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arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems

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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: e12310a0d3 ("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>
This commit is contained in:
Mark Brown 2023-08-03 19:33:22 +01:00 committed by Greg Kroah-Hartman
parent 654c1dd350
commit 61f96da37d
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/kernel/fpsimd.c
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@ -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);