Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5f0a7f76 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/vt-d: Make root entry visible for hardware right after allocation 



In case there was an old root entry, make our new one
visible immediately after it was allocated.

Tested-by: default avatarZhenHua Li <zhen-hual@hp.com>
Tested-by: default avatarBaoquan He <bhe@redhat.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent b63d80d1

drivers/iommu/intel-iommu.c

+6 −4
Original line number Diff line number Diff line
@@ -2817,6 +2817,12 @@ static int __init init_dmars(void) 
		ret = iommu_alloc_root_entry(iommu);

		if (ret)

			goto free_iommu;



		iommu_flush_write_buffer(iommu);

		iommu_set_root_entry(iommu);

		iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL);

		iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);



		if (!ecap_pass_through(iommu->ecap))

			hw_pass_through = 0;

	}
@@ -2893,10 +2899,6 @@ static int __init init_dmars(void) 
		if (ret)

			goto free_iommu;



		iommu_set_root_entry(iommu);



		iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL);

		iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);

		iommu_enable_translation(iommu);

		iommu_disable_protect_mem_regions(iommu);

	}