linux-kernel - Re: [RFC 01/32] Kconfig: introduce and depend on LEGACY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 28 Dec 2021 09:21:23 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     Arnd Bergmann <arnd@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        John Garry <john.garry@...wei.com>,
        Nick Hu <nickhu@...estech.com>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>, Guo Ren <guoren@...nel.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Ian Abbott <abbotti@....co.uk>,
        H Hartley Sweeten <hsweeten@...ionengravers.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Karsten Keil <isdn@...ux-pingi.de>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sathya Prakash <sathya.prakash@...adcom.com>,
        Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        Suganath Prabu Subramani 
        <suganath-prabu.subramani@...adcom.com>,
        Michael Grzeschik <m.grzeschik@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Kalle Valo <kvalo@...nel.org>, Jouni Malinen <j@...fi>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Hannes Reinecke <hare@...e.com>,
        Kashyap Desai <kashyap.desai@...adcom.com>,
        Sumit Saxena <sumit.saxena@...adcom.com>,
        Shivasharan S <shivasharan.srikanteshwara@...adcom.com>,
        Nilesh Javali <njavali@...vell.com>,
        GR-QLogic-Storage-Upstream@...vell.com,
        Mark Brown <broonie@...nel.org>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Teddy Wang <teddy.wang@...iconmotion.com>,
        Forest Bond <forest@...ttletooquiet.net>,
        Jiri Slaby <jirislaby@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-csky@...r.kernel.org,
        linux-ide@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-hwmon@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-input@...r.kernel.org, netdev@...r.kernel.org,
        linux-media@...r.kernel.org, MPT-FusionLinux.pdl@...adcom.com,
        linux-scsi@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
        linux-wireless@...r.kernel.org, megaraidlinux.pdl@...adcom.com,
        linux-spi@...r.kernel.org, linux-fbdev@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-serial@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-watchdog@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: Re: [RFC 01/32] Kconfig: introduce and depend on LEGACY_PCI

On Mon, Dec 27, 2021 at 05:42:46PM +0100, Niklas Schnelle wrote:
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -23,6 +23,17 @@ menuconfig PCI
>  
>  if PCI
>  
> +config LEGACY_PCI
> +	bool "Enable support for legacy PCI devices"
> +	depends on HAVE_PCI
> +	help
> +	   This option enables support for legacy PCI devices. This includes
> +	   PCI devices attached directly or via a bridge on a PCI Express bus.
> +	   It also includes compatibility features on PCI Express devices which
> +	   make use of legacy I/O spaces.

All you really care about is the "legacy" I/O spaces here, this isn't
tied to PCI specifically at all, right?

So why not just have a OLD_STYLE_IO config option or something like
that, to show that it's the i/o functions we care about here, not PCI at
all?

And maybe not call it "old" or "legacy" as time constantly goes forward,
just describe it as it is, "DIRECT_IO"?

thanks,

greg k-h