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authorMark Brown <broonie@kernel.org>2021-10-19 20:22:13 +0300
committerWill Deacon <will@kernel.org>2021-10-21 12:18:17 +0300
commitddc806b5c4752d35bdaa4dfa2aaa72785711a3da (patch)
tree7902423b7289171ea41c732e7077f5dd0d17a510 /arch/arm64/include/asm/fpsimd.h
parentb5bc00ffddc08c20a799514cbcfd2abaa6718014 (diff)
downloadlinux-ddc806b5c4752d35bdaa4dfa2aaa72785711a3da.tar.xz
arm64/sve: Explicitly load vector length when restoring SVE state
Currently when restoring the SVE state we supply the SVE vector length as an argument to sve_load_state() and the underlying macros. This becomes inconvenient with the addition of SME since we may need to restore any combination of SVE and SME vector lengths, and we already separately restore the vector length in the KVM code. We don't need to know the vector length during the actual register load since the SME load instructions can index into the data array for us. Refactor the interface so we explicitly set the vector length separately to restoring the SVE registers in preparation for adding SME support, no functional change should be involved. Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20211019172247.3045838-9-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.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/fpsimd.h b/arch/arm64/include/asm/fpsimd.h
index 5a1f79a4a500..1d0b5fa253a0 100644
--- a/arch/arm64/include/asm/fpsimd.h
+++ b/arch/arm64/include/asm/fpsimd.h
@@ -67,7 +67,7 @@ static inline void *sve_pffr(struct thread_struct *thread)
extern void sve_save_state(void *state, u32 *pfpsr, int save_ffr);
extern void sve_load_state(void const *state, u32 const *pfpsr,
- int restore_ffr, unsigned long vq_minus_1);
+ int restore_ffr);
extern void sve_flush_live(bool flush_ffr, unsigned long vq_minus_1);
extern unsigned int sve_get_vl(void);
extern void sve_set_vq(unsigned long vq_minus_1);