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@

1 files changed, 12 insertions, 1 deletions

diff --git a/sys/amd64/include/vmm.h b/sys/amd64/include/vmm.h
index 364bbb855e7f..98a1e2e0130e 100644
--- a/sys/amd64/include/vmm.h
+++ b/sys/amd64/include/vmm.h
@@ -29,6 +29,13 @@
 #ifndef _VMM_H_
 #define	_VMM_H_
 
+enum vm_suspend_how {
+	VM_SUSPEND_NONE,
+	VM_SUSPEND_RESET,
+	VM_SUSPEND_POWEROFF,
+	VM_SUSPEND_LAST
+};
+
 #ifdef _KERNEL
 
 #define	VM_MAX_NAMELEN	32
@@ -115,7 +122,7 @@ int vm_get_seg_desc(struct vm *vm, int vcpu, int reg,
 int vm_set_seg_desc(struct vm *vm, int vcpu, int reg,
 		    struct seg_desc *desc);
 int vm_run(struct vm *vm, struct vm_run *vmrun);
-int vm_suspend(struct vm *vm);
+int vm_suspend(struct vm *vm, enum vm_suspend_how how);
 int vm_inject_nmi(struct vm *vm, int vcpu);
 int vm_nmi_pending(struct vm *vm, int vcpuid);
 void vm_nmi_clear(struct vm *vm, int vcpuid);
@@ -134,6 +141,7 @@ int vm_apicid2vcpuid(struct vm *vm, int apicid);
 void vm_activate_cpu(struct vm *vm, int vcpu);
 cpuset_t vm_active_cpus(struct vm *vm);
 struct vm_exit *vm_exitinfo(struct vm *vm, int vcpuid);
+void vm_exit_suspended(struct vm *vm, int vcpuid, uint64_t rip);
 
 /*
  * Rendezvous all vcpus specified in 'dest' and execute 'func(arg)'.
@@ -382,6 +390,9 @@ struct vm_exit {
 		struct {
 			int		vector;
 		} ioapic_eoi;
+		struct {
+			enum vm_suspend_how how;
+		} suspended;
 	} u;
 };