diff options
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index a31af7a1abe3..187aa2b175b4 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -1177,6 +1177,11 @@ static int zt_set(struct task_struct *target, if (!system_supports_sme2()) return -EINVAL; + /* Ensure SVE storage in case this is first use of SME */ + sve_alloc(target, false); + if (!target->thread.sve_state) + return -ENOMEM; + if (!thread_za_enabled(&target->thread)) { sme_alloc(target, true); if (!target->thread.sme_state) @@ -1186,8 +1191,10 @@ static int zt_set(struct task_struct *target, ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, thread_zt_state(&target->thread), 0, ZT_SIG_REG_BYTES); - if (ret == 0) + if (ret == 0) { target->thread.svcr |= SVCR_ZA_MASK; + set_tsk_thread_flag(target, TIF_SME); + } fpsimd_flush_task_state(target); |