Re: [Xen-devel] [PATCH 6/7] x86/pagewalk: Consistently use guest_walk_*() helpers for translation

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 27.02.17 at 15:03, <andrew.cooper3@xxxxxxxxxx> wrote:
> --- a/xen/arch/x86/mm/hap/guest_walk.c
> +++ b/xen/arch/x86/mm/hap/guest_walk.c
> @@ -98,7 +98,7 @@ unsigned long hap_p2m_ga_to_gfn(GUEST_PAGING_LEVELS)(
>      /* Interpret the answer */
>      if ( missing == 0 )
>      {
> -        gfn_t gfn = guest_l1e_get_gfn(gw.l1e);
> +        gfn_t gfn = guest_walk_to_gfn(&gw);
>          struct page_info *page;
>          page = get_page_from_gfn_p2m(p2m->domain, p2m, gfn_x(gfn), &p2mt,
>                                       NULL, P2M_ALLOC | P2M_UNSHARE);
> --- a/xen/arch/x86/mm/shadow/multi.c
> +++ b/xen/arch/x86/mm/shadow/multi.c
> @@ -3109,7 +3109,7 @@ static int sh_page_fault(struct vcpu *v,
>      }
>  
>      /* What mfn is the guest trying to access? */
> -    gfn = guest_l1e_get_gfn(gw.l1e);
> +    gfn = guest_walk_to_gfn(&gw);
>      gmfn = get_gfn(d, gfn, &p2mt);
>  
>      if ( shadow_mode_refcounts(d) &&

With these adjusted, guest_l1e_get_gfn() uses left are in shadow's
multi.c (presumably okay to stay) and at the end of
guest_walk_tables() itself. Is that latter one not also in need of
conversion, considering the PSE36 reference in the description?

Jan


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