1 files changed, 443 insertions, 121 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index c458c4a371d1..a06131f6259a 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1,13 +1,19 @@
-#include "util.h"
-#include "../perf.h"
-#include "sort.h"
-#include "string.h"
+#define _GNU_SOURCE
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <libgen.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <fcntl.h>
+#include <unistd.h>
 #include "symbol.h"
-#include "thread.h"
+#include "strlist.h"
 
-#include "debug.h"
-
-#include <asm/bug.h>
 #include <libelf.h>
 #include <gelf.h>
 #include <elf.h>
@@ -18,22 +24,12 @@
 #define NT_GNU_BUILD_ID 3
 #endif
 
-enum dso_origin {
-        DSO__ORIG_KERNEL = 0,
-        DSO__ORIG_JAVA_JIT,
-        DSO__ORIG_BUILD_ID_CACHE,
-        DSO__ORIG_FEDORA,
-        DSO__ORIG_UBUNTU,
-        DSO__ORIG_BUILDID,
-        DSO__ORIG_DSO,
-        DSO__ORIG_KMODULE,
-        DSO__ORIG_NOT_FOUND,
-};
-
 static void dsos__add(struct list_head *head, struct dso *dso);
 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
 static int dso__load_kernel_sym(struct dso *self, struct map *map,
                                 symbol_filter_t filter);
+static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
+                        symbol_filter_t filter);
 static int vmlinux_path__nr_entries;
 static char **vmlinux_path;
 
@@ -126,16 +122,17 @@ static void map_groups__fixup_end(struct map_groups *self)
 static struct symbol *symbol__new(u64 start, u64 len, const char *name)
 {
         size_t namelen = strlen(name) + 1;
-        struct symbol *self = zalloc(symbol_conf.priv_size +
-                                     sizeof(*self) + namelen);
+        struct symbol *self = calloc(1, (symbol_conf.priv_size +
+                                         sizeof(*self) + namelen));
         if (self == NULL)
                 return NULL;
 
         if (symbol_conf.priv_size)
                 self = ((void *)self) + symbol_conf.priv_size;
 
-        self->start = start;
-        self->end   = len ? start + len - 1 : start;
+        self->start   = start;
+        self->end     = len ? start + len - 1 : start;
+        self->namelen = namelen - 1;
 
         pr_debug4("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
 
@@ -178,7 +175,7 @@ static void dso__set_basename(struct dso *self)
 
 struct dso *dso__new(const char *name)
 {
-        struct dso *self = zalloc(sizeof(*self) + strlen(name) + 1);
+        struct dso *self = calloc(1, sizeof(*self) + strlen(name) + 1);
 
         if (self != NULL) {
                 int i;
@@ -192,6 +189,8 @@ struct dso *dso__new(const char *name)
                 self->loaded = 0;
                 self->sorted_by_name = 0;
                 self->has_build_id = 0;
+                self->kernel = DSO_TYPE_USER;
+                INIT_LIST_HEAD(&self->node);
         }
 
         return self;
@@ -408,12 +407,9 @@ int kallsyms__parse(const char *filename, void *arg,
                 char *symbol_name;
 
                 line_len = getline(&line, &n, file);
-                if (line_len < 0)
+                if (line_len < 0 || !line)
                         break;
 
-                if (!line)
-                        goto out_failure;
-
                 line[--line_len] = '\0'; /* \n */
 
                 len = hex2u64(line, &start);
@@ -465,6 +461,7 @@ static int map__process_kallsym_symbol(void *arg, const char *name,
          * map__split_kallsyms, when we have split the maps per module
          */
         symbols__insert(root, sym);
+
         return 0;
 }
 
@@ -489,6 +486,7 @@ static int dso__split_kallsyms(struct dso *self, struct map *map,
                                symbol_filter_t filter)
 {
         struct map_groups *kmaps = map__kmap(map)->kmaps;
+        struct machine *machine = kmaps->machine;
         struct map *curr_map = map;
         struct symbol *pos;
         int count = 0;
@@ -510,15 +508,33 @@ static int dso__split_kallsyms(struct dso *self, struct map *map,
                         *module++ = '\0';
 
