From 38ee3c5e36a134050df93ab911d4713e30a6cde5 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Thu, 12 Aug 2021 21:11:43 +0100 Subject: arm64/sve: Add some comments for sve_save/load_state() The use of macros for the actual function bodies means legibility is always going to be a bit of a challenge, especially while we can't rely on SVE support in the toolchain, but this helps a little. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20210812201143.35578-1-broonie@kernel.org Signed-off-by: Catalin Marinas --- arch/arm64/kernel/entry-fpsimd.S | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch/arm64') diff --git a/arch/arm64/kernel/entry-fpsimd.S b/arch/arm64/kernel/entry-fpsimd.S index 0a7a64753878..196e921f61de 100644 --- a/arch/arm64/kernel/entry-fpsimd.S +++ b/arch/arm64/kernel/entry-fpsimd.S @@ -33,11 +33,24 @@ SYM_FUNC_END(fpsimd_load_state) #ifdef CONFIG_ARM64_SVE +/* + * Save the SVE state + * + * x0 - pointer to buffer for state + * x1 - pointer to storage for FPSR + */ SYM_FUNC_START(sve_save_state) sve_save 0, x1, 2 ret SYM_FUNC_END(sve_save_state) +/* + * Load the SVE state + * + * x0 - pointer to buffer for state + * x1 - pointer to storage for FPSR + * x2 - VQ-1 + */ SYM_FUNC_START(sve_load_state) sve_load 0, x1, x2, 3, x4 ret -- cgit