From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: pv-grub boot hangs when iommu=soft. Booting kernel
	directly with the flags works. MiniOS screws around with page flags.
Date: Wed, 7 Jul 2010 09:25:40 -0400
Message-ID: <20100707132540.GA4823@phenom.dumpdata.com>
References: <4BBA5E4B.5010307@triad.rr.com>
	<20100405221824.GA26620@phenom.dumpdata.com>
	<20100406002507.GP23034@const.famille.thibault.fr>
	<20100407162416.GE26620@phenom.dumpdata.com>
	<20100407163319.GZ4920@const.bordeaux.inria.fr>
	<4BBCB87F.4080502@triad.rr.com>
	<20100407165739.GD4920@const.bordeaux.inria.fr>
	<AANLkTilBN_VeusEpVTE0CwwORY2q5MQr4KSgxcuQ2Kp8@mail.gmail.com>
	<20100706164256.GC25263@phenom.dumpdata.com>
	<4C33A1E1.40206@triad.rr.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <xen-devel-bounces@lists.xensource.com>
Content-Disposition: inline
In-Reply-To: <4C33A1E1.40206@triad.rr.com>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Richie <listmail@triad.rr.com>
Cc: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

On Tue, Jul 06, 2010 at 05:36:33PM -0400, Richie wrote:
> Konrad Rzeszutek Wilk wrote:
> >[    0.000000] Kernel command line: ro root=/dev/mapper/vg_vs03-lv_root rd_LVM_LV=vg_vs03/lv_root rd_LVM_LV=vg_vs03/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us debug earlyprintk=xen console=hvc0 iommu=swiotlb swiotlb=force
> >[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
> shouldn't that be iommu=soft or is it another valid spec.?

It should be as iommu=soft. If you use the override (swiotlb=force) it
can also automatically turn SWIOTLB on.