Index: usr.sbin/bhyve/bhyve.8
===================================================================
--- usr.sbin/bhyve/bhyve.8
+++ usr.sbin/bhyve/bhyve.8
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd Aug 23, 2018
+.Dd October 12, 2018
 .Dt BHYVE 8
 .Os
 .Sh NAME
@@ -367,7 +367,11 @@
 .Pp
 Framebuffer devices:
 .Bl -tag -width 10n
-.It Oo rfb= Ns Oo Ar IP: Oc Ns Ar port Oc Ns Oo ,w= Ns Ar width Oc Ns Oo ,h= Ns Ar height Oc Ns Oo ,vga= Ns Ar vgaconf Oc Ns Oo Ns ,wait Oc Ns Oo ,password= Ns Ar password Oc
+.It Xo
+.Oo rfb= Ns Oo Ar IP\&: Oc Ns Ar port Oc Ns Oo ,w= Ns Ar width Oc Ns Oo ,h= Ns
+.Ar height Oc Ns Oo ,vga= Ns Ar vgaconf Oc Ns Oo Ns ,wait Oc Ns Oo ,password= Ns
+.Ar password Oc
+.Xc
 .Bl -tag -width 8n
 .It Ar IP:port
 An
@@ -397,8 +401,8 @@
 .Pq 64KB at Ad 0xA0000 .
 The default
 .Dq io
-option should be used for guests that attempt to issue BIOS
-calls which result in I/O port queries, and fail to boot if I/O decode is disabled.
+option should be used for guests that attempt to issue BIOS calls which result
+in I/O port queries, and fail to boot if I/O decode is disabled.
 .Pp
 The
 .Dq on
@@ -423,8 +427,8 @@
 .It wait
 Instruct
 .Nm
-to only boot upon the initiation of a VNC connection, simplifying the installation
-of operating systems that require immediate keyboard input.
+to only boot upon the initiation of a VNC connection, simplifying the
+installation of operating systems that require immediate keyboard input.
 This can be removed for post-installation use.
 .It password
 This type of authentication is known to be cryptographically weak and is not
@@ -496,8 +500,9 @@
 registers such as floating-point and system registers cannot be queried.
 .Ss Memory
 Memory (including memory mapped I/O regions) can be read by the debugger,
-but not written.  Memory operations use virtual addresses that are resolved
-to physical addresses via the current virtual CPU's active address translation.
+but not written.
+Memory operations use virtual addresses that are resolved to physical addresses
+via the current virtual CPU's active address translation.
 .Ss Control
 The running guest can be interrupted by the debugger at any time
 .Pq for example, by pressing Ctrl-C in the debugger .
@@ -594,6 +599,12 @@
 .Xr ethers 5 ,
 .Xr bhyvectl 8 ,
 .Xr bhyveload 8
+.Pp
+.Rs
+.%A Intel
+.%B 64 and IA-32 Architectures Software Developer’s Manual
+.%V Volume 3
+.Re
 .Sh HISTORY
 .Nm
 first appeared in
Index: usr.sbin/bhyve/bhyverun.c
===================================================================
--- usr.sbin/bhyve/bhyverun.c
+++ usr.sbin/bhyve/bhyverun.c
@@ -89,6 +89,27 @@
 #define MB		(1024UL * 1024)
 #define GB		(1024UL * MB)
 
+static const char *exit_reason_desc[] = {
+	"Exception or non-maskable interrupt (NMI)",
+	"External interrupt", "Triple fault", "INIT signal",
+	"Start-up IPI (SIPI)", "I/O system-management interrupt (SMI)",
+	"Other SMI", "Interrupt window", "NMI window", "Task switch",
+	"CPUID", "GETSEC", "HLT", "INVD", "INVLPG", "RDPMC", "RDTSC", "RSM",
+	"VMCALL", "VMCLEAR", "VMLAUNCH", "VMPTRLD", "VMPTRST", "VMREAD",
+	"VMRESUME", "VMWRITE", "VMXOFF", "VMXON", "Control-register accesses",
+	"MOV DR", "I/O instruction", "RDMSR", "WRMSR",
+	"VM-entry failure due to invalid guest state",
+	"VM-entry failure due to MSR loading",
+	"Undefined", "MWAIT", "Monitor trap flag", "Undefined", "MONITOR",
+	"PAUSE", "VM-entry failure due to machine-check event", "Undefined",
+	"TPR below threshold", "APIC access", "Virtualized EOI",
+	"Access to GDTR or IDTR", "Access to LDTR or TR",
+	"EPT violation", "EPT misconfiguration", "INVEPT", "RDTSCP",
+	"VMX-preemption timer expired", "INVVPID", "WBINVD", "XSETBV",
+	"APIC write", "RDRAND", "INVPCID", "VMFUNC", "ENCLS", "RDSEED",
+	"Page-modification log full", "XSAVES", "XRSTORS"
+};
+
 typedef int (*vmexit_handler_t)(struct vmctx *, struct vm_exit *, int *vcpu);
 extern int vmexit_task_switch(struct vmctx *, struct vm_exit *, int *vcpu);
 
@@ -523,7 +544,9 @@
 	fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip);
 	fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length);
 	fprintf(stderr, "\tstatus\t\t%d\n", vmexit->u.vmx.status);
-	fprintf(stderr, "\texit_reason\t%u\n", vmexit->u.vmx.exit_reason);
+	fprintf(stderr, "\texit_reason\t%u (%s)\n", vmexit->u.vmx.exit_reason,
+	    vmexit->u.vmx.exit_reason < nitems(exit_reason_desc) ?
+	    exit_reason_desc[vmexit->u.vmx.exit_reason] : "Unknown");
 	fprintf(stderr, "\tqualification\t0x%016lx\n",
 	    vmexit->u.vmx.exit_qualification);
 	fprintf(stderr, "\tinst_type\t\t%d\n", vmexit->u.vmx.inst_type);