From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>
Cc: Dave Martin <Dave.Martin@arm.com>,
linux-arm-kernel@lists.infradead.org,
Mark Brown <broonie@kernel.org>
Subject: [PATCH v2 1/3] arm64/sve: Split _sve_flush macro into separate Z and predicate flushes
Date: Tue, 11 May 2021 17:04:44 +0100 [thread overview]
Message-ID: <20210511160446.42871-2-broonie@kernel.org> (raw)
In-Reply-To: <20210511160446.42871-1-broonie@kernel.org>
Trivial refactoring to support further work, no change to generated code.
Signed-off-by: Mark Brown <broonie@kernel.org>
---
arch/arm64/include/asm/fpsimdmacros.h | 4 +++-
arch/arm64/kernel/entry-fpsimd.S | 3 ++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/fpsimdmacros.h b/arch/arm64/include/asm/fpsimdmacros.h
index a2563992d2dc..059204477ce6 100644
--- a/arch/arm64/include/asm/fpsimdmacros.h
+++ b/arch/arm64/include/asm/fpsimdmacros.h
@@ -213,8 +213,10 @@
mov v\nz\().16b, v\nz\().16b
.endm
-.macro sve_flush
+.macro sve_flush_z
_for n, 0, 31, _sve_flush_z \n
+.endm
+.macro sve_flush_p_ffr
_for n, 0, 15, _sve_pfalse \n
_sve_wrffr 0
.endm
diff --git a/arch/arm64/kernel/entry-fpsimd.S b/arch/arm64/kernel/entry-fpsimd.S
index 3ecec60d3295..7921d58427c2 100644
--- a/arch/arm64/kernel/entry-fpsimd.S
+++ b/arch/arm64/kernel/entry-fpsimd.S
@@ -72,7 +72,8 @@ SYM_FUNC_END(sve_load_from_fpsimd_state)
/* Zero all SVE registers but the first 128-bits of each vector */
SYM_FUNC_START(sve_flush_live)
- sve_flush
+ sve_flush_z
+ sve_flush_p_ffr
ret
SYM_FUNC_END(sve_flush_live)
--
2.20.1
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next prev parent reply other threads:[~2021-05-11 16:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 16:04 [PATCH v2 0/3] arm64/sve: Trivial optimisation for 128 bit SVE vectors Mark Brown
2021-05-11 16:04 ` Mark Brown [this message]
2021-05-12 13:40 ` [PATCH v2 1/3] arm64/sve: Split _sve_flush macro into separate Z and predicate flushes Dave Martin
2021-05-11 16:04 ` [PATCH v2 2/3] arm64/sve: Use the sve_flush macros in sve_load_from_fpsimd_state() Mark Brown
2021-05-12 13:40 ` Dave Martin
2021-05-11 16:04 ` [PATCH v2 3/3] arm64/sve: Skip flushing Z registers with 128 bit vectors Mark Brown
2021-05-12 13:49 ` Dave Martin
2021-05-12 14:22 ` Mark Brown
2021-05-12 16:16 ` [PATCH v2 0/3] arm64/sve: Trivial optimisation for 128 bit SVE vectors Catalin Marinas
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