rid of the handling of CSSIDR2_EL1 and SMIDR_EL1.
>
> Signed-off-by: Marc Zyngier <maz at kernel.org>
> ---
>  arch/arm64/kvm/sys_regs.c | 2 --
>  1 file changed, 2 deletions(-)
>
> diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
> index ec3fbe0b8d525..ae1e72df1ed45 100644
> --- a/arch/arm64/kvm/sys_regs.c
> +++ b/arch/arm64/kvm/sys_regs.c
> @@ -3399,8 +3399,6 @@ static const struct sys_reg_desc sys_reg_descs[] = {
>  	{ SYS_DESC(SYS_CCSIDR_EL1), access_ccsidr },
>  	{ SYS_DESC(SYS_CLIDR_EL1), access_clidr, reset_clidr, CLIDR_EL1,
>  	  .set_user = set_clidr, .val = ~CLIDR_EL1_RES0 },
> -	{ SYS_DESC(SYS_CCSIDR2_EL1), undef_access },
> -	{ SYS_DESC(SYS_SMIDR_EL1), undef_access },
Hi Marc,

I checked the arm ARM to make sure these 2 belong to ID space.

Reviewed-by: Yuan Yao <yaoyuan at linux.alibaba.com>

>  	IMPLEMENTATION_ID(AIDR_EL1, GENMASK_ULL(63, 0)),
>  	{ SYS_DESC(SYS_CSSELR_EL1), access_csselr, reset_unknown, CSSELR_EL1 },
>  	ID_FILTERED(CTR_EL0, ctr_el0,
> --
> 2.47.3