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Re: [Xen-devel] [PATCH] xen: adjust early dom0 p2m handling to xen hypervisor behavior

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>>> On 10.05.17 at 06:08, <jgross@suse.com> wrote:
> When booted as pv-guest the p2m list presented by the Xen is already
> mapped to virtual addresses. In dom0 case the hypervisor might make use
> of 2M- or 1G-pages for this mapping. Unfortunately while being properly
> aligned in virtual and machine address space, those pages might not be
> aligned properly in guest physical address space.
> 
> So when trying to obtain the guest physical address of such a page
> pud_pfn() and pmd_pfn() must be avoided as those will mask away guest
> physical address bits not being zero in this special case.
> 
> Signed-off-by: Juergen Gross <jgross@suse.com>

Reviewed-by: Jan Beulich <jbeulich@suse.com>

Perhaps worth Cc-ing stable@ ?

Jan

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[PATCH] xen: adjust early dom0 p2m handling to xen hypervisor behavior Juergen Gross <jgross@suse.com> - 2017-05-10 06:10 +0200
  Re: [Xen-devel] [PATCH] xen: adjust early dom0 p2m handling to  xen hypervisor behavior "Jan Beulich" <JBeulich@suse.com> - 2017-05-10 10:10 +0200
    Re: [Xen-devel] [PATCH] xen: adjust early dom0 p2m handling to xen  hypervisor behavior Juergen Gross <jgross@suse.com> - 2017-05-10 10:20 +0200
  Re: [PATCH] xen: adjust early dom0 p2m handling to xen hypervisor  behavior Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2017-05-10 15:50 +0200
    Re: [PATCH] xen: adjust early dom0 p2m handling to xen hypervisor  behavior Juergen Gross <jgross@suse.com> - 2017-05-10 16:30 +0200

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