From 1175011a7d0030d49dc9c10bde36f08f26d0a8ee Mon Sep 17 00:00:00 2001 From: Joey Gouly Date: Fri, 10 Dec 2021 16:54:32 +0000 Subject: arm64: cpufeature: add HWCAP for FEAT_RPRES Add a new HWCAP to detect the Increased precision of Reciprocal Estimate and Reciprocal Square Root Estimate feature (FEAT_RPRES), introduced in Armv8.7. Also expose this to userspace in the ID_AA64ISAR2_EL1 feature register. Signed-off-by: Joey Gouly Cc: Will Deacon Cc: Jonathan Corbet Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20211210165432.8106-4-joey.gouly@arm.com Signed-off-by: Catalin Marinas --- Documentation/arm64/elf_hwcaps.rst | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation/arm64/elf_hwcaps.rst') diff --git a/Documentation/arm64/elf_hwcaps.rst b/Documentation/arm64/elf_hwcaps.rst index 247728d37911..b72ff17d600a 100644 --- a/Documentation/arm64/elf_hwcaps.rst +++ b/Documentation/arm64/elf_hwcaps.rst @@ -255,6 +255,10 @@ HWCAP2_AFP Functionality implied by ID_AA64MFR1_EL1.AFP == 0b0001. +HWCAP2_RPRES + + Functionality implied by ID_AA64ISAR2_EL1.RPRES == 0b0001. + 4. Unused AT_HWCAP bits ----------------------- -- cgit v1.2.3-59-g8ed1b