diff mbox

[Xen-devel,RFC,07/22] xen/arm: p2m: Rework p2m_put_l3_page

Message ID 1469717505-8026-8-git-send-email-julien.grall@arm.com
State New
Headers show

Commit Message

Julien Grall July 28, 2016, 2:51 p.m. UTC 
Modify the prototype to directly pass the mfn and the type in
parameters. This will be useful later when we do not have the entry in
hand.

Signed-off-by: Julien Grall <julien.grall@arm.com>
---
 xen/arch/arm/p2m.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)
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Patch

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index aecdd1e..6b29cf0 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -584,10 +584,8 @@  enum p2m_operation {
  * TODO: Handle superpages, for now we only take special references for leaf
  * pages (specifically foreign ones, which can't be super mapped today).
  */
-static void p2m_put_l3_page(const lpae_t pte)
+static void p2m_put_l3_page(mfn_t mfn, p2m_type_t type)
 {
-    ASSERT(p2m_valid(pte));
-
     /*
      * TODO: Handle other p2m types
      *
@@ -595,12 +593,10 @@  static void p2m_put_l3_page(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(type) )
     {
-        unsigned long mfn = pte.p2m.base;
-
-        ASSERT(mfn_valid(mfn));
-        put_page(mfn_to_page(mfn));
+        ASSERT(mfn_valid(mfn_x(mfn)));
+        put_page(mfn_to_page(mfn_x(mfn)));
     }
 }
 
@@ -734,7 +730,8 @@  static int apply_one_level(struct domain *d,
                  */
                 BUG_ON(level < 3 && p2m_table(orig_pte));
                 if ( level == 3 )
-                    p2m_put_l3_page(orig_pte);
+                    p2m_put_l3_page(_mfn(orig_pte.p2m.base),
+                                    orig_pte.p2m.type);
             }
             else /* New mapping */
                 p2m->stats.mappings[level]++;
@@ -834,7 +831,7 @@  static int apply_one_level(struct domain *d,
         p2m->stats.mappings[level]--;
 
         if ( level == 3 )
-            p2m_put_l3_page(orig_pte);
+            p2m_put_l3_page(_mfn(orig_pte.p2m.base), orig_pte.p2m.type);
 
         /*
          * This is still a single pte write, no matter the level, so no need to