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authorJoerg Roedel <joro@8bytes.org>2013-01-29 12:49:04 (GMT)
committerJoerg Roedel <joro@8bytes.org>2013-02-06 09:47:11 (GMT)
commitd2e121601619631517409cba34e50db3cbff5852 (patch)
tree31f5362774bb8e25e9ff2515386156726feb642f /drivers/iommu
parent57886518a8cdd319a04f5ea06a5f7ffcb8a93120 (diff)
downloadlinux-d2e121601619631517409cba34e50db3cbff5852.tar.xz
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: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/iommu.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 4e6d6f8..0e0e5f2 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -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) {
@@ -877,6 +878,10 @@ int iommu_domain_get_attr(struct iommu_domain *domain,
*geometry = domain->geometry;
break;
+ case DOMAIN_ATTR_PAGING:
+ paging = data;
+ *paging = (domain->ops->pgsize_bitmap != 0UL);
+ break;
default:
if (!domain->ops->domain_get_attr)
return -EINVAL;