[Xen-devel] [PATCH v3 8/8] npt/shadow: allow getting foreign page table entries

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

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>
---
Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
---
Changes since v2:
 - Use p2m_is_any_ram.
---
 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 8902c4c9ab..e194b6854b 100644
--- a/xen/arch/x86/mm/p2m-pt.c
+++ b/xen/arch/x86/mm/p2m-pt.c
@@ -869,8 +869,8 @@ 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,
-- 
2.17.2 (Apple Git-113)


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel