RealView: Add sparsemem support for the RealView PBX platform

[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-realview / Kconfig

diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig
index dfc9b0bc6eb2ecca7889f1d19fd361a568640d57..c48e1f2c3349492472d02316fb77f0cb7f29c8ed 100644 (file)
--- a/arch/arm/mach-realview/Kconfig
+++ b/arch/arm/mach-realview/Kconfig
@@ -70,6 +70,8 @@ config MACH_REALVIEW_PBX
        bool "Support RealView/PBX platform"
        select ARM_GIC
        select HAVE_PATA_PLATFORM
+       select ARCH_SPARSEMEM_ENABLE if CPU_V7 && !HIGH_PHYS_OFFSET
+       select ZONE_DMA if SPARSEMEM
        help
          Include support for the ARM(R) RealView PBX platform.
 
@@ -82,6 +84,7 @@ config REALVIEW_HIGH_PHYS_OFFSET
          0x70000000, 256MB of which being mirrored at 0x00000000. If
          the board supports 512MB of RAM, this option allows the
          memory to be accessed contiguously at the high physical
-         offset.
+         offset. On the PBX board, disabling this option allows 1GB of
+         RAM to be used with SPARSEMEM.
 
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