Merge tag 'v5.7-rc1' into locking/kcsan, to resolve conflicts and refresh

Resolve these conflicts:

	arch/x86/Kconfig
	arch/x86/kernel/Makefile

Do a minor "evil merge" to move the KCSAN entry up a bit by a few lines
in the Kconfig to reduce the probability of future conflicts.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

20 files changed, 1879 insertions, 203 deletions

diff --git a/tools/bpf/.gitignore b/tools/bpf/.gitignore
index 59024197e71d..cf53342175e7 100644
--- a/tools/bpf/.gitignore
+++ b/tools/bpf/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 FEATURE-DUMP.bpf
 feature
 bpf_asm
diff --git a/tools/bpf/bpftool/.gitignore b/tools/bpf/bpftool/.gitignore
index b13926432b84..26cde83e1ca3 100644
--- a/tools/bpf/bpftool/.gitignore
+++ b/tools/bpf/bpftool/.gitignore
@@ -1,7 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.d
+/_bpftool
 /bpftool
 bpftool*.8
 bpf-helpers.*
 FEATURE-DUMP.bpftool
 feature
 libbpf
+profiler.skel.h
diff --git a/tools/bpf/bpftool/Documentation/bpftool-feature.rst b/tools/bpf/bpftool/Documentation/bpftool-feature.rst
index 4d08f35034a2..b04156cfd7a3 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-feature.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-feature.rst
@@ -19,19 +19,24 @@ SYNOPSIS
 FEATURE COMMANDS
 ================
 
-|	**bpftool** **feature probe** [*COMPONENT*] [**macros** [**prefix** *PREFIX*]]
+|	**bpftool** **feature probe** [*COMPONENT*] [**full**] [**macros** [**prefix** *PREFIX*]]
 |	**bpftool** **feature help**
 |
 |	*COMPONENT* := { **kernel** | **dev** *NAME* }
 
 DESCRIPTION
 ===========
-	**bpftool feature probe** [**kernel**] [**macros** [**prefix** *PREFIX*]]
+	**bpftool feature probe** [**kernel**] [**full**] [**macros** [**prefix** *PREFIX*]]
 		  Probe the running kernel and dump a number of eBPF-related
 		  parameters, such as availability of the **bpf()** system call,
 		  JIT status, eBPF program types availability, eBPF helper
 		  functions availability, and more.
 
+		  By default, bpftool **does not run probes** for
+		  **bpf_probe_write_user**\ () and **bpf_trace_printk**\()
+		  helpers which print warnings to kernel logs. To enable them
+		  and run all probes, the **full** keyword should be used.
+
 		  If the **macros** keyword (but not the **-j** option) is
 		  passed, a subset of the output is dumped as a list of
 		  **#define** macros that are ready to be included in a C
@@ -44,16 +49,12 @@ DESCRIPTION
 		  Keyword **kernel** can be omitted. If no probe target is
 		  specified, probing the kernel is the default behaviour.
 
-		  Note that when probed, some eBPF helpers (e.g.
-		  **bpf_trace_printk**\ () or **bpf_probe_write_user**\ ()) may
-		  print warnings to kernel logs.
-
-	**bpftool feature probe dev** *NAME* [**macros** [**prefix** *PREFIX*]]
+	**bpftool feature probe dev** *NAME* [**full**] [**macros** [**prefix** *PREFIX*]]
 		  Probe network device for supported eBPF features and dump
 		  results to the console.
 
-		  The two keywords **macros** and **prefix** have the same
-		  role as when probing the kernel.
+		  The keywords **full**, **macros** and **prefix** have the
+		  same role as when probing the kernel.
 
 	**bpftool feature help**
 		  Print short help message.
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
index 64ddf8a4c518..9f19404f470e 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -30,6 +30,7 @@ PROG COMMANDS
 |	**bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*]
 |	**bpftool** **prog tracelog**
 |	**bpftool** **prog run** *PROG* **data_in** *FILE* [**data_out** *FILE* [**data_size_out** *L*]] [**ctx_in** *FILE* [**ctx_out** *FILE* [**ctx_size_out** *M*]]] [**repeat** *N*]
+|	**bpftool** **prog profile** *PROG* [**duration** *DURATION*] *METRICs*
 |	**bpftool** **prog help**
 |
 |	*MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
@@ -42,11 +43,15 @@ PROG COMMANDS
 |		**cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
 |		**cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4** | **cgroup/sendmsg6** |
 |		**cgroup/recvmsg4** | **cgroup/recvmsg6** | **cgroup/sysctl** |
-|		**cgroup/getsockopt** | **cgroup/setsockopt**
+|		**cgroup/getsockopt** | **cgroup/setsockopt** |
+|		**struct_ops** | **fentry** | **fexit** | **freplace**
 |	}
 |       *ATTACH_TYPE* := {
 |		**msg_verdict** | **stream_verdict** | **stream_parser** | **flow_dissector**
 |	}
+|	*METRIC* := {
+|		**cycles** | **instructions** | **l1d_loads** | **llc_misses**
+|	}
 
 
 DESCRIPTION
@@ -188,6 +193,12 @@ DESCRIPTION
 		  not all of them can take the **ctx_in**/**ctx_out**
 		  arguments. bpftool does not perform checks on program types.
 
+	**bpftool prog profile** *PROG* [**duration** *DURATION*] *METRICs*
+		  Profile *METRICs* for bpf program *PROG* for *DURATION*
+		  seconds or until user hits Ctrl-C. *DURATION* is optional.
+		  If *DURATION* is not specified, the profiling will run up to
+		  UINT_MAX seconds.
+
 	**bpftool prog help**
 		  Print short help message.
 
@@ -310,6 +321,15 @@ EXAMPLES
 
 **# rm /sys/fs/bpf/xdp1**
 
+|
+| **# bpftool prog profile id 337 duration 10 cycles instructions llc_misses**
+
+::
+         51397 run_cnt
+      40176203 cycles                                                 (83.05%)
+      42518139 instructions    #   1.06 insns per cycle               (83.39%)
+           123 llc_misses      #   2.89 LLC misses per million insns  (83.15%)
+
 SEE ALSO
 ========
 	**bpf**\ (2),
diff --git a/tools/bpf/bpftool/Documentation/bpftool-struct_ops.rst b/tools/bpf/bpftool/Documentation/bpftool-struct_ops.rst
new file mode 100644
index 000000000000..f045cc89dd6d
--- /dev/null
+++ b/tools/bpf/bpftool/Documentation/bpftool-struct_ops.rst
@@ -0,0 +1,116 @@
+==================
+bpftool-struct_ops
+==================
+-------------------------------------------------------------------------------
+tool to register/unregister/introspect BPF struct_ops
+-------------------------------------------------------------------------------
+
+:Manual section: 8
+
+SYNOPSIS
+========
+
+	**bpftool** [*OPTIONS*] **struct_ops** *COMMAND*
+
+	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] }
+
+	*COMMANDS* :=
+	{ **show** | **list** | **dump** | **register** | **unregister** | **help** }
+
+STRUCT_OPS COMMANDS
+===================
+
+|	**bpftool** **struct_ops { show | list }** [*STRUCT_OPS_MAP*]
+|	**bpftool** **struct_ops dump** [*STRUCT_OPS_MAP*]
+|	**bpftool** **struct_ops register** *OBJ*
+|	**bpftool** **struct_ops unregister** *STRUCT_OPS_MAP*
+|	**bpftool** **struct_ops help**
+|
+|	*STRUCT_OPS_MAP* := { **id** *STRUCT_OPS_MAP_ID* | **name** *STRUCT_OPS_MAP_NAME* }
+|	*OBJ* := /a/file/of/bpf_struct_ops.o
+
+
+DESCRIPTION
+===========
+	**bpftool struct_ops { show | list }** [*STRUCT_OPS_MAP*]
+		  Show brief information about the struct_ops in the system.
+		  If *STRUCT_OPS_MAP* is specified, it shows information only
+		  for the given struct_ops.  Otherwise, it lists all struct_ops
+		  currently existing in the system.
+
+		  Output will start with struct_ops map ID, followed by its map
+		  name and its struct_ops's kernel type.
+
+	**bpftool struct_ops dump** [*STRUCT_OPS_MAP*]
+		  Dump details information about the struct_ops in the system.
+		  If *STRUCT_OPS_MAP* is specified, it dumps information only
+		  for the given struct_ops.  Otherwise, it dumps all struct_ops
+		  currently existing in the system.
+
+	**bpftool struct_ops register** *OBJ*
+		  Register bpf struct_ops from *OBJ*.  All struct_ops under
+		  the ELF section ".struct_ops" will be registered to
+		  its kernel subsystem.
+
+	**bpftool struct_ops unregister**  *STRUCT_OPS_MAP*
+		  Unregister the *STRUCT_OPS_MAP* from the kernel subsystem.
+
+	**bpftool struct_ops help**
+		  Print short help message.
+
+OPTIONS
+=======
+	-h, --help
+		  Print short generic help message (similar to **bpftool help**).
+
+	-V, --version
+		  Print version number (similar to **bpftool version**).
+
+	-j, --json
+		  Generate JSON output. For commands that cannot produce JSON, this
+		  option has no effect.
+
+	-p, --pretty
+		  Generate human-readable JSON output. Implies **-j**.
+
+	-d, --debug
+		  Print all logs available, even debug-level information. This
+		  includes logs from libbpf as well as from the verifier, when
+		  attempting to load programs.
+
+EXAMPLES
+========
+**# bpftool struct_ops show**
+
+::
+
+    100: dctcp           tcp_congestion_ops
+    105: cubic           tcp_congestion_ops
+
+**# bpftool struct_ops unregister id 105**
+
+::
+
+   Unregistered tcp_congestion_ops cubic id 105
+
+**# bpftool struct_ops register bpf_cubic.o**
+
+::
+
+   Registered tcp_congestion_ops cubic id 110
+
+
+SEE ALSO
+========
+	**bpf**\ (2),
+	**bpf-helpers**\ (7),
+	**bpftool**\ (8),
+	**bpftool-prog**\ (8),
+	**bpftool-map**\ (8),
+	**bpftool-cgroup**\ (8),
+	**bpftool-feature**\ (8),
+	**bpftool-net**\ (8),
+	**bpftool-perf**\ (8),
+	**bpftool-btf**\ (8)
+	**bpftool-gen**\ (8)
+	
diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index c4e810335810..f584d1fdfc64 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -59,10 +59,12 @@ LIBS = $(LIBBPF) -lelf -lz
 
