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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@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 1/8] arm64/fpsimd: Update documentation of do_sve_acc
Date: Mon, 29 Jun 2020 14:35:49 +0100	[thread overview]
Message-ID: <20200629133556.39825-2-broonie@kernel.org> (raw)
In-Reply-To: <20200629133556.39825-1-broonie@kernel.org>

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

fpsimd_restore_current_state() enables and disables the SVE access trap
based on TIF_SVE, not task_fpsimd_load(). Update the documentation of
do_sve_acc to reflect this behavior.

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/kernel/fpsimd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 55c8f3ec6705..1c6a82083d5c 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -928,7 +928,7 @@ void fpsimd_release_task(struct task_struct *dead_task)
  * the SVE access trap will be disabled the next time this task
  * reaches ret_to_user.
  *
- * TIF_SVE should be clear on entry: otherwise, task_fpsimd_load()
+ * TIF_SVE should be clear on entry: otherwise, fpsimd_restore_current_state()
  * would have disabled the SVE access trap for userspace during
  * ret_to_user, making an SVE access trap impossible in that case.
  */
-- 
2.20.1


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  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 ` Mark Brown [this message]
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 ` [PATCH v3 4/8] arm64/fpsimdmacros: Introduce a macro to update ZCR_EL1.LEN Mark Brown
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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