2015-04-21 13:09+0200, Paolo Bonzini: > > > On 20/04/2015 19:25, Jan Kiszka wrote: > > When hardware supports the g_pat VMCB field, we can use it for emulating > > the PAT configuration that the guest configures by writing to the > > corresponding MSR. > > > > Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx> > > I'm not sure about this. The problem is that, unlike Intel, AMD has no > way for the host to force its PAT value and ignore the guest's. I'm > worried about potential performance problems in the guest. We already set g_pat to 0x0007040600070406ULL in init_vmcb(). This patch uses caching that the guest expects, which might improve performance as well. I think it's a step in right direction even if we somehow optimize cache coherent cases later. -- 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
