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Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KV
From: |
Laurent Vivier |
Subject: |
Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV |
Date: |
Thu, 17 Nov 2016 21:22:33 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
On 16/11/2016 15:17, Greg Kurz wrote:
> On Wed, 16 Nov 2016 14:17:47 +0100
> Thomas Huth <address@hidden> wrote:
>
>> On 16.11.2016 13:37, Greg Kurz wrote:
>>> On Wed, 16 Nov 2016 12:24:50 +0000
>>> "Dr. David Alan Gilbert" <address@hidden> wrote:
>>>
>>>> * Greg Kurz (address@hidden) wrote:
>>>>> On Wed, 16 Nov 2016 09:39:31 +0100
>>>>> Thomas Huth <address@hidden> wrote:
>>>>>
>>>>>> The ppc64 postcopy test does not work with KVM-PR, and it is also
>>>>>> causing annoying warning messages when run on a x86 host. So let's
>>>>>> use KVM here only if we know that we're running with KVM-HV (which
>>>>>> automatically also means that we're running on a ppc64 host), and
>>>>>> fall back to TCG otherwise.
>>>>>>
[..]
> The changes to the code look ok and I prefer to spend time chasing the
> KVM PR issue rather than arguing on a comment...
For the problem itself, it seems to appear only after a
BOOK3S_INTERRUPT_SYSCALL interrupt for an KVM_EXIT_PAPR_HCALL
(H_PUT_TERM_CHAR). In this case, KVM has to exit to QEMU to manage the
output. The following interrupt is always an BOOK3S_INTERRUPT_PROGRAM
with an emulation failure.
Laurent
- [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Thomas Huth, 2016/11/16
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Laurent Vivier, 2016/11/16
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Laurent Vivier, 2016/11/16
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Greg Kurz, 2016/11/16
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Dr. David Alan Gilbert, 2016/11/16
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Greg Kurz, 2016/11/16
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Thomas Huth, 2016/11/16
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Greg Kurz, 2016/11/16
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV,
Laurent Vivier <=
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Greg Kurz, 2016/11/18
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Laurent Vivier, 2016/11/18
- Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, David Gibson, 2016/11/16
Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, Greg Kurz, 2016/11/16
Re: [Qemu-ppc] [PATCH] tests/postcopy: Use KVM on ppc64 only if it is KVM-HV, David Gibson, 2016/11/16