[Xen-devel] [PATCH v3 28/38] arm/p2m: Modify reference count only if hostp2m active

[Sergej Proskurin <proskurin@xxxxxxxxxxxxx>]

This commit makes sure that the page reference count is updated through
the function "p2m_put_l3_page" only the entries have been freed from the
hosts's p2m.

Signed-off-by: Sergej Proskurin <proskurin@xxxxxxxxxxxxx>
---
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>
---
 xen/arch/arm/p2m.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index cef05ed..df2b85b 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -754,7 +754,7 @@ static void p2m_free_entry(struct p2m_domain *p2m,
     if ( !p2m_valid(entry) || p2m_is_superpage(entry, level) )
         return;
 
-    if ( level == 3 )
+    if ( level == 3 && p2m_is_hostp2m(p2m) )
     {
         p2m_put_l3_page(_mfn(entry.p2m.base), entry.p2m.type);
         return;
-- 
2.9.0


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