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| author | Mark Nutter <mnutter@us.ibm.com> | 2006-10-24 18:31:16 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-10-25 14:20:21 +1000 |
| commit | 5737edd1ddbde5ab7f63bb3cb36015edbdb7c295 (patch) | |
| tree | 10162eb7c27fa0a3d1614c2d46fdcf2c87410d3a /arch/powerpc/platforms/cell/spufs/inode.c | |
| parent | cc21a66d7f727ab97b27af9cf763bc0b51510ffa (diff) | |
| download | op-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.c | 17 |
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; |
