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 1/8] arm64/fpsimd: Update documentation of do_sve_acc
Date: Thu, 13 Jun 2019 17:16:49 +0100 [thread overview]
Message-ID: <20190613161656.20765-2-julien.grall@arm.com> (raw)
In-Reply-To: <20190613161656.20765-1-julien.grall@arm.com>
TIF_SVE is cleared by fpsimd_restore_current_state() not
task_fpsimd_load(). Update the documentation of do_sve_acc to reflect
this behavior.
Signed-off-by: Julien Grall <julien.grall@arm.com>
---
Changes in v2:
- Fix typo in the commit message
---
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 a38bf74bcca8..92f418e4f989 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -853,7 +853,7 @@ 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.
*/
--
2.11.0
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next prev parent reply other threads:[~2019-06-13 16:17 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 ` Julien Grall [this message]
2019-06-13 16:19 ` [RFC PATCH v2 1/8] arm64/fpsimd: Update documentation of do_sve_acc 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 ` [RFC PATCH v2 4/8] arm64/fpsimdmacros: Introduce a macro to update ZCR_EL1.LEN Julien Grall
2019-06-21 15:32 ` 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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