Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:

 - Make /sys/devices/cpu/rdpmc based RDPMC enforcement more
   instantaneous

 - decoder: Update the Intel opcode map

 - Various tooling fixes, including a few late optimizations and
   cleanups.

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  perf script: Fix invalid LBR/binary mismatch error
  perf script: Fix brstackinsn for AUXTRACE
  perf affinity: Add infrastructure to save/restore affinity
  perf pmu: Use file system cache to optimize sysfs access
  perf regs: Make perf_reg_name() return "unknown" instead of NULL
  perf diff: Use llabs() with 64-bit values
  perf diff: Use llabs() with 64-bit values
  perf/x86: Implement immediate enforcement of /sys/devices/cpu/rdpmc value of 0
  perf tools: Allow to link with libbpf dynamicaly
  perf tests: Rename tests/map_groups.c to tests/maps.c
  perf tests: Rename thread-mg-share to thread-maps-share
  perf maps: Rename map_groups.h to maps.h
  perf maps: Rename 'mg' variables to 'maps'
  perf map_symbol: Rename ms->mg to ms->maps
  perf addr_location: Rename al->mg to al->maps
  perf thread: Rename thread->mg to thread->maps
  perf maps: Merge 'struct maps' with 'struct map_groups'
  x86/insn: perf tools: Add some more instructions to the new instructions test
  x86/insn: Add some more Intel instructions to the opcode map
  perf map: Remove unused functions
  ...

38 files changed, 527 insertions, 521 deletions

diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index b8e05a147b2b..07da6c790b63 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -49,6 +49,7 @@ perf-y += header.o
 perf-y += callchain.o
 perf-y += values.o
 perf-y += debug.o
+perf-y += fncache.o
 perf-y += machine.o
 perf-y += map.o
 perf-y += pstack.o
@@ -76,6 +77,7 @@ perf-y += sort.o
 perf-y += hist.o
 perf-y += util.o
 perf-y += cpumap.o
+perf-y += affinity.o
 perf-y += cputopo.o
 perf-y += cgroup.o
 perf-y += target.o
diff --git a/tools/perf/util/affinity.c b/tools/perf/util/affinity.c
new file mode 100644
index 000000000000..a5e31f826828
--- /dev/null
+++ b/tools/perf/util/affinity.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Manage affinity to optimize IPIs inside the kernel perf API. */
+#define _GNU_SOURCE 1
+#include <sched.h>
+#include <stdlib.h>
+#include <linux/bitmap.h>
+#include <linux/zalloc.h>
+#include "perf.h"
+#include "cpumap.h"
+#include "affinity.h"
+
+static int get_cpu_set_size(void)
+{
+	int sz = cpu__max_cpu() + 8 - 1;
+	/*
+	 * sched_getaffinity doesn't like masks smaller than the kernel.
+	 * Hopefully that's big enough.
+	 */
+	if (sz < 4096)
+		sz = 4096;
+	return sz / 8;
+}
+
+int affinity__setup(struct affinity *a)
+{
+	int cpu_set_size = get_cpu_set_size();
+
+	a->orig_cpus = bitmap_alloc(cpu_set_size * 8);
+	if (!a->orig_cpus)
+		return -1;
+	sched_getaffinity(0, cpu_set_size, (cpu_set_t *)a->orig_cpus);
+	a->sched_cpus = bitmap_alloc(cpu_set_size * 8);
+	if (!a->sched_cpus) {
+		zfree(&a->orig_cpus);
+		return -1;
+	}
+	bitmap_zero((unsigned long *)a->sched_cpus, cpu_set_size);
+	a->changed = false;
+	return 0;
+}
+
+/*
+ * perf_event_open does an IPI internally to the target CPU.
+ * It is more efficient to change perf's affinity to the target
+ * CPU and then set up all events on that CPU, so we amortize
+ * CPU communication.
+ */
+void affinity__set(struct affinity *a, int cpu)
+{
+	int cpu_set_size = get_cpu_set_size();
+
+	if (cpu == -1)
+		return;
+	a->changed = true;
+	set_bit(cpu, a->sched_cpus);
+	/*
+	 * We ignore errors because affinity is just an optimization.
+	 * This could happen for example with isolated CPUs or cpusets.
+	 * In this case the IPIs inside the kernel's perf API still work.
+	 */
+	sched_setaffinity(0, cpu_set_size, (cpu_set_t *)a->sched_cpus);
+	clear_bit(cpu, a->sched_cpus);
+}
+
+void affinity__cleanup(struct affinity *a)
+{
+	int cpu_set_size = get_cpu_set_size();
+
+	if (a->changed)
+		sched_setaffinity(0, cpu_set_size, (cpu_set_t *)a->orig_cpus);
+	zfree(&a->sched_cpus);
+	zfree(&a->orig_cpus);
+}
diff --git a/tools/perf/util/affinity.h b/tools/perf/util/affinity.h
new file mode 100644
index 000000000000..0ad6a18ef20c
--- /dev/null
+++ b/tools/perf/util/affinity.h
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef PERF_AFFINITY_H
+#define PERF_AFFINITY_H 1
+
+#include <stdbool.h>
+
+struct affinity {
+	unsigned long *orig_cpus;
+	unsigned long *sched_cpus;
+	bool changed;
+};
+
+void affinity__cleanup(struct affinity *a);
+void affinity__set(struct affinity *a, int cpu);
+int affinity__setup(struct affinity *a);
+
+#endif // PERF_AFFINITY_H
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 5ea9a4534848..f5e77ed237e8 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -23,7 +23,7 @@
 #include "dso.h"
 #include "env.h"
 #include "map.h"
-#include "map_groups.h"
+#include "maps.h"
 #include "symbol.h"
 #include "srcline.h"
 #include "units.h"
@@ -271,7 +271,7 @@ static int call__parse(struct arch *arch, struct ins_operands *ops, struct map_s
 find_target:
 	target.addr = map__objdump_2mem(map, ops->target.addr);
 
-	if (map_groups__find_ams(ms->mg, &target) == 0 &&
+	if (maps__find_ams(ms->maps, &target) == 0 &&
 	    map__rip_2objdump(target.ms.map, map->map_ip(target.ms.map, target.addr)) == ops->target.addr)
 		ops->target.sym = target.ms.sym;
 
@@ -391,7 +391,7 @@ static int jump__parse(struct arch *arch, struct ins_operands *ops, struct map_s
 	 * Actual navigation will come next, with further understanding of how
 	 * the symbol searching and disassembly should be done.
 	 */
-	if (map_groups__find_ams(ms->mg, &target) == 0 &&
+	if (maps__find_ams(ms->maps, &target) == 0 &&
 	    map__rip_2objdump(target.ms.map, map->map_ip(target.ms.map, target.addr)) == ops->target.addr)
 		ops->target.sym = target.ms.sym;
 
@@ -1545,7 +1545,7 @@ static int symbol__parse_objdump_line(struct symbol *sym,
 			.ms = { .map = map, },
 		};
 
-		if (!map_groups__find_ams(args->ms.mg, &target) &&
+		if (!maps__find_ams(args->ms.maps, &target) &&
 		    target.ms.sym->start == target.al_addr)
 			dl->ops.target.sym = target.ms.sym;
 	}
diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c
index f7ed5d122e22..a3207d900339 100644
--- a/tools/perf/util/bpf-event.c
+++ b/tools/perf/util/bpf-event.c
@@ -52,9 +52,7 @@ static int machine__process_bpf_event_load(struct machine *machine,
 	for (i = 0; i < info_linear->info.nr_jited_ksyms; i++) {
 		u64 *addrs = (u64 *)(uintptr_t)(info_linear->info.jited_ksyms);
 		u64 addr = addrs[i];
-		struct map *map;
-
-		map = map_groups__find(&machine->kmaps, addr);
+		struct map *map = maps__find(&machine->kmaps, addr);
 
 		if (map) {
 			map->dso->binary_type = DSO_BINARY_TYPE__BPF_PROG_INFO;
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 5cefce33b66b..818aa4efd386 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -1106,7 +1106,7 @@ int hist_entry__append_callchain(struct hist_entry *he, struct perf_sample *samp
 int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *node,
 			bool hide_unresolved)
 {
-	al->mg	= node->ms.mg;
+	al->maps = node->ms.maps;
 	al->map = node->ms.map;
 	al->sym = node->ms.sym;
 	al->srcline = node->srcline;
@@ -1119,8 +1119,8 @@ int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *
 			goto out;
 	}
 
-	if (al->mg == &al->mg->machine->kmaps) {
-		if (machine__is_host(al->mg->machine)) {
+	if (al->maps == &al->maps->machine->kmaps) {
+		if (machine__is_host(al->maps->machine)) {
 			al->cpumode = PERF_RECORD_MISC_KERNEL;
 			al->level = 'k';
 		} else {
@@ -1128,7 +1128,7 @@ int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *
 			al->level = 'g';
 		}
 	} else {
-		if (machine__is_host(al->mg->machine)) {
+		if (machine__is_host(al->maps->machine)) {
 			al->cpumode = PERF_RECORD_MISC_USER;
 			al->level = '.';
 		} else if (perf_guest) {
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index f5f855fff412..5471045ebf5c 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -2569,7 +2569,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
 	if (err)
 		goto err_delete_thread;
 
-	if (thread__init_map_groups(etm->unknown_thread, etm->machine)) {
+	if (thread__init_maps(etm->unknown_thread, etm->machine)) {
 		err = -ENOMEM;
 		goto err_delete_thread;
 	}
diff --git a/tools/perf/util/db-export.c b/tools/perf/util/db-export.c
index d029faf9fc9f..db7447154622 100644
--- a/tools/perf/util/db-export.c
+++ b/tools/perf/util/db-export.c
@@ -181,7 +181,7 @@ static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
 	if (al->map) {
 		struct dso *dso = al->map->dso;
 
-		err = db_export__dso(dbe, dso, al->mg->machine);
+		err = db_export__dso(dbe, dso, al->maps->machine);
 		if (err)
 			return err;
 		*dso_db_id = dso->db_id;
@@ -251,7 +251,7 @@ static struct call_path *call_path_from_sample(struct db_export *dbe,
 		 */
 		al.sym = node->ms.sym;
 		al.map = node->ms.map;
-		al.mg  = thread->mg;
+		al.maps = thread->maps;
 		al.addr = node->ip;
 
 		if (al.map && !al.sym)
@@ -360,13 +360,13 @@ int db_export__sample(struct db_export *dbe, union perf_event *event,
 	if (err)
 		return err;
 
-	err = db_export__machine(dbe, al->mg->machine);
+	err = db_export__machine(dbe, al->maps->machine);
 	if (err)
 		return err;
 
-	main_thread = thread__main_thread(al->mg->machine, thread);
+	main_thread = thread__main_thread(al->maps->machine, thread);
 
-	err = db_export__threads(dbe, thread, main_thread, al->mg->machine, &comm);
+	err = db_export__threads(dbe, thread, main_thread, al->maps->machine, &comm);
 	if (err)
 		goto out_put;
 
