Re: [PATCH 1/5] arm64: spe: Allow new bits in SPE filter register

[Leo Yan]

Hi Andre,

On Tue, Sep 22, 2020 at 11:12:21AM +0100, Andre Przywara wrote:
> The ARMv8.3-SPE extension adds some new bits for the event filter.
> 
> Remove bits 11, 17 and 18 from the RES0 mask, so they can be used
> correctly.
> 
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
> ---
>  arch/arm64/include/asm/sysreg.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
> index 554a7e8ecb07..efca4ee28671 100644
> --- a/arch/arm64/include/asm/sysreg.h
> +++ b/arch/arm64/include/asm/sysreg.h
> @@ -281,7 +281,7 @@
>  #define SYS_PMSFCR_EL1_ST_SHIFT		18
>  
>  #define SYS_PMSEVFR_EL1			sys_reg(3, 0, 9, 9, 5)
> -#define SYS_PMSEVFR_EL1_RES0		0x0000ffff00ff0f55UL
> +#define SYS_PMSEVFR_EL1_RES0		0x0000ffff00f90755UL

This patch is duplicate with Wei Li's patch [1].  You could see there
have some discussion and Will gave suggestions [2] for the patch, this
would be a good start point to continue this work.

Thanks,
Leo

[1] https://www.spinics.net/lists/arm-kernel/msg825364.html
[2] https://www.spinics.net/lists/arm-kernel/msg835733.html

>  
>  #define SYS_PMSLATFR_EL1		sys_reg(3, 0, 9, 9, 6)
>  #define SYS_PMSLATFR_EL1_MINLAT_SHIFT	0
> -- 
> 2.17.1
>