diff options
| -rw-r--r-- | arch/riscv/kernel/vector.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/arch/riscv/kernel/vector.c b/arch/riscv/kernel/vector.c index a7dec9230164..f9c8e19ab301 100644 --- a/arch/riscv/kernel/vector.c +++ b/arch/riscv/kernel/vector.c @@ -180,7 +180,7 @@ void riscv_v_vstate_ctrl_init(struct task_struct *tsk) next = riscv_v_ctrl_get_next(tsk); if (!next) { - if (riscv_v_implicit_uacc) + if (READ_ONCE(riscv_v_implicit_uacc)) cur = PR_RISCV_V_VSTATE_CTRL_ON; else cur = PR_RISCV_V_VSTATE_CTRL_OFF; @@ -243,3 +243,34 @@ long riscv_v_vstate_ctrl_set_current(unsigned long arg) return -EINVAL; } + +#ifdef CONFIG_SYSCTL + +static struct ctl_table riscv_v_default_vstate_table[] = { + { + .procname = "riscv_v_default_allow", + .data = &riscv_v_implicit_uacc, + .maxlen = sizeof(riscv_v_implicit_uacc), + .mode = 0644, + .proc_handler = proc_dobool, + }, + { } +}; + +static int __init riscv_v_sysctl_init(void) +{ + if (has_vector()) + if (!register_sysctl("abi", riscv_v_default_vstate_table)) + return -EINVAL; + return 0; +} + +#else /* ! CONFIG_SYSCTL */ +static int __init riscv_v_sysctl_init(void) { return 0; } +#endif /* ! CONFIG_SYSCTL */ + +static int riscv_v_init(void) +{ + return riscv_v_sysctl_init(); +} +core_initcall(riscv_v_init); |