Add qemu 2.4.0
[kvmfornfv.git] / qemu / dtc / checks.c
diff --git a/qemu/dtc/checks.c b/qemu/dtc/checks.c
new file mode 100644 (file)
index 0000000..ee96a25
--- /dev/null
@@ -0,0 +1,759 @@
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2007.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
+ *                                                                   USA
+ */
+
+#include "dtc.h"
+
+#ifdef TRACE_CHECKS
+#define TRACE(c, ...) \
+       do { \
+               fprintf(stderr, "=== %s: ", (c)->name); \
+               fprintf(stderr, __VA_ARGS__); \
+               fprintf(stderr, "\n"); \
+       } while (0)
+#else
+#define TRACE(c, fmt, ...)     do { } while (0)
+#endif
+
+enum checkstatus {
+       UNCHECKED = 0,
+       PREREQ,
+       PASSED,
+       FAILED,
+};
+
+struct check;
+
+typedef void (*tree_check_fn)(struct check *c, struct node *dt);
+typedef void (*node_check_fn)(struct check *c, struct node *dt, struct node *node);
+typedef void (*prop_check_fn)(struct check *c, struct node *dt,
+                             struct node *node, struct property *prop);
+
+struct check {
+       const char *name;
+       tree_check_fn tree_fn;
+       node_check_fn node_fn;
+       prop_check_fn prop_fn;
+       void *data;
+       bool warn, error;
+       enum checkstatus status;
+       int inprogress;
+       int num_prereqs;
+       struct check **prereq;
+};
+
+#define CHECK_ENTRY(nm, tfn, nfn, pfn, d, w, e, ...)          \
+       static struct check *nm##_prereqs[] = { __VA_ARGS__ }; \
+       static struct check nm = { \
+               .name = #nm, \
+               .tree_fn = (tfn), \
+               .node_fn = (nfn), \
+               .prop_fn = (pfn), \
+               .data = (d), \
+               .warn = (w), \
+               .error = (e), \
+               .status = UNCHECKED, \
+               .num_prereqs = ARRAY_SIZE(nm##_prereqs), \
+               .prereq = nm##_prereqs, \
+       };
+#define WARNING(nm, tfn, nfn, pfn, d, ...) \
+       CHECK_ENTRY(nm, tfn, nfn, pfn, d, true, false, __VA_ARGS__)
+#define ERROR(nm, tfn, nfn, pfn, d, ...) \
+       CHECK_ENTRY(nm, tfn, nfn, pfn, d, false, true, __VA_ARGS__)
+#define CHECK(nm, tfn, nfn, pfn, d, ...) \
+       CHECK_ENTRY(nm, tfn, nfn, pfn, d, false, false, __VA_ARGS__)
+
+#define TREE_WARNING(nm, d, ...) \
+       WARNING(nm, check_##nm, NULL, NULL, d, __VA_ARGS__)
+#define TREE_ERROR(nm, d, ...) \
+       ERROR(nm, check_##nm, NULL, NULL, d, __VA_ARGS__)
+#define TREE_CHECK(nm, d, ...) \
+       CHECK(nm, check_##nm, NULL, NULL, d, __VA_ARGS__)
+#define NODE_WARNING(nm, d, ...) \
+       WARNING(nm, NULL, check_##nm, NULL, d,  __VA_ARGS__)
+#define NODE_ERROR(nm, d, ...) \
+       ERROR(nm, NULL, check_##nm, NULL, d, __VA_ARGS__)
+#define NODE_CHECK(nm, d, ...) \
+       CHECK(nm, NULL, check_##nm, NULL, d, __VA_ARGS__)
+#define PROP_WARNING(nm, d, ...) \
+       WARNING(nm, NULL, NULL, check_##nm, d, __VA_ARGS__)
+#define PROP_ERROR(nm, d, ...) \
+       ERROR(nm, NULL, NULL, check_##nm, d, __VA_ARGS__)
+#define PROP_CHECK(nm, d, ...) \
+       CHECK(nm, NULL, NULL, check_##nm, d, __VA_ARGS__)
+
+#ifdef __GNUC__
+static inline void check_msg(struct check *c, const char *fmt, ...) __attribute__((format (printf, 2, 3)));
+#endif
+static inline void check_msg(struct check *c, const char *fmt, ...)