                         if (strcmp(curr_map->dso->short_name, module)) {
-                                curr_map = map_groups__find_by_name(kmaps, map->type, module);
+                                if (curr_map != map &&
+                                    self->kernel == DSO_TYPE_GUEST_KERNEL &&
+                                    machine__is_default_guest(machine)) {
+                                        /*
+                                         * We assume all symbols of a module are
+                                         * continuous in * kallsyms, so curr_map
+                                         * points to a module and all its
+                                         * symbols are in its kmap. Mark it as
+                                         * loaded.
+                                         */
+                                        dso__set_loaded(curr_map->dso,
+                                                        curr_map->type);
+                                }
+
+                                curr_map = map_groups__find_by_name(kmaps,
+                                                        map->type, module);
                                 if (curr_map == NULL) {
-                                        pr_debug("/proc/{kallsyms,modules} "
+                                        pr_debug("%s/proc/{kallsyms,modules} "
                                                  "inconsistency while looking "
-                                                 "for \"%s\" module!\n", module);
-                                        return -1;
+                                                 "for \"%s\" module!\n",
+                                                 machine->root_dir, module);
+                                        curr_map = map;
+                                        goto discard_symbol;
                                 }
 
-                                if (curr_map->dso->loaded)
+                                if (curr_map->dso->loaded &&
+                                    !machine__is_default_guest(machine))
                                         goto discard_symbol;
                         }
                         /*
@@ -531,13 +547,21 @@ static int dso__split_kallsyms(struct dso *self, struct map *map,
                         char dso_name[PATH_MAX];
                         struct dso *dso;
 
-                        snprintf(dso_name, sizeof(dso_name), "[kernel].%d",
-                                 kernel_range++);
+                        if (self->kernel == DSO_TYPE_GUEST_KERNEL)
+                                snprintf(dso_name, sizeof(dso_name),
+                                        "[guest.kernel].%d",
+                                        kernel_range++);
+                        else
+                                snprintf(dso_name, sizeof(dso_name),
+                                        "[kernel].%d",
+                                        kernel_range++);
 
                         dso = dso__new(dso_name);
                         if (dso == NULL)
                                 return -1;
 
+                        dso->kernel = self->kernel;
+
                         curr_map = map__new2(pos->start, dso, map->type);
                         if (curr_map == NULL) {
                                 dso__delete(dso);
@@ -561,6 +585,12 @@ discard_symbol:		rb_erase(&pos->rb_node, root);
                 }
         }
 
+        if (curr_map != map &&
+            self->kernel == DSO_TYPE_GUEST_KERNEL &&
+            machine__is_default_guest(kmaps->machine)) {
+                dso__set_loaded(curr_map->dso, curr_map->type);
+        }
+
         return count;
 }
 
@@ -571,7 +601,10 @@ int dso__load_kallsyms(struct dso *self, const char *filename,
                 return -1;
 
         symbols__fixup_end(&self->symbols[map->type]);
-        self->origin = DSO__ORIG_KERNEL;
+        if (self->kernel == DSO_TYPE_GUEST_KERNEL)
+                self->origin = DSO__ORIG_GUEST_KERNEL;
+        else
+                self->origin = DSO__ORIG_KERNEL;
 
         return dso__split_kallsyms(self, map, filter);
 }
@@ -870,8 +903,8 @@ out_close:
         if (err == 0)
                 return nr;
 out:
-        pr_warning("%s: problems reading %s PLT info.\n",
-                   __func__, self->long_name);
+        pr_debug("%s: problems reading %s PLT info.\n",
+                 __func__, self->long_name);
         return 0;
 }
 
