On Wed, Feb 13, 2013 at 02:35:49PM +0100, Borislav Petkov wrote: > On Wed, Feb 13, 2013 at 02:10:02PM +0200, Gleb Natapov wrote: > > > > Is your guest compiled without PV support? With PV Linux traps #GP for > > > > all MSRs and it saves us in more than one places. > > > > > > Yes, CONFIG_PARAVIRT_GUEST is not set on the guest kernel. > > > > > Thanks. It does not mean that the patch should not be applied though. > > Right, > > but, come to think of it, adding an MSR each time to those functions > could turn out to be a PITA. The PV solution with trapping on the MSR > accesses might be better so maybe CONFIG_KVM should do > PV solution does not exists for some other guests.
> select KVM_GUEST > > ? I can easily imaging the situation where one whats to build different kernels for host and guest and do not have PV in the host one. > > This is even a good forward-looking solution. > > > I cannot seems to find the documentation for the MSR anywhere, do you > > have a pointer? > > http://support.amd.com/us/Processor_TechDocs/31116.pdf, p.438 > Thanks, -- Gleb. -- 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/
