On Wed, Jul 2, 2014 at 2:14 PM, <kan.liang@xxxxxxxxx> wrote: > From: Kan Liang <kan.liang@xxxxxxxxx> > > x86, perf: Protect LBR and offcore rsp against KVM lying > > With -cpu host, KVM reports LBR and offcore support, if the host has support. > When the guest perf driver tries to access LBR or offcore_rsp MSR, > it #GPs all MSR accesses,since KVM doesn't handle LBR and offcore support. > So check the related MSRs access right once at initialization time to avoid the error access at runtime. > > For reproducing the issue, please build the kernel with CONFIG_KVM_INTEL = y. This is for host kernel, > And CONFIG_PARAVIRT = n and CONFIG_KVM_GUEST = n. And this is for guest kernel, right? -Jidong -- 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
