On Tue, Feb 04, 2025 at 04:49:47PM -0400, Jason Gunthorpe wrote: > The phys_to_virt() I mean is on the page table pages themselves, not > on a leaf. > > All page table pages came from alloc_pages_node() and you'd do > virt_to_phys() to stick them into a next-table PTE, then > phys_to_virt() to bring them back: > > phys_to_virt(virt_to_phys(page_address(alloc_pages_node()))) > > Effectively. except for s390 & ppc where the page table can be smaller than PAGE_SIZE, so you really only have a physical address that can be converted to a virtual address.
