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| author | Mark Brown <broonie@kernel.org> | 2021-08-12 21:11:43 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-08-24 16:44:23 +0100 |
| commit | 38ee3c5e36a134050df93ab911d4713e30a6cde5 (patch) | |
| tree | bed2c54cda2cf6508535b0d8c1307e89aefc8c4b /arch/arm64/kernel | |
| parent | 090bf6f84b4d23457a2116891e5de93bc995da90 (diff) | |
| download | linux-38ee3c5e36a134050df93ab911d4713e30a6cde5.tar.bz2 | |
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 <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210812201143.35578-1-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/entry-fpsimd.S | 13 |
1 files changed, 13 insertions, 0 deletions
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 |