On Wed, Apr 17, 2013 at 12:10:01PM +0300, Victor Miasnikov wrote: > Question is very simple: Hyper-V users/sysadmins need wait patch a-la this: > > == > KVM emulates Hyper-V to host enlightened Windows. Looks like this > emulation may be turned on by default even for Linux guests. Check and > fail Hyper-V detection if we are on KVM.
> [ hpa: the problem here is that KVM doesn't emulate Hyper-V well > enough, and if the KVM support isn't compiled in, we end up stubling > over the Hyper-V emulation and try to activate it -- and it fails. ] > > . . . What's emulated not well enough? > + /* > + * KVM emulates Hyper-V to support enlightened Windows. > + * Check to see first if we are on a KVM Hypervisor. > + */ If the hypervisor says it's Hyper-V, that's because it wants guests to use Hyper-V. I don't see why is guest second-guessing this a good idea. > + if (KVM_cpuid_base()) > + return false; > + > == > > > Or "KVM emulates Hyper-V" as "Hyper-V emulates Hyper-V" ? > > > Best regards, Victor Miasnikov > Blog: http://vvm.blog.tut.by/ > > P.S. No. You are using Hyper-V, not the KVM emulation of it. No patches dealing with this emulation should have any effect on you. -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
