On 28/06/17 07:09, Jan Beulich wrote: >>>> Marek Marczykowski-Górecki <marma...@invisiblethingslab.com> 06/28/17 3:09 >>>> AM >>> >> It's bit 9 not 10 (which is ibs). > Indeed, but shouldn't it rather be removed? We don't expose it from the > hypervisor at all anymore: > > XEN_CPUFEATURE(OSVW, 3*32+ 9) /* OS Visible Workaround */ > > (note the absence of any marker character immediately inside the comment).
I don't believe we have ever actually offered OSVW to guests, despite the pretence of being able to. ISTR it was always clobbered before being given to a guest. Having said that, we should be advertising OSVW. It's entire purpose is to tell the OS that there is something it can do to manually work round a specific erratum. OTOH, making this migrate safe is liable to be very complicated... ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
