aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-powerpc/spu_csa.h
diff options
context:
space:
mode:
authorArnd Bergmann <arnd.bergmann@de.ibm.com>2007-04-23 15:08:15 -0400
committerArnd Bergmann <arnd@klappe.arndb.de>2007-04-23 15:18:55 -0400
commit57dace2391ba10135e38457904121e7ef34d0c83 (patch)
tree1be720be47bd6f1d929e9242b8a89a8f2e5fe61d /include/asm-powerpc/spu_csa.h
parent62c05d583ec016c40011462d5f03b072bfbd3dc7 (diff)
[POWERPC] spufs: make spu page faults not block scheduling
Until now, we have always entered the spu page fault handler with a mutex for the spu context held. This has multiple bad side-effects: - it becomes impossible to suspend the context during page faults - if an spu program attempts to access its own mmio areas through DMA, we get an immediate livelock when the nopage function tries to acquire the same mutex This patch makes the page fault logic operate on a struct spu_context instead of a struct spu, and moves it from spu_base.c to a new file fault.c inside of spufs. We now also need to copy the dar and dsisr contents of the last fault into the saved context to have it accessible in case we schedule out the context before activating the page fault handler. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Diffstat (limited to 'include/asm-powerpc/spu_csa.h')
-rw-r--r--include/asm-powerpc/spu_csa.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-powerpc/spu_csa.h b/include/asm-powerpc/spu_csa.h
index 8aad0619eb8e..02e56a6685a2 100644
--- a/include/asm-powerpc/spu_csa.h
+++ b/include/asm-powerpc/spu_csa.h
@@ -242,6 +242,7 @@ struct spu_state {
242 u64 spu_chnldata_RW[32]; 242 u64 spu_chnldata_RW[32];
243 u32 spu_mailbox_data[4]; 243 u32 spu_mailbox_data[4];
244 u32 pu_mailbox_data[1]; 244 u32 pu_mailbox_data[1];
245 u64 dar, dsisr;
245 unsigned long suspend_time; 246 unsigned long suspend_time;
246 spinlock_t register_lock; 247 spinlock_t register_lock;
247}; 248};