@@ -380,7 +380,7 @@ int db_export__sample(struct db_export *dbe, union perf_event *event,
 		goto out_put;
 
 	if (dbe->cpr) {
-		struct call_path *cp = call_path_from_sample(dbe, al->mg->machine,
+		struct call_path *cp = call_path_from_sample(dbe, al->maps->machine,
 							     thread, sample,
 							     evsel);
 		if (cp) {
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 0141b26bae47..c5447ff516a2 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -457,11 +457,11 @@ int perf_event__process(struct perf_tool *tool __maybe_unused,
 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
 			     struct addr_location *al)
 {
-	struct map_groups *mg = thread->mg;
-	struct machine *machine = mg->machine;
+	struct maps *maps = thread->maps;
+	struct machine *machine = maps->machine;
 	bool load_map = false;
 
-	al->mg = mg;
+	al->maps = maps;
 	al->thread = thread;
 	al->addr = addr;
 	al->cpumode = cpumode;
@@ -474,13 +474,13 @@ struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
 
 	if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 		al->level = 'k';
-		al->mg = mg = &machine->kmaps;
+		al->maps = maps = &machine->kmaps;
 		load_map = true;
 	} else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 		al->level = '.';
 	} else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 		al->level = 'g';
-		al->mg = mg = &machine->kmaps;
+		al->maps = maps = &machine->kmaps;
 		load_map = true;
 	} else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
 		al->level = 'u';
@@ -500,7 +500,7 @@ struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
 		return NULL;
 	}
 
-	al->map = map_groups__find(mg, al->addr);
+	al->map = maps__find(maps, al->addr);
 	if (al->map != NULL) {
 		/*
 		 * Kernel maps might be changed when loading symbols so loading
@@ -523,7 +523,7 @@ struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
 				struct addr_location *al)
 {
 	struct map *map = thread__find_map(thread, cpumode, addr, al);
-	struct machine *machine = thread->mg->machine;
+	struct machine *machine = thread->maps->machine;
 	u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
 
 	if (map || addr_cpumode == cpumode)
diff --git a/tools/perf/util/fncache.c b/tools/perf/util/fncache.c
new file mode 100644
index 000000000000..6225cbc52310
--- /dev/null
+++ b/tools/perf/util/fncache.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Manage a cache of file names' existence */
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <linux/list.h>
+#include "fncache.h"
+
+struct fncache {
+	struct hlist_node nd;
+	bool res;
+	char name[];
+};
+
+#define FNHSIZE 61
+
+static struct hlist_head fncache_hash[FNHSIZE];
+
+unsigned shash(const unsigned char *s)
+{
+	unsigned h = 0;
+	while (*s)
+		h = 65599 * h + *s++;
+	return h ^ (h >> 16);
+}
+
+static bool lookup_fncache(const char *name, bool *res)
+{
+	int h = shash((const unsigned char *)name) % FNHSIZE;
+	struct fncache *n;
+
+	hlist_for_each_entry(n, &fncache_hash[h], nd) {
+		if (!strcmp(n->name, name)) {
+			*res = n->res;
+			return true;
+		}
+	}
+	return false;
+}
+
+static void update_fncache(const char *name, bool res)
+{
+	struct fncache *n = malloc(sizeof(struct fncache) + strlen(name) + 1);
+	int h = shash((const unsigned char *)name) % FNHSIZE;
+
+	if (!n)
+		return;
+	strcpy(n->name, name);
+	n->res = res;
+	hlist_add_head(&n->nd, &fncache_hash[h]);
+}
+
+/* No LRU, only use when bounded in some other way. */
+bool file_available(const char *name)
+{
+	bool res;
+
+	if (lookup_fncache(name, &res))
+		return res;
+	res = access(name, R_OK) == 0;
+	update_fncache(name, res);
+	return res;
+}
diff --git a/tools/perf/util/fncache.h b/tools/perf/util/fncache.h
new file mode 100644
index 000000000000..fe020beaefb1
--- /dev/null
+++ b/tools/perf/util/fncache.h
@@ -0,0 +1,7 @@
+#ifndef _FCACHE_H
+#define _FCACHE_H 1
+
+unsigned shash(const unsigned char *s);
+bool file_available(const char *name);
+
+#endif
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 0a8d72ae93ca..ca5a8f4d007e 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -692,7 +692,7 @@ __hists__add_entry(struct hists *hists,
 			.ino = ns ? ns->link_info[CGROUP_NS_INDEX].ino : 0,
 		},
 		.ms = {
-			.mg	= al->mg,
+			.maps	= al->maps,
 			.map	= al->map,
 			.sym	= al->sym,
 		},
@@ -760,7 +760,7 @@ struct hist_entry *hists__add_entry_block(struct hists *hists,
 		.block_info = block_info,
 		.hists = hists,
 		.ms = {
-			.mg  = al->mg,
+			.maps = al->maps,
 			.map = al->map,
 			.sym = al->sym,
 		},
@@ -895,7 +895,7 @@ iter_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *al)
 	if (iter->curr >= iter->total)
 		return 0;
 
-	al->mg  = bi[i].to.ms.mg;
+	al->maps = bi[i].to.ms.maps;
 	al->map = bi[i].to.ms.map;
 	al->sym = bi[i].to.ms.sym;
 	al->addr = bi[i].to.addr;
@@ -1072,7 +1072,7 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter,
 		.comm = thread__comm(al->thread),
 		.ip = al->addr,
 		.ms = {
-			.mg  = al->mg,
+			.maps = al->maps,
 			.map = al->map,
 			.sym = al->sym,
 		},
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 409afc611be9..33cf8928cf05 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -3296,7 +3296,7 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
 	err = thread__set_comm(pt->unknown_thread, "unknown", 0);
 	if (err)
 		goto err_delete_thread;
-	if (thread__init_map_groups(pt->unknown_thread, pt->machine)) {
+	if (thread__init_maps(pt->unknown_thread, pt->machine)) {
 		err = -ENOMEM;
 		goto err_delete_thread;
 	}
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index e2a312c649f0..416d174d223c 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -86,7 +86,7 @@ int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
 	int err = -ENOMEM;
 
 	memset(machine, 0, sizeof(*machine));
-	map_groups__init(&machine->kmaps, machine);
+	maps__init(&machine->kmaps, machine);
 	RB_CLEAR_NODE(&machine->rb_node);
 	dsos__init(&machine->dsos);
 
@@ -217,7 +217,7 @@ void machine__exit(struct machine *machine)
 		return;
 
 	machine__destroy_kernel_maps(machine);
-	map_groups__exit(&machine->kmaps);
+	maps__exit(&machine->kmaps);
 	dsos__exit(&machine->dsos);
 	machine__exit_vdso(machine);
 	zfree(&machine->root_dir);
@@ -412,28 +412,28 @@ static void machine__update_thread_pid(struct machine *machine,
 	if (!leader)
 		goto out_err;
 
-	if (!leader->mg)
-		leader->mg = map_groups__new(machine);
+	if (!leader->maps)
+		leader->maps = maps__new(machine);
 
-	if (!leader->mg)
+	if (!leader->maps)
 		goto out_err;
 
-	if (th->mg == leader->mg)
+	if (th->maps == leader->maps)
 		return;
 
-	if (th->mg) {
+	if (th->maps) {
 		/*
 		 * Maps are created from MMAP events which provide the pid and
 		 * tid.  Consequently there never should be any maps on a thread
 		 * with an unknown pid.  Just print an error if there are.
 		 */
-		if (!map_groups__empty(th->mg))
+		if (!maps__empty(th->maps))
 			pr_err("Discarding thread maps for %d:%d\n",
 			       th->pid_, th->tid);
-		map_groups__put(th->mg);
+		maps__put(th->maps);
 	}
 
-	th->mg = map_groups__get(leader->mg);
+	th->maps = maps__get(leader->maps);
 out_put:
 	thread__put(leader);
 	return;
@@ -536,14 +536,13 @@ static struct thread *____machine__findnew_thread(struct machine *machine,
 		rb_insert_color_cached(&th->rb_node, &threads->entries, leftmost);
 
 		/*
-		 * We have to initialize map_groups separately
-		 * after rb tree is updated.
+		 * We have to initialize maps separately after rb tree is updated.
 		 *
 		 * The reason is that we call machine__findnew_thread
-		 * within thread__init_map_groups to find the thread
+		 * within thread__init_maps to find the thread
 		 * leader and that would screwed the rb tree.
 		 */
-		if (thread__init_map_groups(th, machine)) {
+		if (thread__init_maps(th, machine)) {
 			rb_erase_cached(&th->rb_node, &threads->entries);
 			RB_CLEAR_NODE(&th->rb_node);
 			thread__put(th);
@@ -724,9 +723,8 @@ static int machine__process_ksymbol_register(struct machine *machine,
 					     struct perf_sample *sample __maybe_unused)
 {
 	struct symbol *sym;
-	struct map *map;
+	struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr);
 
-	map = map_groups__find(&machine->kmaps, event->ksymbol.addr);
 	if (!map) {
 		map = dso__new_map(event->ksymbol.name);
 		if (!map)
@@ -734,7 +732,7 @@ static int machine__process_ksymbol_register(struct machine *machine,
 
 		map->start = event->ksymbol.addr;
 		map->end = map->start + event->ksymbol.len;
-		map_groups__insert(&machine->kmaps, map);
+		maps__insert(&machine->kmaps, map);
 	}
 
 	sym = symbol__new(map->map_ip(map, map->start),
@@ -752,9 +750,9 @@ static int machine__process_ksymbol_unregister(struct machine *machine,
 {
 	struct map *map;
 
-	map = map_groups__find(&machine->kmaps, event->ksymbol.addr);
+	map = maps__find(&machine->kmaps, event->ksymbol.addr);
 	if (map)
-		map_groups__remove(&machine->kmaps, map);
+		maps__remove(&machine->kmaps, map);
 
 	return 0;
 }
@@ -790,9 +788,9 @@ static struct map *machine__addnew_module_map(struct machine *machine, u64 start
 	if (map == NULL)
 		goto out;
 
-	map_groups__insert(&machine->kmaps, map);
+	maps__insert(&machine->kmaps, map);
 
-	/* Put the map here because map_groups__insert alread got it */
+	/* Put the map here because maps__insert alread got it */
 	map__put(map);
 out:
 	/* put the dso here, corresponding to  machine__findnew_module_dso */
@@ -977,7 +975,7 @@ int machine__create_extra_kernel_map(struct machine *machine,
 	kmap->kmaps = &machine->kmaps;
 	strlcpy(kmap->name, xm->name, KMAP_NAME_LEN);
 
