From: Jan Beulich <jbeulich@suse.com>
To: "Roger Pau Monné" <roger.pau@citrix.com>
Cc: Juergen Gross <jgross@suse.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Roman Shaposhnik <roman@zededa.com>,
Paul Durrant <Paul.Durrant@citrix.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
"boris.ostrovsky@oracle.com" <boris.ostrovsky@oracle.com>
Subject: Re: [Xen-devel] [BUG] After upgrade to Xen 4.12.0 iommu=no-igfx
Date: Wed, 7 Aug 2019 10:31:40 +0200 [thread overview]
Message-ID: <8a68c4c0-4f50-4e04-786c-7426fdc10db9@suse.com> (raw)
In-Reply-To: <20190807073534.7uoqo7q7gno2ljyl@Air-de-Roger>
On 07.08.2019 09:35, Roger Pau Monné wrote:
> On Tue, Aug 06, 2019 at 02:48:51PM -0700, Roman Shaposhnik wrote:
>> On Tue, Aug 6, 2019 at 9:18 AM Roger Pau Monné <roger.pau@citrix.com> wrote:
>>>
>>> On Fri, Aug 02, 2019 at 10:05:40AM +0200, Roger Pau Monné wrote:
>>>> On Thu, Aug 01, 2019 at 11:25:04AM -0700, Roman Shaposhnik wrote:
>>>>> This patch completely fixes the problem for me!
>>>>>
>>>>> Thanks Roger! I'd love to see this in Xen 4.13
>>>>
>>>> Thanks for testing!
>>>>
>>>> It's still not clear to me why the previous approach didn't work, but
>>>> I think this patch is better because it removes the usage of
>>>> {set/clear}_identity_p2m_entry from PV domains. I will submit this
>>>> formally now.
>>>
>>> Sorry to bother again, but since we still don't understand why the
>>> previous fix didn't work for you, and I can't reproduce this with my
>>> hardware, could you give the attached patch a try?
>>
>> No worries -- and thanks for helping to get it over the finish line --
>> this is much appreciated!
>>
>> I'm happy to say that this latest patch is also working just fine. So
>> I guess this is the one that's going to land in Xen 4.13?
>
> No, not really, sorry this was still a debug patch.
>
> So I think the behaviour you are seeing can only be explained if the
> IOMMU is already enabled by the firmware when booting into Xen, can
> this be the case?
Even then - why would the existing flush not suffice in this case?
Jan
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next prev parent reply other threads:[~2019-08-07 8:32 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-19 19:31 [Xen-devel] [BUG] After upgrade to Xen 4.12.0 iommu=no-igfx Roman Shaposhnik
2019-07-19 20:02 ` Roman Shaposhnik
2019-07-22 8:20 ` Paul Durrant
2019-07-22 11:48 ` Roger Pau Monné
2019-07-22 11:54 ` Paul Durrant
2019-07-22 13:48 ` Roger Pau Monné
2019-07-22 14:03 ` Paul Durrant
2019-07-22 14:39 ` Roger Pau Monné
2019-07-22 15:02 ` Paul Durrant
2019-07-22 15:21 ` Roger Pau Monné
2019-07-22 23:36 ` Roman Shaposhnik
2019-07-22 23:47 ` Andrew Cooper
2019-07-23 17:32 ` Roman Shaposhnik
2019-07-23 17:35 ` Andrew Cooper
2019-07-23 17:48 ` Roman Shaposhnik
2019-07-23 17:50 ` Andrew Cooper
2019-07-23 17:58 ` Roman Shaposhnik
2019-07-23 18:12 ` Andrew Cooper
2019-07-23 18:25 ` Roman Shaposhnik
2019-07-26 7:58 ` Jan Beulich
2019-07-30 17:56 ` Roman Shaposhnik
2019-07-31 8:34 ` Jan Beulich
2019-07-31 8:58 ` Andrew Cooper
2019-07-31 9:30 ` Jan Beulich
2019-07-31 19:37 ` Roman Shaposhnik
2019-07-24 12:00 ` Jan Beulich
2019-07-24 12:04 ` Jan Beulich
2019-07-24 11:23 ` Andrew Cooper
2019-07-24 11:40 ` Andrew Cooper
2019-07-24 14:11 ` Roger Pau Monné
2019-07-26 0:47 ` Roman Shaposhnik
2019-07-26 9:35 ` Roger Pau Monné
2019-07-30 9:21 ` Roger Pau Monné
2019-07-30 17:55 ` Roman Shaposhnik
2019-07-31 8:31 ` Jan Beulich
2019-07-31 8:36 ` Roger Pau Monné
2019-07-31 8:43 ` Roger Pau Monné
2019-07-31 19:35 ` Roman Shaposhnik
2019-07-31 19:46 ` Andrew Cooper
2019-07-31 21:03 ` Roman Shaposhnik
2019-08-01 8:15 ` Roger Pau Monné
2019-08-01 18:25 ` Roman Shaposhnik
2019-08-02 8:05 ` Roger Pau Monné
2019-08-06 16:17 ` Roger Pau Monné
2019-08-06 21:48 ` Roman Shaposhnik
2019-08-07 7:08 ` Jan Beulich
2019-08-07 9:57 ` Roger Pau Monné
2019-08-07 10:03 ` Jan Beulich
2019-08-07 7:35 ` Roger Pau Monné
2019-08-07 8:31 ` Jan Beulich [this message]
2019-08-07 10:17 ` Roger Pau Monné
2019-08-12 8:57 ` Roger Pau Monné
2019-08-13 19:24 ` Roman Shaposhnik
2019-08-14 8:06 ` Roger Pau Monné
2019-08-19 5:00 ` Roman Shaposhnik
2019-08-19 8:16 ` Roger Pau Monné
2019-08-20 2:03 ` Roman Shaposhnik
2019-08-01 7:35 ` Jan Beulich
2019-07-31 19:30 ` Roman Shaposhnik
2019-08-01 8:45 ` Roger Pau Monné
2019-08-01 18:19 ` Roman Shaposhnik
2019-07-20 16:39 ` Andrew Cooper
2019-07-22 8:03 ` Paul Durrant
2019-07-24 17:42 ` Rich Persaud
2019-07-26 1:13 ` Roman Shaposhnik
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