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| author | Mark Brown <broonie@kernel.org> | 2022-04-19 12:22:22 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-04-22 18:51:00 +0100 |
| commit | af7167d6d2675f3343eff3ad6c9b4a8e30122e2c (patch) | |
| tree | 3078283fea103457faec6f0aa8caa1d611a04b93 /arch/arm64/kernel/entry-fpsimd.S | |
| parent | b40c559b45bec736f588c57dd5be967fe573058b (diff) | |
| download | linux-af7167d6d2675f3343eff3ad6c9b4a8e30122e2c.tar.bz2 | |
arm64/sme: Implement streaming SVE context switching
When in streaming mode we need to save and restore the streaming mode
SVE register state rather than the regular SVE register state. This uses
the streaming mode vector length and omits FFR but is otherwise identical,
if TIF_SVE is enabled when we are in streaming mode then streaming mode
takes precedence.
This does not handle use of streaming SVE state with KVM, ptrace or
signals. This will be updated in further patches.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419112247.711548-15-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/entry-fpsimd.S')
| -rw-r--r-- | arch/arm64/kernel/entry-fpsimd.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/kernel/entry-fpsimd.S b/arch/arm64/kernel/entry-fpsimd.S index deee5f01462e..6f88c0f86d50 100644 --- a/arch/arm64/kernel/entry-fpsimd.S +++ b/arch/arm64/kernel/entry-fpsimd.S @@ -94,4 +94,9 @@ SYM_FUNC_START(sme_get_vl) ret SYM_FUNC_END(sme_get_vl) +SYM_FUNC_START(sme_set_vq) + sme_load_vq x0, x1, x2 + ret +SYM_FUNC_END(sme_set_vq) + #endif /* CONFIG_ARM64_SME */ |