linux-kernel - Re: [PATCH] msi: set 'En' bit of MSI Mapping Capability

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: <m1lk7kl3de.fsf@ebiederm.dsl.xmission.com>
Date:	Mon, 24 Dec 2007 04:49:01 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"Peer Chen" <pchen@...dia.com>
Cc:	"peerchen" <peerchen@...il.com>,
	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"akpm" <akpm@...ux-foundation.org>,
	"Andy Currid" <ACurrid@...dia.com>
Subject: Re: [PATCH] msi: set 'En' bit of MSI Mapping Capability

"Peer Chen" <pchen@...dia.com> writes:

> I feel it's dangerous to set the En bit on Intel platform, If the HT MSI
> En is set, the MSI should be expected to transform to HT INT message
> format. It may cause interrupt lost or hardware internal state machine
> failed depend on the hardware design.

Reasonable.  As long as what the quirk is to avoid errata and
chipset specific issues I don't have a problem with it.

I figure the quirk should be a separate patch though.

My concern is that the general rule that always enabling HT MSI
mapping capabilities is reasonable.  Even if there are some
specific exceptions where we don't want to do that.

I want code that requires the smallest list of chipset
exceptions that we can make. 

Eric
--
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/