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| author | Andy Chiu <andy.chiu@sifive.com> | 2024-01-15 08:59:28 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-01-16 18:14:01 +0300 |
| commit | bd446f5df5afab212917f6732ba6442a5e8de85e (patch) | |
| tree | dce6c1b77b3260997ded34e7e30afc9a16c3d24b /arch/riscv/kernel/process.c | |
| parent | 5b6048f2ff710196c85ce14373febe8be5115bbe (diff) | |
| download | linux-bd446f5df5afab212917f6732ba6442a5e8de85e.tar.xz | |
riscv: vector: use kmem_cache to manage vector context
The allocation size of thread.vstate.datap is always riscv_v_vsize. So
it is possbile to use kmem_cache_* to manage the allocation. This gives
users more information regarding allocation of vector context via
/proc/slabinfo. And it potentially reduces the latency of the first-use
trap because of the allocation caches.
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20240115055929.4736-10-andy.chiu@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/kernel/process.c')
| -rw-r--r-- | arch/riscv/kernel/process.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 36993f408de4..862d59c3872e 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -179,7 +179,7 @@ void arch_release_task_struct(struct task_struct *tsk) { /* Free the vector context of datap. */ if (has_vector()) - kfree(tsk->thread.vstate.datap); + riscv_v_thread_free(tsk); } int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) @@ -228,3 +228,8 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) p->thread.sp = (unsigned long)childregs; /* kernel sp */ return 0; } + +void __init arch_task_cache_init(void) +{ + riscv_v_setup_ctx_cache(); +} |