Re: [Xen-devel] [PATCH] support 1gb pages in guest page table walker

[Christoph Egger <Christoph.Egger@xxxxxxx>]

On 07/25/11 12:30, Tim Deegan wrote:
> At 11:25 +0100 on 25 Jul (1311593146), Tim Deegan wrote:
> > Also this function should be called from the CPUID trap handler to make
> > sure we never advertise PSE1GB when we're not going to support it.
> Er, not this function exactly, since CPUID should report the feature
> even when the guest's not in long_mode.  I think it needs a
> hvm_pse1G_supported that can be called from CPUID, and then
> guest_supports_1G_superpages() boils down to
> "(GUEST_PAGING_LEVEL>= 4)&&  hvm_pse1G_supported(v)"
New version attached. I removed the fake l1e calculation.
Something is still wrong: The l2 guest kernel crashes with
an unexpected null pointer derefencing but it boots w/o
this patch.

Is it a problem when l1 guest uses 1gb pages where the host
uses 4k or 2m pages?

Christoph


--
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Einsteinring 24, 85689 Dornach b. Muenchen
Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632

Attachment: xen_pagewalk.diff
Description: xen_pagewalk.diff

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel