>>> On 19.01.17 at 12:37, <daniel.ki...@oracle.com> wrote: > On Thu, Jan 19, 2017 at 02:09:37AM -0700, Jan Beulich wrote: >> >>> On 18.01.17 at 20:51, <andrew.coop...@citrix.com> wrote: >> > Are we strictly guaranteed to have the entire image, including multiboot >> > tags, loaded below 4GB virtual even in the 64bit case? Even on non-EFI >> > capable grub2's ? >> >> I can't speak for GrUB, but I've recently learned that EFI alone >> doesn't appear to make such guarantees, and also doesn't look >> to have ways to request such address restricted loading of an > > Why? Due to lack of memory below 4 GiB, it being reserved for > something, EFI implementation bugs or anything else?
I don't know the precise reason in that specific case, but I did go through the spec again after I had read that report, and I wasn't able to find anything regarding mandated or optional address restrictions. My recollection of there being such a restriction must have been based on the EFI sample implementation and/or the EDK. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