-	map_groups__insert(&machine->kmaps, map);
+	maps__insert(&machine->kmaps, map);
 
 	pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n",
 		  kmap->name, map->start, map->end);
@@ -1022,8 +1020,7 @@ static u64 find_entry_trampoline(struct dso *dso)
 int machine__map_x86_64_entry_trampolines(struct machine *machine,
 					  struct dso *kernel)
 {
-	struct map_groups *kmaps = &machine->kmaps;
-	struct maps *maps = &kmaps->maps;
+	struct maps *kmaps = &machine->kmaps;
 	int nr_cpus_avail, cpu;
 	bool found = false;
 	struct map *map;
@@ -1033,14 +1030,14 @@ int machine__map_x86_64_entry_trampolines(struct machine *machine,
 	 * In the vmlinux case, pgoff is a virtual address which must now be
 	 * mapped to a vmlinux offset.
 	 */
-	maps__for_each_entry(maps, map) {
+	maps__for_each_entry(kmaps, map) {
 		struct kmap *kmap = __map__kmap(map);
 		struct map *dest_map;
 
 		if (!kmap || !is_entry_trampoline(kmap->name))
 			continue;
 
-		dest_map = map_groups__find(kmaps, map->pgoff);
+		dest_map = maps__find(kmaps, map->pgoff);
 		if (dest_map != map)
 			map->pgoff = dest_map->map_ip(dest_map, map->pgoff);
 		found = true;
@@ -1102,7 +1099,7 @@ __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
 		return -1;
 
 	kmap->kmaps = &machine->kmaps;
-	map_groups__insert(&machine->kmaps, map);
+	maps__insert(&machine->kmaps, map);
 
 	return 0;
 }
@@ -1116,7 +1113,7 @@ void machine__destroy_kernel_maps(struct machine *machine)
 		return;
 
 	kmap = map__kmap(map);
-	map_groups__remove(&machine->kmaps, map);
+	maps__remove(&machine->kmaps, map);
 	if (kmap && kmap->ref_reloc_sym) {
 		zfree((char **)&kmap->ref_reloc_sym->name);
 		zfree(&kmap->ref_reloc_sym);
@@ -1211,7 +1208,7 @@ int machine__load_kallsyms(struct machine *machine, const char *filename)
 		 * kernel, with modules between them, fixup the end of all
 		 * sections.
 		 */
-		map_groups__fixup_end(&machine->kmaps);
+		maps__fixup_end(&machine->kmaps);
 	}
 
 	return ret;
@@ -1262,11 +1259,10 @@ static bool is_kmod_dso(struct dso *dso)
 	       dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
 }
 
-static int map_groups__set_module_path(struct map_groups *mg, const char *path,
-				       struct kmod_path *m)
+static int maps__set_module_path(struct maps *maps, const char *path, struct kmod_path *m)
 {
 	char *long_name;
-	struct map *map = map_groups__find_by_name(mg, m->name);
+	struct map *map = maps__find_by_name(maps, m->name);
 
 	if (map == NULL)
 		return 0;
@@ -1290,8 +1286,7 @@ static int map_groups__set_module_path(struct map_groups *mg, const char *path,
 	return 0;
 }
 
-static int map_groups__set_modules_path_dir(struct map_groups *mg,
-				const char *dir_name, int depth)
+static int maps__set_modules_path_dir(struct maps *maps, const char *dir_name, int depth)
 {
 	struct dirent *dent;
 	DIR *dir = opendir(dir_name);
@@ -1323,8 +1318,7 @@ static int map_groups__set_modules_path_dir(struct map_groups *mg,
 					continue;
 			}
 
-			ret = map_groups__set_modules_path_dir(mg, path,
-							       depth + 1);
+			ret = maps__set_modules_path_dir(maps, path, depth + 1);
 			if (ret < 0)
 				goto out;
 		} else {
@@ -1335,7 +1329,7 @@ static int map_groups__set_modules_path_dir(struct map_groups *mg,
 				goto out;
 
 			if (m.kmod)
-				ret = map_groups__set_module_path(mg, path, &m);
+				ret = maps__set_module_path(maps, path, &m);
 
 			zfree(&m.name);
 
@@ -1362,7 +1356,7 @@ static int machine__set_modules_path(struct machine *machine)
 		 machine->root_dir, version);
 	free(version);
 
-	return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
+	return maps__set_modules_path_dir(&machine->kmaps, modules_path, 0);
 }
 int __weak arch__fix_module_text_start(u64 *start __maybe_unused,
 				u64 *size __maybe_unused,
@@ -1435,11 +1429,11 @@ static void machine__update_kernel_mmap(struct machine *machine,
 	struct map *map = machine__kernel_map(machine);
 
 	map__get(map);
-	map_groups__remove(&machine->kmaps, map);
+	maps__remove(&machine->kmaps, map);
 
 	machine__set_kernel_mmap(machine, start, end);
 
-	map_groups__insert(&machine->kmaps, map);
+	maps__insert(&machine->kmaps, map);
 	map__put(map);
 }
 
@@ -1940,7 +1934,7 @@ static void ip__resolve_ams(struct thread *thread,
 
 	ams->addr = ip;
 	ams->al_addr = al.addr;
-	ams->ms.mg  = al.mg;
+	ams->ms.maps = al.maps;
 	ams->ms.sym = al.sym;
 	ams->ms.map = al.map;
 	ams->phys_addr = 0;
@@ -1958,7 +1952,7 @@ static void ip__resolve_data(struct thread *thread,
 
 	ams->addr = addr;
 	ams->al_addr = al.addr;
-	ams->ms.mg  = al.mg;
+	ams->ms.maps = al.maps;
 	ams->ms.sym = al.sym;
 	ams->ms.map = al.map;
 	ams->phys_addr = phys_addr;
@@ -2075,7 +2069,7 @@ static int add_callchain_ip(struct thread *thread,
 		iter_cycles = iter->cycles;
 	}
 
-	ms.mg  = al.mg;
+	ms.maps = al.maps;
 	ms.map = al.map;
 	ms.sym = al.sym;
 	srcline = callchain_srcline(&ms, al.addr);
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index 499be204830d..be0a930eca89 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -4,7 +4,7 @@
 
 #include <sys/types.h>
 #include <linux/rbtree.h>
-#include "map_groups.h"
+#include "maps.h"
 #include "dsos.h"
 #include "rwsem.h"
 
@@ -51,7 +51,7 @@ struct machine {
 	struct vdso_info  *vdso_info;
 	struct perf_env   *env;
 	struct dsos	  dsos;
-	struct map_groups kmaps;
+	struct maps	  kmaps;
 	struct map	  *vmlinux_map;
 	u64		  kernel_start;
 	pid_t		  *current_tid;
@@ -83,7 +83,7 @@ struct map *machine__kernel_map(struct machine *machine)
 static inline
 struct maps *machine__kernel_maps(struct machine *machine)
 {
-	return &machine->kmaps.maps;
+	return &machine->kmaps;
 }
 
 int machine__get_kernel_start(struct machine *machine);
@@ -212,7 +212,7 @@ static inline
 struct symbol *machine__find_kernel_symbol(struct machine *machine, u64 addr,
 					   struct map **mapp)
 {
-	return map_groups__find_symbol(&machine->kmaps, addr, mapp);
+	return maps__find_symbol(&machine->kmaps, addr, mapp);
 }
 
 static inline
@@ -220,7 +220,7 @@ struct symbol *machine__find_kernel_symbol_by_name(struct machine *machine,
 						   const char *name,
 						   struct map **mapp)
 {
-	return map_groups__find_symbol_by_name(&machine->kmaps, name, mapp);
+	return maps__find_symbol_by_name(&machine->kmaps, name, mapp);
 }
 
 int arch__fix_module_text_start(u64 *start, u64 *size, const char *name);
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 744bfbaf35cf..fdd5bddb3075 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -433,51 +433,6 @@ int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
 	return ret;
 }
 
-int map__fprintf_srccode(struct map *map, u64 addr,
-			 FILE *fp,
-			 struct srccode_state *state)
-{
-	char *srcfile;
-	int ret = 0;
-	unsigned line;
-	int len;
-	char *srccode;
-
-	if (!map || !map->dso)
-		return 0;
-	srcfile = get_srcline_split(map->dso,
-				    map__rip_2objdump(map, addr),
-				    &line);
-	if (!srcfile)
-		return 0;
-
-	/* Avoid redundant printing */
-	if (state &&
-	    state->srcfile &&
-	    !strcmp(state->srcfile, srcfile) &&
-	    state->line == line) {
-		free(srcfile);
-		return 0;
-	}
-
-	srccode = find_sourceline(srcfile, line, &len);
-	if (!srccode)
-		goto out_free_line;
-
-	ret = fprintf(fp, "|%-8d %.*s", line, len, srccode);
-
-	if (state) {
-		state->srcfile = srcfile;
-		state->line = line;
-	}
-	return ret;
-
-out_free_line:
-	free(srcfile);
-	return ret;
-}
-
-
 void srccode_state_free(struct srccode_state *state)
 {
 	zfree(&state->srcfile);
@@ -557,73 +512,71 @@ u64 map__objdump_2mem(struct map *map, u64 ip)
 	return ip + map->reloc;
 }
 
-static void maps__init(struct maps *maps)
+void maps__init(struct maps *maps, struct machine *machine)
 {
 	maps->entries = RB_ROOT;
 	init_rwsem(&maps->lock);
+	maps->machine = machine;
+	maps->last_search_by_name = NULL;
+	maps->nr_maps = 0;
+	maps->maps_by_name = NULL;
+	refcount_set(&maps->refcnt, 1);
 }
 
-void map_groups__init(struct map_groups *mg, struct machine *machine)
-{
-	maps__init(&mg->maps);
-	mg->machine = machine;
-	mg->last_search_by_name = NULL;
-	mg->nr_maps = 0;
-	mg->maps_by_name = NULL;
-	refcount_set(&mg->refcnt, 1);
-}
-
-static void __map_groups__free_maps_by_name(struct map_groups *mg)
+static void __maps__free_maps_by_name(struct maps *maps)
 {
 	/*
 	 * Free everything to try to do it from the rbtree in the next search
 	 */
-	zfree(&mg->maps_by_name);
-	mg->nr_maps_allocated = 0;
+	zfree(&maps->maps_by_name);
+	maps->nr_maps_allocated = 0;
 }
 
-void map_groups__insert(struct map_groups *mg, struct map *map)
+void maps__insert(struct maps *maps, struct map *map)
 {
-	struct maps *maps = &mg->maps;
-
 	down_write(&maps->lock);
 	__maps__insert(maps, map);
-	++mg->nr_maps;
+	++maps->nr_maps;
 
 	/*
 	 * If we already performed some search by name, then we need to add the just
 	 * inserted map and resort.
 	 */
-	if (mg->maps_by_name) {
-		if (mg->nr_maps > mg->nr_maps_allocated) {
-			int nr_allocate = mg->nr_maps * 2;
-			struct map **maps_by_name = realloc(mg->maps_by_name, nr_allocate * sizeof(map));
+	if (maps->maps_by_name) {
+		if (maps->nr_maps > maps->nr_maps_allocated) {
+			int nr_allocate = maps->nr_maps * 2;
+			struct map **maps_by_name = realloc(maps->maps_by_name, nr_allocate * sizeof(map));
 
 			if (maps_by_name == NULL) {
-				__map_groups__free_maps_by_name(mg);
+				__maps__free_maps_by_name(maps);
 				return;
 			}
 
