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[POWERPC] spufs: add support for nonschedulable contexts

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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>
This commit is contained in:
Mark Nutter 2006-10-24 18:31:16 +02:00 • committed by Paul Mackerras
commit 5737edd1dd
7 changed files with 103 additions and 7 deletions
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5
include/asm-powerpc/spu.h
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@ -181,8 +181,10 @@ extern struct spufs_calls {
*/
#define SPU_CREATE_EVENTS_ENABLED 0x0001
#define SPU_CREATE_GANG 0x0002
#define SPU_CREATE_NOSCHED 0x0004
#define SPU_CREATE_ISOLATE 0x0008
#define SPU_CREATE_FLAG_ALL 0x0003 /* mask of all valid flags */
#define SPU_CREATE_FLAG_ALL 0x000f /* mask of all valid flags */
#ifdef CONFIG_SPU_FS_MODULE
@ -276,6 +278,7 @@ struct spu_problem {
u32 spu_runcntl_RW; /* 0x401c */
#define SPU_RUNCNTL_STOP 0L
#define SPU_RUNCNTL_RUNNABLE 1L
#define SPU_RUNCNTL_ISOLATE 2L
u8 pad_0x4020_0x4024[0x4]; /* 0x4020 */
u32 spu_status_R; /* 0x4024 */
#define SPU_STOP_STATUS_SHIFT 16