Re: [PATCH v4 10/29] arm64: enable the Permission Overlay Extension for EL0
From: Dave Martin <Dave.Martin@arm.com>
Date: 2024-08-01 16:31:56
Also in:
kvmarm, linux-fsdevel, linux-mm, linuxppc-dev
On Thu, Aug 01, 2024 at 05:04:03PM +0100, Joey Gouly wrote:
On Thu, Jul 25, 2024 at 04:49:08PM +0100, Dave Martin wrote:quoted
On Fri, May 03, 2024 at 02:01:28PM +0100, Joey Gouly wrote:quoted
Expose a HWCAP and ID_AA64MMFR3_EL1_S1POE to userspace, so they can be used to check if the CPU supports the feature. Signed-off-by: Joey Gouly <joey.gouly@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> --- This takes the last bit of HWCAP2, is this fine? What can we do about more features in the future? Documentation/arch/arm64/elf_hwcaps.rst | 2 ++ arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/kernel/cpufeature.c | 14 ++++++++++++++ arch/arm64/kernel/cpuinfo.c | 1 + 5 files changed, 19 insertions(+)diff --git a/Documentation/arch/arm64/elf_hwcaps.rst b/Documentation/arch/arm64/elf_hwcaps.rst index 448c1664879b..694f67fa07d1 100644 --- a/Documentation/arch/arm64/elf_hwcaps.rst +++ b/Documentation/arch/arm64/elf_hwcaps.rst@@ -365,6 +365,8 @@ HWCAP2_SME_SF8DP2 HWCAP2_SME_SF8DP4 Functionality implied by ID_AA64SMFR0_EL1.SF8DP4 == 0b1. +HWCAP2_POE + Functionality implied by ID_AA64MMFR3_EL1.S1POE == 0b0001.Nit: unintentionally dropped blank line before the section heading?Now there's only one blank line, I think c1932cac7902a8b0f7355515917dedc5412eb15d unintentionally added 2 blank lines, before that it was always 1!
Hmmm, true. Not a big deal, I guess. Cheers ---Dave