Re: AMD-Vi issue

From: Elliott Mitchell <ehem+xen@m5p.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: xen-devel@lists.xenproject.org, Jan Beulich <jbeulich@suse.com>
Subject: Re: AMD-Vi issue
Date: Mon, 4 Mar 2024 16:34:03 -0800	[thread overview]
Message-ID: <ZeZoe2FJQMHaiCz0@mattapan.m5p.com> (raw)
In-Reply-To: <f3cbf20c-f591-4aec-bbe3-ef0efa24c42d@citrix.com>

On Mon, Mar 04, 2024 at 11:55:07PM +0000, Andrew Cooper wrote:
> On 25/01/2024 8:24 pm, Elliott Mitchell wrote:
> > The original observation features MD-RAID1 using a pair of Samsung
> > SATA-attached flash devices.  The main line shows up in `xl dmesg`:
> >
> > (XEN) AMD-Vi: IO_PAGE_FAULT: DDDD:bb:dd.f d0 addr ffffff???????000 flags 0x8 I
> 
> You have a device which is issuing interrupts which have been blocked
> due to the IOMMU configuration.
> 
> But you've elided all details other than the fact it's assigned to
> dom0.  As such, there is nothing we can do to help.

I've provided the details thought most likely to allow others to
reproduce.  I've pointed to a report from someone else with somewhat
similar hardware who also encountered this (and had enough hardware to
try several combinations).

Sorry about being reluctant to send exact hardware serial numbers to a
public mailing list.

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