+{
+       va_list ap;
+       va_start(ap, fmt);
+
+       if ((c->warn && (quiet < 1))
+           || (c->error && (quiet < 2))) {
+               fprintf(stderr, "%s (%s): ",
+                       (c->error) ? "ERROR" : "Warning", c->name);
+               vfprintf(stderr, fmt, ap);
+               fprintf(stderr, "\n");
+       }
+}
+
+#define FAIL(c, ...) \
+       do { \
+               TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \
+               (c)->status = FAILED; \
+               check_msg((c), __VA_ARGS__); \
+       } while (0)
+
+static void check_nodes_props(struct check *c, struct node *dt, struct node *node)
+{
+       struct node *child;
+       struct property *prop;
+
+       TRACE(c, "%s", node->fullpath);
+       if (c->node_fn)
+               c->node_fn(c, dt, node);
+
+       if (c->prop_fn)
+               for_each_property(node, prop) {
+                       TRACE(c, "%s\t'%s'", node->fullpath, prop->name);
+                       c->prop_fn(c, dt, node, prop);
+               }
+
+       for_each_child(node, child)
+               check_nodes_props(c, dt, child);
+}
+
+static int run_check(struct check *c, struct node *dt)
+{
+       int error = 0;
+       int i;
+
+       assert(!c->inprogress);
+
+       if (c->status != UNCHECKED)
+               goto out;
+
+       c->inprogress = 1;
+
+       for (i = 0; i < c->num_prereqs; i++) {
+               struct check *prq = c->prereq[i];
+               error |= run_check(prq, dt);
+               if (prq->status != PASSED) {
+                       c->status = PREREQ;
+                       check_msg(c, "Failed prerequisite '%s'",
+                                 c->prereq[i]->name);
+               }
+       }
+
+       if (c->status != UNCHECKED)
+               goto out;
+
+       if (c->node_fn || c->prop_fn)
+               check_nodes_props(c, dt, dt);
+
+       if (c->tree_fn)
+               c->tree_fn(c, dt);
+       if (c->status == UNCHECKED)
+               c->status = PASSED;
+
+       TRACE(c, "\tCompleted, status %d", c->status);
+
+out:
+       c->inprogress = 0;
+       if ((c->status != PASSED) && (c->error))
+               error = 1;
+       return error;
+}
+
+/*
+ * Utility check functions
+ */
+
+/* A check which always fails, for testing purposes only */
+static inline void check_always_fail(struct check *c, struct node *dt)
+{
+       FAIL(c, "always_fail check");
+}
+TREE_CHECK(always_fail, NULL);
+
+static void check_is_string(struct check *c, struct node *root,
+                           struct node *node)
+{
+       struct property *prop;
+       char *propname = c->data;
+
+       prop = get_property(node, propname);
+       if (!prop)
+               return; /* Not present, assumed ok */
+
+       if (!data_is_one_string(prop->val))
+               FAIL(c, "\"%s\" property in %s is not a string",
+                    propname, node->fullpath);
+}
+#define WARNING_IF_NOT_STRING(nm, propname) \
+       WARNING(nm, NULL, check_is_string, NULL, (propname))
+#define ERROR_IF_NOT_STRING(nm, propname) \
+       ERROR(nm, NULL, check_is_string, NULL, (propname))
+
+static void check_is_cell(struct check *c, struct node *root,
+                         struct node *node)
+{
+       struct property *prop;
+       char *propname = c->data;
+
+       prop = get_property(node, propname);
+       if (!prop)
+               return; /* Not present, assumed ok */
+
+       if (prop->val.len != sizeof(cell_t))
+               FAIL(c, "\"%s\" property in %s is not a single cell",
+                    propname, node->fullpath);
+}
+#define WARNING_IF_NOT_CELL(nm, propname) \
+       WARNING(nm, NULL, check_is_cell, NULL, (propname))
+#define ERROR_IF_NOT_CELL(nm, propname) \
+       ERROR(nm, NULL, check_is_cell, NULL, (propname))
+
+/*
+ * Structural check functions
+ */
+
+static void check_duplicate_node_names(struct check *c, struct node *dt,
+                                      struct node *node)
+{
+       struct node *child, *child2;
+
+       for_each_child(node, child)
+               for (child2 = child->next_sibling;
+                    child2;
+                    child2 = child2->next_sibling)
+                       if (streq(child->name, child2->name))
+                               FAIL(c, "Duplicate node name %s",
+                                    child->fullpath);
+}
+NODE_ERROR(duplicate_node_names, NULL);
+
+static void check_duplicate_property_names(struct check *c, struct node *dt,