 INSTALL ?= install
 RM ?= rm -f
+CLANG ?= clang
 
 FEATURE_USER = .bpftool
-FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib
-FEATURE_DISPLAY = libbfd disassembler-four-args zlib
+FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib \
+	clang-bpf-global-var
+FEATURE_DISPLAY = libbfd disassembler-four-args zlib clang-bpf-global-var
 
 check_feat := 1
 NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall
@@ -110,14 +112,39 @@ SRCS += $(BFD_SRCS)
 endif
 
 OBJS = $(patsubst %.c,$(OUTPUT)%.o,$(SRCS)) $(OUTPUT)disasm.o
+_OBJS = $(filter-out $(OUTPUT)prog.o,$(OBJS)) $(OUTPUT)_prog.o
+
+ifeq ($(feature-clang-bpf-global-var),1)
+	__OBJS = $(OBJS)
+else
+	__OBJS = $(_OBJS)
+endif
+
+$(OUTPUT)_prog.o: prog.c
+	$(QUIET_CC)$(COMPILE.c) -MMD -DBPFTOOL_WITHOUT_SKELETONS -o $@ $<
+
+$(OUTPUT)_bpftool: $(_OBJS) $(LIBBPF)
+	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(_OBJS) $(LIBS)
+
+skeleton/profiler.bpf.o: skeleton/profiler.bpf.c $(LIBBPF)
+	$(QUIET_CLANG)$(CLANG) \
+		-I$(srctree)/tools/include/uapi/ \
+		-I$(LIBBPF_PATH) -I$(srctree)/tools/lib \
+		-g -O2 -target bpf -c $< -o $@
+
+profiler.skel.h: $(OUTPUT)_bpftool skeleton/profiler.bpf.o
+	$(QUIET_GEN)$(OUTPUT)./_bpftool gen skeleton skeleton/profiler.bpf.o > $@
+
+$(OUTPUT)prog.o: prog.c profiler.skel.h
+	$(QUIET_CC)$(COMPILE.c) -MMD -o $@ $<
 
 $(OUTPUT)disasm.o: $(srctree)/kernel/bpf/disasm.c
 	$(QUIET_CC)$(COMPILE.c) -MMD -o $@ $<
 
 $(OUTPUT)feature.o: | zdep
 
-$(OUTPUT)bpftool: $(OBJS) $(LIBBPF)
-	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
+$(OUTPUT)bpftool: $(__OBJS) $(LIBBPF)
+	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(__OBJS) $(LIBS)
 
 $(OUTPUT)%.o: %.c
 	$(QUIET_CC)$(COMPILE.c) -MMD -o $@ $<
@@ -125,6 +152,7 @@ $(OUTPUT)%.o: %.c
 clean: $(LIBBPF)-clean
 	$(call QUIET_CLEAN, bpftool)
 	$(Q)$(RM) -- $(OUTPUT)bpftool $(OUTPUT)*.o $(OUTPUT)*.d
+	$(Q)$(RM) -- $(OUTPUT)_bpftool profiler.skel.h skeleton/profiler.bpf.o
 	$(Q)$(RM) -r -- $(OUTPUT)libbpf/
 	$(call QUIET_CLEAN, core-gen)
 	$(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpftool
diff --git a/tools/bpf/bpftool/bash-completion/bpftool b/tools/bpf/bpftool/bash-completion/bpftool
index 754d8395e451..45ee99b159e2 100644
--- a/tools/bpf/bpftool/bash-completion/bpftool
+++ b/tools/bpf/bpftool/bash-completion/bpftool
@@ -337,6 +337,7 @@ _bpftool()
 
