On 16/02/2018 17:29, Jim Mattson wrote: > On Fri, Feb 16, 2018 at 6:18 AM, Paolo Bonzini <pbonz...@redhat.com> wrote: > >> Uhm, taking contents from the hardware is wrong (guess why---live >> migration). I'll send a revert of those two lines. > > Hardware seems like a reasonable place to get the default value (cf. > the VMX capability MSRs).
There are some differences: - a zero value for ARCH_CAPABILITIES should be safe, while a zero value for VMX capabilities doesn't really make sense. On the contrary, a nonzero value for ARCH_CAPABILITIES is not safe across live migration. - VMX doesn't support live migration; before adding that support we will probably have Tom's patches to retrieve MSR capabilities. Thanks, Paolo > Should these two lines just be moved to > vmx_create_cpu? >