iommu/amd: Do not set the D bit on AMD v2 table entries

The manual says that bit 6 is IGN for all Page-Table Base Address
pointers, don't set it.

Fixes: aaac38f ("iommu/amd: Initial support for AMD IOMMU v2 page table")
Reviewed-by: Vasant Hegde <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>

drivers/iommu/amd/io_pgtable_v2.c

@@ -51,7 +51,7 @@ static inline u64 set_pgtable_attr(u64 *page)
 	u64 prot;
 
 	prot = IOMMU_PAGE_PRESENT | IOMMU_PAGE_RW | IOMMU_PAGE_USER;
-	prot |= IOMMU_PAGE_ACCESS | IOMMU_PAGE_DIRTY;
+	prot |= IOMMU_PAGE_ACCESS;
 
 	return (iommu_virt_to_phys(page) | prot);
 }