-			mg->maps_by_name = maps_by_name;
-			mg->nr_maps_allocated = nr_allocate;
+			maps->maps_by_name = maps_by_name;
+			maps->nr_maps_allocated = nr_allocate;
 		}
-		mg->maps_by_name[mg->nr_maps - 1] = map;
-		__map_groups__sort_by_name(mg);
+		maps->maps_by_name[maps->nr_maps - 1] = map;
+		__maps__sort_by_name(maps);
 	}
 	up_write(&maps->lock);
 }
 
-void map_groups__remove(struct map_groups *mg, struct map *map)
+static void __maps__remove(struct maps *maps, struct map *map)
+{
+	rb_erase_init(&map->rb_node, &maps->entries);
+	map__put(map);
+}
+
+void maps__remove(struct maps *maps, struct map *map)
 {
-	struct maps *maps = &mg->maps;
 	down_write(&maps->lock);
-	if (mg->last_search_by_name == map)
-		mg->last_search_by_name = NULL;
+	if (maps->last_search_by_name == map)
+		maps->last_search_by_name = NULL;
 
 	__maps__remove(maps, map);
-	--mg->nr_maps;
-	if (mg->maps_by_name)
-		__map_groups__free_maps_by_name(mg);
+	--maps->nr_maps;
+	if (maps->maps_by_name)
+		__maps__free_maps_by_name(maps);
 	up_write(&maps->lock);
 }
 
@@ -637,50 +590,44 @@ static void __maps__purge(struct maps *maps)
 	}
 }
 
-static void maps__exit(struct maps *maps)
+void maps__exit(struct maps *maps)
 {
 	down_write(&maps->lock);
 	__maps__purge(maps);
 	up_write(&maps->lock);
 }
 
-void map_groups__exit(struct map_groups *mg)
-{
-	maps__exit(&mg->maps);
-}
-
-bool map_groups__empty(struct map_groups *mg)
+bool maps__empty(struct maps *maps)
 {
-	return !maps__first(&mg->maps);
+	return !maps__first(maps);
 }
 
-struct map_groups *map_groups__new(struct machine *machine)
+struct maps *maps__new(struct machine *machine)
 {
-	struct map_groups *mg = zalloc(sizeof(*mg));
+	struct maps *maps = zalloc(sizeof(*maps));
 
-	if (mg != NULL)
-		map_groups__init(mg, machine);
+	if (maps != NULL)
+		maps__init(maps, machine);
 
-	return mg;
+	return maps;
 }
 
-void map_groups__delete(struct map_groups *mg)
+void maps__delete(struct maps *maps)
 {
-	map_groups__exit(mg);
-	unwind__finish_access(mg);
-	free(mg);
+	maps__exit(maps);
+	unwind__finish_access(maps);
+	free(maps);
 }
 
-void map_groups__put(struct map_groups *mg)
+void maps__put(struct maps *maps)
 {
-	if (mg && refcount_dec_and_test(&mg->refcnt))
-		map_groups__delete(mg);
+	if (maps && refcount_dec_and_test(&maps->refcnt))
+		maps__delete(maps);
 }
 
-struct symbol *map_groups__find_symbol(struct map_groups *mg,
-				       u64 addr, struct map **mapp)
+struct symbol *maps__find_symbol(struct maps *maps, u64 addr, struct map **mapp)
 {
-	struct map *map = map_groups__find(mg, addr);
+	struct map *map = maps__find(maps, addr);
 
 	/* Ensure map is loaded before using map->map_ip */
 	if (map != NULL && map__load(map) >= 0) {
@@ -699,8 +646,7 @@ static bool map__contains_symbol(struct map *map, struct symbol *sym)
 	return ip >= map->start && ip < map->end;
 }
 
-struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
-					 struct map **mapp)
+struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name, struct map **mapp)
 {
 	struct symbol *sym;
 	struct map *pos;
@@ -727,19 +673,12 @@ out:
 	return sym;
 }
 
-struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
-					       const char *name,
-					       struct map **mapp)
-{
-	return maps__find_symbol_by_name(&mg->maps, name, mapp);
-}
-
-int map_groups__find_ams(struct map_groups *mg, struct addr_map_symbol *ams)
+int maps__find_ams(struct maps *maps, struct addr_map_symbol *ams)
 {
 	if (ams->addr < ams->ms.map->start || ams->addr >= ams->ms.map->end) {
-		if (mg == NULL)
+		if (maps == NULL)
 			return -1;
-		ams->ms.map = map_groups__find(mg, ams->addr);
+		ams->ms.map = maps__find(maps, ams->addr);
 		if (ams->ms.map == NULL)
 			return -1;
 	}
@@ -750,7 +689,7 @@ int map_groups__find_ams(struct map_groups *mg, struct addr_map_symbol *ams)
 	return ams->ms.sym ? 0 : -1;
 }
 
-static size_t maps__fprintf(struct maps *maps, FILE *fp)
+size_t maps__fprintf(struct maps *maps, FILE *fp)
 {
 	size_t printed = 0;
 	struct map *pos;
@@ -771,19 +710,8 @@ static size_t maps__fprintf(struct maps *maps, FILE *fp)
 	return printed;
 }
 
-size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
-{
-	return maps__fprintf(&mg->maps, fp);
-}
-
-static void __map_groups__insert(struct map_groups *mg, struct map *map)
-{
-	__maps__insert(&mg->maps, map);
-}
-
-int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, FILE *fp)
+int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
 {
-	struct maps *maps = &mg->maps;
 	struct rb_root *root;
 	struct rb_node *next, *first;
 	int err = 0;
@@ -848,7 +776,7 @@ int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, FILE
 			}
 
 			before->end = map->start;
-			__map_groups__insert(mg, before);
+			__maps__insert(maps, before);
 			if (verbose >= 2 && !use_browser)
 				map__fprintf(before, fp);
 			map__put(before);
@@ -865,7 +793,7 @@ int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, FILE
 			after->start = map->end;
 			after->pgoff += map->end - pos->start;
 			assert(pos->map_ip(pos, map->end) == after->map_ip(after, map->end));
-			__map_groups__insert(mg, after);
+			__maps__insert(maps, after);
 			if (verbose >= 2 && !use_browser)
 				map__fprintf(after, fp);
 			map__put(after);
@@ -886,31 +814,30 @@ out:
 /*
  * XXX This should not really _copy_ te maps, but refcount them.
  */
-int map_groups__clone(struct thread *thread, struct map_groups *parent)
+int maps__clone(struct thread *thread, struct maps *parent)
 {
-	struct map_groups *mg = thread->mg;
+	struct maps *maps = thread->maps;
 	int err = -ENOMEM;
 	struct map *map;
-	struct maps *maps = &parent->maps;
 
-	down_read(&maps->lock);
+	down_read(&parent->lock);
 
-	maps__for_each_entry(maps, map) {
+	maps__for_each_entry(parent, map) {
 		struct map *new = map__clone(map);
 		if (new == NULL)
 			goto out_unlock;
 
-		err = unwind__prepare_access(mg, new, NULL);
+		err = unwind__prepare_access(maps, new, NULL);
 		if (err)
 			goto out_unlock;
 
-		map_groups__insert(mg, new);
+		maps__insert(maps, new);
 		map__put(new);
 	}
 
 	err = 0;
 out_unlock:
-	up_read(&maps->lock);
+	up_read(&parent->lock);
 	return err;
 }
 
@@ -935,26 +862,6 @@ static void __maps__insert(struct maps *maps, struct map *map)
 	map__get(map);
 }
 
-void maps__insert(struct maps *maps, struct map *map)
-{
-	down_write(&maps->lock);
-	__maps__insert(maps, map);
-	up_write(&maps->lock);
-}
-
-void __maps__remove(struct maps *maps, struct map *map)
-{
-	rb_erase_init(&map->rb_node, &maps->entries);
-	map__put(map);
-}
-
-void maps__remove(struct maps *maps, struct map *map)
-{
-	down_write(&maps->lock);
-	__maps__remove(maps, map);
-	up_write(&maps->lock);
-}
-
 struct map *maps__find(struct maps *maps, u64 ip)
 {
 	struct rb_node *p;
@@ -1018,7 +925,7 @@ struct kmap *map__kmap(struct map *map)
 	return kmap;
 }
 
-struct map_groups *map__kmaps(struct map *map)
+struct maps *map__kmaps(struct map *map)
 {
 	struct kmap *kmap = map__kmap(map);
 
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 5e8899883231..067036e8970c 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -12,11 +12,8 @@
 #include <linux/types.h>
 
 struct dso;
-struct ip_callchain;
-struct ref_reloc_sym;
-struct map_groups;
+struct maps;
 struct machine;
-struct evsel;
 
 struct map {
 	union {
@@ -45,7 +42,7 @@ struct kmap;
 
 struct kmap *__map__kmap(struct map *map);
 struct kmap *map__kmap(struct map *map);
-struct map_groups *map__kmaps(struct map *map);
+struct maps *map__kmaps(struct map *map);
 
 static inline u64 map__map_ip(struct map *map, u64 ip)
 {
@@ -138,19 +135,12 @@ char *map__srcline(struct map *map, u64 addr, struct symbol *sym);
 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
 			 FILE *fp);
 
-struct srccode_state;
-
-int map__fprintf_srccode(struct map *map, u64 addr,
-			 FILE *fp, struct srccode_state *state);
-
 int map__load(struct map *map);
 struct symbol *map__find_symbol(struct map *map, u64 addr);
 struct symbol *map__find_symbol_by_name(struct map *map, const char *name);
 void map__fixup_start(struct map *map);
 void map__fixup_end(struct map *map);
 
