Messages in this thread | | | Subject | Re: [PATCH v11 7/9] KVM: X86: Add userspace access interface for CET MSRs | From | Paolo Bonzini <> | Date | Mon, 27 Apr 2020 16:04:28 +0200 |
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On 26/04/20 17:23, Yang Weijiang wrote: > What's the purpose of the selftest? Is it just for Shadow Stack SSP > state transitions in various cases? e.g., L0 SSP<--->L3 SSP, > L0 SSP1<--->L0 SSP2?
No, it checks that the whole state can be extracted and restored from a running VM. For example, it would have caught immediately that the current SSP could not be saved and restored.
> We now have the KVM unit-test for CET functionalities, > i.e., Shadow Stack and Indirect Branch Tracking for user-mode, I can put the > state test app into the todo list as current patchset is mainly for user-mode > protection, the supervisor-mode CET protection is the next step.
What are the limitations? Or are you referring to the unit test?
Paolo
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