diff options
Diffstat (limited to 'arch/arm64/kernel/fpsimd.c')
| -rw-r--r-- | arch/arm64/kernel/fpsimd.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index d5f659f476a8..794dd990da82 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -265,10 +265,10 @@ static void task_fpsimd_load(void) * * Softirqs (and preemption) must be disabled. */ -static void fpsimd_save(void) +void fpsimd_save(void) { struct user_fpsimd_state *st = __this_cpu_read(fpsimd_last_state.st); - /* set by fpsimd_bind_task_to_cpu() */ + /* set by fpsimd_bind_task_to_cpu() or fpsimd_bind_state_to_cpu() */ WARN_ON(!in_softirq() && !irqs_disabled()); @@ -986,7 +986,7 @@ void fpsimd_signal_preserve_current_state(void) * Associate current's FPSIMD context with this cpu * Preemption must be disabled when calling this function. */ -static void fpsimd_bind_task_to_cpu(void) +void fpsimd_bind_task_to_cpu(void) { struct fpsimd_last_state_struct *last = this_cpu_ptr(&fpsimd_last_state); @@ -1006,6 +1006,17 @@ static void fpsimd_bind_task_to_cpu(void) } } +void fpsimd_bind_state_to_cpu(struct user_fpsimd_state *st) +{ + struct fpsimd_last_state_struct *last = + this_cpu_ptr(&fpsimd_last_state); + + WARN_ON(!in_softirq() && !irqs_disabled()); + + last->st = st; + last->sve_in_use = false; +} + /* * Load the userland FPSIMD state of 'current' from memory, but only if the * FPSIMD state already held in the registers is /not/ the most recent FPSIMD @@ -1058,7 +1069,7 @@ void fpsimd_flush_task_state(struct task_struct *t) t->thread.fpsimd_cpu = NR_CPUS; } -static inline void fpsimd_flush_cpu_state(void) +void fpsimd_flush_cpu_state(void) { __this_cpu_write(fpsimd_last_state.st, NULL); set_thread_flag(TIF_FOREIGN_FPSTATE); |