-void map__reloc_vmlinux(struct map *map);
-
 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name,
 				    u64 addr);
 
diff --git a/tools/perf/util/map_groups.h b/tools/perf/util/map_groups.h
deleted file mode 100644
index 63ed211fe241..000000000000
--- a/tools/perf/util/map_groups.h
+++ /dev/null
@@ -1,106 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __PERF_MAP_GROUPS_H
-#define __PERF_MAP_GROUPS_H
-
-#include <linux/refcount.h>
-#include <linux/rbtree.h>
-#include <stdio.h>
-#include <stdbool.h>
-#include <linux/types.h>
-#include "rwsem.h"
-
-struct ref_reloc_sym;
-struct machine;
-struct map;
-struct thread;
-
-struct maps {
-	struct rb_root      entries;
-	struct rw_semaphore lock;
-};
-
-void maps__insert(struct maps *maps, struct map *map);
-void maps__remove(struct maps *maps, struct map *map);
-void __maps__remove(struct maps *maps, struct map *map);
-struct map *maps__find(struct maps *maps, u64 addr);
-struct map *maps__first(struct maps *maps);
-struct map *map__next(struct map *map);
-
-#define maps__for_each_entry(maps, map) \
-	for (map = maps__first(maps); map; map = map__next(map))
-
-#define maps__for_each_entry_safe(maps, map, next) \
-	for (map = maps__first(maps), next = map__next(map); map; map = next, next = map__next(map))
-
-struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name, struct map **mapp);
-
-struct map_groups {
-	struct maps	 maps;
-	struct machine	 *machine;
-	struct map	 *last_search_by_name;
-	struct map	 **maps_by_name;
-	refcount_t	 refcnt;
-	unsigned int	 nr_maps;
-	unsigned int	 nr_maps_allocated;
-#ifdef HAVE_LIBUNWIND_SUPPORT
-	void				*addr_space;
-	struct unwind_libunwind_ops	*unwind_libunwind_ops;
-#endif
-};
-
-#define KMAP_NAME_LEN 256
-
-struct kmap {
-	struct ref_reloc_sym *ref_reloc_sym;
-	struct map_groups    *kmaps;
-	char		     name[KMAP_NAME_LEN];
-};
-
-struct map_groups *map_groups__new(struct machine *machine);
-void map_groups__delete(struct map_groups *mg);
-bool map_groups__empty(struct map_groups *mg);
-
-static inline struct map_groups *map_groups__get(struct map_groups *mg)
-{
-	if (mg)
-		refcount_inc(&mg->refcnt);
-	return mg;
-}
-
-void map_groups__put(struct map_groups *mg);
-void map_groups__init(struct map_groups *mg, struct machine *machine);
-void map_groups__exit(struct map_groups *mg);
-int map_groups__clone(struct thread *thread, struct map_groups *parent);
-size_t map_groups__fprintf(struct map_groups *mg, FILE *fp);
-
-void map_groups__insert(struct map_groups *mg, struct map *map);
-
-void map_groups__remove(struct map_groups *mg, struct map *map);
-
-static inline struct map *map_groups__find(struct map_groups *mg, u64 addr)
-{
-	return maps__find(&mg->maps, addr);
-}
-
-#define map_groups__for_each_entry(mg, map) \
-	for (map = maps__first(&mg->maps); map; map = map__next(map))
-
-#define map_groups__for_each_entry_safe(mg, map, next) \
-	for (map = maps__first(&mg->maps), next = map__next(map); map; map = next, next = map__next(map))
-
-struct symbol *map_groups__find_symbol(struct map_groups *mg, u64 addr, struct map **mapp);
-struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg, const char *name, struct map **mapp);
-
-struct addr_map_symbol;
-
-int map_groups__find_ams(struct map_groups *mg, struct addr_map_symbol *ams);
-
-int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map, FILE *fp);
-
-struct map *map_groups__find_by_name(struct map_groups *mg, const char *name);
-
-int map_groups__merge_in(struct map_groups *kmaps, struct map *new_map);
-
-void __map_groups__sort_by_name(struct map_groups *mg);
-
-#endif // __PERF_MAP_GROUPS_H
diff --git a/tools/perf/util/map_symbol.h b/tools/perf/util/map_symbol.h
index 2964d971aeab..5b8ca93798e9 100644
--- a/tools/perf/util/map_symbol.h
+++ b/tools/perf/util/map_symbol.h
@@ -4,12 +4,12 @@
 
 #include <linux/types.h>
 
-struct map_groups;
+struct maps;
 struct map;
 struct symbol;
 
 struct map_symbol {
-	struct map_groups *mg;
+	struct maps   *maps;
 	struct map    *map;
 	struct symbol *sym;
 };
diff --git a/tools/perf/util/maps.h b/tools/perf/util/maps.h
new file mode 100644
index 000000000000..3dd000ddf925
--- /dev/null
+++ b/tools/perf/util/maps.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_MAPS_H
+#define __PERF_MAPS_H
+
+#include <linux/refcount.h>
+#include <linux/rbtree.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <linux/types.h>
+#include "rwsem.h"
+
+struct ref_reloc_sym;
+struct machine;
+struct map;
+struct maps;
+struct thread;
+
+struct map *maps__find(struct maps *maps, u64 addr);
+struct map *maps__first(struct maps *maps);
+struct map *map__next(struct map *map);
+
+#define maps__for_each_entry(maps, map) \
+	for (map = maps__first(maps); map; map = map__next(map))
+
+#define maps__for_each_entry_safe(maps, map, next) \
+	for (map = maps__first(maps), next = map__next(map); map; map = next, next = map__next(map))
+
+struct maps {
+	struct rb_root      entries;
+	struct rw_semaphore lock;
+	struct machine	 *machine;
+	struct map	 *last_search_by_name;
+	struct map	 **maps_by_name;
+	refcount_t	 refcnt;
+	unsigned int	 nr_maps;
+	unsigned int	 nr_maps_allocated;
+#ifdef HAVE_LIBUNWIND_SUPPORT
+	void				*addr_space;
+	struct unwind_libunwind_ops	*unwind_libunwind_ops;
+#endif
+};
+
+#define KMAP_NAME_LEN 256
+
+struct kmap {
+	struct ref_reloc_sym *ref_reloc_sym;
+	struct maps	     *kmaps;
+	char		     name[KMAP_NAME_LEN];
+};
+
+struct maps *maps__new(struct machine *machine);
+void maps__delete(struct maps *maps);
+bool maps__empty(struct maps *maps);
+
+static inline struct maps *maps__get(struct maps *maps)
+{
+	if (maps)
+		refcount_inc(&maps->refcnt);
+	return maps;
+}
+
+void maps__put(struct maps *maps);
+void maps__init(struct maps *maps, struct machine *machine);
+void maps__exit(struct maps *maps);
+int maps__clone(struct thread *thread, struct maps *parent);
+size_t maps__fprintf(struct maps *maps, FILE *fp);
+
+void maps__insert(struct maps *maps, struct map *map);
+
+void maps__remove(struct maps *maps, struct map *map);
+
+struct symbol *maps__find_symbol(struct maps *maps, u64 addr, struct map **mapp);
+struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name, struct map **mapp);
+
+struct addr_map_symbol;
+
+int maps__find_ams(struct maps *maps, struct addr_map_symbol *ams);
+
+int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp);
+
+struct map *maps__find_by_name(struct maps *maps, const char *name);
+
+int maps__merge_in(struct maps *kmaps, struct map *new_map);
+
+void __maps__sort_by_name(struct maps *maps);
+
+#endif // __PERF_MAPS_H
diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h
index e014c2c038f4..a45499126184 100644
--- a/tools/perf/util/perf_regs.h
+++ b/tools/perf/util/perf_regs.h
@@ -41,7 +41,7 @@ int perf_reg_value(u64 *valp, struct regs_dump *regs, int id);
 
 static inline const char *perf_reg_name(int id __maybe_unused)
 {
-	return NULL;
+	return "unknown";
 }
 
 static inline int perf_reg_value(u64 *valp __maybe_unused,
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index e8d348988026..8b99fd312aae 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -24,6 +24,7 @@
 #include "pmu-events/pmu-events.h"
 #include "string2.h"
 #include "strbuf.h"
+#include "fncache.h"
 
 struct perf_pmu_format {
 	char *name;
@@ -82,7 +83,6 @@ int perf_pmu__format_parse(char *dir, struct list_head *head)
  */
 static int pmu_format(const char *name, struct list_head *format)
 {
-	struct stat st;
 	char path[PATH_MAX];
 	const char *sysfs = sysfs__mountpoint();
 
@@ -92,8 +92,8 @@ static int pmu_format(const char *name, struct list_head *format)
 	snprintf(path, PATH_MAX,
 		 "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
 
-	if (stat(path, &st) < 0)
-		return 0;	/* no error if format does not exist */
+	if (!file_available(path))
+		return 0;
 
 	if (perf_pmu__format_parse(path, format))
 		return -1;
@@ -475,7 +475,6 @@ static int pmu_aliases_parse(char *dir, struct list_head *head)
  */
 static int pmu_aliases(const char *name, struct list_head *head)
 {
-	struct stat st;
 	char path[PATH_MAX];
 	const char *sysfs = sysfs__mountpoint();
 
@@ -485,8 +484,8 @@ static int pmu_aliases(const char *name, struct list_head *head)
 	snprintf(path, PATH_MAX,
 		 "%s/bus/event_source/devices/%s/events", sysfs, name);
 
-	if (stat(path, &st) < 0)
-		return 0;	 /* no error if 'events' does not exist */
+	if (!file_available(path))
+		return 0;
 
 	if (pmu_aliases_parse(path, head))
 		return -1;
@@ -525,7 +524,6 @@ static int pmu_alias_terms(struct perf_pmu_alias *alias,
  */
 static int pmu_type(const char *name, __u32 *type)
 {
-	struct stat st;
 	char path[PATH_MAX];
 	FILE *file;
 	int ret = 0;
@@ -537,7 +535,7 @@ static int pmu_type(const char *name, __u32 *type)
 	snprintf(path, PATH_MAX,
 		 "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
 
-	if (stat(path, &st) < 0)
+	if (access(path, R_OK) < 0)
 		return -1;
 
 	file = fopen(path, "r");
@@ -628,14 +626,11 @@ static struct perf_cpu_map *pmu_cpumask(const char *name)
 static bool pmu_is_uncore(const char *name)
 {
 	char path[PATH_MAX];
-	struct perf_cpu_map *cpus;
-	const char *sysfs = sysfs__mountpoint();
+	const char *sysfs;
 
+	sysfs = sysfs__mountpoint();
 	snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name);
-	cpus = __pmu_cpumask(path);
-	perf_cpu_map__put(cpus);
-
-	return !!cpus;
+	return file_available(path);
 }
 
 /*
@@ -645,7 +640,6 @@ static bool pmu_is_uncore(const char *name)
  */
 static int is_arm_pmu_core(const char *name)
 {
-	struct stat st;
 	char path[PATH_MAX];
 	const char *sysfs = sysfs__mountpoint();
 
@@ -655,10 +649,7 @@ static int is_arm_pmu_core(const char *name)
 	/* Look for cpu sysfs (specific to arm) */
 	scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus",
 				sysfs, name);
-	if (stat(path, &st) == 0)
-		return 1;
-
-	return 0;
+	return file_available(path);
 }
 
 static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
@@ -1544,7 +1535,6 @@ bool pmu_have_event(const char *pname, const char *name)
 
 static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
 {
-	struct stat st;
 	char path[PATH_MAX];
 	const char *sysfs;
 
@@ -1554,10 +1544,8 @@ static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
 
 	snprintf(path, PATH_MAX,
 		 "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
-
-	if (stat(path, &st) < 0)
+	if (!file_available(path))
 		return NULL;
-
 	return fopen(path, "r");
 }
 
