[PATCH] x86/altp2m: treat view 0 as the hostp2m in p2m_get_mem_access()

[PATCH] x86/altp2m: treat view 0 as the hostp2m in p2m_get_mem_access()

[Razvan Cojocaru]

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@bitdefender.com>
---
 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 56c06a4..a144bb0 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) )
-- 
2.7.4


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Re: [PATCH] x86/altp2m: treat view 0 as the hostp2m in p2m_get_mem_access()

[Tamas K Lengyel]

On Wed, Apr 3, 2019 at 2:56 AM Razvan Cojocaru
<rcojocaru@bitdefender.com> wrote:
>
> 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@bitdefender.com>

Acked-by: Tamas K Lengyel <tamas@tklengyel.com>

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