On Wed, Feb 13, 2013 at 12:55:26PM +0100, Borislav Petkov wrote: > On Wed, Feb 13, 2013 at 01:47:47PM +0200, Gleb Natapov wrote: > > On Wed, Feb 13, 2013 at 12:42:41PM +0100, Borislav Petkov wrote: > > > From: Borislav Petkov <bp@xxxxxxx> > > > > > > The "x86, AMD: Enable WC+ memory type on family 10 processors" patch > > > currently in -tip added a workaround for AMD F10h CPUs which #GPs my > > > guest when booted in kvm. This is because it accesses MSR_AMD64_BU_CFG2 > > > which is not currently ignored by kvm. Do that because this MSR is only > > > baremetal-relevant anyway. While at it, move the ignored MSRs at the > > > beginning of kvm_set_msr_common so that we exit then and there. > > > > > 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. I cannot seems to find the documentation for the MSR anywhere, do you have a pointer? -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
