diff options
Diffstat (limited to 'arch/arm64/kernel/ptrace.c')
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 5b9b4305248b..a31af7a1abe3 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -881,6 +881,13 @@ static int sve_set_common(struct task_struct *target, break; case ARM64_VEC_SME: target->thread.svcr |= SVCR_SM_MASK; + + /* + * Disable traps and ensure there is SME storage but + * preserve any currently set values in ZA/ZT. + */ + sme_alloc(target, false); + set_tsk_thread_flag(target, TIF_SME); break; default: WARN_ON_ONCE(1); @@ -1100,7 +1107,7 @@ static int za_set(struct task_struct *target, } /* Allocate/reinit ZA storage */ - sme_alloc(target); + sme_alloc(target, true); if (!target->thread.sme_state) { ret = -ENOMEM; goto out; @@ -1171,7 +1178,7 @@ static int zt_set(struct task_struct *target, return -EINVAL; if (!thread_za_enabled(&target->thread)) { - sme_alloc(target); + sme_alloc(target, true); if (!target->thread.sme_state) return -ENOMEM; } |