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| author |   Luke Browning <lukebr@linux.vnet.ibm.com> | 2008-04-28 17:35:56 +1000 |
|---|---|---|
| committer |   Jeremy Kerr <jk@ozlabs.org> | 2008-05-05 13:33:44 +1000 |
| commit | de1028927ae3487e2e450dacf50fbf32042aee18 (patch) | |
| tree | 615b7c5fa3526ccf11b63be88c8978180df0bee8 /arch/powerpc/platforms/cell/spu_base.c | |
| parent | [POWERPC] spufs: fix concurrent delivery of class 0 & 1 exceptions (diff) | |
| download | linux-dev-de1028927ae3487e2e450dacf50fbf32042aee18.tar.xz linux-dev-de1028927ae3487e2e450dacf50fbf32042aee18.zip | |
[POWERPC] spufs: handle faults while the context switch pending flag is set
Currently, page fault handlers don't issue a mfc restart if the context
switch pending flag is set, which can leave us with a hanging DMA after
a context restore.
This patch introduces fault pending flag that is set by the fault
handler and read by the context switch code, so that the latter can add
the restart bit at the right spot, after it has successfuly saved the
state of the mfc control register.
Signed-off-by: Luke Browning <lukebr@linux.vnet.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spu_base.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spu_base.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c index b9ae675640d0..70c660121ec4 100644 --- a/arch/powerpc/platforms/cell/spu_base.c +++ b/arch/powerpc/platforms/cell/spu_base.c @@ -141,6 +141,10 @@ static void spu_restart_dma(struct spu *spu) if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags)) out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); + else { + set_bit(SPU_CONTEXT_FAULT_PENDING, &spu->flags); + mb(); + } } static inline void spu_load_slb(struct spu *spu, int slbe, struct spu_slb *slb) |