@@ -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);