|
From: | Wayne Li |
Subject: | Re: QEMU VM crashes when enabling KVM |
Date: | Thu, 12 Dec 2019 10:40:44 -0600 |
On 12/12/19 02:59, Wayne Li wrote:
> We wrote a project that is created on top of the QEMU source code; it
> calls functions from the QEMU code. I run the executable created by
> compiling that project/QEMU code. Anyway, looking at the following
> documentation:
>
> https://www.kernel.org/doc/Documentation/powerpc/cpu_families.txt
>
> It looks like the PowerPC 7457 is Book3S and the PowerPC e6500 is
> BookE. Is that why you think I require a Book3S KVM? Exactly why do
> you feel this way? Also would that mean my team would need to go and
> buy a board with a Book3S processor?
CCing the PPC maintainer. There are aspects of BookE and Book3S that
are different and not really interchangeable in the privileged interface.
Paolo
> -Thanks!, Wayne Li
>
> From my understanding
>
> On Wed, Dec 11, 2019 at 7:16 PM Paolo Bonzini <address@hidden
> <mailto:address@hidden>> wrote:
>
> On 11/12/19 22:23, Wayne Li wrote:
> >
> > Now I am fairly sure KVM is actually enabled on the system. Finding
> > that out was another story that spanned a couple of months. But long
> > story short, lsmod doesn't show that the KVM kernel module is
> running.
> > But that's because KVM is built-in and it can't actually be built as a
> > loadable kernel module in this particular system.
> >
> > So I'm not really sure what could be the problem. Though I was
> thinking
> > if I understood the error better that might help? Following the
> code I
> > see that the "Missing PVR setting capability." is called when a
> variable
> > called "cap_segstate" is 0:
> >
> > if (!cap_segstate) {
> > fprintf(stderr, "kvm error: missing PVR setting
> capability\n");
> > return -ENOSYS;
> > }
> >
> > And the cap_segstate variable is set by the following function:
> >
> > cap_segstate = kvm_check_extension(s, KVM_CAP_PPC_SEGSTATE);
>
> You are not saying how you are running QEMU. I think you are using a
> CPU model that requires a Book3S KVM.
>
> Paolo
>
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