| Date | Sun, 11 Feb 2018 11:19:24 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH v2 5/6] KVM/nVMX: Set the CPU_BASED_USE_MSR_BITMAPS if we have a valid L02 MSR bitmap |
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* David Woodhouse <dwmw@amazon.co.uk> wrote:
> From: KarimAllah Ahmed <karahmed@amazon.de> > > We either clear the CPU_BASED_USE_MSR_BITMAPS and end up intercepting all > MSR accesses or create a valid L02 MSR bitmap and use that. This decision > has to be made every time we evaluate whether we are going to generate the > L02 MSR bitmap. > > Before commit 086e7d4118cc ("KVM: VMX: Allow direct access to MSR_IA32_SPEC_CTRL") > this was probably OK since the decision was always identical. This is no > longer the case now since the MSR bitmap might actually change once we > decide to not intercept SPEC_CTRL and PRED_CMD.
Note, I fixed the changelog to refer to the correct upstream SHA1, which is:
d28b387fb74d: KVM/VMX: Allow direct access to MSR_IA32_SPEC_CTRL
Thanks,
Ingo
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