[PATCH v6 05/40] KVM: arm64: Make MPAMSM_EL1 accesses UNDEF

[Jinjie Ruan]

在 2026/3/13 22:45, Ben Horgan 写道:
> The MPAMSM_EL1 register controls the MPAM labeling for an SMCU, Streaming
> Mode Compute Unit. As there is no MPAM support in KVM, make sure MPAMSM_EL1
> accesses trigger an UNDEF.
> 
> Tested-by: Gavin Shan <gshan at redhat.com>
> Tested-by: Shaopeng Tan <tan.shaopeng at jp.fujitsu.com>
> Tested-by: Peter Newman <peternewman at google.com>
> Tested-by: Zeng Heng <zengheng4 at huawei.com>
> Tested-by: Punit Agrawal <punit.agrawal at oss.qualcomm.com>
> Reviewed-by: Zeng Heng <zengheng4 at huawei.com>
> Reviewed-by: Shaopeng Tan <tan.shaopeng at jp.fujitsu.com>
> Reviewed-by: Jonathan Cameron <jonathan.cameron at huawei.com>
> Reviewed-by: Gavin Shan <gshan at redhat.com>
> Acked-by: Marc Zyngier <maz at kernel.org>
> Signed-off-by: Ben Horgan <ben.horgan at arm.com>
> ---
> Changes since v2:
> Remove paragraph from commit on allowed range of values
> ---
>  arch/arm64/kvm/sys_regs.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
> index 1b4cacb6e918..0edd655934a9 100644
> --- a/arch/arm64/kvm/sys_regs.c
> +++ b/arch/arm64/kvm/sys_regs.c
> @@ -3376,6 +3376,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
>  
>  	{ SYS_DESC(SYS_MPAM1_EL1), undef_access },
>  	{ SYS_DESC(SYS_MPAM0_EL1), undef_access },
> +	{ SYS_DESC(SYS_MPAMSM_EL1), undef_access },

Reviewed-by: Jinjie Ruan <ruanjinjie at huawei.com>

> +
>  	{ SYS_DESC(SYS_VBAR_EL1), access_rw, reset_val, VBAR_EL1, 0 },
>  	{ SYS_DESC(SYS_DISR_EL1), NULL, reset_val, DISR_EL1, 0 },
>