Messages in this thread | | | From | "Van De Ven, Arjan" <> | Subject | RE: [PATCH 2/2] x86/speculation: Support "Enhanced IBRS" on future CPUs | Date | Tue, 20 Feb 2018 14:08:26 +0000 |
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> >> For bonus points: What should happen to a VM that is live migrated > >> from one hypervisor to another, and the hypervisors have different > >> IBRS support? > > > > Doctor Doctor it hurts when I do this.... > > > > Migration tends to only work between HV's that are relatively > > homogeneous, that's nothing new... > > No Arjan, this is just wrong. Well, I suppose it's right in the present > tense with the IBRS mess on Skylake, but it's _not_ been true until last > year.
I meant software wise. You're not going to live migrate from xen to kvm or backwards. or between very radically different versions of the kvm stack.
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