This patch is also needed for kernels before 4.18
cd28325249 KVM: VMX: support MSR_IA32_ARCH_CAPABILITIES as a feature
MSR ( 25-6-18)
This patchset populates the structure in arch/x86/kvm/x86.c:
msr_based_features{}
With out this patch, qemu asserts at
kvm_get_supported_feature_msrs(KVMState *s):
assert(msr_list.nmsrs > 0);
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https://bugs.launchpad.net/bugs/1828495
Title:
[KVM][CLX] CPUID_7_0_EDX_ARCH_CAPABILITIES is not enabled in VM.
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