[Xen-devel] [PATCH 17/38] arm: allow p2m to be created with specific MATTR.

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/p2m.c         |   15 ++++++++-------
 xen/include/asm-arm/page.h |    6 ++++--
 2 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 9b40e93..46c6f17 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -148,7 +148,7 @@ static int p2m_create_entry(struct domain *d,
     clear_page(p);
     unmap_domain_page(p);
 
-    pte = mfn_to_p2m_entry(page_to_mfn(page));
+    pte = mfn_to_p2m_entry(page_to_mfn(page), MATTR_MEM);
 
     write_pte(entry, pte);
 
@@ -159,7 +159,8 @@ static int create_p2m_entries(struct domain *d,
                      int alloc,
                      paddr_t start_gpaddr,
                      paddr_t end_gpaddr,
-                     paddr_t maddr)
+                     paddr_t maddr,
+                     int mattr)
 {
     int rc;
     struct p2m_domain *p2m = &d->arch.p2m;
@@ -235,11 +236,11 @@ static int create_p2m_entries(struct domain *d,
                 goto out;
             }
 
-            pte = mfn_to_p2m_entry(page_to_mfn(page));
+            pte = mfn_to_p2m_entry(page_to_mfn(page), mattr);
 
             write_pte(&third[third_table_offset(addr)], pte);
         } else {
-            lpae_t pte = mfn_to_p2m_entry(maddr >> PAGE_SHIFT);
+            lpae_t pte = mfn_to_p2m_entry(maddr >> PAGE_SHIFT, mattr);
             write_pte(&third[third_table_offset(addr)], pte);
             maddr += PAGE_SIZE;
         }
@@ -263,7 +264,7 @@ int p2m_populate_ram(struct domain *d,
                      paddr_t start,
                      paddr_t end)
 {
-    return create_p2m_entries(d, 1, start, end, 0);
+    return create_p2m_entries(d, 1, start, end, 0, MATTR_MEM);
 }
 
 int map_mmio_regions(struct domain *d,
@@ -271,7 +272,7 @@ int map_mmio_regions(struct domain *d,
                      paddr_t end_gaddr,
                      paddr_t maddr)
 {
-    return create_p2m_entries(d, 0, start_gaddr, end_gaddr, maddr);
+    return create_p2m_entries(d, 0, start_gaddr, end_gaddr, maddr, MATTR_DEV);
 }
 
 int guest_physmap_add_page(struct domain *d,
@@ -281,7 +282,7 @@ int guest_physmap_add_page(struct domain *d,
 {
     return create_p2m_entries(d, 0, gpfn << PAGE_SHIFT,
                               (gpfn + (1<<page_order)) << PAGE_SHIFT,
-                              mfn << PAGE_SHIFT);
+                              mfn << PAGE_SHIFT, MATTR_MEM);
 }
 
 void guest_physmap_remove_page(struct domain *d,
diff --git a/xen/include/asm-arm/page.h b/xen/include/asm-arm/page.h
index c7b6530..bb1729a 100644
--- a/xen/include/asm-arm/page.h
+++ b/xen/include/asm-arm/page.h
@@ -46,6 +46,8 @@
 #define DEV_WC        BUFFERABLE
 #define DEV_CACHED    WRITEBACK
 
+#define MATTR_DEV     0x1
+#define MATTR_MEM     0xf
 
 #ifndef __ASSEMBLY__
 
@@ -169,7 +171,7 @@ static inline lpae_t mfn_to_xen_entry(unsigned long mfn)
     return e;
 }
 
-static inline lpae_t mfn_to_p2m_entry(unsigned long mfn)
+static inline lpae_t mfn_to_p2m_entry(unsigned long mfn, unsigned int mattr)
 {
     paddr_t pa = ((paddr_t) mfn) << PAGE_SHIFT;
     lpae_t e = (lpae_t) {
@@ -178,7 +180,7 @@ static inline lpae_t mfn_to_p2m_entry(unsigned long mfn)
         .p2m.sh = LPAE_SH_OUTER,
         .p2m.write = 1,
         .p2m.read = 1,
-        .p2m.mattr = 0xf,
+        .p2m.mattr = mattr,
         .p2m.table = 1,
         .p2m.valid = 1,
     };
-- 
1.7.9.1


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel