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From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>
Cc: Julien Grall <julien@xen.org>,
	Zhang Lei <zhang.lei@jp.fujitsu.com>,
	Julien Grall <julien.grall@arm.com>,
	Mark Brown <broonie@kernel.org>,
	Dave Martin <Dave.Martin@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Daniel Kiss <Daniel.Kiss@arm.com>
Subject: [PATCH v4 4/8] arm64/fpsimdmacros: Introduce a macro to update ZCR_EL1.LEN
Date: Fri, 28 Aug 2020 19:11:51 +0100	[thread overview]
Message-ID: <20200828181155.17745-5-broonie@kernel.org> (raw)
In-Reply-To: <20200828181155.17745-1-broonie@kernel.org>

From: Julien Grall <julien.grall@arm.com>

A follow-up patch will need to update ZCR_EL1.LEN.

Add a macro that could be re-used in the current and new places to
avoid code duplication.

Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 arch/arm64/include/asm/fpsimdmacros.h | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/include/asm/fpsimdmacros.h b/arch/arm64/include/asm/fpsimdmacros.h
index 75293f111a6b..feef5b371fba 100644
--- a/arch/arm64/include/asm/fpsimdmacros.h
+++ b/arch/arm64/include/asm/fpsimdmacros.h
@@ -187,6 +187,17 @@
 	.purgem _for__body
 .endm
 
+/* Update ZCR_EL1.LEN with the new VQ */
+.macro sve_load_vq xvqminus1, xtmp, xtmp2
+		mrs_s		\xtmp, SYS_ZCR_EL1
+		bic		\xtmp2, \xtmp, ZCR_ELx_LEN_MASK
+		orr		\xtmp2, \xtmp2, \xvqminus1
+		cmp		\xtmp2, \xtmp
+		b.eq		921f
+		msr_s		SYS_ZCR_EL1, \xtmp2	//self-synchronising
+921:
+.endm
+
 .macro sve_save nxbase, xpfpsr, nxtmp
  _for n, 0, 31,	_sve_str_v	\n, \nxbase, \n - 34
  _for n, 0, 15,	_sve_str_p	\n, \nxbase, \n - 16
@@ -201,13 +212,7 @@
 .endm
 
 .macro sve_load nxbase, xpfpsr, xvqminus1, nxtmp, xtmp2
-		mrs_s		x\nxtmp, SYS_ZCR_EL1
-		bic		\xtmp2, x\nxtmp, ZCR_ELx_LEN_MASK
-		orr		\xtmp2, \xtmp2, \xvqminus1
-		cmp		\xtmp2, x\nxtmp
-		b.eq		921f
-		msr_s		SYS_ZCR_EL1, \xtmp2	// self-synchronising
-921:
+		sve_load_vq	\xvqminus1, x\nxtmp, \xtmp2
  _for n, 0, 31,	_sve_ldr_v	\n, \nxbase, \n - 34
 		_sve_ldr_p	0, \nxbase
 		_sve_wrffr	0
-- 
2.20.1


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  parent reply	other threads:[~2020-08-28 18:16 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-28 18:11 [PATCH v4 0/8] arm64/sve: First steps towards optimizing syscalls Mark Brown
2020-08-28 18:11 ` [PATCH v4 1/8] arm64/fpsimd: Update documentation of do_sve_acc Mark Brown
2020-08-28 18:11 ` [PATCH v4 2/8] arm64/signal: Update the comment in preserve_sve_context Mark Brown
2020-08-28 18:11 ` [PATCH v4 3/8] arm64/fpsimdmacros: Allow the macro "for" to be used in more cases Mark Brown
2020-09-21 12:38   ` Will Deacon
2020-09-21 16:53     ` Dave Martin
2020-09-21 18:09       ` Mark Brown
2020-09-22 13:51         ` Dave Martin
2020-09-22 13:59           ` Mark Brown
2020-09-22 14:07             ` Dave Martin
2020-08-28 18:11 ` Mark Brown [this message]
2020-08-28 18:11 ` [PATCH v4 5/8] arm64/sve: Implement a helper to flush SVE registers Mark Brown
2020-08-28 18:11 ` [PATCH v4 6/8] arm64/sve: Implement a helper to load SVE registers from FPSIMD state Mark Brown
2020-08-28 18:11 ` [PATCH v4 7/8] arm64/sve: Don't disable SVE on syscalls return Mark Brown
2020-09-21 12:36   ` Will Deacon
2020-09-21 18:03     ` Mark Brown
2020-09-22 14:03       ` Dave Martin
2020-09-22 16:04         ` Mark Brown
2020-08-28 18:11 ` [PATCH v4 8/8] arm64/sve: Rework SVE trap access to use TIF_SVE_NEEDS_FLUSH Mark Brown
2020-09-21 12:42 ` [PATCH v4 0/8] arm64/sve: First steps towards optimizing syscalls Will Deacon
2020-09-21 12:56   ` Mark Brown
2020-09-21 13:08     ` Will Deacon
2020-09-21 18:17 ` Will Deacon

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