Messages in this thread | | | Date | Mon, 22 Apr 2024 08:38:40 +0530 | Subject | Re: [PATCH] arm64/sysreg: Update ID_AA64MMFR2_EL1 register | From | Anshuman Khandual <> |
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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.
https://developer.arm.com/documentation/ddi0601/2024-03/AArch64-Registers/ID-AA64MMFR2-EL1--AArch64-Memory-Model-Feature-Register-2
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