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Commit 80be308d authored by Joerg Roedel's avatar Joerg Roedel
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AMD IOMMU: fix lazy IO/TLB flushing in unmap path 



Lazy flushing needs to take care of the unmap path too which is not yet
implemented and leads to stale IO/TLB entries. This is fixed by this
patch.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent ae9b9403

arch/x86/kernel/amd_iommu.c

+6 −1
Original line number Diff line number Diff line
@@ -526,6 +526,9 @@ static void dma_ops_free_addresses(struct dma_ops_domain *dom, 
{

	address >>= PAGE_SHIFT;

	iommu_area_free(dom->bitmap, address, pages);



	if (address + pages >= dom->next_bit)

		dom->need_flush = true;

}



/****************************************************************************
@@ -981,8 +984,10 @@ static void __unmap_single(struct amd_iommu *iommu, 


	dma_ops_free_addresses(dma_dom, dma_addr, pages);



	if (amd_iommu_unmap_flush)

	if (amd_iommu_unmap_flush || dma_dom->need_flush) {

		iommu_flush_pages(iommu, dma_dom->domain.id, dma_addr, size);

		dma_dom->need_flush = false;

	}

}



/*