From: Thomas Huth <thuth@redhat.com>
To: Greg Harmon <gharm@google.com>
Cc: kvm@vger.kernel.org
Subject: Re: [kvm-unit-tests PATCH] powerpc: Add SPRs migration test
Date: Tue, 19 Apr 2016 10:20:31 +0200 [thread overview]
Message-ID: <5715EA4F.4010206@redhat.com> (raw)
In-Reply-To: <CABFC-fPJXFJwDjw46dkGbYyCkVhQ6LTHeCSU0Yqgtbva3GBsPQ@mail.gmail.com>
On 14.04.2016 18:43, Greg Harmon wrote:
> On Thu, Apr 14, 2016 at 1:18 AM, Thomas Huth <thuth@redhat.com> wrote:
>> On 12.04.2016 23:32, Greg Harmon wrote:
>>> David Gibson <dgibson <at> redhat.com> writes:
>>>> On Mon, 11 Apr 2016 11:23:46 +0200
>>>> Thomas Huth <thuth <at> redhat.com> wrote:
>>>>> On 11.04.2016 03:55, David Gibson wrote:
>>>>>> On Fri, 8 Apr 2016 13:35:29 +0200
>>>>>> Thomas Huth <thuth <at> redhat.com> wrote:
>>>>>>
>>>>>>> This test can be used to check whether the SPR (special purpose
>>>>>>> registers) of the PowerPC CPU are migrated right. It first fills
>>>>>>> the various SPRs with some non-zero value, then reads the values
>>>>>>> back into a first array, then waits for a key (with the '-w' option)
>>>>>>> so that it is possible to migrate the VM, and finally reads the
>>>>>>> values from the SPRs back into another array and then compares it
>>>>>>> with the initial values.
>>>
>>> Hi,
>>> In order to make this test automated, what if we extend the test device to
>>> return a save/restore generation number? It can report that in a
>>> register,and then the test can spin, waiting for that value to increase.
>>
>> The test device only works on x86, as far as I know, so I'm afraid it's
>> not usable for this case here on PowerPC.
>
> That's too bad that test device doesn't run on PowerPC. I'll try to
> send a patch sometime to add this type of register to the test device.
By the way, for x86, there is already such a mechanism specified, see:
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg05600.html
... seems like it has just not been merged yet.
Thomas
prev parent reply other threads:[~2016-04-19 8:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-08 11:35 [kvm-unit-tests PATCH] powerpc: Add SPRs migration test Thomas Huth
2016-04-08 12:14 ` Andrew Jones
2016-04-08 14:08 ` Thomas Huth
2016-04-08 15:20 ` Andrew Jones
2016-04-11 1:55 ` David Gibson
2016-04-11 9:23 ` Thomas Huth
2016-04-12 1:21 ` David Gibson
2016-04-12 21:32 ` Greg Harmon
2016-04-14 8:18 ` Thomas Huth
2016-04-14 16:43 ` Greg Harmon
2016-04-15 8:43 ` Andrew Jones
2016-04-19 8:20 ` Thomas Huth [this message]
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