@@ -958,7 +991,7 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
         nr_syms = shdr.sh_size / shdr.sh_entsize;
 
         memset(&sym, 0, sizeof(sym));
-        if (!self->kernel) {
+        if (self->kernel == DSO_TYPE_USER) {
                 self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
                                 elf_section_by_name(elf, &ehdr, &shdr,
                                                      ".gnu.prelink_undo",
@@ -990,7 +1023,7 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
 
                 section_name = elf_sec__name(&shdr, secstrs);
 
-                if (self->kernel || kmodule) {
+                if (self->kernel != DSO_TYPE_USER || kmodule) {
                         char dso_name[PATH_MAX];
 
                         if (strcmp(section_name,
@@ -1017,6 +1050,7 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
                                 curr_dso = dso__new(dso_name);
                                 if (curr_dso == NULL)
                                         goto out_elf_end;
+                                curr_dso->kernel = self->kernel;
                                 curr_map = map__new2(start, curr_dso,
                                                      map->type);
                                 if (curr_map == NULL) {
@@ -1025,9 +1059,9 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
                                 }
                                 curr_map->map_ip = identity__map_ip;
                                 curr_map->unmap_ip = identity__map_ip;
-                                curr_dso->origin = DSO__ORIG_KERNEL;
+                                curr_dso->origin = self->origin;
                                 map_groups__insert(kmap->kmaps, curr_map);
-                                dsos__add(&dsos__kernel, curr_dso);
+                                dsos__add(&self->node, curr_dso);
                                 dso__set_loaded(curr_dso, map->type);
                         } else
                                 curr_dso = curr_map->dso;
@@ -1089,7 +1123,7 @@ static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
         return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
 }
 
-static bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
+bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
 {
         bool have_build_id = false;
         struct dso *pos;
@@ -1107,13 +1141,6 @@ static bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
         return have_build_id;
 }
 
-bool dsos__read_build_ids(bool with_hits)
-{
-        bool kbuildids = __dsos__read_build_ids(&dsos__kernel, with_hits),
-             ubuildids = __dsos__read_build_ids(&dsos__user, with_hits);
-        return kbuildids || ubuildids;
-}
-
 /*
  * Align offset to 4 bytes as needed for note name and descriptor data.
  */
@@ -1248,6 +1275,8 @@ char dso__symtab_origin(const struct dso *self)
                 [DSO__ORIG_BUILDID] =  'b',
                 [DSO__ORIG_DSO] =      'd',
                 [DSO__ORIG_KMODULE] =  'K',
+                [DSO__ORIG_GUEST_KERNEL] =  'g',
+                [DSO__ORIG_GUEST_KMODULE] =  'G',
         };
 
         if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
@@ -1263,11 +1292,20 @@ int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
         char build_id_hex[BUILD_ID_SIZE * 2 + 1];
         int ret = -1;
         int fd;
+        struct machine *machine;
+        const char *root_dir;
 
         dso__set_loaded(self, map->type);
 
-        if (self->kernel)
+        if (self->kernel == DSO_TYPE_KERNEL)
                 return dso__load_kernel_sym(self, map, filter);
+        else if (self->kernel == DSO_TYPE_GUEST_KERNEL)
+                return dso__load_guest_kernel_sym(self, map, filter);
+
+        if (map->groups && map->groups->machine)
+                machine = map->groups->machine;
+        else
+                machine = NULL;
 
         name = malloc(size);
         if (!name)
@@ -1321,6 +1359,13 @@ more:
                 case DSO__ORIG_DSO:
                         snprintf(name, size, "%s", self->long_name);
                         break;
+                case DSO__ORIG_GUEST_KMODULE:
+                        if (map->groups && map->groups->machine)
+                                root_dir = map->groups->machine->root_dir;
+                        else
+                                root_dir = "";
+                        snprintf(name, size, "%s%s", root_dir, self->long_name);
+                        break;
 
                 default:
                         goto out;
@@ -1374,7 +1419,8 @@ struct map *map_groups__find_by_name(struct map_groups *self,
         return NULL;
 }
 
