This is a note to let you know that I've just added the patch titled
arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-fpsimd-sync-fpsimd-state-with-sve-for-sme-only-systems.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 507ea5dd92d23fcf10e4d1a68a443c86a49753ed Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@xxxxxxxxxx>
Date: Thu, 3 Aug 2023 19:33:22 +0100
Subject: arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems
From: Mark Brown <broonie@xxxxxxxxxx>
commit 507ea5dd92d23fcf10e4d1a68a443c86a49753ed upstream.
Currently we guard FPSIMD/SVE state conversions with a check for the system
supporting SVE but SME only systems may need to sync streaming mode SVE
state so add a check for SME support too. These functions are only used
by the ptrace code.
Fixes: e12310a0d30f ("arm64/sme: Implement ptrace support for streaming mode SVE registers")
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20230803-arm64-fix-ptrace-ssve-no-sve-v1-2-49df214bfb3e@xxxxxxxxxx
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/kernel/fpsimd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -634,7 +634,7 @@ static void fpsimd_to_sve(struct task_st
void *sst = task->thread.sve_state;
struct user_fpsimd_state const *fst = &task->thread.uw.fpsimd_state;
- if (!system_supports_sve())
+ if (!system_supports_sve() && !system_supports_sme())
return;
vq = sve_vq_from_vl(thread_get_cur_vl(&task->thread));
@@ -660,7 +660,7 @@ static void sve_to_fpsimd(struct task_st
unsigned int i;
__uint128_t const *p;
- if (!system_supports_sve())
+ if (!system_supports_sve() && !system_supports_sme())
return;
vl = thread_get_cur_vl(&task->thread);
Patches currently in stable-queue which might be from broonie@xxxxxxxxxx are
queue-6.1/net-netsec-ignore-phy-mode-on-synquacer-in-dt-mode.patch
queue-6.1/arm64-fpsimd-sync-fpsimd-state-with-sve-for-sme-only-systems.patch
queue-6.1/arm64-fpsimd-clear-sme-state-in-the-target-task-when-setting-the-vl.patch
queue-6.1/arm64-fpsimd-sync-and-zero-pad-fpsimd-state-for-streaming-sve.patch
