arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig

Define this symbol if the architecture either uses 64-bit pointers or the
PHYS_ADDR_T_64BIT is set.  This covers 95% of the old arch magic.  We only
need an additional select for Xen on ARM (why anyway?), and we now always
set ARCH_DMA_ADDR_T_64BIT on mips boards with 64-bit physical addressing
instead of only doing it when highmem is set.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NJames Hogan <jhogan@kernel.org>

arch/alpha/Kconfig

@@ -66,9 +66,6 @@ config ZONE_DMA
 	bool
 	default y
 
-config ARCH_DMA_ADDR_T_64BIT
-	def_bool y
-
 config GENERIC_ISA_DMA
 	bool
 	default y

arch/arc/Kconfig

@@ -458,9 +458,6 @@ config ARC_HAS_PAE40
 	  Enable access to physical memory beyond 4G, only supported on
 	  ARC cores with 40 bit Physical Addressing support
 
-config ARCH_DMA_ADDR_T_64BIT
-	bool
-
 config ARC_KVADDR_SIZE
 	int "Kernel Virtual Address Space size (MB)"
 	range 0 512

arch/arm/mach-axxia/Kconfig

@@ -2,7 +2,6 @@
 config ARCH_AXXIA
 	bool "LSI Axxia platforms"
 	depends on ARCH_MULTI_V7 && ARM_LPAE
-	select ARCH_DMA_ADDR_T_64BIT
 	select ARM_AMBA
 	select ARM_GIC
 	select ARM_TIMER_SP804

arch/arm/mach-bcm/Kconfig

@@ -211,7 +211,6 @@ config ARCH_BRCMSTB
 	select BRCMSTB_L2_IRQ
 	select BCM7120_L2_IRQ
 	select ARCH_HAS_HOLES_MEMORYMODEL
-	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
 	select ZONE_DMA if ARM_LPAE
 	select SOC_BRCMSTB
 	select SOC_BUS

arch/arm/mach-exynos/Kconfig

@@ -112,7 +112,6 @@ config SOC_EXYNOS5440
 	bool "SAMSUNG EXYNOS5440"
 	default y
 	depends on ARCH_EXYNOS5
-	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
 	select HAVE_ARM_ARCH_TIMER
 	select AUTO_ZRELADDR
 	select PINCTRL_EXYNOS5440

arch/arm/mach-highbank/Kconfig

 config ARCH_HIGHBANK
 	bool "Calxeda ECX-1000/2000 (Highbank/Midway)"
 	depends on ARCH_MULTI_V7
-	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
 	select ARCH_HAS_HOLES_MEMORYMODEL
 	select ARCH_SUPPORTS_BIG_ENDIAN
 	select ARM_AMBA

arch/arm/mach-rockchip/Kconfig

@@ -3,7 +3,6 @@ config ARCH_ROCKCHIP
 	depends on ARCH_MULTI_V7
 	select PINCTRL
 	select PINCTRL_ROCKCHIP
-	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
 	select ARCH_HAS_RESET_CONTROLLER
 	select ARM_AMBA
 	select ARM_GIC

arch/arm/mach-shmobile/Kconfig

@@ -29,7 +29,6 @@ config ARCH_RMOBILE
 menuconfig ARCH_RENESAS
 	bool "Renesas ARM SoCs"
 	depends on ARCH_MULTI_V7 && MMU
-	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
 	select ARCH_SHMOBILE
 	select ARM_GIC
 	select GPIOLIB

arch/arm/mach-tegra/Kconfig

@@ -15,6 +15,5 @@ menuconfig ARCH_TEGRA
 	select RESET_CONTROLLER
 	select SOC_BUS
 	select ZONE_DMA if ARM_LPAE
-	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
 	help
 	  This enables support for NVIDIA Tegra based systems.

arch/arm/mm/Kconfig

@@ -674,9 +674,6 @@ config ARM_PV_FIXUP
 	def_bool y
 	depends on ARM_LPAE && ARM_PATCH_PHYS_VIRT && ARCH_KEYSTONE
 
-config ARCH_DMA_ADDR_T_64BIT
-	bool
-
 config ARM_THUMB
 	bool "Support Thumb user binaries" if !CPU_THUMBONLY && EXPERT
 	depends on CPU_THUMB_CAPABLE

arch/arm64/Kconfig

@@ -235,9 +235,6 @@ config ZONE_DMA32
 config HAVE_GENERIC_GUP
 	def_bool y
 
-config ARCH_DMA_ADDR_T_64BIT
-	def_bool y
-
 config SMP
 	def_bool y
 

arch/ia64/Kconfig

@@ -79,9 +79,6 @@ config MMU
 	bool
 	default y
 
-config ARCH_DMA_ADDR_T_64BIT
-	def_bool y
-
 config SWIOTLB
        bool
 

arch/mips/Kconfig

@@ -1100,9 +1100,6 @@ config GPIO_TXX9
 config FW_CFE
 	bool
 
-config ARCH_DMA_ADDR_T_64BIT
-	def_bool (HIGHMEM && PHYS_ADDR_T_64BIT) || 64BIT
-
 config ARCH_SUPPORTS_UPROBES
 	bool
 

arch/powerpc/Kconfig

@@ -13,9 +13,6 @@ config 64BIT
 	bool
 	default y if PPC64
 
-config ARCH_DMA_ADDR_T_64BIT
-	def_bool PHYS_ADDR_T_64BIT
-
 config MMU
 	bool
 	default y

arch/riscv/Kconfig

@@ -44,9 +44,6 @@ config ZONE_DMA32
 	bool
 	default y
 
-config ARCH_DMA_ADDR_T_64BIT
-	def_bool y
-
 config PAGE_OFFSET
 	hex
 	default 0xC0000000 if 32BIT && MAXPHYSMEM_2GB

arch/s390/Kconfig

@@ -35,9 +35,6 @@ config GENERIC_BUG
 config GENERIC_BUG_RELATIVE_POINTERS
 	def_bool y
 
-config ARCH_DMA_ADDR_T_64BIT
-	def_bool y
-
 config GENERIC_LOCKBREAK
 	def_bool y if SMP && PREEMPT
 

arch/sparc/Kconfig

@@ -104,10 +104,6 @@ config ARCH_ATU
 	bool
 	default y if SPARC64
 
-config ARCH_DMA_ADDR_T_64BIT
-	bool
-	default y if ARCH_ATU
-
 config STACKTRACE_SUPPORT
 	bool
 	default y if SPARC64

arch/x86/Kconfig

@@ -1479,10 +1479,6 @@ config X86_5LEVEL
 
 	  Say N if unsure.
 
-config ARCH_DMA_ADDR_T_64BIT
-	def_bool y
-	depends on X86_64 || HIGHMEM64G
-
 config X86_DIRECT_GBPAGES
 	def_bool y
 	depends on X86_64 && !DEBUG_PAGEALLOC

lib/Kconfig

@@ -435,6 +435,9 @@ config NEED_SG_DMA_LENGTH
 config NEED_DMA_MAP_STATE
 	bool
 
+config ARCH_DMA_ADDR_T_64BIT
+	def_bool 64BIT || PHYS_ADDR_T_64BIT
+
 config IOMMU_HELPER
 	bool