-static int dso__kernel_module_get_build_id(struct dso *self)
+static int dso__kernel_module_get_build_id(struct dso *self,
+                                const char *root_dir)
 {
         char filename[PATH_MAX];
         /*
@@ -1384,8 +1430,8 @@ static int dso__kernel_module_get_build_id(struct dso *self)
         const char *name = self->short_name + 1;
 
         snprintf(filename, sizeof(filename),
-                 "/sys/module/%.*s/notes/.note.gnu.build-id",
-                 (int)strlen(name - 1), name);
+                 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
+                 root_dir, (int)strlen(name) - 1, name);
 
         if (sysfs__read_build_id(filename, self->build_id,
                                  sizeof(self->build_id)) == 0)
@@ -1394,26 +1440,33 @@ static int dso__kernel_module_get_build_id(struct dso *self)
         return 0;
 }
 
-static int map_groups__set_modules_path_dir(struct map_groups *self, char *dirname)
+static int map_groups__set_modules_path_dir(struct map_groups *self,
+                                const char *dir_name)
 {
         struct dirent *dent;
-        DIR *dir = opendir(dirname);
+        DIR *dir = opendir(dir_name);
 
         if (!dir) {
-                pr_debug("%s: cannot open %s dir\n", __func__, dirname);
+                pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
                 return -1;
         }
 
         while ((dent = readdir(dir)) != NULL) {
                 char path[PATH_MAX];
+                struct stat st;
 
-                if (dent->d_type == DT_DIR) {
+                /*sshfs might return bad dent->d_type, so we have to stat*/
+                sprintf(path, "%s/%s", dir_name, dent->d_name);
+                if (stat(path, &st))
+                        continue;
+
+                if (S_ISDIR(st.st_mode)) {
                         if (!strcmp(dent->d_name, ".") ||
                             !strcmp(dent->d_name, ".."))
                                 continue;
 
                         snprintf(path, sizeof(path), "%s/%s",
-                                 dirname, dent->d_name);
+                                 dir_name, dent->d_name);
                         if (map_groups__set_modules_path_dir(self, path) < 0)
                                 goto failure;
                 } else {
@@ -1433,13 +1486,13 @@ static int map_groups__set_modules_path_dir(struct map_groups *self, char *dirna
                                 continue;
 
                         snprintf(path, sizeof(path), "%s/%s",
-                                 dirname, dent->d_name);
+                                 dir_name, dent->d_name);
 
                         long_name = strdup(path);
                         if (long_name == NULL)
                                 goto failure;
                         dso__set_long_name(map->dso, long_name);
-                        dso__kernel_module_get_build_id(map->dso);
+                        dso__kernel_module_get_build_id(map->dso, "");
                 }
         }
 
@@ -1449,18 +1502,47 @@ failure:
         return -1;
 }
 
-static int map_groups__set_modules_path(struct map_groups *self)
+static char *get_kernel_version(const char *root_dir)
 {
-        struct utsname uts;
+        char version[PATH_MAX];
+        FILE *file;
+        char *name, *tmp;
+        const char *prefix = "Linux version ";
+
+        sprintf(version, "%s/proc/version", root_dir);
+        file = fopen(version, "r");
+        if (!file)
+                return NULL;
+
+        version[0] = '\0';
+        tmp = fgets(version, sizeof(version), file);
+        fclose(file);
+
+        name = strstr(version, prefix);
+        if (!name)
+                return NULL;
+        name += strlen(prefix);
+        tmp = strchr(name, ' ');
+        if (tmp)
+                *tmp = '\0';
+
+        return strdup(name);
+}
+
+static int machine__set_modules_path(struct machine *self)
+{
+        char *version;
         char modules_path[PATH_MAX];
 
-        if (uname(&uts) < 0)
+        version = get_kernel_version(self->root_dir);
+        if (!version)
                 return -1;
 
-        snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel",
-                 uts.release);
+        snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
+                 self->root_dir, version);
+        free(version);
 
-        return map_groups__set_modules_path_dir(self, modules_path);
+        return map_groups__set_modules_path_dir(&self->kmaps, modules_path);
 }
 
