[Xen-changelog] [xen staging] npt/shadow: allow getting foreign page table entries

[patchbot@xxxxxxx]

commit b50acc560b09ef7c7274011a95dff7121563f3f2
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Wed Feb 27 12:09:05 2019 +0100
Commit:     George Dunlap <george.dunlap@xxxxxxxxxx>
CommitDate: Thu Feb 28 17:36:43 2019 +0000

    npt/shadow: allow getting foreign page table entries
    
    Current npt and shadow code to get an entry will always return
    INVALID_MFN for foreign entries. Allow to return the entry mfn for
    foreign entries, like it's done for grant table entries.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: George Dunlap <george.dunlap@xxxxxxxxxx>
---
 xen/arch/x86/mm/p2m-pt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/mm/p2m-pt.c b/xen/arch/x86/mm/p2m-pt.c
index e62bafcfb7..cafc9f299b 100644
--- a/xen/arch/x86/mm/p2m-pt.c
+++ b/xen/arch/x86/mm/p2m-pt.c
@@ -903,8 +903,8 @@ pod_retry_l1:
     *t = p2m_recalc_type(recalc || _needs_recalc(flags), l1t, p2m, gfn);
     unmap_domain_page(l1e);
 
-    ASSERT(mfn_valid(mfn) || !p2m_is_ram(*t) || p2m_is_paging(*t));
-    return (p2m_is_valid(*t) || p2m_is_grant(*t)) ? mfn : INVALID_MFN;
+    ASSERT(mfn_valid(mfn) || !p2m_is_any_ram(*t) || p2m_is_paging(*t));
+    return (p2m_is_valid(*t) || p2m_is_any_ram(*t)) ? mfn : INVALID_MFN;
 }
 
 static void p2m_pt_change_entry_type_global(struct p2m_domain *p2m,
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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