             local PROG_TYPE='id pinned tag name'
             local MAP_TYPE='id pinned name'
+            local METRIC_TYPE='cycles instructions l1d_loads llc_misses'
             case $command in
                 show|list)
                     [[ $prev != "$command" ]] && return 0
@@ -388,7 +389,7 @@ _bpftool()
                                     _bpftool_get_prog_ids
                                     ;;
                                 name)
-                                    _bpftool_get_map_names
+                                    _bpftool_get_prog_names
                                     ;;
                                 pinned)
                                     _filedir
@@ -469,7 +470,8 @@ _bpftool()
                                 cgroup/recvmsg4 cgroup/recvmsg6 \
                                 cgroup/post_bind4 cgroup/post_bind6 \
                                 cgroup/sysctl cgroup/getsockopt \
-                                cgroup/setsockopt" -- \
+                                cgroup/setsockopt struct_ops \
+                                fentry fexit freplace" -- \
                                                    "$cur" ) )
                             return 0
                             ;;
@@ -497,9 +499,51 @@ _bpftool()
                 tracelog)
                     return 0
                     ;;
+                profile)
+                    case $cword in
+                        3)
+                            COMPREPLY=( $( compgen -W "$PROG_TYPE" -- "$cur" ) )
+                            return 0
+                            ;;
+                        4)
+                            case $prev in
+                                id)
+                                    _bpftool_get_prog_ids
+                                    ;;
+                                name)
+                                    _bpftool_get_prog_names
+                                    ;;
+                                pinned)
+                                    _filedir
+                                    ;;
+                            esac
+                            return 0
+                            ;;
+                        5)
+                            COMPREPLY=( $( compgen -W "$METRIC_TYPE duration" -- "$cur" ) )
+                            return 0
+                            ;;
+                        6)
+                            case $prev in
+                                duration)
+                                    return 0
+                                    ;;
+                                *)
+                                    COMPREPLY=( $( compgen -W "$METRIC_TYPE" -- "$cur" ) )
+                                    return 0
+                                    ;;
+                            esac
+                            return 0
+                            ;;
+                        *)
+                            COMPREPLY=( $( compgen -W "$METRIC_TYPE" -- "$cur" ) )
+                            return 0
+                            ;;
+                    esac
+                    ;;
                 run)
-                    if [[ ${#words[@]} -lt 5 ]]; then
-                        _filedir
+                    if [[ ${#words[@]} -eq 4 ]]; then
+                        COMPREPLY=( $( compgen -W "$PROG_TYPE" -- "$cur" ) )
                         return 0
                     fi
                     case $prev in
@@ -507,6 +551,10 @@ _bpftool()
                             _bpftool_get_prog_ids
                             return 0
                             ;;
+                        name)
+                            _bpftool_get_prog_names
+                            return 0
+                            ;;
                         data_in|data_out|ctx_in|ctx_out)
                             _filedir
                             return 0
@@ -524,7 +572,35 @@ _bpftool()
                 *)
                     [[ $prev == $object ]] && \
                         COMPREPLY=( $( compgen -W 'dump help pin attach detach \
-                            load loadall show list tracelog run' -- "$cur" ) )
+                            load loadall show list tracelog run profile' -- "$cur" ) )
+                    ;;
+            esac
+            ;;
+        struct_ops)
+            local STRUCT_OPS_TYPE='id name'
+            case $command in
+                show|list|dump|unregister)
+                    case $prev in
+                        $command)
+                            COMPREPLY=( $( compgen -W "$STRUCT_OPS_TYPE" -- "$cur" ) )
+                            ;;
+                        id)
+                            _bpftool_get_map_ids_for_type struct_ops
+                            ;;
+                        name)
+                            _bpftool_get_map_names_for_type struct_ops
+                            ;;
+                    esac
+                    return 0
+                    ;;
+                register)
+                    _filedir
+                    return 0
+                    ;;
+                *)
+                    [[ $prev == $object ]] && \
+                        COMPREPLY=( $( compgen -W 'register unregister show list dump help' \
+                            -- "$cur" ) )
                     ;;
             esac
             ;;
@@ -712,11 +788,17 @@ _bpftool()
                     esac
                     ;;
                 pin)
-                    if [[ $prev == "$command" ]]; then
-                        COMPREPLY=( $( compgen -W "$PROG_TYPE" -- "$cur" ) )
-                    else
-                        _filedir
-                    fi
+                    case $prev in
+                        $command)
+                            COMPREPLY=( $( compgen -W "$MAP_TYPE" -- "$cur" ) )
+                            ;;
+                        id)
+                            _bpftool_get_map_ids
+                            ;;
+                        name)
+                            _bpftool_get_map_names
+                            ;;
+                    esac
                     return 0
                     ;;
                 event_pipe)
@@ -843,7 +925,7 @@ _bpftool()
             case $command in
                 skeleton)
                     _filedir
-		    ;;
+                    ;;
                 *)
                     [[ $prev == $object ]] && \
                         COMPREPLY=( $( compgen -W 'skeleton help' -- "$cur" ) )
@@ -943,6 +1025,9 @@ _bpftool()
                                 id)
                                     _bpftool_get_prog_ids
                                     ;;
+                                name)
+                                    _bpftool_get_prog_names
+                                    ;;
                                 pinned)
                                     _filedir
                                     ;;
@@ -983,11 +1068,12 @@ _bpftool()
                 probe)
                     [[ $prev == "prefix" ]] && return 0
                     if _bpftool_search_list 'macros'; then
-                        COMPREPLY+=( $( compgen -W 'prefix' -- "$cur" ) )
+                        _bpftool_once_attr 'prefix'
                     else
                         COMPREPLY+=( $( compgen -W 'macros' -- "$cur" ) )
                     fi
                     _bpftool_one_of_list 'kernel dev'
+                    _bpftool_once_attr 'full'
                     return 0
                     ;;
                 *)
diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index b3745ed711ba..bcaf55b59498 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -389,6 +389,9 @@ static int dump_btf_c(const struct btf *btf,
 	if (IS_ERR(d))
 		return PTR_ERR(d);
 
+	printf("#ifndef __VMLINUX_H__\n");
+	printf("#define __VMLINUX_H__\n");
+	printf("\n");
 	printf("#ifndef BPF_NO_PRESERVE_ACCESS_INDEX\n");
 	printf("#pragma clang attribute push (__attribute__((preserve_access_index)), apply_to = record)\n");
 	printf("#endif\n\n");
@@ -412,6 +415,8 @@ static int dump_btf_c(const struct btf *btf,
 	printf("#ifndef BPF_NO_PRESERVE_ACCESS_INDEX\n");
 	printf("#pragma clang attribute pop\n");
 	printf("#endif\n");
+	printf("\n");
+	printf("#endif /* __VMLINUX_H__ */\n");
 
 done:
 	btf_dump__free(d);
diff --git a/tools/bpf/bpftool/btf_dumper.c b/tools/bpf/bpftool/btf_dumper.c
index 01cc52b834fa..497807bec675 100644
--- a/tools/bpf/bpftool/btf_dumper.c
+++ b/tools/bpf/bpftool/btf_dumper.c
@@ -4,11 +4,13 @@
 #include <ctype.h>
 #include <stdio.h> /* for (FILE *) used by json_writer */
 #include <string.h>
+#include <unistd.h>
 #include <asm/byteorder.h>
 #include <linux/bitops.h>
 #include <linux/btf.h>
 #include <linux/err.h>
 #include <bpf/btf.h>
+#include <bpf/bpf.h>
 
 #include "json_writer.h"
 #include "main.h"
@@ -22,13 +24,102 @@
 static int btf_dumper_do_type(const struct btf_dumper *d, __u32 type_id,
 			      __u8 bit_offset, const void *data);
 
-static void btf_dumper_ptr(const void *data, json_writer_t *jw,
-			   bool is_plain_text)
+static int btf_dump_func(const struct btf *btf, char *func_sig,
+			 const struct btf_type *func_proto,
+			 const struct btf_type *func, int pos, int size);
+
+static int dump_prog_id_as_func_ptr(const struct btf_dumper *d,
+				    const struct btf_type *func_proto,
+				    __u32 prog_id)
 {
-	if (is_plain_text)
-		jsonw_printf(jw, "%p", *(void **)data);
+	struct bpf_prog_info_linear *prog_info = NULL;
+	const struct btf_type *func_type;
+	const char *prog_name = NULL;
+	struct bpf_func_info *finfo;
+	struct btf *prog_btf = NULL;
+	struct bpf_prog_info *info;
+	int prog_fd, func_sig_len;
+	char prog_str[1024];
+
+	/* Get the ptr's func_proto */
+	func_sig_len = btf_dump_func(d->btf, prog_str, func_proto, NULL, 0,
+				     sizeof(prog_str));
+	if (func_sig_len == -1)
+		return -1;
+
+	if (!prog_id)
+		goto print;
+
+	/* Get the bpf_prog's name.  Obtain from func_info. */
+	prog_fd = bpf_prog_get_fd_by_id(prog_id);
+	if (prog_fd == -1)
+		goto print;
+
+	prog_info = bpf_program__get_prog_info_linear(prog_fd,
+						1UL << BPF_PROG_INFO_FUNC_INFO);
+	close(prog_fd);
+	if (IS_ERR(prog_info)) {
+		prog_info = NULL;
+		goto print;
+	}
+	info = &prog_info->info;
+
+	if (!info->btf_id || !info->nr_func_info ||
+	    btf__get_from_id(info->btf_id, &prog_btf))
+		goto print;
+	finfo = (struct bpf_func_info *)info->func_info;
+	func_type = btf__type_by_id(prog_btf, finfo->type_id);
+	if (!func_type || !btf_is_func(func_type))
+		goto print;
+
+	prog_name = btf__name_by_offset(prog_btf, func_type->name_off);
+
+print:
+	if (!prog_id)
+		snprintf(&prog_str[func_sig_len],
+			 sizeof(prog_str) - func_sig_len, " 0");
+	else if (prog_name)
+		snprintf(&prog_str[func_sig_len],
+			 sizeof(prog_str) - func_sig_len,
+			 " %s/prog_id:%u", prog_name, prog_id);
 	else
-		jsonw_printf(jw, "%lu", *(unsigned long *)data);
+		snprintf(&prog_str[func_sig_len],
+			 sizeof(prog_str) - func_sig_len,
+			 " <unknown_prog_name>/prog_id:%u", prog_id);
+
+	prog_str[sizeof(prog_str) - 1] = '\0';
+	jsonw_string(d->jw, prog_str);
+	btf__free(prog_btf);
+	free(prog_info);
+	return 0;
+}
+
+static void btf_dumper_ptr(const struct btf_dumper *d,
+			   const struct btf_type *t,
+			   const void *data)
+{
+	unsigned long value = *(unsigned long *)data;
+	const struct btf_type *ptr_type;
+	__s32 ptr_type_id;
+
+	if (!d->prog_id_as_func_ptr || value > UINT32_MAX)
+		goto print_ptr_value;
+
+	ptr_type_id = btf__resolve_type(d->btf, t->type);
+	if (ptr_type_id < 0)
+		goto print_ptr_value;
+	ptr_type = btf__type_by_id(d->btf, ptr_type_id);
+	if (!ptr_type || !btf_is_func_proto(ptr_type))
+		goto print_ptr_value;
+
+	if (!dump_prog_id_as_func_ptr(d, ptr_type, value))
+		return;
+
+print_ptr_value:
+	if (d->is_plain_text)
+		jsonw_printf(d->jw, "%p", (void *)value);
+	else
+		jsonw_printf(d->jw, "%lu", value);
 }
 
 static int btf_dumper_modifier(const struct btf_dumper *d, __u32 type_id,
@@ -43,9 +134,78 @@ static int btf_dumper_modifier(const struct btf_dumper *d, __u32 type_id,
 	return btf_dumper_do_type(d, actual_type_id, bit_offset, data);
 }
 
