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

[patchbot@xxxxxxx]

commit 44f3c3cdd315668fee2a336f659a580cc0279bf3
Author:     Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
AuthorDate: Wed Apr 3 11:56:37 2019 +0300
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Wed Apr 3 15:14:30 2019 +0100

    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>
---
 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#staging

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