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authorAndy Chiu <andy.chiu@sifive.com>2024-01-15 08:59:28 +0300
committerPalmer Dabbelt <palmer@rivosinc.com>2024-01-16 18:14:01 +0300
commitbd446f5df5afab212917f6732ba6442a5e8de85e (patch)
treedce6c1b77b3260997ded34e7e30afc9a16c3d24b /arch/riscv/kernel/process.c
parent5b6048f2ff710196c85ce14373febe8be5115bbe (diff)
downloadlinux-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.c7
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();
+}