From 956ca3a4eb81c1b8cc3226af3083847544dcb098 Mon Sep 17 00:00:00 2001 From: Amit Daniel Kachhap Date: Thu, 17 Nov 2022 06:58:31 +0100 Subject: ARM: 9272/1: vfp: Add hwcap for FEAT_AA32I8MM Int8 matrix multiplication (FEAT_AA32I8MM) is a feature present in AArch32 state for Armv8 and is represented by ISAR6.I8MM identification register. This feature denotes the presence of VSMMLA, VSUDOT, VUMMLA, VUSMMLA and VUSDOT instructions and hence adding a hwcap will enable the userspace to check it before trying to use those instructions. Reviewed-by: Linus Walleij Signed-off-by: Amit Daniel Kachhap Signed-off-by: Russell King (Oracle) --- arch/arm/vfp/vfpmodule.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/arm/vfp/vfpmodule.c') diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index ff574cb8a0b9..281110423871 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -857,6 +857,12 @@ static int __init vfp_init(void) */ if (cpuid_feature_extract_field(isar6, 20) == 0x1) elf_hwcap |= HWCAP_ASIMDBF16; + /* + * Check for the presence of Advanced SIMD and floating point + * Int8 matrix multiplication instructions instructions. + */ + if (cpuid_feature_extract_field(isar6, 24) == 0x1) + elf_hwcap |= HWCAP_I8MM; /* Extract the architecture version on pre-cpuid scheme */ } else { -- cgit