Commit d2e12160 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu: Implement DOMAIN_ATTR_PAGING attribute 



This attribute of a domain can be queried to find out if the
domain supports setting up page-tables using the iommu_map()
and iommu_unmap() functions.

Signed-off-by: default avatarJoerg Roedel <joro@8bytes.org>
parent 57886518

drivers/iommu/iommu.c

+5 −0
Original line number Diff line number Diff line
@@ -869,6 +869,7 @@ int iommu_domain_get_attr(struct iommu_domain *domain, 
			  enum iommu_attr attr, void *data)

{

	struct iommu_domain_geometry *geometry;

	bool *paging;

	int ret = 0;



	switch (attr) {
@@ -876,6 +877,10 @@ int iommu_domain_get_attr(struct iommu_domain *domain, 
		geometry  = data;

		*geometry = domain->geometry;



		break;

	case DOMAIN_ATTR_PAGING:

		paging  = data;

		*paging = (domain->ops->pgsize_bitmap != 0UL);

		break;

	default:

		if (!domain->ops->domain_get_attr)

include/linux/iommu.h

+1 −0
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ struct iommu_domain { 


enum iommu_attr {

	DOMAIN_ATTR_GEOMETRY,

	DOMAIN_ATTR_PAGING,

	DOMAIN_ATTR_MAX,

};