To aid in debugging failures in the field, when instruction emulation fails, report the VM exit reason to userspace in order that it can be recorded. The changes are on top of Aaron's patches from https://lore.kernel.org/r/20210510144834.658457-1-aaronlewis@xxxxxxxxxx which are in the KVM queue, but not yet upstream. David Edmondson (2): KVM: x86: Add kvm_x86_ops.get_exit_reason KVM: x86: On emulation failure, convey the exit reason to userspace arch/x86/include/asm/kvm-x86-ops.h | 1 + arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/svm/svm.c | 6 ++++++ arch/x86/kvm/vmx/vmx.c | 6 ++++++ arch/x86/kvm/x86.c | 23 +++++++++++++++++------ include/uapi/linux/kvm.h | 2 ++ 6 files changed, 33 insertions(+), 6 deletions(-) -- 2.30.2
