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authorMark Nutter <mnutter@us.ibm.com>2006-10-24 18:31:16 +0200
committerPaul Mackerras <paulus@samba.org>2006-10-25 14:20:21 +1000
commit5737edd1ddbde5ab7f63bb3cb36015edbdb7c295 (patch)
tree10162eb7c27fa0a3d1614c2d46fdcf2c87410d3a /arch/powerpc/platforms/cell/spufs/inode.c
parentcc21a66d7f727ab97b27af9cf763bc0b51510ffa (diff)
downloadop-kernel-dev-5737edd1ddbde5ab7f63bb3cb36015edbdb7c295.zip
op-kernel-dev-5737edd1ddbde5ab7f63bb3cb36015edbdb7c295.tar.gz
[POWERPC] spufs: add support for nonschedulable contexts
This adds two new flags to spu_create: SPU_CREATE_NONSCHED: create a context that is never moved away from an SPE once it has started running. This flag can only be used by tasks with the CAP_SYS_NICE capability. SPU_CREATE_ISOLATED: create a nonschedulable context that enters isolation mode upon first run. This requires the SPU_CREATE_NONSCHED flag. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/inode.c')
-rw-r--r--arch/powerpc/platforms/cell/spufs/inode.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 427d00a..787ae71 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -258,7 +258,12 @@ spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags,
inode->i_op = &spufs_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
- ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
+ if (flags & SPU_CREATE_NOSCHED)
+ ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents,
+ mode, ctx);
+ else
+ ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
+
if (ret)
goto out_free_ctx;
@@ -307,6 +312,16 @@ static int spufs_create_context(struct inode *inode,
{
int ret;
+ ret = -EPERM;
+ if ((flags & SPU_CREATE_NOSCHED) &&
+ !capable(CAP_SYS_NICE))
+ goto out_unlock;
+
+ ret = -EINVAL;
+ if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE))
+ == SPU_CREATE_ISOLATE)
+ goto out_unlock;
+
ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO);
if (ret)
goto out_unlock;
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