[Xen-changelog] [xen master] xen/arm: p2m: Store the page for each mapping

[patchbot@xxxxxxx]

commit 0cc05ca868036ea8751688b29d77f32ca0acb710
Author:     Julien Grall <julien.grall@xxxxxxxxxx>
AuthorDate: Tue Dec 1 17:52:10 2015 +0000
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Tue Dec 15 11:58:54 2015 +0000

    xen/arm: p2m: Store the page for each mapping
    
    The page will be use later for reference counting. So we need a quick
    access to the page associated to the mapping.
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/p2m.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index f910cab..f28ae3f 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -942,6 +942,7 @@ static int apply_p2m_changes(struct domain *d,
     int rc, ret;
     struct p2m_domain *p2m = &d->arch.p2m;
     lpae_t *mappings[4] = { NULL, NULL, NULL, NULL };
+    struct page_info *pages[4] = { NULL, NULL, NULL, NULL };
     paddr_t addr, orig_maddr = maddr;
     unsigned int level = 0;
     unsigned int cur_root_table = ~0;
@@ -964,7 +965,10 @@ static int apply_p2m_changes(struct domain *d,
 
     /* Static mapping. P2M_ROOT_PAGES > 1 are handled below */
     if ( P2M_ROOT_PAGES == 1 )
+    {
         mappings[P2M_ROOT_LEVEL] = __map_domain_page(p2m->root);
+        pages[P2M_ROOT_LEVEL] = p2m->root;
+    }
 
     addr = start_gpaddr;
     while ( addr < end_gpaddr )
@@ -1047,6 +1051,7 @@ static int apply_p2m_changes(struct domain *d,
                     unmap_domain_page(mappings[P2M_ROOT_LEVEL]);
                 mappings[P2M_ROOT_LEVEL] =
                     __map_domain_page(p2m->root + root_table);
+                pages[P2M_ROOT_LEVEL] = p2m->root + root_table;
                 cur_root_table = root_table;
                 /* Any mapping further down is now invalid */
                 for ( i = P2M_ROOT_LEVEL; i < 4; i++ )
@@ -1079,6 +1084,7 @@ static int apply_p2m_changes(struct domain *d,
                 if ( mappings[level+1] )
                     unmap_domain_page(mappings[level+1]);
                 mappings[level+1] = map_domain_page(_mfn(entry->p2m.base));
+                pages[level+1] = mfn_to_page(entry->p2m.base);
                 cur_offset[level] = offset;
                 /* Any mapping further down is now invalid */
                 for ( i = level+1; i < 4; i++ )
--
generated by git-patchbot for /home/xen/git/xen.git#master

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