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 52b2d165453a..eea132f512b0 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -28,7 +28,7 @@
 #include "dso.h"
 #include "color.h"
 #include "map.h"
-#include "map_groups.h"
+#include "maps.h"
 #include "symbol.h"
 #include <api/fs/fs.h>
 #include "trace-event.h"	/* For __maybe_unused */
@@ -321,7 +321,7 @@ static int kernel_get_module_dso(const char *module, struct dso **pdso)
 		char module_name[128];
 
 		snprintf(module_name, sizeof(module_name), "[%s]", module);
-		map = map_groups__find_by_name(&host_machine->kmaps, module_name);
+		map = maps__find_by_name(&host_machine->kmaps, module_name);
 		if (map) {
 			dso = map->dso;
 			goto found;
diff --git a/tools/perf/util/python-ext-sources b/tools/perf/util/python-ext-sources
index 9af183860fbd..e7279ea6043a 100644
--- a/tools/perf/util/python-ext-sources
+++ b/tools/perf/util/python-ext-sources
@@ -33,3 +33,4 @@ util/trace-event.c
 util/string.c
 util/symbol_fprintf.c
 util/units.c
+util/affinity.c
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 9581a904af29..80ca5d0ab7fe 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -1127,7 +1127,7 @@ static void python_export_sample_table(struct db_export *dbe,
 
 	tuple_set_u64(t, 0, es->db_id);
 	tuple_set_u64(t, 1, es->evsel->db_id);
-	tuple_set_u64(t, 2, es->al->mg->machine->db_id);
+	tuple_set_u64(t, 2, es->al->maps->machine->db_id);
 	tuple_set_u64(t, 3, es->al->thread->db_id);
 	tuple_set_u64(t, 4, es->comm_db_id);
 	tuple_set_u64(t, 5, es->dso_db_id);
diff --git a/tools/perf/util/srccode.c b/tools/perf/util/srccode.c
index d84ed8b6caaa..c29edaaca863 100644
--- a/tools/perf/util/srccode.c
+++ b/tools/perf/util/srccode.c
@@ -16,6 +16,7 @@
 #include "srccode.h"
 #include "debug.h"
 #include <internal/lib.h> // page_size
+#include "fncache.h"
 
 #define MAXSRCCACHE (32*1024*1024)
 #define MAXSRCFILES     64
@@ -36,14 +37,6 @@ static LIST_HEAD(srcfile_list);
 static long map_total_sz;
 static int num_srcfiles;
 
-static unsigned shash(unsigned char *s)
-{
-	unsigned h = 0;
-	while (*s)
-		h = 65599 * h + *s++;
-	return h ^ (h >> 16);
-}
-
 static int countlines(char *map, int maplen)
 {
 	int numl;
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 16776d5fbaea..6658fbf196e6 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -9,7 +9,7 @@
 
 #include "dso.h"
 #include "map.h"
-#include "map_groups.h"
+#include "maps.h"
 #include "symbol.h"
 #include "symsrc.h"
 #include "demangle-java.h"
@@ -844,7 +844,7 @@ void __weak arch__sym_update(struct symbol *s __maybe_unused,
 
 static int dso__process_kernel_symbol(struct dso *dso, struct map *map,
 				      GElf_Sym *sym, GElf_Shdr *shdr,
-				      struct map_groups *kmaps, struct kmap *kmap,
+				      struct maps *kmaps, struct kmap *kmap,
 				      struct dso **curr_dsop, struct map **curr_mapp,
 				      const char *section_name,
 				      bool adjust_kernel_syms, bool kmodule, bool *remap_kernel)
@@ -876,8 +876,8 @@ static int dso__process_kernel_symbol(struct dso *dso, struct map *map,
 			/* Ensure maps are correctly ordered */
 			if (kmaps) {
 				map__get(map);
-				map_groups__remove(kmaps, map);
-				map_groups__insert(kmaps, map);
+				maps__remove(kmaps, map);
+				maps__insert(kmaps, map);
 				map__put(map);
 			}
 		}
@@ -902,7 +902,7 @@ static int dso__process_kernel_symbol(struct dso *dso, struct map *map,
 
 	snprintf(dso_name, sizeof(dso_name), "%s%s", dso->short_name, section_name);
 
-	curr_map = map_groups__find_by_name(kmaps, dso_name);
+	curr_map = maps__find_by_name(kmaps, dso_name);
 	if (curr_map == NULL) {
 		u64 start = sym->st_value;
 
@@ -928,7 +928,7 @@ static int dso__process_kernel_symbol(struct dso *dso, struct map *map,
 			curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
 		}
 		curr_dso->symtab_type = dso->symtab_type;
-		map_groups__insert(kmaps, curr_map);
+		maps__insert(kmaps, curr_map);
 		/*
 		 * Add it before we drop the referece to curr_map, i.e. while
 		 * we still are sure to have a reference to this DSO via
@@ -950,7 +950,7 @@ int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
 		  struct symsrc *runtime_ss, int kmodule)
 {
 	struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL;
-	struct map_groups *kmaps = kmap ? map__kmaps(map) : NULL;
+	struct maps *kmaps = kmap ? map__kmaps(map) : NULL;
 	struct map *curr_map = map;
 	struct dso *curr_dso = dso;
 	Elf_Data *symstrs, *secstrs;
@@ -1162,7 +1162,7 @@ int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
 			 * We need to fixup this here too because we create new
 			 * maps here, for things like vsyscall sections.
 			 */
-			map_groups__fixup_end(kmaps);
+			maps__fixup_end(kmaps);
 		}
 	}
 	err = nr;
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index db9667aacb88..3b379b1296f1 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -239,9 +239,8 @@ void symbols__fixup_end(struct rb_root_cached *symbols)
 		curr->end = roundup(curr->start, 4096) + 4096;
 }
 
-void map_groups__fixup_end(struct map_groups *mg)
+void maps__fixup_end(struct maps *maps)
 {
-	struct maps *maps = &mg->maps;
 	struct map *prev = NULL, *curr;
 
 	down_write(&maps->lock);
@@ -698,7 +697,7 @@ static int dso__load_all_kallsyms(struct dso *dso, const char *filename)
 	return kallsyms__parse(filename, dso, map__process_kallsym_symbol);
 }
 
-static int map_groups__split_kallsyms_for_kcore(struct map_groups *kmaps, struct dso *dso)
+static int maps__split_kallsyms_for_kcore(struct maps *kmaps, struct dso *dso)
 {
 	struct map *curr_map;
 	struct symbol *pos;
@@ -724,7 +723,7 @@ static int map_groups__split_kallsyms_for_kcore(struct map_groups *kmaps, struct
 		if (module)
 			*module = '\0';
 
-		curr_map = map_groups__find(kmaps, pos->start);
+		curr_map = maps__find(kmaps, pos->start);
 
 		if (!curr_map) {
 			symbol__delete(pos);
@@ -751,8 +750,8 @@ static int map_groups__split_kallsyms_for_kcore(struct map_groups *kmaps, struct
  * kernel range is broken in several maps, named [kernel].N, as we don't have
  * the original ELF section names vmlinux have.
  */
-static int map_groups__split_kallsyms(struct map_groups *kmaps, struct dso *dso, u64 delta,
-				      struct map *initial_map)
+static int maps__split_kallsyms(struct maps *kmaps, struct dso *dso, u64 delta,
+				struct map *initial_map)
 {
 	struct machine *machine;
 	struct map *curr_map = initial_map;
@@ -797,7 +796,7 @@ static int map_groups__split_kallsyms(struct map_groups *kmaps, struct dso *dso,
 					dso__set_loaded(curr_map->dso);
 				}
 
-				curr_map = map_groups__find_by_name(kmaps, module);
+				curr_map = maps__find_by_name(kmaps, module);
 				if (curr_map == NULL) {
 					pr_debug("%s/proc/{kallsyms,modules} "
 					         "inconsistency while looking "
@@ -864,7 +863,7 @@ static int map_groups__split_kallsyms(struct map_groups *kmaps, struct dso *dso,
 			}
 
 			curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
-			map_groups__insert(kmaps, curr_map);
+			maps__insert(kmaps, curr_map);
 			++kernel_range;
 		} else if (delta) {
 			/* Kernel was relocated at boot time */
@@ -1049,8 +1048,7 @@ out_delete_from:
 	return ret;
 }
 
-static int do_validate_kcore_modules(const char *filename,
-				  struct map_groups *kmaps)
+static int do_validate_kcore_modules(const char *filename, struct maps *kmaps)
 {
 	struct rb_root modules = RB_ROOT;
 	struct map *old_map;
@@ -1060,7 +1058,7 @@ static int do_validate_kcore_modules(const char *filename,
 	if (err)
 		return err;
 
-	map_groups__for_each_entry(kmaps, old_map) {
+	maps__for_each_entry(kmaps, old_map) {
 		struct module_info *mi;
 
 		if (!__map__is_kmodule(old_map)) {
@@ -1107,7 +1105,7 @@ static bool filename_from_kallsyms_filename(char *filename,
 static int validate_kcore_modules(const char *kallsyms_filename,
 				  struct map *map)
 {
-	struct map_groups *kmaps = map__kmaps(map);
+	struct maps *kmaps = map__kmaps(map);
 	char modules_filename[PATH_MAX];
 
 	if (!kmaps)
@@ -1167,15 +1165,15 @@ static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data)
 }
 
 /*
- * Merges map into map_groups by splitting the new map
- * within the existing map regions.
+ * Merges map into maps by splitting the new map within the existing map
+ * regions.
  */
-int map_groups__merge_in(struct map_groups *kmaps, struct map *new_map)
+int maps__merge_in(struct maps *kmaps, struct map *new_map)
 {
 	struct map *old_map;
 	LIST_HEAD(merged);
 
-	map_groups__for_each_entry(kmaps, old_map) {
+	maps__for_each_entry(kmaps, old_map) {
 		/* no overload with this one */
 		if (new_map->end < old_map->start ||
 		    new_map->start >= old_map->end)
@@ -1232,12 +1230,12 @@ int map_groups__merge_in(struct map_groups *kmaps, struct map *new_map)
 	while (!list_empty(&merged)) {
 		old_map = list_entry(merged.next, struct map, node);
 		list_del_init(&old_map->node);
-		map_groups__insert(kmaps, old_map);
+		maps__insert(kmaps, old_map);
 		map__put(old_map);
 	}
 
 	if (new_map) {
-		map_groups__insert(kmaps, new_map);
+		maps__insert(kmaps, new_map);
 		map__put(new_map);
 	}
 	return 0;
@@ -1246,7 +1244,7 @@ int map_groups__merge_in(struct map_groups *kmaps, struct map *new_map)
 static int dso__load_kcore(struct dso *dso, struct map *map,
 			   const char *kallsyms_filename)
 {
-	struct map_groups *kmaps = map__kmaps(map);
+	struct maps *kmaps = map__kmaps(map);
 	struct kcore_mapfn_data md;
 	struct map *old_map, *new_map, *replacement_map = NULL, *next;
 	struct machine *machine;
@@ -1295,14 +1293,14 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
 	}
 
