Commit 2cdeecdb authored Jan 16, 2023 by Mark Brown Committed by Catalin Marinas Jan 20, 2023

arm64/sme: Manually encode ZT0 load and store instructions



In order to avoid unrealistic toolchain requirements we manually encode the
instructions for loading and storing ZT0.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221208-arm64-sme2-v4-6-f2fa0aef982f@kernel.org


Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent 8ef55603

arch/arm64/include/asm/fpsimdmacros.h

+22 −0

Original line number	Diff line number	Diff line
		@@ -220,6 +220,28 @@
		\| ((\offset) & 7)
		.endm

		/*
		* LDR (ZT0)
		*
		* LDR ZT0, nx
		*/
		.macro _ldr_zt nx
		_check_general_reg \nx
		.inst 0xe11f8000 \
		\| (\nx << 5)
		.endm

		/*
		* STR (ZT0)
		*
		* STR ZT0, nx
		*/
		.macro _str_zt nx
		_check_general_reg \nx
		.inst 0xe13f8000 \
		\| (\nx << 5)
		.endm

		/*
		* Zero the entire ZA array
		* ZERO ZA