Commit eb5ecd1a authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Joerg Roedel
Browse files

iommu/amd: Add support for fast IOTLB flushing 



Since AMD IOMMU driver currently flushes all TLB entries
when page size is more than one, use the same interface
for both iommu_ops.flush_iotlb_all() and iommu_ops.iotlb_sync().

Cc: Joerg Roedel <joro@8bytes.org>
Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent df42a04b

drivers/iommu/amd_iommu.c

+16 −3
Original line number Diff line number Diff line
@@ -3056,9 +3056,6 @@ static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, 
	unmap_size = iommu_unmap_page(domain, iova, page_size);

	mutex_unlock(&domain->api_lock);



	domain_flush_tlb_pde(domain);

	domain_flush_complete(domain);



	return unmap_size;

}
@@ -3176,6 +3173,19 @@ static bool amd_iommu_is_attach_deferred(struct iommu_domain *domain, 
	return dev_data->defer_attach;

}



static void amd_iommu_flush_iotlb_all(struct iommu_domain *domain)

{

	struct protection_domain *dom = to_pdomain(domain);



	domain_flush_tlb_pde(dom);

	domain_flush_complete(dom);

}



static void amd_iommu_iotlb_range_add(struct iommu_domain *domain,

				      unsigned long iova, size_t size)

{

}



const struct iommu_ops amd_iommu_ops = {

	.capable = amd_iommu_capable,

	.domain_alloc = amd_iommu_domain_alloc,
@@ -3194,6 +3204,9 @@ const struct iommu_ops amd_iommu_ops = { 
	.apply_resv_region = amd_iommu_apply_resv_region,

	.is_attach_deferred = amd_iommu_is_attach_deferred,

	.pgsize_bitmap	= AMD_IOMMU_PGSIZES,

	.flush_iotlb_all = amd_iommu_flush_iotlb_all,

	.iotlb_range_add = amd_iommu_iotlb_range_add,

	.iotlb_sync = amd_iommu_flush_iotlb_all,

};



/*****************************************************************************

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