This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-devel] Re: x86_64 SMP support (status update)

* Keir Fraser (Keir.Fraser@xxxxxxxxxxxx) wrote:
> Xen makes a shadow mapping of the per-vcpu gdt in its own address 
> space. This, coupled with Xen reserving the last 2 pages of GDT entries 
> for itself, requires every GDT to start on a page boundary. So, even 
> though per-cpu gdts are not page-aligned they must be at least one page 
> in size.

ah, thanks!  i should've realized that.  at one point i moved the
cpu_gdt_table, and it was no longer page aligned (nor was it a page long)
and vcpu 0 wouldn't come up any longer.  making sure it was aligned
and on it's own page got the first cpu going again...didn't think to
generalize that ;-)


Xen-devel mailing list