On 03.09.14 20:36, Bogdan Purcareata wrote: > On target-ppc, the kvm-openpic memory region is part of the E500-CCSR memory > region. On the kernel side, the MPIC is mapped at the same offset as the > kvm-openpic within the address space. > > When adding the PCI BAR0 memory region, an alias is created to point to the > E500-CCSR memory region. This results in firing the kvm_openpic_region_add > once > more, since kvm-openpic is part of the latter. Only this time, the offset is > wrong - it's part of the PCI memory region. This leads to the in-kernel MPIC > to > be remapped at a wrong address, and thus all traps to the kvm-openpic > address to be emulated in userspace. > > The fix consists in an additional filter in kvm_openpic_region_{add,del} to > consider only addresses matching the start of the kvm-openpic memory region.
If this is true, wouldn't vhost and vfio be broken too? Alex