On Fri, 2 Jul 2010 20:47:44 +0200 Alexander Graf <agraf@xxxxxxx> wrote: > > On 02.07.2010, at 19:59, Hollis Blanchard wrote: > > > [Resending...] > > > > Please reconcile this with > > http://www.linux-kvm.org/page/PowerPC_Hypercall_ABI, which has been > > discussed in the (admittedly closed) Power.org embedded hypervisor > > working group. Bear in mind that other hypervisors are already > > implementing the documented ABI, so if you have concerns, you should > > probably raise them with that audience... > > We can not use sc with LV=1 because that would break the KVM in > something else case which is KVM's strong point on PPC. The current proposal involves the hypervisor specifying the hcall opcode sequence in the device tree -- to allow either "sc 1" or "sc 0 plus magic GPR" depending on whether you've got the hardware hypervisor feature (hereafter HHV). With HHV, "sc 0 plus magic GPR" just doesn't work, since it won't trap to the hypervisor. "sc 1 plus magic GPR" might be problematic on some non-HHV implementations, especially if you *do* have HHV but the non-HHV hypervisor is running as an HHV guest. -Scott -- 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
