Messages in this thread | | | Date | Mon, 22 Apr 2024 18:16:13 +0100 | From | Will Deacon <> | Subject | Re: [PATCH] arm64/sysreg: Update ID_AA64MMFR2_EL1 register |
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On Mon, Apr 22, 2024 at 08:38:40AM +0530, Anshuman Khandual wrote: > > > On 4/19/24 19:16, Will Deacon wrote: > > On Fri, Apr 19, 2024 at 07:43:25AM +0530, Anshuman Khandual wrote: > >> This updates ID_AA64MMFR2_EL1.VARange register fields as per the definition > >> based on DDI0601 2024-03. > >> > >> Cc: Catalin Marinas <catalin.marinas@arm.com> > >> Cc: Will Deacon <will@kernel.org> > >> Cc: Mark Brown <broonie@kernel.org> > >> Cc: linux-arm-kernel@lists.infradead.org > >> Cc: linux-kernel@vger.kernel.org > >> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> > >> --- > >> This applies on v6.9-rc4 > >> > >> arch/arm64/tools/sysreg | 1 + > >> 1 file changed, 1 insertion(+) > >> > >> diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg > >> index a4c1dd4741a4..6d7213dcbeb5 100644 > >> --- a/arch/arm64/tools/sysreg > >> +++ b/arch/arm64/tools/sysreg > >> @@ -1739,6 +1739,7 @@ EndEnum > >> UnsignedEnum 19:16 VARange > >> 0b0000 48 > >> 0b0001 52 > >> + 0b0010 56 > > > > Is anybody using this? I'm not sure there's a lot of value in adding > > these fields one-by-one for the sake of completeness. > > This is not being used currently but will be required for upcoming > features. I was under the impression that register fields (atleast > for the ID registers) should be kept updated, with latest released > spec ? Besides lately arch/arm64/tools/sysreg serves as very good > reference for all necessary register fields.
Why? The linux headers aren't documenting the architecture.
Will
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