Don't die on old kernels without single-step debug support

Better inform the user that the host kernel do not
support single-stepping debug.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

diff --git a/tools/kvm/kvm.c b/tools/kvm/kvm.c
index 566a453e831596070175ea49eea5cd1f56b91e9e..c8bb938d4bf929172f0c94078a798e172a7cc744 100644 (file)
--- a/tools/kvm/kvm.c
+++ b/tools/kvm/kvm.c
@@ -131,7 +131,7 @@ static void kvm__enable_singlestep(struct kvm *self)
        };
 
        if (ioctl(self->vcpu_fd, KVM_SET_GUEST_DEBUG, &debug) < 0)
-               die("KVM_SET_GUEST_DEBUG failed");
+               warning("KVM_SET_GUEST_DEBUG failed");
 }
 
 static void kvm__show_registers(struct kvm *self)