On Tue, Jan 18, 2022 at 01:41:40PM -0800, Dave Hansen wrote: > On 1/18/22 1:19 PM, Khalid Aziz wrote: > > - Starting address must be aligned to pgdir size (512GB on x86_64) > > How does this work on systems with 5-level paging where a top-level page > table entry covers 256TB? Is the alignment requirement 512GB or 256TB? > How does userspace figure out which alignment requirement it is subject to? The original idea was any power of two, naturally aligned, >= PAGE_SIZE, but I suspect Khalid has simplified it for this first implementation.
