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authorArnd Bergmann <arnd.bergmann@de.ibm.com>2007-04-23 21:08:15 +0200
committerArnd Bergmann <arnd@klappe.arndb.de>2007-04-23 21:18:55 +0200
commit57dace2391ba10135e38457904121e7ef34d0c83 (patch)
tree1be720be47bd6f1d929e9242b8a89a8f2e5fe61d /include/asm-powerpc
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')
-rw-r--r--include/asm-powerpc/mmu.h1
-rw-r--r--include/asm-powerpc/spu_csa.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-powerpc/mmu.h b/include/asm-powerpc/mmu.h
index 200055a4b82..e22fd881150 100644
--- a/include/asm-powerpc/mmu.h
+++ b/include/asm-powerpc/mmu.h
@@ -234,6 +234,7 @@ extern int __hash_page_64K(unsigned long ea, unsigned long access,
unsigned long vsid, pte_t *ptep, unsigned long trap,
unsigned int local);
struct mm_struct;
+extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap);
extern int hash_huge_page(struct mm_struct *mm, unsigned long access,
unsigned long ea, unsigned long vsid, int local,
unsigned long trap);
diff --git a/include/asm-powerpc/spu_csa.h b/include/asm-powerpc/spu_csa.h
index 8aad0619eb8..02e56a6685a 100644
--- a/include/asm-powerpc/spu_csa.h
+++ b/include/asm-powerpc/spu_csa.h
@@ -242,6 +242,7 @@ struct spu_state {
u64 spu_chnldata_RW[32];
u32 spu_mailbox_data[4];
u32 pu_mailbox_data[1];
+ u64 dar, dsisr;
unsigned long suspend_time;
spinlock_t register_lock;
};