We dropped support in KVM for mixing MMU modes in machines that have old POWER9 processors which don't support mixing. As usual I forgot that compat mode exists:
$ lscpu | grep pvr Model: 2.1 (pvr 004e 1201) $ ~/qemu-system-ppc64 -machine pseries,accel=kvm,max-cpu-compat=power8 ... error: kvm run failed Invalid argument NIP 0000000000000100 LR 0000000000000000 CTR 0000000000000000 XER 0000000000000000 CPU#0 MSR 8000000000001000 HID0 0000000000000000 HF 8000000000000000 iidx 3 didx 3 TB 00000000 00000000 DECR 0 GPR00 0000000000000000 0000000000000000 0000000000000000 000000007ff00000 GPR04 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR08 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR12 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR16 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR24 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR28 0000000000000000 0000000000000000 0000000000000000 0000000000000000 CR 00000000 [ - - - - - - - - ] RES ffffffffffffffff SRR0 0000000000000000 SRR1 0000000000000000 PVR 00000000004e1201 VRSAVE 0000000000000000 SPRG0 0000000000000000 SPRG1 0000000000000000 SPRG2 0000000000000000 SPRG3 0000000000000000 SPRG4 0000000000000000 SPRG5 0000000000000000 SPRG6 0000000000000000 SPRG7 0000000000000000 HSRR0 0000000000000000 HSRR1 0000000000000000 CFAR 0000000000000000 LPCR 000000000004f01f PTCR 0000000000000000 DAR 0000000000000000 DSISR 0000000000000000 This series reuses some code we already have to abort and print a proper message if the chosen MMU mode is not supported by the host. Fabiano Rosas (2): hw/ppc/spapr.c: Extract MMU mode error reporting into a function hw/ppc/spapr.c: Make sure the host supports the selected MMU mode hw/ppc/spapr.c | 17 +++++++++++++++++ hw/ppc/spapr_hcall.c | 14 ++------------ include/hw/ppc/spapr.h | 1 + 3 files changed, 20 insertions(+), 12 deletions(-) -- 2.29.2
