1 #include <linux/file.h>
3 #include <linux/export.h>
4 #include <linux/mount.h>
5 #include <linux/namei.h>
6 #include <linux/slab.h>
8 #include <asm/uaccess.h>
13 * sys_spu_run - run code loaded into an SPU
15 * @unpc: next program counter for the SPU
16 * @ustatus: status of the SPU
18 * This system call transfers the control of execution of a
19 * user space thread to an SPU. It will return when the
20 * SPU has finished executing or when it hits an error
21 * condition and it will be interrupted if a signal needs
22 * to be delivered to a handler in user space.
24 * The next program counter is set to the passed value
25 * before the SPU starts fetching code and the user space
26 * pointer gets updated with the new value when returning
29 * The status value returned from spu_run reflects the
30 * value of the spu_status register after the SPU has stopped.
33 static long do_spu_run(struct file *filp,
35 __u32 __user *ustatus)
38 struct spufs_inode_info *i;
42 if (get_user(npc, unpc))
45 /* check if this file was created by spu_create */
47 if (filp->f_op != &spufs_context_fops)
50 i = SPUFS_I(file_inode(filp));
51 ret = spufs_run_spu(i->i_ctx, &npc, &status);
53 if (put_user(npc, unpc))
56 if (ustatus && put_user(status, ustatus))
62 static long do_spu_create(const char __user *pathname, unsigned int flags,
63 umode_t mode, struct file *neighbor)
66 struct dentry *dentry;
69 dentry = user_path_create(AT_FDCWD, pathname, &path, LOOKUP_DIRECTORY);
70 ret = PTR_ERR(dentry);
71 if (!IS_ERR(dentry)) {
72 ret = spufs_create(&path, dentry, flags, mode, neighbor);
73 done_path_create(&path, dentry);
79 struct spufs_calls spufs_calls = {
80 .create_thread = do_spu_create,
81 .spu_run = do_spu_run,
82 .coredump_extra_notes_size = spufs_coredump_extra_notes_size,
83 .coredump_extra_notes_write = spufs_coredump_extra_notes_write,
84 .notify_spus_active = do_notify_spus_active,