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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-08-18 20:52:25 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-08-18 20:52:25 +0200 |
| commit | d4ddefee5160dc477d0e30c9d7a10ce8861c3007 (patch) | |
| tree | a86a3dc8626dfdcd2f16c050cf0f14611522afc3 /arch/arm64/kernel/fpsimd.c | |
| parent | 3e13eee10521b236b6b96a0e1d7f29c6bf2fd989 (diff) | |
| parent | 2f43f549cd0b3164ea0345e59aa3958c0d243383 (diff) | |
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
"Two more SME fixes related to ptrace(): ensure that the SME is
properly set up for the target thread and that the thread sees
the ZT registers set via ptrace"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64/ptrace: Ensure that the task sees ZT writes on first use
arm64/ptrace: Ensure that SME is set up for target when writing SSVE state
Diffstat (limited to 'arch/arm64/kernel/fpsimd.c')
| -rw-r--r-- | arch/arm64/kernel/fpsimd.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 75c37b1c55aa..087c05aa960e 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -1285,9 +1285,9 @@ void fpsimd_release_task(struct task_struct *dead_task) * the interest of testability and predictability, the architecture * guarantees that when ZA is enabled it will be zeroed. */ -void sme_alloc(struct task_struct *task) +void sme_alloc(struct task_struct *task, bool flush) { - if (task->thread.sme_state) { + if (task->thread.sme_state && flush) { memset(task->thread.sme_state, 0, sme_state_size(task)); return; } @@ -1515,7 +1515,7 @@ void do_sme_acc(unsigned long esr, struct pt_regs *regs) } sve_alloc(current, false); - sme_alloc(current); + sme_alloc(current, true); if (!current->thread.sve_state || !current->thread.sme_state) { force_sig(SIGKILL); return; |