+                                          struct node *node)
+{
+       struct property *prop, *prop2;
+
+       for_each_property(node, prop) {
+               for (prop2 = prop->next; prop2; prop2 = prop2->next) {
+                       if (prop2->deleted)
+                               continue;
+                       if (streq(prop->name, prop2->name))
+                               FAIL(c, "Duplicate property name %s in %s",
+                                    prop->name, node->fullpath);
+               }
+       }
+}
+NODE_ERROR(duplicate_property_names, NULL);
+
+#define LOWERCASE      "abcdefghijklmnopqrstuvwxyz"
+#define UPPERCASE      "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+#define DIGITS         "0123456789"
+#define PROPNODECHARS  LOWERCASE UPPERCASE DIGITS ",._+*#?-"
+
+static void check_node_name_chars(struct check *c, struct node *dt,
+                                 struct node *node)
+{
+       int n = strspn(node->name, c->data);
+
+       if (n < strlen(node->name))
+               FAIL(c, "Bad character '%c' in node %s",
+                    node->name[n], node->fullpath);
+}
+NODE_ERROR(node_name_chars, PROPNODECHARS "@");
+
+static void check_node_name_format(struct check *c, struct node *dt,
+                                  struct node *node)
+{
+       if (strchr(get_unitname(node), '@'))
+               FAIL(c, "Node %s has multiple '@' characters in name",
+                    node->fullpath);
+}
+NODE_ERROR(node_name_format, NULL, &node_name_chars);
+
+static void check_property_name_chars(struct check *c, struct node *dt,
+                                     struct node *node, struct property *prop)
+{
+       int n = strspn(prop->name, c->data);
+
+       if (n < strlen(prop->name))
+               FAIL(c, "Bad character '%c' in property name \"%s\", node %s",
+                    prop->name[n], prop->name, node->fullpath);
+}
+PROP_ERROR(property_name_chars, PROPNODECHARS);
+
+#define DESCLABEL_FMT  "%s%s%s%s%s"
+#define DESCLABEL_ARGS(node,prop,mark)         \
+       ((mark) ? "value of " : ""),            \
+       ((prop) ? "'" : ""), \
+       ((prop) ? (prop)->name : ""), \
+       ((prop) ? "' in " : ""), (node)->fullpath
+
+static void check_duplicate_label(struct check *c, struct node *dt,
+                                 const char *label, struct node *node,
+                                 struct property *prop, struct marker *mark)
+{
+       struct node *othernode = NULL;
+       struct property *otherprop = NULL;
+       struct marker *othermark = NULL;
+
+       othernode = get_node_by_label(dt, label);
+
+       if (!othernode)
+               otherprop = get_property_by_label(dt, label, &othernode);
+       if (!othernode)
+               othermark = get_marker_label(dt, label, &othernode,
+                                              &otherprop);
+
+       if (!othernode)
+               return;
+
+       if ((othernode != node) || (otherprop != prop) || (othermark != mark))
+               FAIL(c, "Duplicate label '%s' on " DESCLABEL_FMT
+                    " and " DESCLABEL_FMT,
+                    label, DESCLABEL_ARGS(node, prop, mark),
+                    DESCLABEL_ARGS(othernode, otherprop, othermark));
+}
+
+static void check_duplicate_label_node(struct check *c, struct node *dt,
+                                      struct node *node)
+{
+       struct label *l;
+
+       for_each_label(node->labels, l)
+               check_duplicate_label(c, dt, l->label, node, NULL, NULL);
+}
+static void check_duplicate_label_prop(struct check *c, struct node *dt,
+                                      struct node *node, struct property *prop)
+{
+       struct marker *m = prop->val.markers;
+       struct label *l;
+
+       for_each_label(prop->labels, l)
+               check_duplicate_label(c, dt, l->label, node, prop, NULL);
+
+       for_each_marker_of_type(m, LABEL)
+               check_duplicate_label(c, dt, m->ref, node, prop, m);
+}
+ERROR(duplicate_label, NULL, check_duplicate_label_node,
+      check_duplicate_label_prop, NULL);
+
+static void check_explicit_phandles(struct check *c, struct node *root,
+                                   struct node *node, struct property *prop)
+{
+       struct marker *m;
+       struct node *other;
+       cell_t phandle;
+
+       if (!streq(prop->name, "phandle")
+           && !streq(prop->name, "linux,phandle"))
+               return;
+
+       if (prop->val.len != sizeof(cell_t)) {
