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arm64/sme: Don't use streaming mode to probe the maximum SME VL
[ Upstream commit fcd3d2c ] During development the architecture added the RDSVL instruction which means we do not need to enter streaming mode to enumerate the SME VLs, use it when we probe the maximum supported VL. Other users were already updated. No functional change. Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20221223-arm64-sme-probe-max-v1-1-cbde68f67ad0@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Stable-dep-of: 01948b0 ("arm64/fpsimd: Only provide the length to cpufeature for xCR registers") Signed-off-by: Sasha Levin <sashal@kernel.org>
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