linux-kernel - Re: [PATCH] EDD: Check for correct EDD 3.0 length

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]

Message-ID: <20120515152942.GH6948@redhat.com>
Date:	Tue, 15 May 2012 18:29:42 +0300
From:	Gleb Natapov <gleb@...hat.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Hannes Reinecke <hare@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...ux.intel.com>
Subject: Re: [PATCH] EDD: Check for correct EDD 3.0 length

On Tue, May 15, 2012 at 04:22:26PM +0100, Alan Cox wrote:
> On Tue, 15 May 2012 17:53:16 +0300
> Gleb Natapov <gleb@...hat.com> wrote:
> 
> > On Tue, May 15, 2012 at 03:52:06PM +0100, Alan Cox wrote:
> > > > It is easy to be confused since there are two EDD 3 specs. First is from
> > > > Phoenix BIOS (linked at the first mail of the thread) and it does not have
> > > > enough info even for ATA. You can't tell primary ATA controller from secondary.
> > > 
> > > Yes you can - it's defined by the PCI specification for compatibility
> > How? ATA device path has only Master/Slave. Interface path has only
> > bus/slot/function. So given all that in int13_80 how do I know if this
> > is primary or secondary controller?
> 
> For compatibility mode by the I/O port address.
> 
Hmm, will work if standard I/O addresses are used for master/slave, but
I do not see this information be exposed via /sys by EDD. So how can I
do it from OS installer with current kernel or kernel with reverted
patch?

> For native mode most controllers pretend to be two devfns for exactly
> this reason, and report one on each. Some non-MMIO devices don't and you
> can tell them apart by looking at the addresses given in DPTE as well.
> 
> Simples.. 
> 
> Alan

--
			Gleb.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/