mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: RFC: banning device driver reserved resources from /dev/mem
Date: Mon, 6 Oct 2008 15:01:22 +0100	[thread overview]
Message-ID: <20081006150122.3860cae1@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <20081006065213.76dc729a@infradead.org>

> > Only a tiny fraction of devices in the world are PCI, and those
> > platforms where you most what /dev/mem type debugging tools are often
> > those without PCI
> 
> if you looked at the patch it's x86 only, and only active if you set
> CONFIG_STRICT_DEVMEM.
> (if you don't select CONFIG_STRICT_DEVMEM, which is off by default, you
> get unlimited access as usualy)

Lots of non PCI devices on x86 systems as well.

And the video problem is a big one for the x86 case as the VGA ISA window
is used by both the kernel and X without a helper driver.

Alan

  reply	other threads:[~2008-10-06 14:01 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-06  1:01 Arjan van de Ven
2008-10-06  5:23 ` Ingo Molnar
2008-10-06  5:26   ` Arjan van de Ven
2008-10-06  9:27 ` Alan Cox
2008-10-06 13:40   ` Maxim Levitsky
2008-10-06 13:48     ` Alan Cox
2008-10-06 13:52       ` Arjan van de Ven
2008-10-06 14:01         ` Alan Cox [this message]
2008-10-06 14:05           ` Arjan van de Ven
2008-10-06 14:14             ` Alan Cox
2008-10-06 14:24               ` Arjan van de Ven
2008-10-06 14:38                 ` Alan Cox
2008-10-06 14:57                   ` Arjan van de Ven
2008-10-06 15:29                     ` Alan Cox

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20081006150122.3860cae1@lxorguk.ukuu.org.uk \
    --to=alan@lxorguk.ukuu.org.uk \
    --cc=arjan@infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=maximlevitsky@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®