diff options
| -rw-r--r-- | drivers/pci/intr_remapping.c | 15 | ||||
| -rw-r--r-- | include/linux/intel-iommu.h | 2 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c index c26633d7e7d..ef25caade54 100644 --- a/drivers/pci/intr_remapping.c +++ b/drivers/pci/intr_remapping.c @@ -415,12 +415,27 @@ static void iommu_set_intr_remapping(struct intel_iommu *iommu, int mode) /* Set interrupt-remapping table pointer */ cmd = iommu->gcmd | DMA_GCMD_SIRTP; + iommu->gcmd |= DMA_GCMD_SIRTP; writel(cmd, iommu->reg + DMAR_GCMD_REG); IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (sts & DMA_GSTS_IRTPS), sts); spin_unlock_irqrestore(&iommu->register_lock, flags); + if (mode == 0) { + spin_lock_irqsave(&iommu->register_lock, flags); + + /* enable comaptiblity format interrupt pass through */ + cmd = iommu->gcmd | DMA_GCMD_CFI; + iommu->gcmd |= DMA_GCMD_CFI; + writel(cmd, iommu->reg + DMAR_GCMD_REG); + + IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, + readl, (sts & DMA_GSTS_CFIS), sts); + + spin_unlock_irqrestore(&iommu->register_lock, flags); + } + /* * global invalidation of interrupt entry cache before enabling * interrupt-remapping. diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 3771cd1f876..aa8c5317123 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -164,6 +164,7 @@ static inline void dmar_writeq(void __iomem *addr, u64 val) #define DMA_GCMD_QIE (((u32)1) << 26) #define DMA_GCMD_SIRTP (((u32)1) << 24) #define DMA_GCMD_IRE (((u32) 1) << 25) +#define DMA_GCMD_CFI (((u32) 1) << 23) /* GSTS_REG */ #define DMA_GSTS_TES (((u32)1) << 31) @@ -174,6 +175,7 @@ static inline void dmar_writeq(void __iomem *addr, u64 val) #define DMA_GSTS_QIES (((u32)1) << 26) #define DMA_GSTS_IRTPS (((u32)1) << 24) #define DMA_GSTS_IRES (((u32)1) << 25) +#define DMA_GSTS_CFIS (((u32)1) << 23) /* CCMD_REG */ #define DMA_CCMD_ICC (((u64)1) << 63) |