The system state of KVM when using userspace emulation is not complete until we return into KVM_RUN. To handle mmio related updates we wait until they have been committed and then schedule our KVM_EXIT_DEBUG. The kvm_arm_handle_step_debug() helper tells us if we need to return and sets up the exit_reason for us. Signed-off-by: Alex Bennée <alex.bennee@xxxxxxxxxx> --- v2 - call helper directly from kvm_arch_vcpu_ioctl_run --- virt/kvm/arm/arm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 95cba0799828..2991adfaca9d 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -625,6 +625,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) ret = kvm_handle_mmio_return(vcpu, vcpu->run); if (ret) return ret; + if (kvm_arm_handle_step_debug(vcpu, vcpu->run)) + return 1; + } if (run->immediate_exit) -- 2.14.2
