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UPSTREAM: arm64/sme: Provide Kconfig for SME

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Now that basline support for the Scalable Matrix Extension (SME) is present
introduce the Kconfig option allowing it to be built. While the feature
registers don't impose a strong requirement for a system with SME to
support SVE at runtime the support for streaming mode SVE is mostly
shared with normal SVE so depend on SVE.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419112247.711548-28-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit a1f4ccd25cc256255813f584f10e5527369d4a02)
Signed-off-by: Will Deacon <willdeacon@google.com>
Bug: 233587962
Bug: 233588291
Change-Id: I9b3f9152ff1960c29959c6fecc00f7ee3048fe67
This commit is contained in:
Mark Brown
2022-04-19 12:22:35 +01:00
committed by Will Deacon
parent 06e093b13b
commit 80eeeb1eae
1 changed files with 11 additions and 0 deletions
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11
arch/arm64/Kconfig
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@@ -1857,6 +1857,17 @@ config ARM64_SVE
booting the kernel. If unsure and you are not observing these
symptoms, you should assume that it is safe to say Y.
config ARM64_SME
bool "ARM Scalable Matrix Extension support"
default y
depends on ARM64_SVE
help
The Scalable Matrix Extension (SME) is an extension to the AArch64
execution state which utilises a substantial subset of the SVE
instruction set, together with the addition of new architectural
register state capable of holding two dimensional matrix tiles to
enable various matrix operations.
config ARM64_MODULE_PLTS
bool "Use PLTs to allow module memory to spill over into vmalloc area"
depends on MODULES