On Mon, Jan 16, 2017 at 11:40:28AM +0000, Andrew Cooper wrote: > libxc performs a lot of calculations for the xstate leaf when generating a > guests cpuid policy. To correctly construct a policy for an HVM guest, this > logic depends on native cpuid leaking through from real hardware. > > In particular, the logic is potentially wrong for an HVM-based toolstack > domain (e.g. PVH dom0), and definitely wrong if cpuid faulting is applied to a > PV domain. > > Xen now performs all the necessary calculations, using native values. The > only piece of information the toolstack need worry about is single xstate > feature leaf. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com> > --- > CC: Jan Beulich <jbeul...@suse.com> > CC: Ian Jackson <ian.jack...@eu.citrix.com> > CC: Wei Liu <wei.l...@citrix.com>
Acked-by: Wei Liu <wei.l...@citrix.com> > --- > tools/libxc/xc_cpuid_x86.c | 143 > +++++---------------------------------------- > 1 file changed, 15 insertions(+), 128 deletions(-) > I like this diffstat. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
