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@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 v3 4/8] arm64/fpsimdmacros: Introduce a macro to update ZCR_EL1.LEN
Date: Mon, 29 Jun 2020 14:35:52 +0100 [thread overview]
Message-ID: <20200629133556.39825-5-broonie@kernel.org> (raw)
In-Reply-To: <20200629133556.39825-1-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>
Link: https://lore.kernel.org/r/20190613161656.20765-5-julien.grall@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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next prev parent reply other threads:[~2020-06-29 13:42 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 13:35 [PATCH v3 0/8] arm64/sve: First steps towards optimizing syscalls Mark Brown
2020-06-29 13:35 ` [PATCH v3 1/8] arm64/fpsimd: Update documentation of do_sve_acc Mark Brown
2020-06-29 13:35 ` [PATCH v3 2/8] arm64/signal: Update the comment in preserve_sve_context Mark Brown
2020-06-29 13:35 ` [PATCH v3 3/8] arm64/fpsimdmacros: Allow the macro "for" to be used in more cases Mark Brown
2020-06-29 13:35 ` Mark Brown [this message]
2020-06-29 13:35 ` [PATCH v3 5/8] arm64/sve: Implement a helper to flush SVE registers Mark Brown
2020-07-15 16:52 ` Dave Martin
2020-06-29 13:35 ` [PATCH v3 6/8] arm64/sve: Implement a helper to load SVE registers from FPSIMD state Mark Brown
2020-07-15 16:52 ` Dave Martin
2020-06-29 13:35 ` [PATCH v3 7/8] arm64/sve: Don't disable SVE on syscalls return Mark Brown
2020-07-15 16:52 ` Dave Martin
2020-08-21 21:54 ` Mark Brown
2020-06-29 13:35 ` [PATCH v3 8/8] arm64/sve: Rework SVE trap access to use TIF_SVE_NEEDS_FLUSH Mark Brown
2020-07-15 16:52 ` Dave Martin
2020-07-15 16:49 ` [PATCH v3 0/8] arm64/sve: First steps towards optimizing syscalls Dave Martin
2020-07-15 17:11 ` Mark Brown
2020-07-20 10:44 ` Dave Martin
2020-07-21 2:43 ` zhang.lei
2020-07-21 22:34 ` Mark Brown
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