PCI: consolidate the PCI_DOMAINS and PCI_DOMAINS_GENERIC config options

Move the definitions to drivers/pci and let the architectures select
them.  Two small differences to before: PCI_DOMAINS_GENERIC now selects
PCI_DOMAINS, cutting down the churn for modern architectures.  As the
only architectured arm did previously also offer PCI_DOMAINS as a user
visible choice in addition to selecting it from the relevant configs,
this is gone now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/alpha/Kconfig

@@ -7,6 +7,7 @@ config ALPHA
 	select ARCH_NO_PREEMPT
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select FORCE_PCI if !ALPHA_JENSEN
+	select PCI_DOMAINS if PCI
 	select HAVE_AOUT
 	select HAVE_IDE
 	select HAVE_OPROFILE
@@ -321,10 +322,6 @@ config ISA_DMA_API
 	bool
 	default y
 
-config PCI_DOMAINS
-	bool
-	default y
-
 config PCI_SYSCALL
 	def_bool PCI
 

arch/arm/Kconfig

@@ -331,7 +331,7 @@ config ARCH_MULTIPLATFORM
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_IRQ_MULTI_HANDLER
 	select HAVE_PCI
-	select PCI_DOMAINS if PCI
+	select PCI_DOMAINS_GENERIC if PCI
 	select SPARSE_IRQ
 	select USE_OF
 
@@ -1227,19 +1227,6 @@ config ISA_DMA
 config ISA_DMA_API
 	bool
 
-config PCI_DOMAINS
-	bool "Support for multiple PCI domains"
-	depends on PCI
-	help
-	  Enable PCI domains kernel management. Say Y if your machine
-	  has a PCI bus hierarchy that requires more than one PCI
-	  domain (aka segment) to be correctly managed. Say N otherwise.
-
-	  If you don't know what to do here, say N.
-
-config PCI_DOMAINS_GENERIC
-	def_bool PCI_DOMAINS
-
 config PCI_NANOENGINE
 	bool "BSE nanoEngine PCI support"
 	depends on SA1100_NANOENGINE

arch/arm/mach-bcm/Kconfig

@@ -20,7 +20,7 @@ config ARCH_BCM_IPROC
 	select GPIOLIB
 	select ARM_AMBA
 	select PINCTRL
-	select PCI_DOMAINS if PCI
+	select PCI_DOMAINS_GENERIC if PCI
 	help
 	  This enables support for systems based on Broadcom IPROC architected SoCs.
 	  The IPROC complex contains one or more ARM CPUs along with common

arch/arm/mach-socfpga/Kconfig

@@ -10,7 +10,7 @@ menuconfig ARCH_SOCFPGA
 	select HAVE_ARM_SCU
 	select HAVE_ARM_TWD if SMP
 	select MFD_SYSCON
-	select PCI_DOMAINS if PCI
+	select PCI_DOMAINS_GENERIC if PCI
 
 if ARCH_SOCFPGA
 config SOCFPGA_SUSPEND

arch/arm64/Kconfig

@@ -164,6 +164,7 @@ config ARM64
 	select OF
 	select OF_EARLY_FLATTREE
 	select OF_RESERVED_MEM
+	select PCI_DOMAINS_GENERIC if PCI
 	select PCI_ECAM if ACPI
 	select POWER_RESET
 	select POWER_SUPPLY
@@ -288,12 +289,6 @@ config ARCH_PROC_KCORE_TEXT
 
 source "arch/arm64/Kconfig.platforms"
 
-config PCI_DOMAINS
-	def_bool PCI
-
-config PCI_DOMAINS_GENERIC
-	def_bool PCI
-
 config PCI_SYSCALL
 	def_bool PCI
 

arch/ia64/Kconfig

@@ -15,6 +15,7 @@ config IA64
 	select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
 	select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
 	select FORCE_PCI if (!IA64_HP_SIM)
+	select PCI_DOMAINS if PCI
 	select HAVE_UNSTABLE_SCHED_CLOCK
 	select HAVE_EXIT_THREAD
 	select HAVE_IDE
@@ -544,9 +545,6 @@ if !IA64_HP_SIM
 
 menu "Bus options (PCI, PCMCIA)"
 
-config PCI_DOMAINS
-	def_bool PCI
-
 config PCI_SYSCALL
 	def_bool PCI
 

arch/microblaze/Kconfig

@@ -36,6 +36,7 @@ config MICROBLAZE
 	select MODULES_USE_ELF_RELA
 	select OF
 	select OF_EARLY_FLATTREE
+	select PCI_DOMAINS_GENERIC if PCI
 	select TRACING_SUPPORT
 	select VIRT_TO_BUS
 	select CPU_NO_EFFICIENT_FFS
@@ -267,12 +268,6 @@ endmenu
 
 menu "Bus Options"
 