+               FAIL(c, "%s has bad length (%d) %s property",
+                    node->fullpath, prop->val.len, prop->name);
+               return;
+       }
+
+       m = prop->val.markers;
+       for_each_marker_of_type(m, REF_PHANDLE) {
+               assert(m->offset == 0);
+               if (node != get_node_by_ref(root, m->ref))
+                       /* "Set this node's phandle equal to some
+                        * other node's phandle".  That's nonsensical
+                        * by construction. */ {
+                       FAIL(c, "%s in %s is a reference to another node",
+                            prop->name, node->fullpath);
+                       return;
+               }
+               /* But setting this node's phandle equal to its own
+                * phandle is allowed - that means allocate a unique
+                * phandle for this node, even if it's not otherwise
+                * referenced.  The value will be filled in later, so
+                * no further checking for now. */
+               return;
+       }
+
+       phandle = propval_cell(prop);
+
+       if ((phandle == 0) || (phandle == -1)) {
+               FAIL(c, "%s has bad value (0x%x) in %s property",
+                    node->fullpath, phandle, prop->name);
+               return;
+       }
+
+       if (node->phandle && (node->phandle != phandle))
+               FAIL(c, "%s has %s property which replaces existing phandle information",
+                    node->fullpath, prop->name);
+
+       other = get_node_by_phandle(root, phandle);
+       if (other && (other != node)) {
+               FAIL(c, "%s has duplicated phandle 0x%x (seen before at %s)",
+                    node->fullpath, phandle, other->fullpath);
+               return;
+       }
+
+       node->phandle = phandle;
+}
+PROP_ERROR(explicit_phandles, NULL);
+
+static void check_name_properties(struct check *c, struct node *root,
+                                 struct node *node)
+{
+       struct property **pp, *prop = NULL;
+
+       for (pp = &node->proplist; *pp; pp = &((*pp)->next))
+               if (streq((*pp)->name, "name")) {
+                       prop = *pp;
+                       break;
+               }
+
+       if (!prop)
+               return; /* No name property, that's fine */
+
+       if ((prop->val.len != node->basenamelen+1)
+           || (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) {
+               FAIL(c, "\"name\" property in %s is incorrect (\"%s\" instead"
+                    " of base node name)", node->fullpath, prop->val.val);
+       } else {
+               /* The name property is correct, and therefore redundant.
+                * Delete it */
+               *pp = prop->next;
+               free(prop->name);
+               data_free(prop->val);
+               free(prop);
+       }
+}
+ERROR_IF_NOT_STRING(name_is_string, "name");
+NODE_ERROR(name_properties, NULL, &name_is_string);
+
+/*
+ * Reference fixup functions
+ */
+
+static void fixup_phandle_references(struct check *c, struct node *dt,
+                                    struct node *node, struct property *prop)
+{
+       struct marker *m = prop->val.markers;
+       struct node *refnode;
+       cell_t phandle;
+
+       for_each_marker_of_type(m, REF_PHANDLE) {
+               assert(m->offset + sizeof(cell_t) <= prop->val.len);
+
+               refnode = get_node_by_ref(dt, m->ref);
+               if (! refnode) {
+                       FAIL(c, "Reference to non-existent node or label \"%s\"\n",
+                            m->ref);
+                       continue;
+               }
+
+               phandle = get_node_phandle(dt, refnode);
+               *((cell_t *)(prop->val.val + m->offset)) = cpu_to_fdt32(phandle);
+       }
+}
+ERROR(phandle_references, NULL, NULL, fixup_phandle_references, NULL,
+      &duplicate_node_names, &explicit_phandles);
+
+static void fixup_path_references(struct check *c, struct node *dt,
+                                 struct node *node, struct property *prop)
+{
+       struct marker *m = prop->val.markers;
+       struct node *refnode;
+       char *path;
+
+       for_each_marker_of_type(m, REF_PATH) {
+               assert(m->offset <= prop->val.len);
+
+               refnode = get_node_by_ref(dt, m->ref);
+               if (!refnode) {
+                       FAIL(c, "Reference to non-existent node or label \"%s\"\n",
+                            m->ref);
+                       continue;
+               }
