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arm64/sve: Add some comments for sve_save/load_state()

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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 <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210812201143.35578-1-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Brown 2021-08-12 21:11:43 +01:00 committed by Catalin Marinas
parent 090bf6f84b
commit 38ee3c5e36
1 changed files with 13 additions and 0 deletions
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13
arch/arm64/kernel/entry-fpsimd.S
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@ -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