[Qemu-devel] [PATCH] i386/cpu/kvm: look at PMU's CPUID before setting MSRs

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

Re: [Qemu-devel] [PATCH] i386/cpu/kvm: look at PMU's CPUID before setting MSRs

On Wed, Dec 27, 2017 at 05:04:26PM +0300, Jan Dakinevich wrote: > 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_ms