* Error upgrading vm from windows 8 to 8.1
@ 2015-03-27 20:14 coreys
2015-03-27 20:54 ` Bandan Das
0 siblings, 1 reply; 2+ messages in thread
From: coreys @ 2015-03-27 20:14 UTC (permalink / raw)
To: kvm
When I try to upgrade my guest windows 8 vm to window 8.1. I get the
error of processor doesn't support CompareExchange128. Haven not been
able to find any information about this error.
--
Corey W. Scherr
Affinity Global Solutions
812 Burlington Dr, STE 300
coreys@affinitygs.com
701-223-3565, ext. 31
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Error upgrading vm from windows 8 to 8.1
2015-03-27 20:14 Error upgrading vm from windows 8 to 8.1 coreys
@ 2015-03-27 20:54 ` Bandan Das
0 siblings, 0 replies; 2+ messages in thread
From: Bandan Das @ 2015-03-27 20:54 UTC (permalink / raw)
To: coreys; +Cc: kvm
coreys <coreys@affinitygs.com> writes:
> When I try to upgrade my guest windows 8 vm to window 8.1. I get the
> error of processor doesn't support CompareExchange128. Haven not been
> able to find any information about this error.
I think that's because cmpxchg16b is not emulated yet:
static int em_cmpxchg8b(struct x86_emulate_ctxt *ctxt)
{
u64 old = ctxt->dst.orig_val64;
if (ctxt->dst.bytes == 16)
return X86EMUL_UNHANDLEABLE;
...
^ permalink raw reply [flat|nested] 2+ messages in thread
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