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 00:00:23 +0000 |
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> On Mon, 19 Feb 2018 23:42:24 +0000, "Van De Ven, Arjan" said: > > > the guest is not the problem; guests obviously will already honor if Enhanced > > IBRS is enumerated. The problem is mixed migration pools where the > hypervisor > > may need to decide to not pass this enumeration through to the guest. > > 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... folks who run clouds or bigger pools know this obviously.
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