On 07/10/13 07:16, Gavin Guo wrote: > On Sun, Oct 6, 2013 at 10:56 PM, Peter Maydell <peter.maydell@xxxxxxxxxx > <mailto:peter.maydell@xxxxxxxxxx>> wrote: > > On 6 October 2013 23:03, Gavin Guo <gavin.guo@xxxxxxxxxxxxx > <mailto:gavin.guo@xxxxxxxxxxxxx>> wrote: > > Does it mean the currently qemu can't support A15 vcpu running on > host A7? > > No, that's a kernel restriction. That is why the patch description > reads: > # This patch adds support for running Cortex-A7 guests on Cortex-A7 > hosts. > > (What QEMU is currently missing is A7 support, so you can't ask it to > run an A7 guest CPU.) > > -- PMM > > > Thanks, I saw the checking in the kvm_vcpu_set_target(). I'm confused > that what is the concern to run the same cpu type? Does it matter to run > A15 on A7 or inverse? It does. MIDR registers are different. Cache size is different. It may work, or it may not. And at the very least, you should present a consistent view of the underlying system to the unsuspecting OS. M. -- Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
