[POWERPC] spufs: fix concurrent delivery of class 0 & 1 exceptions

SPU class 0 & 1 exceptions may occur in parallel, so we may end up
overwriting csa.dsisr.

This change adds dedicated fields for each class to the spu and the spu
context so that fault data is not overwritten.

Signed-off-by: Luke Browning <lukebr@linux.vnet.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 18 insertions, 9 deletions

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 6bab44b7716..b9ae675640d 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -226,11 +226,13 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
                 return 0;
         }
 
-        spu->class_0_pending = 0;
-        spu->dar = ea;
-        spu->dsisr = dsisr;
+        spu->class_1_dar = ea;
+        spu->class_1_dsisr = dsisr;
+
+        spu->stop_callback(spu, 1);
 
-        spu->stop_callback(spu);
+        spu->class_1_dar = 0;
+        spu->class_1_dsisr = 0;
 
         return 0;
 }
@@ -318,11 +320,15 @@ spu_irq_class_0(int irq, void *data)
         stat = spu_int_stat_get(spu, 0) & mask;
 
         spu->class_0_pending |= stat;
-        spu->dsisr = spu_mfc_dsisr_get(spu);
-        spu->dar = spu_mfc_dar_get(spu);
+        spu->class_0_dsisr = spu_mfc_dsisr_get(spu);
+        spu->class_0_dar = spu_mfc_dar_get(spu);
         spin_unlock(&spu->register_lock);
 
-        spu->stop_callback(spu);
+        spu->stop_callback(spu, 0);
+
+        spu->class_0_pending = 0;
+        spu->class_0_dsisr = 0;
+        spu->class_0_dar = 0;
 
         spu_int_stat_clear(spu, 0, stat);
 
@@ -363,6 +369,9 @@ spu_irq_class_1(int irq, void *data)
         if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_PUT_INTR)
                 ;
 
+        spu->class_1_dsisr = 0;
+        spu->class_1_dar = 0;
+
         return stat ? IRQ_HANDLED : IRQ_NONE;
 }
 
@@ -396,10 +405,10 @@ spu_irq_class_2(int irq, void *data)
                 spu->ibox_callback(spu);
 
         if (stat & CLASS2_SPU_STOP_INTR)
-                spu->stop_callback(spu);
+                spu->stop_callback(spu, 2);
 
         if (stat & CLASS2_SPU_HALT_INTR)
-                spu->stop_callback(spu);
+                spu->stop_callback(spu, 2);
 
         if (stat & CLASS2_SPU_DMA_TAG_GROUP_COMPLETE_INTR)
                 spu->mfc_callback(spu);