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0b368a10c7
Certain PMU-related MSRs are not supported for CPUs with PMU architecture below version 2. KVM rejects any access to them (see intel_is_valid_msr_idx routine in KVM), and QEMU fails on the following assertion: kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed. QEMU also could fail if KVM exposes less fixed counters then 3. It could happen if host system run inside another hypervisor, which is tweaking PMU-related CPUID. To prevent possible fail, number of fixed counters now is obtained in the same way as number of GP counters. Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> Signed-off-by: Jan Dakinevich <jan.dakinevich@virtuozzo.com> Message-Id: <1514383466-7257-1-git-send-email-jan.dakinevich@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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