From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Hounschell Subject: Re: Can't boot new 4.4 kernel with IOMMU enabled Date: Wed, 20 Jan 2016 11:04:35 -0500 Message-ID: <569FB013.4050709@compro.net> References: <56957209.1080202@compro.net> <20160113030950.GB11902@dhcp-128-28.nay.redhat.com> <56966244.80700@compro.net> <20160114000520.GA2449@x1.redhat.com> <5697AAD8.1000105@compro.net> <20160120153823.GG18805@8bytes.org> <20160120154658.GH18805@8bytes.org> Reply-To: markh-n2QNKt385d+sTnJN9+BGXg@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20160120154658.GH18805-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Joerg Roedel Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: iommu@lists.linux-foundation.org On 01/20/2016 10:46 AM, Joerg Roedel wrote: > On Wed, Jan 20, 2016 at 04:38:23PM +0100, Joerg Roedel wrote: >> On Thu, Jan 14, 2016 at 09:04:08AM -0500, Mark Hounschell wrote: >>> OK, I verified the 2 disks are hanging off the Marvel chips. >>> Here is the dmesg from booting with your patch and the 2 >>> disks not showing up. >> >> Does it boot with iommu=soft? > > Something also worth trying is amd_iommu=fullflush (without iommu=soft). > Would be great if you find the time to test these two parameters and > report back. > > amd_iommu=fullflush does not help. iommu=soft allows it to boot Mark