[PULL][Artful] Fix KVM hang on ThunderX systems

[dann frazier]

On Mon, Jul 24, 2017 at 10:06 AM, Seth Forshee
<seth.forshee at canonical.com> wrote:
> On Thu, Jul 20, 2017 at 03:54:46PM -0600, dann frazier wrote:
>> BugLink: https://bugs.launchpad.net/bugs/1673564
>>
>> There's a pretty nasty errata for ThunderX SoCs in which a guest can
>> cause interrupts to be disabled on the host kernel. The symptoms vary,
>> but it's easy to reproduce running a bunch of parallel VM start/stop
>> loops.
>>
>> There was quite a bit of backporting required for the patches in this
>> series. For such patches, I've described the changes required in a
>> comment above my S-o-B. They are mostly mechanical transformations to
>> revert macro cleanups that occurred post-4.11.
>>
>> This survived an overnight run of my parallel VM start/stop test on a
>> CRB1S, whereas an unpatched system would fail in just a few minutes.
>>
>> I created this backport as a stepping stone towards 4.10. While I
>> suspect artful's days of 4.11 are quickly coming to an end, I figured
>> I might as well submit it since I have it. Note that while this
>> backport cherry-picks cleanly back to Ubuntu's 4.10, it isn't
>> compatible - by which I mean, KVM crashes immediately. Diagnosing that
>> is my next step.
>>
>> The following changes since commit bfdccafa8f542c8f9740a64ecb110e4982e336c0:
>>
>>   platform/x86: thinkpad_acpi: add mapping for new hotkeys (2017-07-20
>> 14:50:48 -0500)
>>
>> are available in the git repository at:
>>
>>   git://git.launchpad.net/~dannf/ubuntu/+source/linux/+git/linux
>> lp1673564-artful
>>
>> for you to fetch changes up to 08ecebdce871761059927c93adcb3cb90da2680e:
>>
>>   KVM: arm64: Log an error if trapping a write-to-read-only GICv3
>> access (2017-07-20 15:31:07 -0600)
>
> Quick question. When I fetched your tree I noticed a lp1673564-unstable
> branch as well. Is that one ready to go for unstable?

Yeah - in fact, you already pulled it :)
https://lists.ubuntu.com/archives/kernel-team/2017-July/085621.html

 -dann