Re: [Qemu-devel] [PATCH v4 2/3] target-i386: add migration support for Intel LMCE

[Paolo Bonzini]

On 20/06/2016 04:11, Haozhong Zhang wrote:
>>> > > Does that mean we can automatically enable LMCE for "-cpu host"?
>> > 
>> > We can automatically enable LMCE for "-cpu host" if and only if
>> > the host kernel supports LMCE.
>> >
> According to our discussion for KVM Patch 3, we may have to disable it
> by default by -cpu host, so that pc-2.7 will not require new kernels
> unless LMCE is required explicitly by users.

-cpu host is a bit special, it requires the same processor and kernel on
both sides of a migration.  So it can enable LMCE.

Paolo