 /*
@@ -1470,8 +1552,8 @@ static int map_groups__set_modules_path(struct map_groups *self)
  */
 static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
 {
-        struct map *self = zalloc(sizeof(*self) +
-                                  (dso->kernel ? sizeof(struct kmap) : 0));
+        struct map *self = calloc(1, (sizeof(*self) +
+                                      (dso->kernel ? sizeof(struct kmap) : 0)));
         if (self != NULL) {
                 /*
                  * ->end will be filled after we load all the symbols
@@ -1482,11 +1564,11 @@ static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
         return self;
 }
 
-struct map *map_groups__new_module(struct map_groups *self, u64 start,
-                                   const char *filename)
+struct map *machine__new_module(struct machine *self, u64 start,
+                                const char *filename)
 {
         struct map *map;
-        struct dso *dso = __dsos__findnew(&dsos__kernel, filename);
+        struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename);
 
         if (dso == NULL)
                 return NULL;
@@ -1495,18 +1577,31 @@ struct map *map_groups__new_module(struct map_groups *self, u64 start,
         if (map == NULL)
                 return NULL;
 
-        dso->origin = DSO__ORIG_KMODULE;
-        map_groups__insert(self, map);
+        if (machine__is_host(self))
+                dso->origin = DSO__ORIG_KMODULE;
+        else
+                dso->origin = DSO__ORIG_GUEST_KMODULE;
+        map_groups__insert(&self->kmaps, map);
         return map;
 }
 
-static int map_groups__create_modules(struct map_groups *self)
+static int machine__create_modules(struct machine *self)
 {
         char *line = NULL;
         size_t n;
-        FILE *file = fopen("/proc/modules", "r");
+        FILE *file;
         struct map *map;
+        const char *modules;
+        char path[PATH_MAX];
+
+        if (machine__is_default_guest(self))
+                modules = symbol_conf.default_guest_modules;
+        else {
+                sprintf(path, "%s/proc/modules", self->root_dir);
+                modules = path;
+        }
 
+        file = fopen(modules, "r");
         if (file == NULL)
                 return -1;
 
@@ -1538,16 +1633,16 @@ static int map_groups__create_modules(struct map_groups *self)
                 *sep = '\0';
 
                 snprintf(name, sizeof(name), "[%s]", line);
-                map = map_groups__new_module(self, start, name);
+                map = machine__new_module(self, start, name);
                 if (map == NULL)
                         goto out_delete_line;
-                dso__kernel_module_get_build_id(map->dso);
+                dso__kernel_module_get_build_id(map->dso, self->root_dir);
         }
 
         free(line);
         fclose(file);
 
-        return map_groups__set_modules_path(self);
+        return machine__set_modules_path(self);
 
 out_delete_line:
         free(line);
@@ -1714,8 +1809,56 @@ out_fixup:
         return err;
 }
 
-LIST_HEAD(dsos__user);
-LIST_HEAD(dsos__kernel);
+static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
+                                symbol_filter_t filter)
+{
+        int err;
+        const char *kallsyms_filename = NULL;
+        struct machine *machine;
+        char path[PATH_MAX];
+
+        if (!map->groups) {
+                pr_debug("Guest kernel map hasn't the point to groups\n");
+                return -1;
+        }
+        machine = map->groups->machine;
+
+        if (machine__is_default_guest(machine)) {
+                /*
+                 * if the user specified a vmlinux filename, use it and only
+                 * it, reporting errors to the user if it cannot be used.
+                 * Or use file guest_kallsyms inputted by user on commandline
+                 */
+                if (symbol_conf.default_guest_vmlinux_name != NULL) {
+                        err = dso__load_vmlinux(self, map,
+                                symbol_conf.default_guest_vmlinux_name, filter);
+                        goto out_try_fixup;
+                }
+
+                kallsyms_filename = symbol_conf.default_guest_kallsyms;
+                if (!kallsyms_filename)
+                        return -1;
+        } else {
+                sprintf(path, "%s/proc/kallsyms", machine->root_dir);
+                kallsyms_filename = path;
+        }
+
+        err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
+        if (err > 0)
+                pr_debug("Using %s for symbols\n", kallsyms_filename);
+
+out_try_fixup:
+        if (err > 0) {
+                if (kallsyms_filename != NULL) {
+                        machine__mmap_name(machine, path, sizeof(path));
+                        dso__set_long_name(self, strdup(path));
+                }
+                map__fixup_start(map);
+                map__fixup_end(map);
+        }
+
+        return err;
+}
 
