diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/spu_base.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spu_base.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c index 9e9096590a0..44492d87cdf 100644 --- a/arch/powerpc/platforms/cell/spu_base.c +++ b/arch/powerpc/platforms/cell/spu_base.c @@ -62,7 +62,9 @@ static int __spu_trap_error(struct spu *spu) static void spu_restart_dma(struct spu *spu) { struct spu_priv2 __iomem *priv2 = spu->priv2; - out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); + + if (!test_bit(SPU_CONTEXT_SWITCH_PENDING_nr, &spu->flags)) + out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); } static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) @@ -72,6 +74,11 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) pr_debug("%s\n", __FUNCTION__); + if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE_nr, &spu->flags)) { + printk("%s: invalid access during switch!\n", __func__); + return 1; + } + if (REGION_ID(ea) != USER_REGION_ID) { pr_debug("invalid region access at %016lx\n", ea); return 1; @@ -98,6 +105,7 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) return 0; } +extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX static int __spu_trap_data_map(struct spu *spu, unsigned long ea) { unsigned long dsisr; @@ -107,8 +115,21 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea) priv1 = spu->priv1; dsisr = in_be64(&priv1->mfc_dsisr_RW); - wake_up(&spu->stop_wq); + /* Handle kernel space hash faults immediately. + User hash faults need to be deferred to process context. */ + if ((dsisr & MFC_DSISR_PTE_NOT_FOUND) + && REGION_ID(ea) != USER_REGION_ID + && hash_page(ea, _PAGE_PRESENT, 0x300) == 0) { + spu_restart_dma(spu); + return 0; + } + + if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE_nr, &spu->flags)) { + printk("%s: invalid access during switch!\n", __func__); + return 1; + } + wake_up(&spu->stop_wq); return 0; } @@ -382,7 +403,6 @@ void spu_free(struct spu *spu) } EXPORT_SYMBOL(spu_free); -extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX static int spu_handle_mm_fault(struct spu *spu) { struct spu_priv1 __iomem *priv1; @@ -650,6 +670,7 @@ static int __init create_spu(struct device_node *spe) spu->slb_replace = 0; spu->mm = NULL; spu->class_0_pending = 0; + spu->flags = 0UL; spin_lock_init(&spu->register_lock); out_be64(&spu->priv1->mfc_sdr_RW, mfspr(SPRN_SDR1)); |