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Diffstat (limited to 'arch/riscv/kernel/process.c')
-rw-r--r--arch/riscv/kernel/process.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index 4f21d970a1..e4bc61c4e5 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -27,8 +27,6 @@
#include <asm/vector.h>
#include <asm/cpufeature.h>
-register unsigned long gp_in_global __asm__("gp");
-
#if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_STACKPROTECTOR_PER_TASK)
#include <linux/stackprotector.h>
unsigned long __stack_chk_guard __read_mostly;
@@ -37,7 +35,7 @@ EXPORT_SYMBOL(__stack_chk_guard);
extern asmlinkage void ret_from_fork(void);
-void arch_cpu_idle(void)
+void noinstr arch_cpu_idle(void)
{
cpu_do_idle();
}
@@ -171,6 +169,7 @@ void flush_thread(void)
riscv_v_vstate_off(task_pt_regs(current));
kfree(current->thread.vstate.datap);
memset(&current->thread.vstate, 0, sizeof(struct __riscv_v_ext_state));
+ clear_tsk_thread_flag(current, TIF_RISCV_V_DEFER_RESTORE);
#endif
}
@@ -178,7 +177,7 @@ 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)
@@ -187,6 +186,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
*dst = *src;
/* clear entire V context, including datap for a new task */
memset(&dst->thread.vstate, 0, sizeof(struct __riscv_v_ext_state));
+ memset(&dst->thread.kernel_vstate, 0, sizeof(struct __riscv_v_ext_state));
+ clear_tsk_thread_flag(dst, TIF_RISCV_V_DEFER_RESTORE);
return 0;
}
@@ -204,7 +205,6 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
if (unlikely(args->fn)) {
/* Kernel thread */
memset(childregs, 0, sizeof(struct pt_regs));
- childregs->gp = gp_in_global;
/* Supervisor/Machine, irqs on: */
childregs->status = SR_PP | SR_PIE;
@@ -221,7 +221,15 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
childregs->a0 = 0; /* Return value of fork() */
p->thread.s[0] = 0;
}
+ p->thread.riscv_v_flags = 0;
+ if (has_vector())
+ riscv_v_thread_alloc(p);
p->thread.ra = (unsigned long)ret_from_fork;
p->thread.sp = (unsigned long)childregs; /* kernel sp */
return 0;
}
+
+void __init arch_task_cache_init(void)
+{
+ riscv_v_setup_ctx_cache();
+}