 static void dsos__add(struct list_head *head, struct dso *dso)
 {
@@ -1747,21 +1890,32 @@ struct dso *__dsos__findnew(struct list_head *head, const char *name)
         return dso;
 }
 
-static void __dsos__fprintf(struct list_head *head, FILE *fp)
+size_t __dsos__fprintf(struct list_head *head, FILE *fp)
 {
         struct dso *pos;
+        size_t ret = 0;
 
         list_for_each_entry(pos, head, node) {
                 int i;
                 for (i = 0; i < MAP__NR_TYPES; ++i)
-                        dso__fprintf(pos, i, fp);
+                        ret += dso__fprintf(pos, i, fp);
         }
+
+        return ret;
 }
 
-void dsos__fprintf(FILE *fp)
+size_t machines__fprintf_dsos(struct rb_root *self, FILE *fp)
 {
-        __dsos__fprintf(&dsos__kernel, fp);
-        __dsos__fprintf(&dsos__user, fp);
+        struct rb_node *nd;
+        size_t ret = 0;
+
+        for (nd = rb_first(self); nd; nd = rb_next(nd)) {
+                struct machine *pos = rb_entry(nd, struct machine, rb_node);
+                ret += __dsos__fprintf(&pos->kernel_dsos, fp);
+                ret += __dsos__fprintf(&pos->user_dsos, fp);
+        }
+
+        return ret;
 }
 
 static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
@@ -1779,10 +1933,17 @@ static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
         return ret;
 }
 
-size_t dsos__fprintf_buildid(FILE *fp, bool with_hits)
+size_t machines__fprintf_dsos_buildid(struct rb_root *self, FILE *fp, bool with_hits)
 {
-        return (__dsos__fprintf_buildid(&dsos__kernel, fp, with_hits) +
-                __dsos__fprintf_buildid(&dsos__user, fp, with_hits));
+        struct rb_node *nd;
+        size_t ret = 0;
+
+        for (nd = rb_first(self); nd; nd = rb_next(nd)) {
+                struct machine *pos = rb_entry(nd, struct machine, rb_node);
+                ret += __dsos__fprintf_buildid(&pos->kernel_dsos, fp, with_hits);
+                ret += __dsos__fprintf_buildid(&pos->user_dsos, fp, with_hits);
+        }
+        return ret;
 }
 
 struct dso *dso__new_kernel(const char *name)
@@ -1791,55 +1952,98 @@ struct dso *dso__new_kernel(const char *name)
 
         if (self != NULL) {
                 dso__set_short_name(self, "[kernel]");
-                self->kernel     = 1;
+                self->kernel = DSO_TYPE_KERNEL;
         }
 
         return self;
 }
 
-void dso__read_running_kernel_build_id(struct dso *self)
+static struct dso *dso__new_guest_kernel(struct machine *machine,
+                                        const char *name)
 {
-        if (sysfs__read_build_id("/sys/kernel/notes", self->build_id,
+        char bf[PATH_MAX];
+        struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf)));
+
+        if (self != NULL) {
+                dso__set_short_name(self, "[guest.kernel]");
+                self->kernel = DSO_TYPE_GUEST_KERNEL;
+        }
+
+        return self;
+}
+
+void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine)
+{
+        char path[PATH_MAX];
+
+        if (machine__is_default_guest(machine))
+                return;
+        sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
+        if (sysfs__read_build_id(path, self->build_id,
                                  sizeof(self->build_id)) == 0)
                 self->has_build_id = true;
 }
 