-static void btf_dumper_enum(const void *data, json_writer_t *jw)
+static int btf_dumper_enum(const struct btf_dumper *d,
+			    const struct btf_type *t,
+			    const void *data)
+{
+	const struct btf_enum *enums = btf_enum(t);
+	__s64 value;
+	__u16 i;
+
+	switch (t->size) {
+	case 8:
+		value = *(__s64 *)data;
+		break;
+	case 4:
+		value = *(__s32 *)data;
+		break;
+	case 2:
+		value = *(__s16 *)data;
+		break;
+	case 1:
+		value = *(__s8 *)data;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	for (i = 0; i < btf_vlen(t); i++) {
+		if (value == enums[i].val) {
+			jsonw_string(d->jw,
+				     btf__name_by_offset(d->btf,
+							 enums[i].name_off));
+			return 0;
+		}
+	}
+
+	jsonw_int(d->jw, value);
+	return 0;
+}
+
+static bool is_str_array(const struct btf *btf, const struct btf_array *arr,
+			 const char *s)
 {
-	jsonw_printf(jw, "%d", *(int *)data);
+	const struct btf_type *elem_type;
+	const char *end_s;
+
+	if (!arr->nelems)
+		return false;
+
+	elem_type = btf__type_by_id(btf, arr->type);
+	/* Not skipping typedef.  typedef to char does not count as
+	 * a string now.
+	 */
+	while (elem_type && btf_is_mod(elem_type))
+		elem_type = btf__type_by_id(btf, elem_type->type);
+
+	if (!elem_type || !btf_is_int(elem_type) || elem_type->size != 1)
+		return false;
+
+	if (btf_int_encoding(elem_type) != BTF_INT_CHAR &&
+	    strcmp("char", btf__name_by_offset(btf, elem_type->name_off)))
+		return false;
+
+	end_s = s + arr->nelems;
+	while (s < end_s) {
+		if (!*s)
+			return true;
+		if (*s <= 0x1f || *s >= 0x7f)
+			return false;
+		s++;
+	}
+
+	/* '\0' is not found */
+	return false;
 }
 
 static int btf_dumper_array(const struct btf_dumper *d, __u32 type_id,
@@ -57,6 +217,11 @@ static int btf_dumper_array(const struct btf_dumper *d, __u32 type_id,
 	int ret = 0;
 	__u32 i;
 
+	if (is_str_array(d->btf, arr, data)) {
+		jsonw_string(d->jw, data);
+		return 0;
+	}
+
 	elem_size = btf__resolve_size(d->btf, arr->type);
 	if (elem_size < 0)
 		return elem_size;
@@ -366,10 +531,9 @@ static int btf_dumper_do_type(const struct btf_dumper *d, __u32 type_id,
 	case BTF_KIND_ARRAY:
 		return btf_dumper_array(d, type_id, data);
 	case BTF_KIND_ENUM:
-		btf_dumper_enum(data, d->jw);
-		return 0;
+		return btf_dumper_enum(d, t, data);
 	case BTF_KIND_PTR:
-		btf_dumper_ptr(data, d->jw, d->is_plain_text);
+		btf_dumper_ptr(d, t, data);
 		return 0;
 	case BTF_KIND_UNKN:
 		jsonw_printf(d->jw, "(unknown)");
@@ -414,10 +578,6 @@ int btf_dumper_type(const struct btf_dumper *d, __u32 type_id,
 			return -1;					\
 	} while (0)
 
-static int btf_dump_func(const struct btf *btf, char *func_sig,
-			 const struct btf_type *func_proto,
-			 const struct btf_type *func, int pos, int size);
-
 static int __btf_dumper_type_only(const struct btf *btf, __u32 type_id,
 				  char *func_sig, int pos, int size)
 {
@@ -526,8 +686,15 @@ static int btf_dump_func(const struct btf *btf, char *func_sig,
 			BTF_PRINT_ARG(", ");
 		if (arg->type) {
 			BTF_PRINT_TYPE(arg->type);
-			BTF_PRINT_ARG("%s",
-				      btf__name_by_offset(btf, arg->name_off));
+			if (arg->name_off)
+				BTF_PRINT_ARG("%s",
+					      btf__name_by_offset(btf, arg->name_off));
+			else if (pos && func_sig[pos - 1] == ' ')
+				/* Remove unnecessary space for
+				 * FUNC_PROTO that does not have
+				 * arg->name_off
+				 */
+				func_sig[--pos] = '\0';
 		} else {
 			BTF_PRINT_ARG("...");
 		}
diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c
index b75b8ec5469c..f2223dbdfb0a 100644
--- a/tools/bpf/bpftool/common.c
+++ b/tools/bpf/bpftool/common.c
@@ -211,39 +211,14 @@ int do_pin_fd(int fd, const char *name)
 	return err;
 }
 
-int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32))
+int do_pin_any(int argc, char **argv, int (*get_fd)(int *, char ***))
 {
-	unsigned int id;
-	char *endptr;
 	int err;
 	int fd;
 
-	if (argc < 3) {
-		p_err("too few arguments, id ID and FILE path is required");
-		return -1;
-	} else if (argc > 3) {
-		p_err("too many arguments");
-		return -1;
-	}
-
-	if (!is_prefix(*argv, "id")) {
-		p_err("expected 'id' got %s", *argv);
-		return -1;
-	}
-	NEXT_ARG();
-
-	id = strtoul(*argv, &endptr, 0);
-	if (*endptr) {
-		p_err("can't parse %s as ID", *argv);
-		return -1;
-	}
-	NEXT_ARG();
-
-	fd = get_fd_by_id(id);
-	if (fd < 0) {
-		p_err("can't open object by id (%u): %s", id, strerror(errno));
-		return -1;
-	}
+	fd = get_fd(&argc, &argv);
+	if (fd < 0)
+		return fd;
 
 	err = do_pin_fd(fd, *argv);
 
@@ -597,3 +572,10 @@ int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what)
 
 	return 0;
 }
+
+int __printf(2, 0)
+print_all_levels(__maybe_unused enum libbpf_print_level level,
+		 const char *format, va_list args)
+{
+	return vfprintf(stderr, format, args);
+}
diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c
index 941873d778d8..88718ee6a438 100644
--- a/tools/bpf/bpftool/feature.c
+++ b/tools/bpf/bpftool/feature.c
@@ -112,18 +112,12 @@ print_start_section(const char *json_title, const char *plain_title,
 	}
 }
 
-static void
-print_end_then_start_section(const char *json_title, const char *plain_title,
-			     const char *define_comment,
-			     const char *define_prefix)
+static void print_end_section(void)
 {
 	if (json_output)
 		jsonw_end_object(json_wtr);
 	else
 		printf("\n");
-
-	print_start_section(json_title, plain_title, define_comment,
-			    define_prefix);
 }
 
