Messages in this thread | | | Subject | Re: [PATCH v2 1/3] KVM: x86: add support for user wait instructions | From | Paolo Bonzini <> | Date | Wed, 29 May 2019 03:25:39 +0200 |
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On 27/05/19 12:30, Peter Zijlstra wrote: >> This patch adds support for UMONITOR, UMWAIT and TPAUSE instructions >> in kvm, and by default dont't expose it to kvm and provide a capability >> to enable it. > > I'm thinking this should be conditional on the guest being a 1:1 guest, > and I also seem to remember we have bits for that already -- they were > used to disable paravirt spinlocks for example.
This should be userspace's choice. It would indeed be silly to enable this while overcommitted, but KVM doesn't really care.
Paolo
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