Re: [PATCH 3/3] pci: Default to PCI_MSI_IRQ_DOMAIN

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On 10/17/19 2:19 PM, Palmer Dabbelt wrote:
> As far as I can tell, the only reason there was an architecture
> whitelist for PCI_MSI_IRQ_DOMAIN is because it requires msi.h.  I've
> built this for all the architectures that play nice with make.cross, but
> I haven't boot tested it anywhere.
>
> Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxx>
> ---
>  drivers/pci/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
> index a304f5ea11b9..77c1428cd945 100644
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -52,7 +52,7 @@ config PCI_MSI
>  	   If you don't know what to do here, say Y.
>  
>  config PCI_MSI_IRQ_DOMAIN
> -	def_bool ARC || ARM || ARM64 || X86 || RISCV
> +	def_bool y
>  	depends on PCI_MSI
>  	select GENERIC_MSI_IRQ_DOMAIN
>  

The linking of asm-generic/msi.h is currently enabled for

./arch/powerpc/include/asm/Kbuild:generic-y += msi.h
./arch/arm/include/asm/Kbuild:generic-y += msi.h
./arch/mips/include/asm/Kbuild:generic-y += msi.h
./arch/riscv/include/asm/Kbuild:generic-y += msi.h
./arch/arc/include/asm/Kbuild:generic-y += msi.h
./arch/arm64/include/asm/Kbuild:generic-y += msi.h
./arch/sparc/include/asm/Kbuild:generic-y += msi.h

Your patchset adds 2 more and x86 has its own asm/msi.h. That leads to a
total of 10 archs, but there are 37 sub-directories under arch. It is
possible that the other architectures don't have PCI_MSI set. Still it
may be a bit risky to set it to "def_bool y".

Cheers,
Longman




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