 /* Probing functions */
@@ -520,13 +514,38 @@ probe_map_type(enum bpf_map_type map_type, const char *define_prefix,
 }
 
 static void
+probe_helper_for_progtype(enum bpf_prog_type prog_type, bool supported_type,
+			  const char *define_prefix, unsigned int id,
+			  const char *ptype_name, __u32 ifindex)
+{
+	bool res;
+
+	if (!supported_type)
+		res = false;
+	else
+		res = bpf_probe_helper(id, prog_type, ifindex);
+
+	if (json_output) {
+		if (res)
+			jsonw_string(json_wtr, helper_name[id]);
+	} else if (define_prefix) {
+		printf("#define %sBPF__PROG_TYPE_%s__HELPER_%s %s\n",
+		       define_prefix, ptype_name, helper_name[id],
+		       res ? "1" : "0");
+	} else {
+		if (res)
+			printf("\n\t- %s", helper_name[id]);
+	}
+}
+
+static void
 probe_helpers_for_progtype(enum bpf_prog_type prog_type, bool supported_type,
-			   const char *define_prefix, __u32 ifindex)
+			   const char *define_prefix, bool full_mode,
+			   __u32 ifindex)
 {
 	const char *ptype_name = prog_type_name[prog_type];
 	char feat_name[128];
 	unsigned int id;
-	bool res;
 
 	if (ifindex)
 		/* Only test helpers for offload-able program types */
@@ -548,21 +567,19 @@ probe_helpers_for_progtype(enum bpf_prog_type prog_type, bool supported_type,
 	}
 
 	for (id = 1; id < ARRAY_SIZE(helper_name); id++) {
-		if (!supported_type)
-			res = false;
-		else
-			res = bpf_probe_helper(id, prog_type, ifindex);
-
-		if (json_output) {
-			if (res)
-				jsonw_string(json_wtr, helper_name[id]);
-		} else if (define_prefix) {
-			printf("#define %sBPF__PROG_TYPE_%s__HELPER_%s %s\n",
-			       define_prefix, ptype_name, helper_name[id],
-			       res ? "1" : "0");
-		} else {
-			if (res)
-				printf("\n\t- %s", helper_name[id]);
+		/* Skip helper functions which emit dmesg messages when not in
+		 * the full mode.
+		 */
+		switch (id) {
+		case BPF_FUNC_trace_printk:
+		case BPF_FUNC_probe_write_user:
+			if (!full_mode)
+				continue;
+			/* fallthrough */
+		default:
+			probe_helper_for_progtype(prog_type, supported_type,
+						  define_prefix, id, ptype_name,
+						  ifindex);
 		}
 	}
 
@@ -584,13 +601,132 @@ probe_large_insn_limit(const char *define_prefix, __u32 ifindex)
 			   res, define_prefix);
 }
 
+static void
+section_system_config(enum probe_component target, const char *define_prefix)
+{
+	switch (target) {
+	case COMPONENT_KERNEL:
+	case COMPONENT_UNSPEC:
+		if (define_prefix)
+			break;
+
+		print_start_section("system_config",
+				    "Scanning system configuration...",
+				    NULL, /* define_comment never used here */
+				    NULL); /* define_prefix always NULL here */
+		if (check_procfs()) {
+			probe_unprivileged_disabled();
+			probe_jit_enable();
+			probe_jit_harden();
+			probe_jit_kallsyms();
+			probe_jit_limit();
+		} else {
+			p_info("/* procfs not mounted, skipping related probes */");
+		}
+		probe_kernel_image_config();
+		print_end_section();
+		break;
+	default:
+		break;
+	}
+}
+
+static bool section_syscall_config(const char *define_prefix)
+{
+	bool res;
+
+	print_start_section("syscall_config",
+			    "Scanning system call availability...",
+			    "/*** System call availability ***/",
+			    define_prefix);
+	res = probe_bpf_syscall(define_prefix);
+	print_end_section();
+
+	return res;
+}
+
+static void
+section_program_types(bool *supported_types, const char *define_prefix,
+		      __u32 ifindex)
+{
+	unsigned int i;
+
+	print_start_section("program_types",
+			    "Scanning eBPF program types...",
+			    "/*** eBPF program types ***/",
+			    define_prefix);
+
+	for (i = BPF_PROG_TYPE_UNSPEC + 1; i < ARRAY_SIZE(prog_type_name); i++)
+		probe_prog_type(i, supported_types, define_prefix, ifindex);
+
+	print_end_section();
+}
+
+static void section_map_types(const char *define_prefix, __u32 ifindex)
+{
+	unsigned int i;
+
+	print_start_section("map_types",
+			    "Scanning eBPF map types...",
+			    "/*** eBPF map types ***/",
+			    define_prefix);
+
+	for (i = BPF_MAP_TYPE_UNSPEC + 1; i < map_type_name_size; i++)
+		probe_map_type(i, define_prefix, ifindex);
+
+	print_end_section();
+}
+
+static void
+section_helpers(bool *supported_types, const char *define_prefix,
+		bool full_mode, __u32 ifindex)
+{
+	unsigned int i;
+
+	print_start_section("helpers",
+			    "Scanning eBPF helper functions...",
+			    "/*** eBPF helper functions ***/",
+			    define_prefix);
+
+	if (define_prefix)
+		printf("/*\n"
+		       " * Use %sHAVE_PROG_TYPE_HELPER(prog_type_name, helper_name)\n"
+		       " * to determine if <helper_name> is available for <prog_type_name>,\n"
+		       " * e.g.\n"
+		       " *	#if %sHAVE_PROG_TYPE_HELPER(xdp, bpf_redirect)\n"
+		       " *		// do stuff with this helper\n"
+		       " *	#elif\n"
+		       " *		// use a workaround\n"
+		       " *	#endif\n"
+		       " */\n"
+		       "#define %sHAVE_PROG_TYPE_HELPER(prog_type, helper)	\\\n"
+		       "	%sBPF__PROG_TYPE_ ## prog_type ## __HELPER_ ## helper\n",
+		       define_prefix, define_prefix, define_prefix,
+		       define_prefix);
+	for (i = BPF_PROG_TYPE_UNSPEC + 1; i < ARRAY_SIZE(prog_type_name); i++)
+		probe_helpers_for_progtype(i, supported_types[i],
+					   define_prefix, full_mode, ifindex);
+
+	print_end_section();
+}
+
+static void section_misc(const char *define_prefix, __u32 ifindex)
+{
+	print_start_section("misc",
+			    "Scanning miscellaneous eBPF features...",
+			    "/*** eBPF misc features ***/",
+			    define_prefix);
+	probe_large_insn_limit(define_prefix, ifindex);
+	print_end_section();
+}
+
 static int do_probe(int argc, char **argv)
 {
 	enum probe_component target = COMPONENT_UNSPEC;
 	const char *define_prefix = NULL;
 	bool supported_types[128] = {};
+	bool full_mode = false;
 	__u32 ifindex = 0;
-	unsigned int i;
 	char *ifname;
 
 	/* Detection assumes user has sufficient privileges (CAP_SYS_ADMIN).
@@ -629,6 +765,9 @@ static int do_probe(int argc, char **argv)
 				      strerror(errno));
 				return -1;
 			}
+		} else if (is_prefix(*argv, "full")) {
+			full_mode = true;
+			NEXT_ARG();
 		} else if (is_prefix(*argv, "macros") && !define_prefix) {
 			define_prefix = "";
 			NEXT_ARG();
@@ -658,97 +797,19 @@ static int do_probe(int argc, char **argv)
 		jsonw_start_object(json_wtr);
 	}
 
