Messages in this thread | | | Date | Wed, 21 Sep 2022 14:39:19 -0700 | From | David Matlack <> | Subject | Re: [V2 PATCH 4/8] KVM: selftests: x86: Precompute the result for is_{intel,amd}_cpu() |
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On Thu, Sep 15, 2022 at 12:04:44AM +0000, Vishal Annapurve wrote: > Cache the vendor CPU type in a global variable so that multiple calls > to is_intel_cpu() do not need to re-execute CPUID. > > Add cpu vendor check in kvm_hypercall() so that it executes correct > vmcall/vmmcall instruction when running on Intel/AMD hosts. This avoids > exit to KVM which anyway tries to patch the instruction according to > the cpu type.
Out of curiousity, why do we want to avoid this exit?
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