D46484.diff
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	diff --git a/sys/arm64/include/vmm.h b/sys/arm64/include/vmm.h
	--- a/sys/arm64/include/vmm.h
	+++ b/sys/arm64/include/vmm.h
	@@ -102,14 +102,30 @@
	#define VM_INTINFO_HWEXCEPTION (3 << 8)
	#define VM_INTINFO_SWINTR (4 << 8)

	-#define VM_MAX_SUFFIXLEN 15
	-
	#define VM_GUEST_BASE_IPA 0x80000000UL /* Guest kernel start ipa */

	-#ifdef _KERNEL
	-
	-#define VM_MAX_NAMELEN 32
	+/*
	+ * The VM name has to fit into the pathname length constraints of devfs,
	+ * governed primarily by SPECNAMELEN. The length is the total number of
	+ * characters in the full path, relative to the mount point and not
	+ * including any leading '/' characters.
	+ * A prefix and a suffix are added to the name specified by the user.
	+ * The prefix is usually "vmm/" or "vmm.io/", but can be a few characters
	+ * longer for future use.
	+ * The suffix is a string that identifies a bootrom image or some similar
	+ * image that is attached to the VM. A separator character gets added to
	+ * the suffix automatically when generating the full path, so it must be
	+ * accounted for, reducing the effective length by 1.
	+ * The effective length of a VM name is 229 bytes for FreeBSD 13 and 37
	+ * bytes for FreeBSD 12. A minimum length is set for safety and supports
	+ * a SPECNAMELEN as small as 32 on old systems.
	+ */
	+#define VM_MAX_PREFIXLEN 10
	+#define VM_MAX_SUFFIXLEN 15
	+#define VM_MAX_NAMELEN \
	+ (SPECNAMELEN - VM_MAX_PREFIXLEN - VM_MAX_SUFFIXLEN - 1)

	+#ifdef _KERNEL
	struct vm;
	struct vm_exception;
	struct vm_exit;