[Xen-devel] [PATCH v5 06/10] xen/arm: Retrieve p2m type in get_page_from_gfn

[Julien Grall <julien.grall@xxxxxxxxxx>]

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>

---
    Changes in v3:
        - Return NULL when p2m type is invalid or mmio
    Changes in v2:
        - Use p2m_lookup as p2m_get_entry was removed
---
 xen/include/asm-arm/p2m.h |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
index 9d0d1e7..0eb07a8 100644
--- a/xen/include/asm-arm/p2m.h
+++ b/xen/include/asm-arm/p2m.h
@@ -109,11 +109,17 @@ static inline struct page_info *get_page_from_gfn(
     struct domain *d, unsigned long gfn, p2m_type_t *t, p2m_query_t q)
 {
     struct page_info *page;
-    unsigned long mfn = gmfn_to_mfn(d, gfn);
+    p2m_type_t p2mt;
+    paddr_t maddr = p2m_lookup(d, pfn_to_paddr(gfn), &p2mt);
+    unsigned long mfn = maddr >> PAGE_SHIFT;
 
-    ASSERT(t == NULL);
+    if (t)
+        *t = p2mt;
 
-    if (!mfn_valid(mfn))
+    if ( p2mt == p2m_invalid || p2mt == p2m_mmio_direct )
+        return NULL;
+
+    if ( !mfn_valid(mfn) )
         return NULL;
     page = mfn_to_page(mfn);
     if ( !get_page(page, d) )
-- 
1.7.10.4


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