-	switch (target) {
-	case COMPONENT_KERNEL:
-	case COMPONENT_UNSPEC:
-		if (define_prefix)
-			break;
-
-		print_start_section("system_config",
-				    "Scanning system configuration...",
-				    NULL, /* define_comment never used here */
-				    NULL); /* define_prefix always NULL here */
-		if (check_procfs()) {
-			probe_unprivileged_disabled();
-			probe_jit_enable();
-			probe_jit_harden();
-			probe_jit_kallsyms();
-			probe_jit_limit();
-		} else {
-			p_info("/* procfs not mounted, skipping related probes */");
-		}
-		probe_kernel_image_config();
-		if (json_output)
-			jsonw_end_object(json_wtr);
-		else
-			printf("\n");
-		break;
-	default:
-		break;
-	}
-
-	print_start_section("syscall_config",
-			    "Scanning system call availability...",
-			    "/*** System call availability ***/",
-			    define_prefix);
-
-	if (!probe_bpf_syscall(define_prefix))
+	section_system_config(target, define_prefix);
+	if (!section_syscall_config(define_prefix))
 		/* bpf() syscall unavailable, don't probe other BPF features */
 		goto exit_close_json;
-
-	print_end_then_start_section("program_types",
-				     "Scanning eBPF program types...",
-				     "/*** eBPF program types ***/",
-				     define_prefix);
-
-	for (i = BPF_PROG_TYPE_UNSPEC + 1; i < ARRAY_SIZE(prog_type_name); i++)
-		probe_prog_type(i, supported_types, define_prefix, ifindex);
-
-	print_end_then_start_section("map_types",
-				     "Scanning eBPF map types...",
-				     "/*** eBPF map types ***/",
-				     define_prefix);
-
-	for (i = BPF_MAP_TYPE_UNSPEC + 1; i < map_type_name_size; i++)
-		probe_map_type(i, define_prefix, ifindex);
-
-	print_end_then_start_section("helpers",
-				     "Scanning eBPF helper functions...",
-				     "/*** eBPF helper functions ***/",
-				     define_prefix);
-
-	if (define_prefix)
-		printf("/*\n"
-		       " * Use %sHAVE_PROG_TYPE_HELPER(prog_type_name, helper_name)\n"
-		       " * to determine if <helper_name> is available for <prog_type_name>,\n"
-		       " * e.g.\n"
-		       " *	#if %sHAVE_PROG_TYPE_HELPER(xdp, bpf_redirect)\n"
-		       " *		// do stuff with this helper\n"
-		       " *	#elif\n"
-		       " *		// use a workaround\n"
-		       " *	#endif\n"
-		       " */\n"
-		       "#define %sHAVE_PROG_TYPE_HELPER(prog_type, helper)	\\\n"
-		       "	%sBPF__PROG_TYPE_ ## prog_type ## __HELPER_ ## helper\n",
-		       define_prefix, define_prefix, define_prefix,
-		       define_prefix);
-	for (i = BPF_PROG_TYPE_UNSPEC + 1; i < ARRAY_SIZE(prog_type_name); i++)
-		probe_helpers_for_progtype(i, supported_types[i],
-					   define_prefix, ifindex);
-
-	print_end_then_start_section("misc",
-				     "Scanning miscellaneous eBPF features...",
-				     "/*** eBPF misc features ***/",
-				     define_prefix);
-	probe_large_insn_limit(define_prefix, ifindex);
+	section_program_types(supported_types, define_prefix, ifindex);
+	section_map_types(define_prefix, ifindex);
+	section_helpers(supported_types, define_prefix, full_mode, ifindex);
+	section_misc(define_prefix, ifindex);
 
 exit_close_json:
-	if (json_output) {
-		/* End current "section" of probes */
-		jsonw_end_object(json_wtr);
+	if (json_output)
 		/* End root object */
 		jsonw_end_object(json_wtr);
-	}
 
 	return 0;
 }
@@ -761,7 +822,7 @@ static int do_help(int argc, char **argv)
 	}
 
 	fprintf(stderr,
-		"Usage: %s %s probe [COMPONENT] [macros [prefix PREFIX]]\n"
+		"Usage: %s %s probe [COMPONENT] [full] [macros [prefix PREFIX]]\n"
 		"       %s %s help\n"
 		"\n"
 		"       COMPONENT := { kernel | dev NAME }\n"
diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 6d41bbfc6459..466c269eabdd 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -58,7 +58,7 @@ static int do_help(int argc, char **argv)
 		"       %s batch file FILE\n"
 		"       %s version\n"
 		"\n"
-		"       OBJECT := { prog | map | cgroup | perf | net | feature | btf | gen }\n"
+		"       OBJECT := { prog | map | cgroup | perf | net | feature | btf | gen | struct_ops }\n"
 		"       " HELP_SPEC_OPTIONS "\n"
 		"",
 		bin_name, bin_name, bin_name);
@@ -79,13 +79,6 @@ static int do_version(int argc, char **argv)
 	return 0;
 }
 
-static int __printf(2, 0)
-print_all_levels(__maybe_unused enum libbpf_print_level level,
-		 const char *format, va_list args)
-{
-	return vfprintf(stderr, format, args);
-}
-
 int cmd_select(const struct cmd *cmds, int argc, char **argv,
 	       int (*help)(int argc, char **argv))
 {
@@ -228,6 +221,7 @@ static const struct cmd cmds[] = {
 	{ "feature",	do_feature },
 	{ "btf",	do_btf },
 	{ "gen",	do_gen },
+	{ "struct_ops",	do_struct_ops },
 	{ "version",	do_version },
 	{ 0 }
 };
diff --git a/tools/bpf/bpftool/main.h b/tools/bpf/bpftool/main.h
index 4e75b58d3989..86f14ce26fd7 100644
--- a/tools/bpf/bpftool/main.h
+++ b/tools/bpf/bpftool/main.h
@@ -14,6 +14,8 @@
 #include <linux/hashtable.h>
 #include <tools/libc_compat.h>
 
+#include <bpf/libbpf.h>
+
 #include "json_writer.h"
 
 #define ptr_to_u64(ptr)	((__u64)(unsigned long)(ptr))
@@ -76,6 +78,9 @@ static const char * const prog_type_name[] = {
 	[BPF_PROG_TYPE_CGROUP_SYSCTL]		= "cgroup_sysctl",
 	[BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE]	= "raw_tracepoint_writable",
 	[BPF_PROG_TYPE_CGROUP_SOCKOPT]		= "cgroup_sockopt",
+	[BPF_PROG_TYPE_TRACING]			= "tracing",
+	[BPF_PROG_TYPE_STRUCT_OPS]		= "struct_ops",
+	[BPF_PROG_TYPE_EXT]			= "ext",
 };
 
 extern const char * const map_type_name[];
@@ -143,7 +148,7 @@ char *get_fdinfo(int fd, const char *key);
 int open_obj_pinned(char *path, bool quiet);
 int open_obj_pinned_any(char *path, enum bpf_obj_type exp_type);
 int mount_bpffs_for_pin(const char *name);
-int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32));
+int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(int *, char ***));
 int do_pin_fd(int fd, const char *name);
 
 int do_prog(int argc, char **arg);
@@ -156,6 +161,7 @@ int do_tracelog(int argc, char **arg);
 int do_feature(int argc, char **argv);
 int do_btf(int argc, char **argv);
 int do_gen(int argc, char **argv);
+int do_struct_ops(int argc, char **argv);
 
 int parse_u32_arg(int *argc, char ***argv, __u32 *val, const char *what);
 int prog_parse_fd(int *argc, char ***argv);
@@ -200,6 +206,7 @@ struct btf_dumper {
 	const struct btf *btf;
 	json_writer_t *jw;
 	bool is_plain_text;
+	bool prog_id_as_func_ptr;
 };
 
 /* btf_dumper_type - print data along with type information
@@ -226,4 +233,7 @@ struct tcmsg;
 int do_xdp_dump(struct ifinfomsg *ifinfo, struct nlattr **tb);
 int do_filter_dump(struct tcmsg *ifinfo, struct nlattr **tb, const char *kind,
 		   const char *devname, int ifindex);
+
+int print_all_levels(__maybe_unused enum libbpf_print_level level,
+		     const char *format, va_list args);
 #endif
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index e6c85680b34d..693a632f6813 100644
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -1384,7 +1384,7 @@ static int do_pin(int argc, char **argv)
 {
 	int err;
 
-	err = do_pin_any(argc, argv, bpf_map_get_fd_by_id);
+	err = do_pin_any(argc, argv, map_parse_fd);
 	if (!err && json_output)
 		jsonw_null(json_wtr);
 	return err;
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index b352ab041160..f6a5974a7b0a 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -4,6 +4,7 @@
 #define _GNU_SOURCE
 #include <errno.h>
 #include <fcntl.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -11,10 +12,13 @@
 #include <time.h>
 #include <unistd.h>
 #include <net/if.h>
+#include <sys/ioctl.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/syscall.h>
 
 #include <linux/err.h>
+#include <linux/perf_event.h>
 #include <linux/sizes.h>
 
 #include <bpf/bpf.h>
@@ -809,7 +813,7 @@ static int do_pin(int argc, char **argv)
 {
 	int err;
 
-	err = do_pin_any(argc, argv, bpf_prog_get_fd_by_id);
+	err = do_pin_any(argc, argv, prog_parse_fd);
 	if (!err && json_output)
 		jsonw_null(json_wtr);
 	return err;
@@ -1243,6 +1247,25 @@ free_data_in:
 	return err;
 }
 
