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authorMark Brown2023-08-03 19:33:22 +0100
committerGreg Kroah-Hartman2023-08-11 12:08:22 +0200
commit61f96da37dd4fb166c7d9bdf76016b8340e5f85f (patch)
treedcfb37393ec59dfa18df9d0cfc30d580a4bf7382 /arch/arm64
parent654c1dd350c746244e4dd4fe1fde577a2dc93d96 (diff)
arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems
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@kernel.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230803-arm64-fix-ptrace-ssve-no-sve-v1-2-49df214bfb3e@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/kernel/fpsimd.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index f7dbc0074cb0..356036babd09 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -634,7 +634,7 @@ static void fpsimd_to_sve(struct task_struct *task)
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_struct *task)
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);