On Wed, Jul 05, 2017 at 10:49:52AM +0200, Greg Kurz wrote: > When running KVM on POWER, we allow the user to pass "-cpu POWERx" instead > of "-cpu host". This is achieved by patching the ppc_cpu_aliases[] array > so that "POWERx" points to the CPU class with the same PVR as the host CPU. > This causes CPUs to be instantiated from this CPU class instead of the > TYPE_HOST_POWERPC_CPU class which is used with "-cpu host". These CPUs thus > miss all the KVM specific tuning from kvmppc_host_cpu_class_init(). > > This currently causes QEMU with "-cpu POWER9" to fail when running KVM on a > POWER9 DD1 host: > > qemu-system-ppc64: Register sync failed... If you're using kvm-hv.ko, only > "-cpu host" is possible > kvm_init_vcpu failed: Invalid argument > > Let's have the "POWERx" alias to point to TYPE_HOST_POWERPC_CPU directly, > so that "-cpu POWERx" instantiates CPUs from the same class as "-cpu host". > > Signed-off-by: Greg Kurz <gr...@kaod.org>
Nice. I had mistakenly thought it already did that.
I've applied this to ppc-for-2.10.
Just to make sure I've understood, this obsoletes Laurent's earlier
patches moving DD1 workarounds about, yes?
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David Gibson | I'll have my music baroque, and my code
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