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[CELL] spufs: extension of spu_create to support affinity definition

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This patch adds support for additional flags at spu_create, which relate
to the establishment of affinity between contexts and contexts to memory.
A fourth, optional, parameter is supported. This parameter represent
a affinity neighbor of the context being created, and is used when defining
SPU-SPU affinity.
Affinity is represented as a doubly linked list of spu_contexts.

Signed-off-by: Andre Detsch <adetsch@br.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Arnd Bergmann
2007-07-20 21:39:47 +02:00
committed by Arnd Bergmann
parent 3ad216cae8
commit 8e68e2f248
8 changed files with 195 additions and 17 deletions
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arch/powerpc/platforms/cell/spu_syscalls.c
+15 -2
View File
@@ -34,14 +34,27 @@ struct spufs_calls spufs_calls = {
* this file is not used and the syscalls directly enter the fs code */
asmlinkage long sys_spu_create(const char __user *name,
unsigned int flags, mode_t mode)
unsigned int flags, mode_t mode, int neighbor_fd)
{
long ret;
struct module *owner = spufs_calls.owner;
struct file *neighbor;
int fput_needed;
ret = -ENOSYS;
if (owner && try_module_get(owner)) {
ret = spufs_calls.create_thread(name, flags, mode);
if (flags & SPU_CREATE_AFFINITY_SPU) {
neighbor = fget_light(neighbor_fd, &fput_needed);
if (neighbor) {
ret = spufs_calls.create_thread(name, flags,
mode, neighbor);
fput_light(neighbor, fput_needed);
}
}
else {
ret = spufs_calls.create_thread(name, flags,
mode, NULL);
}
module_put(owner);
}
return ret;