-config PCI_DOMAINS
-	def_bool PCI
-
-config PCI_DOMAINS_GENERIC
-	def_bool PCI_DOMAINS
-
 config PCI_SYSCALL
 	def_bool PCI
 

arch/mips/Kconfig

@@ -73,7 +73,6 @@ config MIPS
 	select IRQ_FORCED_THREADING
 	select MODULES_USE_ELF_RELA if MODULES && 64BIT
 	select MODULES_USE_ELF_REL if MODULES
-	select PCI_DOMAINS if PCI
 	select PERF_USE_VMALLOC
 	select RTC_LIB
 	select SYSCTL_EXCEPTION_TRACE
@@ -3028,19 +3027,14 @@ menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
 config HW_HAS_EISA
 	bool
 
-config PCI_DOMAINS
-	bool
-
-config PCI_DOMAINS_GENERIC
-	bool
-
 config PCI_DRIVERS_GENERIC
-	select PCI_DOMAINS_GENERIC if PCI_DOMAINS
+	select PCI_DOMAINS_GENERIC if PCI
 	bool
 
 config PCI_DRIVERS_LEGACY
 	def_bool !PCI_DRIVERS_GENERIC
 	select NO_GENERIC_PCI_IOPORT_MAP
+	select PCI_DOMAINS if PCI
 
 #
 # ISA support is now enabled via select.  Too many systems still have the one

arch/powerpc/Kconfig

@@ -236,6 +236,7 @@ config PPC
 	select OF_RESERVED_MEM
 	select OLD_SIGACTION			if PPC32
 	select OLD_SIGSUSPEND
+	select PCI_DOMAINS			if PCI
 	select RTC_LIB
 	select SPARSE_IRQ
 	select SYSCTL_EXCEPTION_TRACE
@@ -931,9 +932,6 @@ config FSL_GTM
 	help
 	  Freescale General-purpose Timers support
 
-config PCI_DOMAINS
-	def_bool PCI
-
 config PCI_SYSCALL
 	def_bool PCI
 

arch/riscv/Kconfig

@@ -41,6 +41,7 @@ config RISCV
 	select HAVE_PCI
 	select MODULES_USE_ELF_RELA if MODULES
 	select THREAD_INFO_IN_TASK
+	select PCI_DOMAINS_GENERIC if PCI
 	select PCI_MSI if PCI
 	select RISCV_TIMER
 	select GENERIC_IRQ_MULTI_HANDLER
@@ -265,12 +266,6 @@ config CMDLINE_FORCE
 
 endmenu
 
-config PCI_DOMAINS
-	def_bool PCI
-
-config PCI_DOMAINS_GENERIC
-	def_bool PCI
-
 menu "Power management options"
 
 source kernel/power/Kconfig

arch/s390/Kconfig

@@ -181,6 +181,7 @@ config S390
 	select NEED_SG_DMA_LENGTH	if PCI
 	select OLD_SIGACTION
 	select OLD_SIGSUSPEND3
+	select PCI_DOMAINS		if PCI
 	select PCI_MSI			if PCI
 	select SPARSE_IRQ
 	select SYSCTL_EXCEPTION_TRACE
@@ -724,9 +725,6 @@ config PCI_NR_FUNCTIONS
 
 endif	# PCI
 
-config PCI_DOMAINS
-	def_bool PCI
-
 config HAS_IOMEM
 	def_bool PCI
 

arch/sh/Kconfig

@@ -855,9 +855,6 @@ config MAPLE
 	 Dreamcast with a serial line terminal or a remote network
 	 connection.
 
-config PCI_DOMAINS
-	bool
-
 source "drivers/pcmcia/Kconfig"
 
 endmenu

arch/sparc/Kconfig

@@ -90,6 +90,7 @@ config SPARC64
 	select GENERIC_TIME_VSYSCALL
 	select ARCH_CLOCKSOURCE_DATA
 	select ARCH_HAS_PTE_SPECIAL
+	select PCI_DOMAINS if PCI
 
 config ARCH_DEFCONFIG
 	string
@@ -473,9 +474,6 @@ config SUN_LDOMS
 	  Say Y here is you want to support virtual devices via
 	  Logical Domains.
 
-config PCI_DOMAINS
-	def_bool PCI if SPARC64
-
 config PCI_SYSCALL
 	def_bool PCI
 

arch/x86/Kconfig

@@ -197,6 +197,7 @@ config X86
 	select HOTPLUG_SMT			if SMP
 	select IRQ_FORCED_THREADING
 	select NEED_SG_DMA_LENGTH
+	select PCI_DOMAINS			if PCI
 	select PCI_LOCKLESS_CONFIG
 	select PERF_EVENTS
 	select RTC_LIB
@@ -2634,10 +2635,6 @@ config PCI_XEN
 	depends on PCI && XEN
 	select SWIOTLB_XEN
 
-config PCI_DOMAINS
-	def_bool y
-	depends on PCI
-
 config MMCONF_FAM10H
 	def_bool y
 	depends on X86_64 && PCI_MMCONFIG && ACPI

drivers/pci/Kconfig

@@ -21,6 +21,15 @@ menuconfig PCI
 	  support for PCI-X and the foundations for PCI Express support.
 	  Say 'Y' here unless you know what you are doing.
 
+config PCI_DOMAINS
+	bool
+	depends on PCI
+
+config PCI_DOMAINS_GENERIC
+	bool
+	depends on PCI
+	select PCI_DOMAINS
+
 source "drivers/pci/pcie/Kconfig"
 
 config PCI_MSI