On 26/08/2015 20:54, Paul Mackerras wrote: > On Wed, Aug 26, 2015 at 11:34:26AM +0200, Alexander Graf wrote: >> >> >> On 13.08.15 03:15, David Gibson wrote: >>> ec53500f "kvm: Add VFIO device" added a special KVM pseudo-device which is >>> used to handle any necessary interactions between KVM and VFIO. >>> >>> Currently that device is built on x86 and ARM, but not powerpc, although >>> powerpc does support both KVM and VFIO. This makes things awkward in >>> userspace >>> >>> Currently qemu prints an alarming error message if you attempt to use VFIO >>> and it can't initialize the KVM VFIO device. We don't want to remove the >>> warning, because lack of the KVM VFIO device could mean coherency problems >>> on x86. On powerpc, however, the error is harmless but looks disturbing, >>> and a test based on host architecture in qemu would be ugly, and break if >>> we do need the KVM VFIO device for something important in future. >>> >>> There's nothing preventing the KVM VFIO device from being built for >>> powerpc, so this patch turns it on. It won't actually do anything, since >>> we don't define any of the arch_*() hooks, but it will make qemu happy and >>> we can extend it in future if we need to. >>> >>> Signed-off-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx> >>> Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx> >> >> Paul is going to take care of the kvm-ppc tree for 4.3. Also, ppc kvm >> patches should get CC on the kvm-ppc@vger mailing list ;). >> >> Paul, could you please pick this one up? > > Sure, I'll do that once I get home (end of this week). This was not in the 4.3 pull request, but I think we can apply it after the end of the merge window. Paolo -- 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
