If an application tries to access memory that is not mapped, an error ENOSYS, "load/store instruction decoding not implemented" may occur. QEMU will hang with a register dump.
Instead create a data abort that can be handled gracefully by the application running in the virtual environment. Now the virtual machine can react to the event in the most appropriate way - by recovering, by writing an informative log, or by rebooting. Signed-off-by: Heinrich Schuchardt <[email protected]> --- virt/kvm/arm/mmio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/virt/kvm/arm/mmio.c b/virt/kvm/arm/mmio.c index a8a6a0c883f1..0cbed7d6a0f4 100644 --- a/virt/kvm/arm/mmio.c +++ b/virt/kvm/arm/mmio.c @@ -161,8 +161,8 @@ int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run, if (ret) return ret; } else { - kvm_err("load/store instruction decoding not implemented\n"); - return -ENOSYS; + kvm_inject_dabt(vcpu, kvm_vcpu_get_hfar(vcpu)); + return 1; } rt = vcpu->arch.mmio_decode.rt; -- 2.23.0.rc1
