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| author | Joerg Roedel <joro@8bytes.org> | 2013-01-29 13:49:04 +0100 |
|---|---|---|
| committer | Joerg Roedel <joro@8bytes.org> | 2013-02-06 10:47:11 +0100 |
| commit | d2e121601619631517409cba34e50db3cbff5852 (patch) | |
| tree | 31f5362774bb8e25e9ff2515386156726feb642f | |
| parent | 57886518a8cdd319a04f5ea06a5f7ffcb8a93120 (diff) | |
| download | linux-d2e121601619631517409cba34e50db3cbff5852.tar.bz2 | |
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>
| -rw-r--r-- | drivers/iommu/iommu.c | 5 | ||||
| -rw-r--r-- | include/linux/iommu.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 4e6d6f857e6f..0e0e5f2e0ccc 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; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 7e6ce7260b1c..26066f54a849 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -59,6 +59,7 @@ struct iommu_domain { enum iommu_attr { DOMAIN_ATTR_GEOMETRY, + DOMAIN_ATTR_PAGING, DOMAIN_ATTR_MAX, }; |