 	/* Remove old maps */
-	map_groups__for_each_entry_safe(kmaps, old_map, next) {
+	maps__for_each_entry_safe(kmaps, old_map, next) {
 		/*
 		 * We need to preserve eBPF maps even if they are
 		 * covered by kcore, because we need to access
 		 * eBPF dso for source data.
 		 */
 		if (old_map != map && !__map__is_bpf_prog(old_map))
-			map_groups__remove(kmaps, old_map);
+			maps__remove(kmaps, old_map);
 	}
 	machine->trampolines_mapped = false;
 
@@ -1331,8 +1329,8 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
 			map->unmap_ip	= new_map->unmap_ip;
 			/* Ensure maps are correctly ordered */
 			map__get(map);
-			map_groups__remove(kmaps, map);
-			map_groups__insert(kmaps, map);
+			maps__remove(kmaps, map);
+			maps__insert(kmaps, map);
 			map__put(map);
 			map__put(new_map);
 		} else {
@@ -1341,7 +1339,7 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
 			 * and ensure that current maps (eBPF)
 			 * stay intact.
 			 */
-			if (map_groups__merge_in(kmaps, new_map))
+			if (maps__merge_in(kmaps, new_map))
 				goto out_err;
 		}
 	}
@@ -1433,9 +1431,9 @@ int __dso__load_kallsyms(struct dso *dso, const char *filename,
 		dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS;
 
 	if (!no_kcore && !dso__load_kcore(dso, map, filename))
-		return map_groups__split_kallsyms_for_kcore(kmap->kmaps, dso);
+		return maps__split_kallsyms_for_kcore(kmap->kmaps, dso);
 	else
-		return map_groups__split_kallsyms(kmap->kmaps, dso, delta, map);
+		return maps__split_kallsyms(kmap->kmaps, dso, delta, map);
 }
 
 int dso__load_kallsyms(struct dso *dso, const char *filename,
@@ -1772,68 +1770,67 @@ static int map__strcmp_name(const void *name, const void *b)
 	return strcmp(name, map->dso->short_name);
 }
 
-void __map_groups__sort_by_name(struct map_groups *mg)
+void __maps__sort_by_name(struct maps *maps)
 {
-	qsort(mg->maps_by_name, mg->nr_maps, sizeof(struct map *), map__strcmp);
+	qsort(maps->maps_by_name, maps->nr_maps, sizeof(struct map *), map__strcmp);
 }
 
-static int map__groups__sort_by_name_from_rbtree(struct map_groups *mg)
+static int map__groups__sort_by_name_from_rbtree(struct maps *maps)
 {
 	struct map *map;
-	struct map **maps_by_name = realloc(mg->maps_by_name, mg->nr_maps * sizeof(map));
+	struct map **maps_by_name = realloc(maps->maps_by_name, maps->nr_maps * sizeof(map));
 	int i = 0;
 
 	if (maps_by_name == NULL)
 		return -1;
 
-	mg->maps_by_name = maps_by_name;
-	mg->nr_maps_allocated = mg->nr_maps;
+	maps->maps_by_name = maps_by_name;
+	maps->nr_maps_allocated = maps->nr_maps;
 
-	maps__for_each_entry(&mg->maps, map)
+	maps__for_each_entry(maps, map)
 		maps_by_name[i++] = map;
 
-	__map_groups__sort_by_name(mg);
+	__maps__sort_by_name(maps);
 	return 0;
 }
 
-static struct map *__map_groups__find_by_name(struct map_groups *mg, const char *name)
+static struct map *__maps__find_by_name(struct maps *maps, const char *name)
 {
 	struct map **mapp;
 
-	if (mg->maps_by_name == NULL &&
-	    map__groups__sort_by_name_from_rbtree(mg))
+	if (maps->maps_by_name == NULL &&
+	    map__groups__sort_by_name_from_rbtree(maps))
 		return NULL;
 
-	mapp = bsearch(name, mg->maps_by_name, mg->nr_maps, sizeof(*mapp), map__strcmp_name);
+	mapp = bsearch(name, maps->maps_by_name, maps->nr_maps, sizeof(*mapp), map__strcmp_name);
 	if (mapp)
 		return *mapp;
 	return NULL;
 }
 
-struct map *map_groups__find_by_name(struct map_groups *mg, const char *name)
+struct map *maps__find_by_name(struct maps *maps, const char *name)
 {
-	struct maps *maps = &mg->maps;
 	struct map *map;
 
 	down_read(&maps->lock);
 
-	if (mg->last_search_by_name && strcmp(mg->last_search_by_name->dso->short_name, name) == 0) {
-		map = mg->last_search_by_name;
+	if (maps->last_search_by_name && strcmp(maps->last_search_by_name->dso->short_name, name) == 0) {
+		map = maps->last_search_by_name;
 		goto out_unlock;
 	}
 	/*
-	 * If we have mg->maps_by_name, then the name isn't in the rbtree,
-	 * as mg->maps_by_name mirrors the rbtree when lookups by name are
+	 * If we have maps->maps_by_name, then the name isn't in the rbtree,
+	 * as maps->maps_by_name mirrors the rbtree when lookups by name are
 	 * made.
 	 */
-	map = __map_groups__find_by_name(mg, name);
-	if (map || mg->maps_by_name != NULL)
+	map = __maps__find_by_name(maps, name);
+	if (map || maps->maps_by_name != NULL)
 		goto out_unlock;
 
 	/* Fallback to traversing the rbtree... */
 	maps__for_each_entry(maps, map)
 		if (strcmp(map->dso->short_name, name) == 0) {
-			mg->last_search_by_name = map;
+			maps->last_search_by_name = map;
 			goto out_unlock;
 		}
 
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 0b718cc9fb28..93fc43db1be3 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -21,7 +21,7 @@
 
 struct dso;
 struct map;
-struct map_groups;
+struct maps;
 struct option;
 
 /*
@@ -108,7 +108,7 @@ struct ref_reloc_sym {
 
 struct addr_location {
 	struct thread *thread;
-	struct map_groups *mg;
+	struct maps   *maps;
 	struct map    *map;
 	struct symbol *sym;
 	const char    *srcline;
@@ -186,7 +186,7 @@ void __symbols__insert(struct rb_root_cached *symbols, struct symbol *sym,
 void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym);
 void symbols__fixup_duplicate(struct rb_root_cached *symbols);
 void symbols__fixup_end(struct rb_root_cached *symbols);
-void map_groups__fixup_end(struct map_groups *mg);
+void maps__fixup_end(struct maps *maps);
 
 typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);
 int file__read_maps(int fd, bool exe, mapfn_t mapfn, void *data,
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index 48c3f8b9c852..c423298fe62d 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -493,7 +493,7 @@ static int __event__synthesize_thread(union perf_event *comm_event,
 
 		/*
 		 * send mmap only for thread group leader
-		 * see thread__init_map_groups
+		 * see thread__init_maps()
 		 */
 		if (pid == tgid &&
 		    perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
diff --git a/tools/perf/util/thread-stack.c b/tools/perf/util/thread-stack.c
index cd8a948d03ec..0885967d5bc3 100644
--- a/tools/perf/util/thread-stack.c
+++ b/tools/perf/util/thread-stack.c
@@ -134,8 +134,8 @@ static int thread_stack__init(struct thread_stack *ts, struct thread *thread,
 	if (err)
 		return err;
 
-	if (thread->mg && thread->mg->machine) {
-		struct machine *machine = thread->mg->machine;
+	if (thread->maps && thread->maps->machine) {
+		struct machine *machine = thread->maps->machine;
 		const char *arch = perf_env__arch(machine->env);
 
 		ts->kernel_start = machine__kernel_start(machine);
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 0a277a920970..28b719388028 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -19,21 +19,21 @@
 
 #include <api/fs/fs.h>
 
-int thread__init_map_groups(struct thread *thread, struct machine *machine)
+int thread__init_maps(struct thread *thread, struct machine *machine)
 {
 	pid_t pid = thread->pid_;
 
 	if (pid == thread->tid || pid == -1) {
-		thread->mg = map_groups__new(machine);
+		thread->maps = maps__new(machine);
 	} else {
 		struct thread *leader = __machine__findnew_thread(machine, pid, pid);
 		if (leader) {
-			thread->mg = map_groups__get(leader->mg);
+			thread->maps = maps__get(leader->maps);
 			thread__put(leader);
 		}
 	}
 
-	return thread->mg ? 0 : -1;
+	return thread->maps ? 0 : -1;
 }
 
 struct thread *thread__new(pid_t pid, pid_t tid)
@@ -86,9 +86,9 @@ void thread__delete(struct thread *thread)
 
 	thread_stack__free(thread);
 
-	if (thread->mg) {
-		map_groups__put(thread->mg);
-		thread->mg = NULL;
+	if (thread->maps) {
+		maps__put(thread->maps);
+		thread->maps = NULL;
 	}
 	down_write(&thread->namespaces_lock);
 	list_for_each_entry_safe(namespaces, tmp_namespaces,
@@ -251,7 +251,7 @@ static int ____thread__set_comm(struct thread *thread, const char *str,
 		list_add(&new->list, &thread->comm_list);
 
 		if (exec)
-			unwind__flush_access(thread->mg);
+			unwind__flush_access(thread->maps);
 	}
 
 	thread->comm_set = true;
@@ -324,19 +324,19 @@ int thread__comm_len(struct thread *thread)
 size_t thread__fprintf(struct thread *thread, FILE *fp)
 {
 	return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
-	       map_groups__fprintf(thread->mg, fp);
+	       maps__fprintf(thread->maps, fp);
 }
 
 int thread__insert_map(struct thread *thread, struct map *map)
 {
 	int ret;
 
-	ret = unwind__prepare_access(thread->mg, map, NULL);
+	ret = unwind__prepare_access(thread->maps, map, NULL);
 	if (ret)
 		return ret;
 
-	map_groups__fixup_overlappings(thread->mg, map, stderr);
-	map_groups__insert(thread->mg, map);
+	maps__fixup_overlappings(thread->maps, map, stderr);
+	maps__insert(thread->maps, map);
 
 	return 0;
 }
@@ -345,13 +345,13 @@ static int __thread__prepare_access(struct thread *thread)
 {
 	bool initialized = false;
 	int err = 0;
-	struct maps *maps = &thread->mg->maps;
+	struct maps *maps = thread->maps;
 	struct map *map;
 
 	down_read(&maps->lock);
 
 	maps__for_each_entry(maps, map) {
-		err = unwind__prepare_access(thread->mg, map, &initialized);
+		err = unwind__prepare_access(thread->maps, map, &initialized);
 		if (err || initialized)
 			break;
 	}
@@ -371,21 +371,19 @@ static int thread__prepare_access(struct thread *thread)
 	return err;
 }
 
-static int thread__clone_map_groups(struct thread *thread,
-				    struct thread *parent,
-				    bool do_maps_clone)
+static int thread__clone_maps(struct thread *thread, struct thread *parent, bool do_maps_clone)
 {
 	/* This is new thread, we share map groups for process. */
 	if (thread->pid_ == parent->pid_)
 		return thread__prepare_access(thread);
 
