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Re: [PATCH] target/i386: add VMX features to named CPU models
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From: |
Paolo Bonzini |
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Subject: |
Re: [PATCH] target/i386: add VMX features to named CPU models |
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Date: |
Wed, 20 Nov 2019 23:14:42 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 |
On 20/11/19 22:15, Eduardo Habkost wrote:
>
> For how long was this broken? Jiri, was libvirt including +vmx
> in mode=host-model for a long time, or is this something recent?
Could that be related to making nested=1 the default in the kernel? KVM has
static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2
*entry)
{
if (func == 1 && nested)
entry->ecx |= bit(X86_FEATURE_VMX);
}
which would date the change to Linux 4.20 (December 2018).
Paolo