+
+               path = refnode->fullpath;
+               prop->val = data_insert_at_marker(prop->val, m, path,
+                                                 strlen(path) + 1);
+       }
+}
+ERROR(path_references, NULL, NULL, fixup_path_references, NULL,
+      &duplicate_node_names);
+
+/*
+ * Semantic checks
+ */
+WARNING_IF_NOT_CELL(address_cells_is_cell, "#address-cells");
+WARNING_IF_NOT_CELL(size_cells_is_cell, "#size-cells");
+WARNING_IF_NOT_CELL(interrupt_cells_is_cell, "#interrupt-cells");
+
+WARNING_IF_NOT_STRING(device_type_is_string, "device_type");
+WARNING_IF_NOT_STRING(model_is_string, "model");
+WARNING_IF_NOT_STRING(status_is_string, "status");
+
+static void fixup_addr_size_cells(struct check *c, struct node *dt,
+                                 struct node *node)
+{
+       struct property *prop;
+
+       node->addr_cells = -1;
+       node->size_cells = -1;
+
+       prop = get_property(node, "#address-cells");
+       if (prop)
+               node->addr_cells = propval_cell(prop);
+
+       prop = get_property(node, "#size-cells");
+       if (prop)
+               node->size_cells = propval_cell(prop);
+}
+WARNING(addr_size_cells, NULL, fixup_addr_size_cells, NULL, NULL,
+       &address_cells_is_cell, &size_cells_is_cell);
+
+#define node_addr_cells(n) \
+       (((n)->addr_cells == -1) ? 2 : (n)->addr_cells)
+#define node_size_cells(n) \
+       (((n)->size_cells == -1) ? 1 : (n)->size_cells)
+
+static void check_reg_format(struct check *c, struct node *dt,
+                            struct node *node)
+{
+       struct property *prop;
+       int addr_cells, size_cells, entrylen;
+
+       prop = get_property(node, "reg");
+       if (!prop)
+               return; /* No "reg", that's fine */
+
+       if (!node->parent) {
+               FAIL(c, "Root node has a \"reg\" property");
+               return;
+       }
+
+       if (prop->val.len == 0)
+               FAIL(c, "\"reg\" property in %s is empty", node->fullpath);
+
+       addr_cells = node_addr_cells(node->parent);
+       size_cells = node_size_cells(node->parent);
+       entrylen = (addr_cells + size_cells) * sizeof(cell_t);
+
+       if ((prop->val.len % entrylen) != 0)
+               FAIL(c, "\"reg\" property in %s has invalid length (%d bytes) "
+                    "(#address-cells == %d, #size-cells == %d)",
+                    node->fullpath, prop->val.len, addr_cells, size_cells);
+}
+NODE_WARNING(reg_format, NULL, &addr_size_cells);
+
+static void check_ranges_format(struct check *c, struct node *dt,
+                               struct node *node)
+{
+       struct property *prop;
+       int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
+
+       prop = get_property(node, "ranges");
+       if (!prop)
+               return;
+
+       if (!node->parent) {
+               FAIL(c, "Root node has a \"ranges\" property");
+               return;
+       }
+
+       p_addr_cells = node_addr_cells(node->parent);
+       p_size_cells = node_size_cells(node->parent);
+       c_addr_cells = node_addr_cells(node);
+       c_size_cells = node_size_cells(node);
+       entrylen = (p_addr_cells + c_addr_cells + c_size_cells) * sizeof(cell_t);
+
+       if (prop->val.len == 0) {
+               if (p_addr_cells != c_addr_cells)
+                       FAIL(c, "%s has empty \"ranges\" property but its "
+                            "#address-cells (%d) differs from %s (%d)",
+                            node->fullpath, c_addr_cells, node->parent->fullpath,
+                            p_addr_cells);
+               if (p_size_cells != c_size_cells)
+                       FAIL(c, "%s has empty \"ranges\" property but its "
+                            "#size-cells (%d) differs from %s (%d)",
+                            node->fullpath, c_size_cells, node->parent->fullpath,
+                            p_size_cells);
+       } else if ((prop->val.len % entrylen) != 0) {
+               FAIL(c, "\"ranges\" property in %s has invalid length (%d bytes) "
+                    "(parent #address-cells == %d, child #address-cells == %d, "
+                    "#size-cells == %d)", node->fullpath, prop->val.len,
+                    p_addr_cells, c_addr_cells, c_size_cells);
+       }
+}
+NODE_WARNING(ranges_format, NULL, &addr_size_cells);
+
+/*
+ * Style checks
+ */
+static void check_avoid_default_addr_size(struct check *c, struct node *dt,
+                                         struct node *node)
+{
+       struct property *reg, *ranges;
