linux-kernel - Re: [PATCH 17/19] x86, msi: Introduce x86_msi.compose_msi

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: <20120821154146.GN2582@amd.com>
Date:	Tue, 21 Aug 2012 17:41:46 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	Konrad Rzeszutek Wilk <konrad@...nel.org>
CC:	<x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	<joro@...tes.org>, Suresh Siddha <suresh.b.siddha@...el.com>,
	Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH 17/19] x86, msi: Introduce x86_msi.compose_msi_msg
 call-back

On Tue, Aug 21, 2012 at 10:42:57AM -0400, Konrad Rzeszutek Wilk wrote:
> On Tue, Aug 21, 2012 at 10:40:07AM +0200, Joerg Roedel wrote:
> > On Mon, Aug 20, 2012 at 10:08:44AM -0400, Konrad Rzeszutek Wilk wrote:
> > > On Mon, Aug 20, 2012 at 03:56:03PM +0200, Joerg Roedel wrote:
> > > > This call-back points to the right function for initializing
> > > > the msi_msg structure.
> > > 
> > > What is the 'hpet_id' purpose in this?
> > 
> > The VT-d implementation uses it. This function is used to create the MSI
> > message for PCI devices and the HPET. When it is called for the HPET the
> > pdev parameter is NULL and hpet_id is valid.
> 
> Perhaps then a more generic term? 'void *platform_priv' ?

Well, the best approach is probably to remove both, the pdev and the
hpet parameter and replace it with an req_id parameter that is passed
down instead. IOMMU code needs to expose the hpet request-ids then with
another call-back. But that is cleaner than the current compose_msi_msg
call-back.


	Joerg

-- 
AMD Operating System Research Center

Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
General Managers: Alberto Bozzo
Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632

--
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/