diff options
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 1bb59ae..4c9063a 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3385,6 +3385,20 @@ static void amd_iommu_put_dm_regions(struct device *dev, kfree(entry); } +static void amd_iommu_apply_dm_region(struct device *dev, + struct iommu_domain *domain, + struct iommu_dm_region *region) +{ + struct protection_domain *pdomain = to_pdomain(domain); + struct dma_ops_domain *dma_dom = pdomain->priv; + unsigned long start, end; + + start = IOVA_PFN(region->start); + end = IOVA_PFN(region->start + region->length); + + WARN_ON_ONCE(reserve_iova(&dma_dom->iovad, start, end) == NULL); +} + static const struct iommu_ops amd_iommu_ops = { .capable = amd_iommu_capable, .domain_alloc = amd_iommu_domain_alloc, @@ -3400,6 +3414,7 @@ static const struct iommu_ops amd_iommu_ops = { .device_group = amd_iommu_device_group, .get_dm_regions = amd_iommu_get_dm_regions, .put_dm_regions = amd_iommu_put_dm_regions, + .apply_dm_region = amd_iommu_apply_dm_region, .pgsize_bitmap = AMD_IOMMU_PGSIZES, }; |