Allow a virtual machine to be forcibly reset or powered off. This is done

by adding an argument to the VM_SUSPEND ioctl that specifies how the virtual
machine should be suspended, viz. VM_SUSPEND_RESET or VM_SUSPEND_POWEROFF.

The disposition of VM_SUSPEND is also made available to the exit handler
via the 'u.suspended' member of 'struct vm_exit'.

This capability is exposed via the '--force-reset' and '--force-poweroff'
arguments to /usr/sbin/bhyvectl.

Discussed with:	grehan@

2 files changed, 6 insertions, 3 deletions

diff --git a/lib/libvmmapi/vmmapi.c b/lib/libvmmapi/vmmapi.c
index 60d3105..4a7f852 100644
--- a/lib/libvmmapi/vmmapi.c
+++ b/lib/libvmmapi/vmmapi.c
@@ -343,10 +343,13 @@ vm_run(struct vmctx *ctx, int vcpu, uint64_t rip, struct vm_exit *vmexit)
 }
 
 int
-vm_suspend(struct vmctx *ctx)
+vm_suspend(struct vmctx *ctx, enum vm_suspend_how how)
 {
+	struct vm_suspend vmsuspend;
 
-	return (ioctl(ctx->fd, VM_SUSPEND, 0));
+	bzero(&vmsuspend, sizeof(vmsuspend));
+	vmsuspend.how = how;
+	return (ioctl(ctx->fd, VM_SUSPEND, &vmsuspend));
 }
 
 static int
diff --git a/lib/libvmmapi/vmmapi.h b/lib/libvmmapi/vmmapi.h
index ed63fb2..2a2ca6b 100644
--- a/lib/libvmmapi/vmmapi.h
+++ b/lib/libvmmapi/vmmapi.h
@@ -61,7 +61,7 @@ int	vm_set_register(struct vmctx *ctx, int vcpu, int reg, uint64_t val);
 int	vm_get_register(struct vmctx *ctx, int vcpu, int reg, uint64_t *retval);
 int	vm_run(struct vmctx *ctx, int vcpu, uint64_t rip,
 	       struct vm_exit *ret_vmexit);
-int	vm_suspend(struct vmctx *ctx);
+int	vm_suspend(struct vmctx *ctx, enum vm_suspend_how how);
 int	vm_apicid2vcpu(struct vmctx *ctx, int apicid);
 int	vm_inject_exception(struct vmctx *ctx, int vcpu, int vec);
 int	vm_inject_exception2(struct vmctx *ctx, int vcpu, int vec, int errcode);