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From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
	 Will Deacon <will@kernel.org>, Oleg Nesterov <oleg@redhat.com>,
	 Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
	 Alexandru Elisei <alexandru.elisei@arm.com>,
	 Suzuki K Poulose <suzuki.poulose@arm.com>,
	 Oliver Upton <oliver.upton@linux.dev>,
	Shuah Khan <shuah@kernel.org>
Cc: Alan Hayward <alan.hayward@arm.com>,
	 Luis Machado <luis.machado@arm.com>,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	 linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,  kvmarm@lists.linux.dev,
	linux-kselftest@vger.kernel.org,  Mark Brown <broonie@kernel.org>
Subject: [PATCH v4 06/21] arm64/sme: Manually encode ZT0 load and store instructions
Date: Mon, 16 Jan 2023 16:04:41 +0000	[thread overview]
Message-ID: <20221208-arm64-sme2-v4-6-f2fa0aef982f@kernel.org> (raw)
In-Reply-To: <20221208-arm64-sme2-v4-0-f2fa0aef982f@kernel.org>

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>
---
 arch/arm64/include/asm/fpsimdmacros.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/include/asm/fpsimdmacros.h b/arch/arm64/include/asm/fpsimdmacros.h
index 5e0910cf4832..cd03819a3b68 100644
--- a/arch/arm64/include/asm/fpsimdmacros.h
+++ b/arch/arm64/include/asm/fpsimdmacros.h
@@ -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

-- 
2.34.1


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  parent reply	other threads:[~2023-01-16 16:07 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-16 16:04 [PATCH v4 00/21] arm64/sme: Support SME 2 and SME 2.1 Mark Brown
2023-01-16 16:04 ` [PATCH v4 01/21] arm64/sme: Rename za_state to sme_state Mark Brown
2023-01-16 16:04 ` [PATCH v4 02/21] arm64: Document boot requirements for SME 2 Mark Brown
2023-01-16 16:04 ` [PATCH v4 03/21] arm64/sysreg: Update system registers for SME 2 and 2.1 Mark Brown
2023-01-16 16:04 ` [PATCH v4 04/21] arm64/sme: Document SME 2 and SME 2.1 ABI Mark Brown
2023-01-16 16:04 ` [PATCH v4 05/21] arm64/esr: Document ISS for ZT0 being disabled Mark Brown
2023-01-16 16:04 ` Mark Brown [this message]
2023-01-16 16:04 ` [PATCH v4 07/21] arm64/sme: Enable host kernel to access ZT0 Mark Brown
2023-02-06  9:31   ` Marc Zyngier
2023-02-06 13:02     ` Mark Brown
2023-02-06 16:44     ` Catalin Marinas
2023-01-16 16:04 ` [PATCH v4 08/21] arm64/sme: Add basic enumeration for SME2 Mark Brown
2023-01-16 16:04 ` [PATCH v4 09/21] arm64/sme: Provide storage for ZT0 Mark Brown
2023-01-16 16:04 ` [PATCH v4 10/21] arm64/sme: Implement context switching " Mark Brown
2023-01-16 16:04 ` [PATCH v4 11/21] arm64/sme: Implement signal handling for ZT Mark Brown
2023-01-16 16:04 ` [PATCH v4 12/21] arm64/sme: Implement ZT0 ptrace support Mark Brown
2023-01-16 16:04 ` [PATCH v4 13/21] arm64/sme: Add hwcaps for SME 2 and 2.1 features Mark Brown
2023-01-16 16:04 ` [PATCH v4 14/21] kselftest/arm64: Add a stress test program for ZT0 Mark Brown
2023-01-16 16:04 ` [PATCH v4 15/21] kselftest/arm64: Cover ZT in the FP stress test Mark Brown
2023-01-16 16:04 ` [PATCH v4 16/21] kselftest/arm64: Enumerate SME2 in the signal test utility code Mark Brown
2023-01-16 16:04 ` [PATCH v4 17/21] kselftest/arm64: Teach the generic signal context validation about ZT Mark Brown
2023-01-16 16:04 ` [PATCH v4 18/21] kselftest/arm64: Add test coverage for ZT register signal frames Mark Brown
2023-01-16 16:04 ` [PATCH v4 19/21] kselftest/arm64: Add SME2 coverage to syscall-abi Mark Brown
2023-01-16 16:04 ` [PATCH v4 20/21] kselftest/arm64: Add coverage of the ZT ptrace regset Mark Brown
2023-01-16 16:04 ` [PATCH v4 21/21] kselftest/arm64: Add coverage of SME 2 and 2.1 hwcaps Mark Brown
2023-01-20 16:59 ` [PATCH v4 00/21] arm64/sme: Support SME 2 and SME 2.1 Catalin Marinas

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