+static int
+get_prog_type_by_name(const char *name, enum bpf_prog_type *prog_type,
+		      enum bpf_attach_type *expected_attach_type)
+{
+	libbpf_print_fn_t print_backup;
+	int ret;
+
+	ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
+	if (!ret)
+		return ret;
+
+	/* libbpf_prog_type_by_name() failed, let's re-run with debug level */
+	print_backup = libbpf_set_print(print_all_levels);
+	ret = libbpf_prog_type_by_name(name, prog_type, expected_attach_type);
+	libbpf_set_print(print_backup);
+
+	return ret;
+}
+
 static int load_with_options(int argc, char **argv, bool first_prog_only)
 {
 	enum bpf_prog_type common_prog_type = BPF_PROG_TYPE_UNSPEC;
@@ -1292,8 +1315,8 @@ static int load_with_options(int argc, char **argv, bool first_prog_only)
 			strcat(type, *argv);
 			strcat(type, "/");
 
-			err = libbpf_prog_type_by_name(type, &common_prog_type,
-						       &expected_attach_type);
+			err = get_prog_type_by_name(type, &common_prog_type,
+						    &expected_attach_type);
 			free(type);
 			if (err < 0)
 				goto err_free_reuse_maps;
@@ -1392,8 +1415,8 @@ static int load_with_options(int argc, char **argv, bool first_prog_only)
 		if (prog_type == BPF_PROG_TYPE_UNSPEC) {
 			const char *sec_name = bpf_program__title(pos, false);
 
-			err = libbpf_prog_type_by_name(sec_name, &prog_type,
-						       &expected_attach_type);
+			err = get_prog_type_by_name(sec_name, &prog_type,
+						    &expected_attach_type);
 			if (err < 0)
 				goto err_close_obj;
 		}
@@ -1537,6 +1560,422 @@ static int do_loadall(int argc, char **argv)
 	return load_with_options(argc, argv, false);
 }
 
