Re: [Qemu-ppc] [Qemu-devel] ppc64 not resuming with v2.3.0-rc3

[Mark Cave-Ayland]

On 16/04/15 20:49, Stefan Berger wrote:
>> Hmmmm the fix is correct in that internal MSR variables need to be
>> updated post-restore (as noted in the message above it was the exception
>> prefix variables that weren't updated by having MSR_EP set).
>>
>> Maybe on ppc64 there is another bit similar to MSR_TGPR that needs to be
>> excluded? Alex, any thoughts?
> 
> I want to add that I am running QEMU for ppc64 in emulation mode on a
> x86_64 host. The suspend/resume problem, while in SLOF, did not exist in
> QEMU v2.2, so I anticipate that this is a regression would also be
> visible on QEMU on kvm, though a simple test on such a machine may show
> different...
> 
> Removing the patch solves the problem while in SLOF. Once booting into
> Linux suspend/resume does not work - with qemu-system-ppc64 on x86_64
> host. Timestamps shown by Linux actually make a jump backwards and
> ultimately Linux hangs.

Just to clarify the terminology here, when you say suspend/resume are
you talking about a hardware suspend/resume or issuing a savevm/loadvm
sequence in the QEMU monitor? Are you able to provide further detail to
reproduce your test case?


ATB,

Mark.