diff --git a/usr.sbin/bhyve/basl.h b/usr.sbin/bhyve/basl.h
--- a/usr.sbin/bhyve/basl.h
+++ b/usr.sbin/bhyve/basl.h
@@ -53,6 +53,9 @@
     uint32_t len);
 int basl_table_append_checksum(struct basl_table *table, uint32_t start,
     uint32_t len);
+/* Add an ACPI_TABLE_* to basl without its header. */
+int basl_table_append_content(struct basl_table *table, void *data,
+    uint32_t len);
 int basl_table_append_gas(struct basl_table *table, uint8_t space_id,
     uint8_t bit_width, uint8_t bit_offset, uint8_t access_width,
     uint64_t address);
diff --git a/usr.sbin/bhyve/basl.c b/usr.sbin/bhyve/basl.c
--- a/usr.sbin/bhyve/basl.c
+++ b/usr.sbin/bhyve/basl.c
@@ -437,6 +437,17 @@
 	return (0);
 }
 
+int
+basl_table_append_content(struct basl_table *table, void *data, uint32_t len)
+{
+	assert(data != NULL);
+	assert(len >= sizeof(ACPI_TABLE_HEADER));
+
+	return (basl_table_append_bytes(table,
+	    (void *)((uintptr_t)(data) + sizeof(ACPI_TABLE_HEADER)),
+	    len - sizeof(ACPI_TABLE_HEADER)));
+}
+
 int
 basl_table_append_gas(struct basl_table *const table, const uint8_t space_id,
     const uint8_t bit_width, const uint8_t bit_offset,