[PATCH 1/6] arm64: mm: Add __virt_to_idmap() to keep kvm build happy

[Santosh Shilimkar]

ARM kvm code will make use of __virt_to_idmap() on arm32
machines as hardware interconnect supported alias of physical
memory for idmap purposes. The same code is shared with arm64
bit and hence will break the builds. So we add __virt_to_idmap()
which is just __virt_to_phys() on arm64 bit to keep build happy.

Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will.deacon at arm.com>
Cc: Marc Zyngier <marc.zyngier at arm.com>
Cc: Christoffer Dall <christoffer.dall at linaro.org>

Signed-off-by: Santosh Shilimkar <santosh.shilimkar at ti.com>
---
 arch/arm64/include/asm/memory.h |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 3776217..d9341ee 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -75,6 +75,14 @@
 #define __phys_to_virt(x)	((unsigned long)((x) - PHYS_OFFSET + PAGE_OFFSET))
 
 /*
+ * Added to keep arm64 kvm build working which shares code with
+ * 32bit port. ARM kvm code makes use of __virt_to_idmap() on arm32
+ * machines as hardware interconnect supported alias of physical
+ * memory for idmap purposes.
+ */
+#define virt_to_idmap(x)	__virt_to_phys(x)
+
+/*
  * Convert a physical address to a Page Frame Number and back
  */
 #define	__phys_to_pfn(paddr)	((unsigned long)((paddr) >> PAGE_SHIFT))
-- 
1.7.9.5