Re: [Xen-devel] Xen fails to boot inside QEMU on x86, no VMX

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 23 Jan 2018, Andrew Cooper wrote:
> On 22/01/2018 23:48, Stefano Stabellini wrote:
> > Hi all,
> >
> > Running Xen inside QEMU x86 without KVM acceleartion and without VMX
> > emulation leads to the failure appended below.
> >
> > This trivial workaround "fixes" the problem:
> >
> > diff --git a/xen/arch/x86/extable.c b/xen/arch/x86/extable.c
> > index 72f30d9..a67d6c1 100644
> > --- a/xen/arch/x86/extable.c
> > +++ b/xen/arch/x86/extable.c
> > @@ -168,7 +168,6 @@ static int __init stub_selftest(void)
> >                         _ASM_EXTABLE(.Lret%=, .Lfix%=)
> >                         : [exn] "+m" (res)
> >                         : [stb] "r" (addr), "a" (tests[i].rax));
> > -        ASSERT(res == tests[i].res.raw);
> >      }
> >  
> >      return 0;
> >
> >
> > Any suggestions?
> 
> Which i failed?  This will probably be an emulation bug in Qemu.

i=2 is the culprit

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