-static struct dso *dsos__create_kernel(const char *vmlinux)
+static struct dso *machine__create_kernel(struct machine *self)
 {
-        struct dso *kernel = dso__new_kernel(vmlinux);
+        const char *vmlinux_name = NULL;
+        struct dso *kernel;
 
-        if (kernel != NULL) {
-                dso__read_running_kernel_build_id(kernel);
-                dsos__add(&dsos__kernel, kernel);
+        if (machine__is_host(self)) {
+                vmlinux_name = symbol_conf.vmlinux_name;
+                kernel = dso__new_kernel(vmlinux_name);
+        } else {
+                if (machine__is_default_guest(self))
+                        vmlinux_name = symbol_conf.default_guest_vmlinux_name;
+                kernel = dso__new_guest_kernel(self, vmlinux_name);
         }
 
+        if (kernel != NULL) {
+                dso__read_running_kernel_build_id(kernel, self);
+                dsos__add(&self->kernel_dsos, kernel);
+        }
         return kernel;
 }
 
-int __map_groups__create_kernel_maps(struct map_groups *self,
-                                     struct map *vmlinux_maps[MAP__NR_TYPES],
-                                     struct dso *kernel)
+int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
 {
         enum map_type type;
 
         for (type = 0; type < MAP__NR_TYPES; ++type) {
                 struct kmap *kmap;
 
-                vmlinux_maps[type] = map__new2(0, kernel, type);
-                if (vmlinux_maps[type] == NULL)
+                self->vmlinux_maps[type] = map__new2(0, kernel, type);
+                if (self->vmlinux_maps[type] == NULL)
                         return -1;
 
-                vmlinux_maps[type]->map_ip =
-                        vmlinux_maps[type]->unmap_ip = identity__map_ip;
+                self->vmlinux_maps[type]->map_ip =
+                        self->vmlinux_maps[type]->unmap_ip = identity__map_ip;
 
-                kmap = map__kmap(vmlinux_maps[type]);
-                kmap->kmaps = self;
-                map_groups__insert(self, vmlinux_maps[type]);
+                kmap = map__kmap(self->vmlinux_maps[type]);
+                kmap->kmaps = &self->kmaps;
+                map_groups__insert(&self->kmaps, self->vmlinux_maps[type]);
         }
 
         return 0;
 }
 
+int machine__create_kernel_maps(struct machine *self)
+{
+        struct dso *kernel = machine__create_kernel(self);
+
+        if (kernel == NULL ||
+            __machine__create_kernel_maps(self, kernel) < 0)
+                return -1;
+
+        if (symbol_conf.use_modules && machine__create_modules(self) < 0)
+                pr_debug("Problems creating module maps, continuing anyway...\n");
+        /*
+         * Now that we have all the maps created, just set the ->end of them:
+         */
+        map_groups__fixup_end(&self->kmaps);
+        return 0;
+}
+
 static void vmlinux_path__exit(void)
 {
         while (--vmlinux_path__nr_entries >= 0) {
@@ -1895,6 +2099,17 @@ out_fail:
         return -1;
 }
 
+size_t vmlinux_path__fprintf(FILE *fp)
+{
+        int i;
+        size_t printed = 0;
+
+        for (i = 0; i < vmlinux_path__nr_entries; ++i)
+                printed += fprintf(fp, "[%d] %s\n", i, vmlinux_path[i]);
+
+        return printed;
+}
+
 static int setup_list(struct strlist **list, const char *list_str,
                       const char *list_name)
 {
@@ -1945,22 +2160,129 @@ out_free_comm_list:
         return -1;
 }
 
-int map_groups__create_kernel_maps(struct map_groups *self,
-                                   struct map *vmlinux_maps[MAP__NR_TYPES])
+int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
 {
-        struct dso *kernel = dsos__create_kernel(symbol_conf.vmlinux_name);
+        struct machine *machine = machines__findnew(self, pid);
 
