[Xen-devel] [PATCH v4 25/39] 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 when the entries have been freed
from the host's p2m.

Signed-off-by: Sergej Proskurin <proskurin@xxxxxxxxxxxxx>
---
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>

v4: Moved the check for the host's p2m from "p2m_free_entry" to
    "p2m_put_l3_page".
---
 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 246250d8c6..e9274c74a8 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -617,7 +617,7 @@ static void p2m_put_l3_page(struct p2m_domain *p2m, const 
lpae_t pte)
      * flush the TLBs if the page is reallocated before the end of
      * this loop.
      */
-    if ( p2m_is_foreign(pte.p2m.type) )
+    if ( p2m_is_foreign(pte.p2m.type) && p2m_is_hostp2m(p2m) )
     {
         mfn_t mfn = _mfn(pte.p2m.base);
 
-- 
2.13.3


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