PSARC 2009/104 Hot-Plug Support for ACPI-based Systems
6846955 Device tree creation and acpi virtual nexus driver for acpi based x86 systems
6849408 device match rule in ppm.conf is not flexible

@@ -17,16 +17,14 @@
  * information: Portions Copyright [yyyy] [name of copyright owner]
  *
  * CDDL HEADER END
  */
 /*
- * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma ident   "%Z%%M% %I%     %E% SMI"
-
 /*
  * ppm driver subroutines
  */
 
 #include <sys/open.h>

@@ -397,10 +395,13 @@
 ppm_lookup_dev(dev_info_t *dip)
 {
         char path[MAXNAMELEN];
         ppm_domain_t *domp;
         ppm_db_t *dbp;
+#ifdef  __x86
+        char *devtype = NULL;
+#endif  /* __x86 */
 
         PPM_GET_PATHNAME(dip, path);
         for (domp = ppm_domain_p; domp; domp = domp->next) {
                 if (PPM_DOMAIN_UP(domp)) {
                         for (dbp = domp->conflist; dbp; dbp = dbp->next) {

@@ -409,10 +410,29 @@
                                  * its full name
                                  */
                                 if (dip == ddi_root_node() &&
                                     strcmp(dbp->name, "/") == 0)
                                         return (domp);
+
+#ifdef  __x86
+                                /*
+                                 * Special rule to catch all CPU devices on x86.
+                                 */
+                                if (domp->model == PPMD_CPU &&
+                                    strcmp(dbp->name, "/") == 0 &&
+                                    ddi_prop_lookup_string(DDI_DEV_T_ANY, dip,
+                                    DDI_PROP_DONTPASS, "device_type",
+                                    &devtype) == DDI_SUCCESS) {
+                                        if (strcmp(devtype, "cpu") == 0) {
+                                                ddi_prop_free(devtype);
+                                                return (domp);
+                                        } else {
+                                                ddi_prop_free(devtype);
+                                        }
+                                }
+#endif  /* __x86 */
+
                                 if (ppm_match_devs(path, dbp) == 0)
                                         return (domp);
                         }
                 }
         }