Commit 077ee78e authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

PCI/MSI: Make arch_.*_msi_irq[s] fallbacks selectable 



The arch_.*_msi_irq[s] fallbacks are compiled in whether an architecture
requires them or not. Architectures which are fully utilizing hierarchical
irq domains should never call into that code.

It's not only architectures which depend on that by implementing one or
more of the weak functions, there is also a bunch of drivers which relies
on the weak functions which invoke msi_controller::setup_irq[s] and
msi_controller::teardown_irq.

Make the architectures and drivers which rely on them select them in Kconfig
and if not selected replace them by stub functions which emit a warning and
fail the PCI/MSI interrupt allocation.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200826112333.992429909@linutronix.de
parent 2c681e6b

arch/ia64/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ config IA64 
	select NEED_DMA_MAP_STATE

	select NEED_SG_DMA_LENGTH

	select NUMA if !FLATMEM

	select PCI_MSI_ARCH_FALLBACKS

	default y

	help

	  The Itanium Processor Family is Intel's 64-bit successor to

arch/mips/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ config MIPS 
	select MODULES_USE_ELF_REL if MODULES

	select MODULES_USE_ELF_RELA if MODULES && 64BIT

	select PERF_USE_VMALLOC

	select PCI_MSI_ARCH_FALLBACKS

	select RTC_LIB

	select SYSCTL_EXCEPTION_TRACE

	select VIRT_TO_BUS

arch/powerpc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -246,6 +246,7 @@ config PPC 
	select OLD_SIGACTION			if PPC32

	select OLD_SIGSUSPEND

	select PCI_DOMAINS			if PCI

	select PCI_MSI_ARCH_FALLBACKS

	select PCI_SYSCALL			if PCI

	select PPC_DAWR				if PPC64

	select RTC_LIB

arch/s390/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -185,6 +185,7 @@ config S390 
	select OLD_SIGSUSPEND3

	select PCI_DOMAINS		if PCI

	select PCI_MSI			if PCI

	select PCI_MSI_ARCH_FALLBACKS

	select SPARSE_IRQ

	select SYSCTL_EXCEPTION_TRACE

	select THREAD_INFO_IN_TASK

arch/sparc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ config SPARC 
	select GENERIC_STRNLEN_USER

	select MODULES_USE_ELF_RELA

	select PCI_SYSCALL if PCI

	select PCI_MSI_ARCH_FALLBACKS

	select ODD_RT_SIGACTION

	select OLD_SIGSUSPEND

	select CPU_NO_EFFICIENT_FFS

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