From: Joerg Roedel <jroedel@xxxxxxx>
The page-mode 7 is a special one as it marks a final PTE to
a page with an intermediary size.
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
---
drivers/iommu/amd_iommu.c | 4 ++++
drivers/iommu/amd_iommu_types.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 1186571f77e1..49b5d3115e56 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1372,6 +1372,7 @@ static struct page *free_sub_pt(unsigned long root, int mode,
{
switch (mode) {
case PAGE_MODE_NONE:
+ case PAGE_MODE_7_LEVEL:
break;
case PAGE_MODE_1_LEVEL:
freelist = free_pt_page(root, freelist);
@@ -1403,6 +1404,9 @@ static void free_pagetable(struct protection_domain *domain)
unsigned long root = (unsigned long)domain->pt_root;
struct page *freelist = NULL;
+ BUG_ON(domain->mode < PAGE_MODE_NONE ||
+ domain->mode > PAGE_MODE_6_LEVEL);
+
free_sub_pt(root, domain->mode, freelist);
free_page_list(freelist);
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index e2b342e65a7b..eae0741f72dc 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -269,6 +269,7 @@
#define PAGE_MODE_4_LEVEL 0x04
#define PAGE_MODE_5_LEVEL 0x05
#define PAGE_MODE_6_LEVEL 0x06
+#define PAGE_MODE_7_LEVEL 0x07
#define PM_LEVEL_SHIFT(x) (12 + ((x) * 9))
#define PM_LEVEL_SIZE(x) (((x) < 6) ? \
--
2.17.1