+
+       if (!node->parent)
+               return; /* Ignore root node */
+
+       reg = get_property(node, "reg");
+       ranges = get_property(node, "ranges");
+
+       if (!reg && !ranges)
+               return;
+
+       if ((node->parent->addr_cells == -1))
+               FAIL(c, "Relying on default #address-cells value for %s",
+                    node->fullpath);
+
+       if ((node->parent->size_cells == -1))
+               FAIL(c, "Relying on default #size-cells value for %s",
+                    node->fullpath);
+}
+NODE_WARNING(avoid_default_addr_size, NULL, &addr_size_cells);
+
+static void check_obsolete_chosen_interrupt_controller(struct check *c,
+                                                      struct node *dt)
+{
+       struct node *chosen;
+       struct property *prop;
+
+       chosen = get_node_by_path(dt, "/chosen");
+       if (!chosen)
+               return;
+
+       prop = get_property(chosen, "interrupt-controller");
+       if (prop)
+               FAIL(c, "/chosen has obsolete \"interrupt-controller\" "
+                    "property");
+}
+TREE_WARNING(obsolete_chosen_interrupt_controller, NULL);
+
+static struct check *check_table[] = {
+       &duplicate_node_names, &duplicate_property_names,
+       &node_name_chars, &node_name_format, &property_name_chars,
+       &name_is_string, &name_properties,
+
+       &duplicate_label,
+
+       &explicit_phandles,
+       &phandle_references, &path_references,
+
+       &address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell,
+       &device_type_is_string, &model_is_string, &status_is_string,
+
+       &addr_size_cells, &reg_format, &ranges_format,
+
+       &avoid_default_addr_size,
+       &obsolete_chosen_interrupt_controller,
+
+       &always_fail,
+};
+
+static void enable_warning_error(struct check *c, bool warn, bool error)
+{
+       int i;
+
+       /* Raising level, also raise it for prereqs */
+       if ((warn && !c->warn) || (error && !c->error))
+               for (i = 0; i < c->num_prereqs; i++)
+                       enable_warning_error(c->prereq[i], warn, error);
+
+       c->warn = c->warn || warn;
+       c->error = c->error || error;
+}
+
+static void disable_warning_error(struct check *c, bool warn, bool error)
+{
+       int i;
+
+       /* Lowering level, also lower it for things this is the prereq
+        * for */
+       if ((warn && c->warn) || (error && c->error)) {
+               for (i = 0; i < ARRAY_SIZE(check_table); i++) {
+                       struct check *cc = check_table[i];
+                       int j;
+
+                       for (j = 0; j < cc->num_prereqs; j++)
+                               if (cc->prereq[j] == c)
+                                       disable_warning_error(cc, warn, error);
+               }
+       }
+
+       c->warn = c->warn && !warn;
+       c->error = c->error && !error;
+}
+
+void parse_checks_option(bool warn, bool error, const char *optarg)
+{
+       int i;
+       const char *name = optarg;
+       bool enable = true;
+
+       if ((strncmp(optarg, "no-", 3) == 0)
+           || (strncmp(optarg, "no_", 3) == 0)) {
+               name = optarg + 3;
+               enable = false;
+       }
+
+       for (i = 0; i < ARRAY_SIZE(check_table); i++) {
+               struct check *c = check_table[i];
+
+               if (streq(c->name, name)) {
+                       if (enable)
+                               enable_warning_error(c, warn, error);
+                       else
+                               disable_warning_error(c, warn, error);
+                       return;
+               }
+       }
+
+       die("Unrecognized check name \"%s\"\n", name);
+}
+
+void process_checks(int force, struct boot_info *bi)
+{
+       struct node *dt = bi->dt;
+       int i;
+       int error = 0;
+
+       for (i = 0; i < ARRAY_SIZE(check_table); i++) {
+               struct check *c = check_table[i];
+
+               if (c->warn || c->error)
+                       error = error || run_check(c, dt);
+       }
+
+       if (error) {
+               if (!force) {
+                       fprintf(stderr, "ERROR: Input tree has errors, aborting "
+                               "(use -f to force output)\n");
+                       exit(2);
+               } else if (quiet < 3) {
+                       fprintf(stderr, "Warning: Input tree has errors, "
+                               "output forced\n");
+               }
+       }
+}