linux-kernel - Re: [PATCH 3/9] MIPS: remove the HT

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Message-ID: <20181119210141.nissqr6zaldt23xg@pburton-laptop>
Date:   Mon, 19 Nov 2018 21:01:42 +0000
From:   Paul Burton <paul.burton@...s.com>
To:     Christoph Hellwig <hch@....de>
CC:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Matt Porter <mporter@...nel.crashing.org>,
        Alexandre Bounine <alex.bou9@...il.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        "linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-alpha@...r.kernel.org" <linux-alpha@...r.kernel.org>,
        "linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>
Subject: Re: [PATCH 3/9] MIPS: remove the HT_PCI config option

Hi Christoph,

On Thu, Nov 15, 2018 at 08:05:31PM +0100, Christoph Hellwig wrote:
> This option is always selected from LOONGSON_MACH3X.  Switch to just
> seleting PCI from that option and definining LOONGSON_PCIIO_BASE based
> on CONFIG_LOONGSON_MACH3X.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  arch/mips/Kconfig                                | 11 -----------
>  arch/mips/include/asm/mach-loongson64/loongson.h |  2 +-
>  arch/mips/loongson64/Kconfig                     |  2 +-
>  3 files changed, 2 insertions(+), 13 deletions(-)
> 
> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index 8272ea4c7264..7d28c9dd75d0 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -3040,17 +3040,6 @@ config PCI
>  	  your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
>  	  say Y, otherwise N.
>  
> -config HT_PCI
> -	bool "Support for HT-linked PCI"
> -	default y
> -	depends on CPU_LOONGSON3
> -	select PCI
> -	select PCI_DOMAINS
> -	help
> -	  Loongson family machines use Hyper-Transport bus for inter-core
> -	  connection and device connection. The PCI bus is a subordinate
> -	  linked at HT. Choose Y for Loongson-3 based machines.
> -
>  config PCI_DOMAINS
>  	bool
>  
> diff --git a/arch/mips/loongson64/Kconfig b/arch/mips/loongson64/Kconfig
> index c865b4b9b775..781a5156ab21 100644
> --- a/arch/mips/loongson64/Kconfig
> +++ b/arch/mips/loongson64/Kconfig
> @@ -76,7 +76,7 @@ config LOONGSON_MACH3X
>  	select CPU_HAS_WB
>  	select HW_HAS_PCI
>  	select ISA
> -	select HT_PCI
> +	select PCI
>  	select I8259
>  	select IRQ_MIPS_CPU
>  	select NR_CPUS_DEFAULT_4

Should this also select PCI_DOMAINS to preserve the existing behavior?

If not, could you explain why in the commit message?

Thanks,
    Paul