[Xen-devel] [PATCH v3 06/10] xen: arm: Add a pte_of_xenaddr helper

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

The open coded version is pretty ugly, not helped by rigid enforcement of an
80 character line length.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 xen/arch/arm/mm.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 7781202..974d6df 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -331,6 +331,13 @@ void __cpuinit setup_virt_paging(void)
      * write to TTBR0 has completed. */                                 \
     flush_xen_text_tlb()
 
+static inline lpae_t pte_of_xenaddr(vaddr_t va)
+{
+    paddr_t ma = va + phys_offset;
+    unsigned long mfn = ma >> PAGE_SHIFT;
+    return mfn_to_xen_entry(mfn);
+}
+
 /* Boot-time pagetable setup.
  * Changes here may need matching changes in head.S */
 void __init setup_pagetables(unsigned long boot_phys_offset, paddr_t xen_paddr)
@@ -387,8 +394,7 @@ void __init setup_pagetables(unsigned long 
boot_phys_offset, paddr_t xen_paddr)
     flush_xen_text_tlb();
 
     /* Link in the fixmap pagetable */
-    pte = mfn_to_xen_entry((((unsigned long) xen_fixmap) + phys_offset)
-                           >> PAGE_SHIFT);
+    pte = pte_of_xenaddr((vaddr_t)xen_fixmap);
     pte.pt.table = 1;
     write_pte(xen_second + second_table_offset(FIXMAP_ADDR(0)), pte);
     /*
@@ -415,8 +421,7 @@ void __init setup_pagetables(unsigned long 
boot_phys_offset, paddr_t xen_paddr)
         write_pte(xen_xenmap + i, pte);
         /* No flush required here as page table is not hooked in yet. */
     }
-    pte = mfn_to_xen_entry((((unsigned long) xen_xenmap) + phys_offset)
-                           >> PAGE_SHIFT);
+    pte = pte_of_xenaddr((vaddr_t)xen_xenmap);
     pte.pt.table = 1;
     write_pte(xen_second + second_linear_offset(XEN_VIRT_START), pte);
     /* TLBFLUSH and ISB would be needed here, but wait until we set WXN */
-- 
1.7.2.5


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