aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/cell/spufs/inode.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/inode.c')
-rw-r--r--arch/powerpc/platforms/cell/spufs/inode.c58
1 files changed, 55 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 427d00a4f6a..c7d010749a1 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -33,7 +33,7 @@
33#include <linux/slab.h> 33#include <linux/slab.h>
34#include <linux/parser.h> 34#include <linux/parser.h>
35 35
36#include <asm/io.h> 36#include <asm/prom.h>
37#include <asm/semaphore.h> 37#include <asm/semaphore.h>
38#include <asm/spu.h> 38#include <asm/spu.h>
39#include <asm/uaccess.h> 39#include <asm/uaccess.h>
@@ -41,6 +41,7 @@
41#include "spufs.h" 41#include "spufs.h"
42 42
43static kmem_cache_t *spufs_inode_cache; 43static kmem_cache_t *spufs_inode_cache;
44char *isolated_loader;
44 45
45static struct inode * 46static struct inode *
46spufs_alloc_inode(struct super_block *sb) 47spufs_alloc_inode(struct super_block *sb)
@@ -231,6 +232,7 @@ struct file_operations spufs_context_fops = {
231 .readdir = dcache_readdir, 232 .readdir = dcache_readdir,
232 .fsync = simple_sync_file, 233 .fsync = simple_sync_file,
233}; 234};
235EXPORT_SYMBOL_GPL(spufs_context_fops);
234 236
235static int 237static int
236spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 238spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags,
@@ -255,10 +257,14 @@ spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags,
255 goto out_iput; 257 goto out_iput;
256 258
257 ctx->flags = flags; 259 ctx->flags = flags;
258
259 inode->i_op = &spufs_dir_inode_operations; 260 inode->i_op = &spufs_dir_inode_operations;
260 inode->i_fop = &simple_dir_operations; 261 inode->i_fop = &simple_dir_operations;
261 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 262 if (flags & SPU_CREATE_NOSCHED)
263 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents,
264 mode, ctx);
265 else
266 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
267
262 if (ret) 268 if (ret)
263 goto out_free_ctx; 269 goto out_free_ctx;
264 270
@@ -307,6 +313,20 @@ static int spufs_create_context(struct inode *inode,
307{ 313{
308 int ret; 314 int ret;
309 315
316 ret = -EPERM;
317 if ((flags & SPU_CREATE_NOSCHED) &&
318 !capable(CAP_SYS_NICE))
319 goto out_unlock;
320
321 ret = -EINVAL;
322 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE))
323 == SPU_CREATE_ISOLATE)
324 goto out_unlock;
325
326 ret = -ENODEV;
327 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader)
328 goto out_unlock;
329
310 ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); 330 ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO);
311 if (ret) 331 if (ret)
312 goto out_unlock; 332 goto out_unlock;
@@ -540,6 +560,30 @@ spufs_parse_options(char *options, struct inode *root)
540 return 1; 560 return 1;
541} 561}
542 562
563static void
564spufs_init_isolated_loader(void)
565{
566 struct device_node *dn;
567 const char *loader;
568 int size;
569
570 dn = of_find_node_by_path("/spu-isolation");
571 if (!dn)
572 return;
573
574 loader = get_property(dn, "loader", &size);
575 if (!loader)
576 return;
577
578 /* kmalloc should align on a 16 byte boundary..* */
579 isolated_loader = kmalloc(size, GFP_KERNEL);
580 if (!isolated_loader)
581 return;
582
583 memcpy(isolated_loader, loader, size);
584 printk(KERN_INFO "spufs: SPU isolation mode enabled\n");
585}
586
543static int 587static int
544spufs_create_root(struct super_block *sb, void *data) 588spufs_create_root(struct super_block *sb, void *data)
545{ 589{
@@ -608,6 +652,7 @@ static struct file_system_type spufs_type = {
608static int __init spufs_init(void) 652static int __init spufs_init(void)
609{ 653{
610 int ret; 654 int ret;
655
611 ret = -ENOMEM; 656 ret = -ENOMEM;
612 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 657 spufs_inode_cache = kmem_cache_create("spufs_inode_cache",
613 sizeof(struct spufs_inode_info), 0, 658 sizeof(struct spufs_inode_info), 0,
@@ -625,6 +670,12 @@ static int __init spufs_init(void)
625 ret = register_spu_syscalls(&spufs_calls); 670 ret = register_spu_syscalls(&spufs_calls);
626 if (ret) 671 if (ret)
627 goto out_fs; 672 goto out_fs;
673 ret = register_arch_coredump_calls(&spufs_coredump_calls);
674 if (ret)
675 goto out_fs;
676
677 spufs_init_isolated_loader();
678
628 return 0; 679 return 0;
629out_fs: 680out_fs:
630 unregister_filesystem(&spufs_type); 681 unregister_filesystem(&spufs_type);
@@ -638,6 +689,7 @@ module_init(spufs_init);
638static void __exit spufs_exit(void) 689static void __exit spufs_exit(void)
639{ 690{
640 spu_sched_exit(); 691 spu_sched_exit();
692 unregister_arch_coredump_calls(&spufs_coredump_calls);
641 unregister_spu_syscalls(&spufs_calls); 693 unregister_spu_syscalls(&spufs_calls);
642 unregister_filesystem(&spufs_type); 694 unregister_filesystem(&spufs_type);
643 kmem_cache_destroy(spufs_inode_cache); 695 kmem_cache_destroy(spufs_inode_cache);