Manually patched mc^2 related codewip-mc2-cache-slack

1 files changed, 78 insertions, 0 deletions

diff --git a/litmus/mc2_common.c b/litmus/mc2_common.c
new file mode 100644
index 000000000000..a8ea5d9889f3
--- /dev/null
+++ b/litmus/mc2_common.c
@@ -0,0 +1,78 @@
+/*
+ * litmus/mc2_common.c
+ *
+ * Common functions for MC2 plugin.
+ */
+
+#include <linux/percpu.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <asm/uaccess.h>
+
+#include <litmus/litmus.h>
+#include <litmus/sched_plugin.h>
+#include <litmus/sched_trace.h>
+
+#include <litmus/mc2_common.h>
+
+long mc2_task_client_init(struct task_client *tc, struct mc2_task *mc2_param, struct task_struct *tsk, struct reservation *res)
+{
+        task_client_init(tc, tsk, res);
+        if ((mc2_param->crit < CRIT_LEVEL_A) ||
+                (mc2_param->crit > CRIT_LEVEL_C))
+                return -EINVAL;
+        
+        TRACE_TASK(tsk, "mc2_task_client_init: crit_level = %d\n", mc2_param->crit);
+        
+        return 0;
+}
+
+asmlinkage long sys_set_mc2_task_param(pid_t pid, struct mc2_task __user * param)
+{
+        struct task_struct *target;
+        int retval = -EINVAL;
+        struct mc2_task *mp = kzalloc(sizeof(*mp), GFP_KERNEL);
+        
+        if (!mp)
+                return -ENOMEM;
+
+        printk("Setting up mc^2 task parameters for process %d.\n", pid);
+
+        if (pid < 0 || param == 0) {
+                goto out;
+        }
+        if (copy_from_user(mp, param, sizeof(*mp))) {
+                retval = -EFAULT;
+                goto out;
+        }
+
+        /* Task search and manipulation must be protected */
+        read_lock_irq(&tasklist_lock);
+        if (!(target = find_task_by_vpid(pid))) {
+                retval = -ESRCH;
+                goto out_unlock;
+        }
+
+        if (is_realtime(target)) {
+                /* The task is already a real-time task.
+                 * We cannot not allow parameter changes at this point.
+                 */
+                retval = -EBUSY;
+                goto out_unlock;
+        }
+        if (mp->crit < CRIT_LEVEL_A || mp->crit >= NUM_CRIT_LEVELS) {
+                printk(KERN_INFO "litmus: real-time task %d rejected "
+                        "because of invalid criticality level\n", pid);
+                goto out_unlock;
+        }
+        
+        //target->rt_param.plugin_state = mp;
+        target->rt_param.mc2_data = mp;
+
+        retval = 0;
+out_unlock:
+        read_unlock_irq(&tasklist_lock);
+out:
+        return retval;
+}
\ No newline at end of file