linux-kernel - Re: [PATCH 06/13] arm64/sysreg: Update ID_AA64ISAR2

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Date:   Mon, 11 Dec 2023 09:07:25 +0000
From:   Fuad Tabba <tabba@...gle.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Joey Gouly <joey.gouly@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/13] arm64/sysreg: Update ID_AA64ISAR2_EL1 defintion for
 DDI0601 2023-09

Hi Mark,

On Sat, Dec 9, 2023 at 1:03 AM Mark Brown <broonie@...nel.org> wrote:
>
> DDI0601 2023-09 defines some new fields in previously RES0 space in
> ID_AA64ISAR2_EL1, together with one new enum value. Update the system
> register definition to reflect this.
>
> Signed-off-by: Mark Brown <broonie@...nel.org>

> ---
>  arch/arm64/tools/sysreg | 24 ++++++++++++++++++++++--
>  1 file changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
> index c48a3b8d00ad..3f382f8d0f4a 100644
> --- a/arch/arm64/tools/sysreg
> +++ b/arch/arm64/tools/sysreg
> @@ -1365,7 +1365,14 @@ EndEnum
>  EndSysreg
>
>  Sysreg ID_AA64ISAR2_EL1        3       0       0       6       2
> -Res0   63:56
> +UnsignedEnum   63:60   ATS1A
> +       0b0000  NI
> +       0b0001  IMP
> +EndEnum
> +UnsignedEnum   59:56   LUT
> +       0b0000  NI
> +       0b0001  IMP
> +EndEnum
>  UnsignedEnum   55:52   CSSC
>         0b0000  NI
>         0b0001  IMP
> @@ -1374,7 +1381,19 @@ UnsignedEnum     51:48   RPRFM
>         0b0000  NI
>         0b0001  IMP
>  EndEnum
> -Res0   47:32
> +Res0   47:44
> +UnsignedEnum   43:40   PRFMSLC
> +       0b0000  NI
> +       0b0001  IMP
> +EndEnum
> +UnsignedEnum   39:36   SYSINSTR_128
> +       0b0000  NI
> +       0b0001  IMP
> +EndEnum
> +UnsignedEnum   35:32   SYSREG_128
> +       0b0000  NI
> +       0b0001  IMP
> +EndEnum
>  UnsignedEnum   31:28   CLRBHB
>         0b0000  NI
>         0b0001  IMP
> @@ -1398,6 +1417,7 @@ UnsignedEnum      15:12   APA3
>         0b0011  PAuth2
>         0b0100  FPAC
>         0b0101  FPACCOMBINE
> +       0b0110  PAUTH_LR

Nit: PAuth and PAuth2 only have the PA as uppercase in this file,
which matches the spec. Should PAuth_LR be the same?

Otherwise,
Reviewed-by: Fuad Tabba <tabba@...gle.com>

Cheers,
/fuad


>  EndEnum
>  UnsignedEnum   11:8    GPA3
>         0b0000  NI
>
> --
> 2.39.2
>