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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-03 05:08:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-03 05:08:49 +0000 |
commit | 76047c0312414915035f4ebbaa533fe3817a21e0 (patch) | |
tree | 86f79ba3c1f753b1d39be793455035794fade031 /arch/arm64/kernel/fpsimd.c | |
parent | Adding upstream version 6.8.11. (diff) | |
download | linux-76047c0312414915035f4ebbaa533fe3817a21e0.tar.xz linux-76047c0312414915035f4ebbaa533fe3817a21e0.zip |
Adding upstream version 6.8.12.upstream/6.8.12
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/kernel/fpsimd.c')
-rw-r--r-- | arch/arm64/kernel/fpsimd.c | 44 |
1 files changed, 22 insertions, 22 deletions
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index f27acca550..5e7b0eb468 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -1518,6 +1518,27 @@ static void fpsimd_save_kernel_state(struct task_struct *task) task->thread.kernel_fpsimd_cpu = smp_processor_id(); } +/* + * Invalidate any task's FPSIMD state that is present on this cpu. + * The FPSIMD context should be acquired with get_cpu_fpsimd_context() + * before calling this function. + */ +static void fpsimd_flush_cpu_state(void) +{ + WARN_ON(!system_supports_fpsimd()); + __this_cpu_write(fpsimd_last_state.st, NULL); + + /* + * Leaving streaming mode enabled will cause issues for any kernel + * NEON and leaving streaming mode or ZA enabled may increase power + * consumption. + */ + if (system_supports_sme()) + sme_smstop(); + + set_thread_flag(TIF_FOREIGN_FPSTATE); +} + void fpsimd_thread_switch(struct task_struct *next) { bool wrong_task, wrong_cpu; @@ -1535,7 +1556,7 @@ void fpsimd_thread_switch(struct task_struct *next) if (test_tsk_thread_flag(next, TIF_KERNEL_FPSTATE)) { fpsimd_load_kernel_state(next); - set_tsk_thread_flag(next, TIF_FOREIGN_FPSTATE); + fpsimd_flush_cpu_state(); } else { /* * Fix up TIF_FOREIGN_FPSTATE to correctly describe next's @@ -1825,27 +1846,6 @@ void fpsimd_flush_task_state(struct task_struct *t) } /* - * Invalidate any task's FPSIMD state that is present on this cpu. - * The FPSIMD context should be acquired with get_cpu_fpsimd_context() - * before calling this function. - */ -static void fpsimd_flush_cpu_state(void) -{ - WARN_ON(!system_supports_fpsimd()); - __this_cpu_write(fpsimd_last_state.st, NULL); - - /* - * Leaving streaming mode enabled will cause issues for any kernel - * NEON and leaving streaming mode or ZA enabled may increase power - * consumption. - */ - if (system_supports_sme()) - sme_smstop(); - - set_thread_flag(TIF_FOREIGN_FPSTATE); -} - -/* * Save the FPSIMD state to memory and invalidate cpu view. * This function must be called with preemption disabled. */ |