On 11/12/18 1:42 PM, Peter Maydell wrote: > Adding the following change allowed me to boot: > > diff --git a/target/arm/kvm32.c b/target/arm/kvm32.c > index 8b2c9b3..2f7df81 100644 > --- a/target/arm/kvm32.c > +++ b/target/arm/kvm32.c > @@ -84,9 +84,15 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures > *ahcf) > ARM_CP15_REG32(0, 0, 2, 4)); > err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar5, > ARM_CP15_REG32(0, 0, 2, 5)); > - err |= read_sys_reg32(fdarray[2], &ahcf->isar.id_isar6, > - ARM_CP15_REG32(0, 0, 2, 7)); > - > + if (read_sys_reg32(fdarray[2], &ahcf->isar.id_isar6, > + ARM_CP15_REG32(0, 0, 2, 7))) { > + /* > + * Older kernels don't support reading ID_ISAR6. This register was > + * only introduced in ARMv8, so we can assume that it is zero on a > + * CPU that a kernel this old is running on. > + */ > + ahcf->isar.id_isar6 = 0; > + }
Ah, right, thanks. r~