On Fri, Sep 19, 2014 at 10:08:20AM -0700, H. Peter Anvin wrote: > On 09/19/2014 09:53 AM, Gleb Natapov wrote: > > On Fri, Sep 19, 2014 at 09:40:07AM -0700, H. Peter Anvin wrote: > >> On 09/19/2014 09:37 AM, Gleb Natapov wrote: > >>> > >>> Linux detects what hypervior it runs on very early > >> > >> Not anywhere close to early enough. We're talking for uses like kASLR. > >> > > Still to early to do: > > > > h = cpuid(HYPERVIOR_SIGNATURE) > > if (h == KVMKVMKVM) { > > if (cpuid(kvm_features) & kvm_rnd) > > rdmsr(kvm_rnd) > > else (h == HyperV) { > > if (cpuid(hv_features) & hv_rnd) > > rdmsr(hv_rnd) > > else (h == XenXenXen) { > > if (cpuid(xen_features) & xen_rnd) > > rdmsr(xen_rnd) > > } > > > > If we need to do chase loops, especially not so... > What loops exactly? As a non native English speaker I fail to understand if your answer is "yes" or "no" ;)
-- Gleb. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization