diff options
| author | Mark Brown <broonie@kernel.org> | 2021-05-12 16:11:31 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-05-26 20:04:28 +0100 |
| commit | ad4711f962e08eff8d6e9b03f9670b1af6ea9395 (patch) | |
| tree | bb1979f64369118ce873375598f7f0bfc3115b86 /arch/arm64/include/asm/fpsimd.h | |
| parent | c9f6890bca111a879a8af1f2390ac49cf05b11df (diff) | |
arm64/sve: Skip flushing Z registers with 128 bit vectors
When the SVE vector length is 128 bits then there are no bits in the Z
registers which are not shared with the V registers so we can skip them
when zeroing state not shared with FPSIMD, this results in a minor
performance improvement.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210512151131.27877-4-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 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/fpsimd.h b/arch/arm64/include/asm/fpsimd.h index 2599504674b5..c072161d5c65 100644 --- a/arch/arm64/include/asm/fpsimd.h +++ b/arch/arm64/include/asm/fpsimd.h @@ -69,7 +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 void sve_flush_live(unsigned long vq_minus_1); extern void sve_load_from_fpsimd_state(struct user_fpsimd_state const *state, unsigned long vq_minus_1); extern unsigned int sve_get_vl(void); |