Commit 863c74eb authored by Joerg Roedel's avatar Joerg Roedel

AMD IOMMU: add device reference counting for protection domains

Impact: know how many devices are assigned to a domain
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 5b28df6f
......@@ -203,6 +203,7 @@ struct protection_domain {
int mode; /* paging mode (0-6 levels) */
u64 *pt_root; /* page table root pointer */
unsigned long flags; /* flags to find out type of domain */
unsigned dev_cnt; /* devices assigned to this domain */
void *priv; /* private data */
};
......
......@@ -825,9 +825,10 @@ static void set_device_domain(struct amd_iommu *iommu,
u16 devid)
{
unsigned long flags;
u64 pte_root = virt_to_phys(domain->pt_root);
domain->dev_cnt += 1;
pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK)
<< DEV_ENTRY_MODE_SHIFT;
pte_root |= IOMMU_PTE_IR | IOMMU_PTE_IW | IOMMU_PTE_P | IOMMU_PTE_TV;
......
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