From: Joerg Roedel <[email protected]> A device that might be used for HSA needs to be in a direct mapped domain so that all DMA-API mappings stay alive when the IOMMUv2 stack is used.
Signed-off-by: Joerg Roedel <[email protected]> --- drivers/iommu/amd_iommu.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 33bbb4d..8682786 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2253,6 +2253,8 @@ static void detach_device(struct device *dev) static int amd_iommu_add_device(struct device *dev) { + struct iommu_dev_data *dev_data; + struct iommu_domain *domain; struct amd_iommu *iommu; u16 devid; int ret; @@ -2270,7 +2272,18 @@ static int amd_iommu_add_device(struct device *dev) } init_iommu_group(dev); - dev->archdata.dma_ops = &amd_iommu_dma_ops; + dev_data = get_dev_data(dev); + if (dev_data && dev_data->iommu_v2) + iommu_request_dm_for_dev(dev); + + /* Domains are initialized for this device - have a look what we ended up with */ + domain = iommu_get_domain_for_dev(dev); + if (domain->type == IOMMU_DOMAIN_IDENTITY) { + dev_data->passthrough = true; + dev->archdata.dma_ops = &nommu_dma_ops; + } else { + dev->archdata.dma_ops = &amd_iommu_dma_ops; + } out: iommu_completion_wait(iommu); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