-        if (kernel == NULL)
+        if (machine == NULL)
                 return -1;
 
-        if (__map_groups__create_kernel_maps(self, vmlinux_maps, kernel) < 0)
-                return -1;
+        return machine__create_kernel_maps(machine);
+}
 
-        if (symbol_conf.use_modules && map_groups__create_modules(self) < 0)
-                pr_debug("Problems creating module maps, continuing anyway...\n");
-        /*
-         * Now that we have all the maps created, just set the ->end of them:
-         */
-        map_groups__fixup_end(self);
-        return 0;
+static int hex(char ch)
+{
+        if ((ch >= '0') && (ch <= '9'))
+                return ch - '0';
+        if ((ch >= 'a') && (ch <= 'f'))
+                return ch - 'a' + 10;
+        if ((ch >= 'A') && (ch <= 'F'))
+                return ch - 'A' + 10;
+        return -1;
+}
+
+/*
+ * While we find nice hex chars, build a long_val.
+ * Return number of chars processed.
+ */
+int hex2u64(const char *ptr, u64 *long_val)
+{
+        const char *p = ptr;
+        *long_val = 0;
+
+        while (*p) {
+                const int hex_val = hex(*p);
+
+                if (hex_val < 0)
+                        break;
+
+                *long_val = (*long_val << 4) | hex_val;
+                p++;
+        }
+
+        return p - ptr;
+}
+
+char *strxfrchar(char *s, char from, char to)
+{
+        char *p = s;
+
+        while ((p = strchr(p, from)) != NULL)
+                *p++ = to;
+
+        return s;
+}
+
+int machines__create_guest_kernel_maps(struct rb_root *self)
+{
+        int ret = 0;
+        struct dirent **namelist = NULL;
+        int i, items = 0;
+        char path[PATH_MAX];
+        pid_t pid;
+
+        if (symbol_conf.default_guest_vmlinux_name ||
+            symbol_conf.default_guest_modules ||
+            symbol_conf.default_guest_kallsyms) {
+                machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID);
+        }
+
+        if (symbol_conf.guestmount) {
+                items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
+                if (items <= 0)
+                        return -ENOENT;
+                for (i = 0; i < items; i++) {
+                        if (!isdigit(namelist[i]->d_name[0])) {
+                                /* Filter out . and .. */
+                                continue;
+                        }
+                        pid = atoi(namelist[i]->d_name);
+                        sprintf(path, "%s/%s/proc/kallsyms",
+                                symbol_conf.guestmount,
+                                namelist[i]->d_name);
+                        ret = access(path, R_OK);
+                        if (ret) {
+                                pr_debug("Can't access file %s\n", path);
+                                goto failure;
+                        }
+                        machines__create_kernel_maps(self, pid);
+                }
+failure:
+                free(namelist);
+        }
+
+        return ret;
+}
+
+int machine__load_kallsyms(struct machine *self, const char *filename,
+                           enum map_type type, symbol_filter_t filter)
+{
+        struct map *map = self->vmlinux_maps[type];
+        int ret = dso__load_kallsyms(map->dso, filename, map, filter);
+
+        if (ret > 0) {
+                dso__set_loaded(map->dso, type);
+                /*
+                 * Since /proc/kallsyms will have multiple sessions for the
+                 * kernel, with modules between them, fixup the end of all
+                 * sections.
+                 */
+                __map_groups__fixup_end(&self->kmaps, type);
+        }
+
+        return ret;
+}
+
+int machine__load_vmlinux_path(struct machine *self, enum map_type type,
+                               symbol_filter_t filter)
+{
+        struct map *map = self->vmlinux_maps[type];
+        int ret = dso__load_vmlinux_path(map->dso, map, filter);
+
+        if (ret > 0) {
+                dso__set_loaded(map->dso, type);
+                map__reloc_vmlinux(map);
+        }
+
+        return ret;
 }