-	if (thread->mg == parent->mg) {
+	if (thread->maps == parent->maps) {
 		pr_debug("broken map groups on thread %d/%d parent %d/%d\n",
 			 thread->pid_, thread->tid, parent->pid_, parent->tid);
 		return 0;
 	}
 	/* But this one is new process, copy maps. */
-	return do_maps_clone ? map_groups__clone(thread, parent->mg) : 0;
+	return do_maps_clone ? maps__clone(thread, parent->maps) : 0;
 }
 
 int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp, bool do_maps_clone)
@@ -401,7 +399,7 @@ int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp, bo
 	}
 
 	thread->ppid = parent->tid;
-	return thread__clone_map_groups(thread, parent, do_maps_clone);
+	return thread__clone_maps(thread, parent, do_maps_clone);
 }
 
 void thread__find_cpumode_addr_location(struct thread *thread, u64 addr,
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 51bdb9a7af7f..20b96b5d1f15 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -25,7 +25,7 @@ struct thread {
 		struct rb_node	 rb_node;
 		struct list_head node;
 	};
-	struct map_groups	*mg;
+	struct maps		*maps;
 	pid_t			pid_; /* Not all tools update this */
 	pid_t			tid;
 	pid_t			ppid;
@@ -53,7 +53,7 @@ struct namespaces;
 struct comm;
 
 struct thread *thread__new(pid_t pid, pid_t tid);
-int thread__init_map_groups(struct thread *thread, struct machine *machine);
+int thread__init_maps(struct thread *thread, struct machine *machine);
 void thread__delete(struct thread *thread);
 
 struct thread *thread__get(struct thread *thread);
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index d2a8df01c4a7..7a3dbc259cec 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -81,7 +81,7 @@ static int entry(u64 ip, struct unwind_info *ui)
 		return -1;
 
 	e->ip	  = ip;
-	e->ms.mg  = al.mg;
+	e->ms.maps = al.maps;
 	e->ms.map = al.map;
 	e->ms.sym = al.sym;
 
@@ -200,7 +200,7 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
 	struct unwind_info *ui, ui_buf = {
 		.sample		= data,
 		.thread		= thread,
-		.machine	= thread->mg->machine,
+		.machine	= thread->maps->machine,
 		.cb		= cb,
 		.arg		= arg,
 		.max_stack	= max_stack,
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 6d53347d6744..b4649f5a0c2f 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -578,7 +578,7 @@ static int entry(u64 ip, struct thread *thread,
 	e.ms.sym = thread__find_symbol(thread, PERF_RECORD_MISC_USER, ip, &al);
 	e.ip     = ip;
 	e.ms.map = al.map;
-	e.ms.mg  = al.mg;
+	e.ms.maps = al.maps;
 
 	pr_debug("unwind: %s:ip = 0x%" PRIx64 " (0x%" PRIx64 ")\n",
 		 al.sym ? al.sym->name : "''",
@@ -616,26 +616,26 @@ static unw_accessors_t accessors = {
 	.get_proc_name		= get_proc_name,
 };
 
-static int _unwind__prepare_access(struct map_groups *mg)
+static int _unwind__prepare_access(struct maps *maps)
 {
-	mg->addr_space = unw_create_addr_space(&accessors, 0);
-	if (!mg->addr_space) {
+	maps->addr_space = unw_create_addr_space(&accessors, 0);
+	if (!maps->addr_space) {
 		pr_err("unwind: Can't create unwind address space.\n");
 		return -ENOMEM;
 	}
 
-	unw_set_caching_policy(mg->addr_space, UNW_CACHE_GLOBAL);
+	unw_set_caching_policy(maps->addr_space, UNW_CACHE_GLOBAL);
 	return 0;
 }
 
-static void _unwind__flush_access(struct map_groups *mg)
+static void _unwind__flush_access(struct maps *maps)
 {
-	unw_flush_cache(mg->addr_space, 0, 0);
+	unw_flush_cache(maps->addr_space, 0, 0);
 }
 
-static void _unwind__finish_access(struct map_groups *mg)
+static void _unwind__finish_access(struct maps *maps)
 {
-	unw_destroy_addr_space(mg->addr_space);
+	unw_destroy_addr_space(maps->addr_space);
 }
 
 static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
@@ -660,7 +660,7 @@ static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
 	 */
 	if (max_stack - 1 > 0) {
 		WARN_ONCE(!ui->thread, "WARNING: ui->thread is NULL");
-		addr_space = ui->thread->mg->addr_space;
+		addr_space = ui->thread->maps->addr_space;
 
 		if (addr_space == NULL)
 			return -1;
@@ -709,7 +709,7 @@ static int _unwind__get_entries(unwind_entry_cb_t cb, void *arg,
 	struct unwind_info ui = {
 		.sample       = data,
 		.thread       = thread,
-		.machine      = thread->mg->machine,
+		.machine      = thread->maps->machine,
 	};
 
 	if (!data->user_regs.regs)
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index a24fb57c9b2c..e89a5479b361 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -12,14 +12,12 @@ struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
 struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
 struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops;
 
-static void unwind__register_ops(struct map_groups *mg,
-			  struct unwind_libunwind_ops *ops)
+static void unwind__register_ops(struct maps *maps, struct unwind_libunwind_ops *ops)
 {
-	mg->unwind_libunwind_ops = ops;
+	maps->unwind_libunwind_ops = ops;
 }
 
-int unwind__prepare_access(struct map_groups *mg, struct map *map,
-			   bool *initialized)
+int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized)
 {
 	const char *arch;
 	enum dso_type dso_type;
@@ -29,7 +27,7 @@ int unwind__prepare_access(struct map_groups *mg, struct map *map,
 	if (!dwarf_callchain_users)
 		return 0;
 
-	if (mg->addr_space) {
+	if (maps->addr_space) {
 		pr_debug("unwind: thread map already set, dso=%s\n",
 			 map->dso->name);
 		if (initialized)
@@ -38,14 +36,14 @@ int unwind__prepare_access(struct map_groups *mg, struct map *map,
 	}
 
 	/* env->arch is NULL for live-mode (i.e. perf top) */
-	if (!mg->machine->env || !mg->machine->env->arch)
+	if (!maps->machine->env || !maps->machine->env->arch)
 		goto out_register;
 
-	dso_type = dso__type(map->dso, mg->machine);
+	dso_type = dso__type(map->dso, maps->machine);
 	if (dso_type == DSO__TYPE_UNKNOWN)
 		return 0;
 
-	arch = perf_env__arch(mg->machine->env);
+	arch = perf_env__arch(maps->machine->env);
 
 	if (!strcmp(arch, "x86")) {
 		if (dso_type != DSO__TYPE_64BIT)
@@ -60,31 +58,31 @@ int unwind__prepare_access(struct map_groups *mg, struct map *map,
 		return 0;
 	}
 out_register:
-	unwind__register_ops(mg, ops);
+	unwind__register_ops(maps, ops);
 
-	err = mg->unwind_libunwind_ops->prepare_access(mg);
+	err = maps->unwind_libunwind_ops->prepare_access(maps);
 	if (initialized)
 		*initialized = err ? false : true;
 	return err;
 }
 
-void unwind__flush_access(struct map_groups *mg)
+void unwind__flush_access(struct maps *maps)
 {
-	if (mg->unwind_libunwind_ops)
-		mg->unwind_libunwind_ops->flush_access(mg);
+	if (maps->unwind_libunwind_ops)
+		maps->unwind_libunwind_ops->flush_access(maps);
 }
 
-void unwind__finish_access(struct map_groups *mg)
+void unwind__finish_access(struct maps *maps)
 {
-	if (mg->unwind_libunwind_ops)
-		mg->unwind_libunwind_ops->finish_access(mg);
+	if (maps->unwind_libunwind_ops)
+		maps->unwind_libunwind_ops->finish_access(maps);
 }
 
 int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
 			 struct thread *thread,
 			 struct perf_sample *data, int max_stack)
 {
-	if (thread->mg->unwind_libunwind_ops)
-		return thread->mg->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack);
+	if (thread->maps->unwind_libunwind_ops)
+		return thread->maps->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack);
 	return 0;
 }
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
index 50337c966979..ab8ad469c8de 100644
--- a/tools/perf/util/unwind.h
+++ b/tools/perf/util/unwind.h
@@ -6,7 +6,7 @@
 #include <linux/types.h>
 #include "util/map_symbol.h"
 
-struct map_groups;
+struct maps;
 struct perf_sample;
 struct thread;
 
@@ -18,9 +18,9 @@ struct unwind_entry {
 typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
 
 struct unwind_libunwind_ops {
-	int (*prepare_access)(struct map_groups *mg);
-	void (*flush_access)(struct map_groups *mg);
-	void (*finish_access)(struct map_groups *mg);
+	int (*prepare_access)(struct maps *maps);
+	void (*flush_access)(struct maps *maps);
+	void (*finish_access)(struct maps *maps);
 	int (*get_entries)(unwind_entry_cb_t cb, void *arg,
 			   struct thread *thread,
 			   struct perf_sample *data, int max_stack);
@@ -45,20 +45,19 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
 #endif
 
 int LIBUNWIND__ARCH_REG_ID(int regnum);
-int unwind__prepare_access(struct map_groups *mg, struct map *map,
-			   bool *initialized);
-void unwind__flush_access(struct map_groups *mg);
-void unwind__finish_access(struct map_groups *mg);
+int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized);
+void unwind__flush_access(struct maps *maps);
+void unwind__finish_access(struct maps *maps);
 #else
-static inline int unwind__prepare_access(struct map_groups *mg __maybe_unused,
+static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
 					 struct map *map __maybe_unused,
 					 bool *initialized __maybe_unused)
 {
 	return 0;
 }
 
-static inline void unwind__flush_access(struct map_groups *mg __maybe_unused) {}
-static inline void unwind__finish_access(struct map_groups *mg __maybe_unused) {}
+static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
+static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
 #endif
 #else
 static inline int
@@ -71,14 +70,14 @@ unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
 	return 0;
 }
 
-static inline int unwind__prepare_access(struct map_groups *mg __maybe_unused,
+static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
 					 struct map *map __maybe_unused,
 					 bool *initialized __maybe_unused)
 {
 	return 0;
 }
 
-static inline void unwind__flush_access(struct map_groups *mg __maybe_unused) {}
-static inline void unwind__finish_access(struct map_groups *mg __maybe_unused) {}
+static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
+static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
 #endif /* HAVE_DWARF_UNWIND_SUPPORT */
 #endif /* __UNWIND_H */
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
index 6e00793c10ee..3cc91ad048ea 100644
--- a/tools/perf/util/vdso.c
+++ b/tools/perf/util/vdso.c
@@ -144,7 +144,7 @@ static enum dso_type machine__thread_dso_type(struct machine *machine,
 	enum dso_type dso_type = DSO__TYPE_UNKNOWN;
 	struct map *map;
 
-	map_groups__for_each_entry(thread->mg, map) {
+	maps__for_each_entry(thread->maps, map) {
 		struct dso *dso = map->dso;
 		if (!dso || dso->long_name[0] != '/')
 			continue;