diff options
| author | Julien Grall <julien.grall@arm.com> | 2020-08-28 19:11:52 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-09-21 18:06:33 +0100 |
| commit | 1e530f1352a2709d7bcacdb8b6d42c8900ba2c80 (patch) | |
| tree | 704ec716cc72a2cdce2ef8dd0d2a3fb8c1c43868 /arch/arm64/include/asm/fpsimd.h | |
| parent | 6d40f05fad0babfb3e991edb2d0bd28a30a2f10c (diff) | |
arm64/sve: Implement a helper to flush SVE registers
Introduce a new helper that will zero all SVE registers but the first
128-bits of each vector. This will be used by subsequent patches to
avoid costly store/maipulate/reload sequences in places like do_sve_acc().
Signed-off-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Link: https://lore.kernel.org/r/20200828181155.17745-6-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/fpsimd.h')
| -rw-r--r-- | arch/arm64/include/asm/fpsimd.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/fpsimd.h b/arch/arm64/include/asm/fpsimd.h index 59f10dd13f12..958f642e930d 100644 --- a/arch/arm64/include/asm/fpsimd.h +++ b/arch/arm64/include/asm/fpsimd.h @@ -69,6 +69,7 @@ static inline void *sve_pffr(struct thread_struct *thread) extern void sve_save_state(void *state, u32 *pfpsr); extern void sve_load_state(void const *state, u32 const *pfpsr, unsigned long vq_minus_1); +extern void sve_flush_live(void); extern unsigned int sve_get_vl(void); struct arm64_cpu_capabilities; |