[Xen-changelog] [xen stable-4.12] x86/altp2m: treat view 0 as the hostp2m in p2m_get_mem_access()

[patchbot@xxxxxxx]

commit 3d7177d2700c5466841263d555b43425e60836ce
Author:     Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
AuthorDate: Fri Jul 19 16:08:48 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jul 19 16:08:48 2019 +0200

    x86/altp2m: treat view 0 as the hostp2m in p2m_get_mem_access()
    
    p2m_set_mem_access() (and other places) treat view 0 as the
    hostp2m, but p2m_get_mem_access() does not. Correct that
    inconsistency.
    
    Signed-off-by: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
    Acked-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
    master commit: 44f3c3cdd315668fee2a336f659a580cc0279bf3
    master date: 2019-04-03 15:14:30 +0100
---
 xen/arch/x86/mm/mem_access.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/mm/mem_access.c b/xen/arch/x86/mm/mem_access.c
index 56c06a4fc6..a144bb0ce4 100644
--- a/xen/arch/x86/mm/mem_access.c
+++ b/xen/arch/x86/mm/mem_access.c
@@ -505,7 +505,7 @@ int p2m_get_mem_access(struct domain *d, gfn_t gfn, 
xenmem_access_t *access,
         if ( altp2m_idx )
             return -EINVAL;
     }
-    else
+    else if ( altp2m_idx ) /* altp2m view 0 is treated as the hostp2m */
     {
         if ( altp2m_idx >= MAX_ALTP2M ||
              d->arch.altp2m_eptp[altp2m_idx] == mfn_x(INVALID_MFN) )
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.12

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