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From: Julien Grall <julien.grall@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Anton.Kirilov@arm.com, catalin.marinas@arm.com,
	will.deacon@arm.com, oleg@redhat.com, zhang.lei@jp.fujitsu.com,
	Julien Grall <julien.grall@arm.com>,
	alex.bennee@linaro.org, Dave.Martin@arm.com, Daniel.Kiss@arm.com
Subject: [RFC PATCH v2 4/8] arm64/fpsimdmacros: Introduce a macro to update ZCR_EL1.LEN
Date: Thu, 13 Jun 2019 17:16:52 +0100	[thread overview]
Message-ID: <20190613161656.20765-5-julien.grall@arm.com> (raw)
In-Reply-To: <20190613161656.20765-1-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>

---
    Changes in v2:
        - Fix typo in the commit message
---
 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 e2ab77dd9b4f..5e291d9c1ba0 100644
--- a/arch/arm64/include/asm/fpsimdmacros.h
+++ b/arch/arm64/include/asm/fpsimdmacros.h
@@ -198,6 +198,17 @@
 	.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
@@ -212,13 +223,7 @@
 .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
-- 
2.11.0


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  parent reply	other threads:[~2019-06-13 16:18 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-13 16:16 [RFC PATCH v2 0/8] arm64/sve: First steps towards optimizing syscalls Julien Grall
2019-06-13 16:16 ` [RFC PATCH v2 1/8] arm64/fpsimd: Update documentation of do_sve_acc Julien Grall
2019-06-13 16:19   ` Julien Grall
2019-06-21 15:32   ` Dave Martin
2019-06-13 16:16 ` [RFC PATCH v2 2/8] arm64/signal: Update the comment in preserve_sve_context Julien Grall
2019-06-21 15:32   ` Dave Martin
2019-06-13 16:16 ` [RFC PATCH v2 3/8] arm64/fpsimdmacros: Allow the macro "for" to be used in more cases Julien Grall
2019-06-21 15:32   ` Dave Martin
2019-06-24 16:10     ` Julien Grall
2019-06-25  9:35       ` Dave Martin
2019-06-13 16:16 ` Julien Grall [this message]
2019-06-21 15:32   ` [RFC PATCH v2 4/8] arm64/fpsimdmacros: Introduce a macro to update ZCR_EL1.LEN Dave Martin
2019-06-13 16:16 ` [RFC PATCH v2 5/8] arm64/sve: Implement an helper to flush SVE registers Julien Grall
2019-06-21 15:33   ` Dave Martin
2019-06-24 16:28     ` Julien Grall
2019-06-25  9:37       ` Dave Martin
2019-06-13 16:16 ` [RFC PATCH v2 6/8] arm64/sve: Implement an helper to load SVE registers from FPSIMD state Julien Grall
2019-06-21 15:33   ` Dave Martin
2019-06-24 16:29     ` Julien Grall
2019-06-13 16:16 ` [RFC PATCH v2 7/8] arm64/sve: Don't disable SVE on syscalls return Julien Grall
2019-06-21 15:33   ` Dave Martin
2019-06-24 16:44     ` Julien Grall
2019-06-25  9:41       ` Dave Martin
2019-07-04 14:15     ` Catalin Marinas
2019-08-02 11:06       ` Julien Grall
2019-06-13 16:16 ` [RFC PATCH v2 8/8] arm64/sve: Rework SVE trap access to use TIF_SVE_NEEDS_FLUSH Julien Grall
2019-06-21 15:33   ` Dave Martin
2019-06-21 15:32 ` [RFC PATCH v2 0/8] arm64/sve: First steps towards optimizing syscalls Dave Martin

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