+#ifdef BPFTOOL_WITHOUT_SKELETONS
+
+static int do_profile(int argc, char **argv)
+{
+	p_err("bpftool prog profile command is not supported. Please build bpftool with clang >= 10.0.0");
+	return 0;
+}
+
+#else /* BPFTOOL_WITHOUT_SKELETONS */
+
+#include "profiler.skel.h"
+
+struct profile_metric {
+	const char *name;
+	struct bpf_perf_event_value val;
+	struct perf_event_attr attr;
+	bool selected;
+
+	/* calculate ratios like instructions per cycle */
+	const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */
+	const char *ratio_desc;
+	const float ratio_mul;
+} metrics[] = {
+	{
+		.name = "cycles",
+		.attr = {
+			.type = PERF_TYPE_HARDWARE,
+			.config = PERF_COUNT_HW_CPU_CYCLES,
+			.exclude_user = 1,
+		},
+	},
+	{
+		.name = "instructions",
+		.attr = {
+			.type = PERF_TYPE_HARDWARE,
+			.config = PERF_COUNT_HW_INSTRUCTIONS,
+			.exclude_user = 1,
+		},
+		.ratio_metric = 1,
+		.ratio_desc = "insns per cycle",
+		.ratio_mul = 1.0,
+	},
+	{
+		.name = "l1d_loads",
+		.attr = {
+			.type = PERF_TYPE_HW_CACHE,
+			.config =
+				PERF_COUNT_HW_CACHE_L1D |
+				(PERF_COUNT_HW_CACHE_OP_READ << 8) |
+				(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
+			.exclude_user = 1,
+		},
+	},
+	{
+		.name = "llc_misses",
+		.attr = {
+			.type = PERF_TYPE_HW_CACHE,
+			.config =
+				PERF_COUNT_HW_CACHE_LL |
+				(PERF_COUNT_HW_CACHE_OP_READ << 8) |
+				(PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
+			.exclude_user = 1
+		},
+		.ratio_metric = 2,
+		.ratio_desc = "LLC misses per million insns",
+		.ratio_mul = 1e6,
+	},
+};
+
+static __u64 profile_total_count;
+
+#define MAX_NUM_PROFILE_METRICS 4
+
+static int profile_parse_metrics(int argc, char **argv)
+{
+	unsigned int metric_cnt;
+	int selected_cnt = 0;
+	unsigned int i;
+
+	metric_cnt = sizeof(metrics) / sizeof(struct profile_metric);
+
+	while (argc > 0) {
+		for (i = 0; i < metric_cnt; i++) {
+			if (is_prefix(argv[0], metrics[i].name)) {
+				if (!metrics[i].selected)
+					selected_cnt++;
+				metrics[i].selected = true;
+				break;
+			}
+		}
+		if (i == metric_cnt) {
+			p_err("unknown metric %s", argv[0]);
+			return -1;
+		}
+		NEXT_ARG();
+	}
+	if (selected_cnt > MAX_NUM_PROFILE_METRICS) {
+		p_err("too many (%d) metrics, please specify no more than %d metrics at at time",
+		      selected_cnt, MAX_NUM_PROFILE_METRICS);
+		return -1;
+	}
+	return selected_cnt;
+}
+
+static void profile_read_values(struct profiler_bpf *obj)
+{
+	__u32 m, cpu, num_cpu = obj->rodata->num_cpu;
+	int reading_map_fd, count_map_fd;
+	__u64 counts[num_cpu];
+	__u32 key = 0;
+	int err;
+
+	reading_map_fd = bpf_map__fd(obj->maps.accum_readings);
+	count_map_fd = bpf_map__fd(obj->maps.counts);
+	if (reading_map_fd < 0 || count_map_fd < 0) {
+		p_err("failed to get fd for map");
+		return;
+	}
+
+	err = bpf_map_lookup_elem(count_map_fd, &key, counts);
+	if (err) {
+		p_err("failed to read count_map: %s", strerror(errno));
+		return;
+	}
+
+	profile_total_count = 0;
+	for (cpu = 0; cpu < num_cpu; cpu++)
+		profile_total_count += counts[cpu];
+
+	for (m = 0; m < ARRAY_SIZE(metrics); m++) {
+		struct bpf_perf_event_value values[num_cpu];
+
+		if (!metrics[m].selected)
+			continue;
+
+		err = bpf_map_lookup_elem(reading_map_fd, &key, values);
+		if (err) {
+			p_err("failed to read reading_map: %s",
+			      strerror(errno));
+			return;
+		}
+		for (cpu = 0; cpu < num_cpu; cpu++) {
+			metrics[m].val.counter += values[cpu].counter;
+			metrics[m].val.enabled += values[cpu].enabled;
+			metrics[m].val.running += values[cpu].running;
+		}
+		key++;
+	}
+}
+
+static void profile_print_readings_json(void)
+{
+	__u32 m;
+
+	jsonw_start_array(json_wtr);
+	for (m = 0; m < ARRAY_SIZE(metrics); m++) {
+		if (!metrics[m].selected)
+			continue;
+		jsonw_start_object(json_wtr);
+		jsonw_string_field(json_wtr, "metric", metrics[m].name);
+		jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count);
+		jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter);
+		jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled);
+		jsonw_lluint_field(json_wtr, "running", metrics[m].val.running);
+
+		jsonw_end_object(json_wtr);
+	}
+	jsonw_end_array(json_wtr);
+}
+
+static void profile_print_readings_plain(void)
+{
+	__u32 m;
+
+	printf("\n%18llu %-20s\n", profile_total_count, "run_cnt");
+	for (m = 0; m < ARRAY_SIZE(metrics); m++) {
+		struct bpf_perf_event_value *val = &metrics[m].val;
+		int r;
+
+		if (!metrics[m].selected)
+			continue;
+		printf("%18llu %-20s", val->counter, metrics[m].name);
+
+		r = metrics[m].ratio_metric - 1;
+		if (r >= 0 && metrics[r].selected &&
+		    metrics[r].val.counter > 0) {
+			printf("# %8.2f %-30s",
+			       val->counter * metrics[m].ratio_mul /
+			       metrics[r].val.counter,
+			       metrics[m].ratio_desc);
+		} else {
+			printf("%-41s", "");
+		}
+
+		if (val->enabled > val->running)
+			printf("(%4.2f%%)",
+			       val->running * 100.0 / val->enabled);
+		printf("\n");
+	}
+}
+
+static void profile_print_readings(void)
+{
+	if (json_output)
+		profile_print_readings_json();
+	else
+		profile_print_readings_plain();
+}
+
+static char *profile_target_name(int tgt_fd)
+{
+	struct bpf_prog_info_linear *info_linear;
+	struct bpf_func_info *func_info;
+	const struct btf_type *t;
+	char *name = NULL;
+	struct btf *btf;
+
+	info_linear = bpf_program__get_prog_info_linear(
+		tgt_fd, 1UL << BPF_PROG_INFO_FUNC_INFO);
+	if (IS_ERR_OR_NULL(info_linear)) {
+		p_err("failed to get info_linear for prog FD %d", tgt_fd);
+		return NULL;
+	}
+
+	if (info_linear->info.btf_id == 0 ||
+	    btf__get_from_id(info_linear->info.btf_id, &btf)) {
+		p_err("prog FD %d doesn't have valid btf", tgt_fd);
+		goto out;
+	}
+
+	func_info = (struct bpf_func_info *)(info_linear->info.func_info);
+	t = btf__type_by_id(btf, func_info[0].type_id);
+	if (!t) {
+		p_err("btf %d doesn't have type %d",
+		      info_linear->info.btf_id, func_info[0].type_id);
+		goto out;
+	}
+	name = strdup(btf__name_by_offset(btf, t->name_off));
+out:
+	free(info_linear);
+	return name;
+}
+
+static struct profiler_bpf *profile_obj;
+static int profile_tgt_fd = -1;
+static char *profile_tgt_name;
+static int *profile_perf_events;
+static int profile_perf_event_cnt;
+
+static void profile_close_perf_events(struct profiler_bpf *obj)
+{
+	int i;
+
+	for (i = profile_perf_event_cnt - 1; i >= 0; i--)
+		close(profile_perf_events[i]);
+
+	free(profile_perf_events);
+	profile_perf_event_cnt = 0;
+}
+
+static int profile_open_perf_events(struct profiler_bpf *obj)
+{
+	unsigned int cpu, m;
+	int map_fd, pmu_fd;
+
+	profile_perf_events = calloc(
+		sizeof(int), obj->rodata->num_cpu * obj->rodata->num_metric);
+	if (!profile_perf_events) {
+		p_err("failed to allocate memory for perf_event array: %s",
+		      strerror(errno));
+		return -1;
+	}
+	map_fd = bpf_map__fd(obj->maps.events);
+	if (map_fd < 0) {
+		p_err("failed to get fd for events map");
+		return -1;
+	}
+
+	for (m = 0; m < ARRAY_SIZE(metrics); m++) {
+		if (!metrics[m].selected)
+			continue;
+		for (cpu = 0; cpu < obj->rodata->num_cpu; cpu++) {
+			pmu_fd = syscall(__NR_perf_event_open, &metrics[m].attr,
+					 -1/*pid*/, cpu, -1/*group_fd*/, 0);
+			if (pmu_fd < 0 ||
+			    bpf_map_update_elem(map_fd, &profile_perf_event_cnt,
+						&pmu_fd, BPF_ANY) ||
+			    ioctl(pmu_fd, PERF_EVENT_IOC_ENABLE, 0)) {
+				p_err("failed to create event %s on cpu %d",
+				      metrics[m].name, cpu);
+				return -1;
+			}
+			profile_perf_events[profile_perf_event_cnt++] = pmu_fd;
+		}
+	}
+	return 0;
+}
+
+static void profile_print_and_cleanup(void)
+{
+	profile_close_perf_events(profile_obj);
+	profile_read_values(profile_obj);
+	profile_print_readings();
+	profiler_bpf__destroy(profile_obj);
+
+	close(profile_tgt_fd);
+	free(profile_tgt_name);
+}
+
+static void int_exit(int signo)
+{
+	profile_print_and_cleanup();
+	exit(0);
+}
+
+static int do_profile(int argc, char **argv)
+{
+	int num_metric, num_cpu, err = -1;
+	struct bpf_program *prog;
+	unsigned long duration;
+	char *endptr;
+
+	/* we at least need two args for the prog and one metric */
+	if (!REQ_ARGS(3))
+		return -EINVAL;
+
+	/* parse target fd */
+	profile_tgt_fd = prog_parse_fd(&argc, &argv);
+	if (profile_tgt_fd < 0) {
+		p_err("failed to parse fd");
+		return -1;
+	}
+
+	/* parse profiling optional duration */
+	if (argc > 2 && is_prefix(argv[0], "duration")) {
+		NEXT_ARG();
+		duration = strtoul(*argv, &endptr, 0);
+		if (*endptr)
+			usage();
+		NEXT_ARG();
+	} else {
+		duration = UINT_MAX;
+	}
+
+	num_metric = profile_parse_metrics(argc, argv);
+	if (num_metric <= 0)
+		goto out;
+
+	num_cpu = libbpf_num_possible_cpus();
+	if (num_cpu <= 0) {
+		p_err("failed to identify number of CPUs");
+		goto out;
+	}
+
+	profile_obj = profiler_bpf__open();
+	if (!profile_obj) {
+		p_err("failed to open and/or load BPF object");
+		goto out;
+	}
+
+	profile_obj->rodata->num_cpu = num_cpu;
+	profile_obj->rodata->num_metric = num_metric;
+
+	/* adjust map sizes */
+	bpf_map__resize(profile_obj->maps.events, num_metric * num_cpu);
+	bpf_map__resize(profile_obj->maps.fentry_readings, num_metric);
+	bpf_map__resize(profile_obj->maps.accum_readings, num_metric);
+	bpf_map__resize(profile_obj->maps.counts, 1);
+
+	/* change target name */
+	profile_tgt_name = profile_target_name(profile_tgt_fd);
+	if (!profile_tgt_name)
+		goto out;
+
+	bpf_object__for_each_program(prog, profile_obj->obj) {
+		err = bpf_program__set_attach_target(prog, profile_tgt_fd,
+						     profile_tgt_name);
+		if (err) {
+			p_err("failed to set attach target\n");
+			goto out;
+		}
+	}
+
+	set_max_rlimit();
+	err = profiler_bpf__load(profile_obj);
+	if (err) {
+		p_err("failed to load profile_obj");
+		goto out;
+	}
+
+	err = profile_open_perf_events(profile_obj);
+	if (err)
+		goto out;
+
+	err = profiler_bpf__attach(profile_obj);
+	if (err) {
+		p_err("failed to attach profile_obj");
+		goto out;
+	}
+	signal(SIGINT, int_exit);
+
+	sleep(duration);
+	profile_print_and_cleanup();
+	return 0;
+
+out:
+	profile_close_perf_events(profile_obj);
+	if (profile_obj)
+		profiler_bpf__destroy(profile_obj);
+	close(profile_tgt_fd);
+	free(profile_tgt_name);
+	return err;
+}
+
+#endif /* BPFTOOL_WITHOUT_SKELETONS */
+
 static int do_help(int argc, char **argv)
 {
 	if (json_output) {
@@ -1560,6 +1999,7 @@ static int do_help(int argc, char **argv)
 		"                         [data_out FILE [data_size_out L]] \\\n"
 		"                         [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n"
 		"                         [repeat N]\n"
+		"       %s %s profile PROG [duration DURATION] METRICs\n"
 		"       %s %s tracelog\n"
 		"       %s %s help\n"
 		"\n"
@@ -1573,16 +2013,17 @@ static int do_help(int argc, char **argv)
 		"                 cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
 		"                 cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
 		"                 cgroup/sendmsg4 | cgroup/sendmsg6 | cgroup/recvmsg4 |\n"
-		"                 cgroup/recvmsg6 | cgroup/getsockopt |\n"
-		"                 cgroup/setsockopt }\n"
+		"                 cgroup/recvmsg6 | cgroup/getsockopt | cgroup/setsockopt |\n"
+		"                 struct_ops | fentry | fexit | freplace }\n"
 		"       ATTACH_TYPE := { msg_verdict | stream_verdict | stream_parser |\n"
 		"                        flow_dissector }\n"
+		"       METRIC := { cycles | instructions | l1d_loads | llc_misses }\n"
 		"       " HELP_SPEC_OPTIONS "\n"
 		"",
 		bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
 		bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
 		bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
-		bin_name, argv[-2]);
+		bin_name, argv[-2], bin_name, argv[-2]);
 
 	return 0;
 }
@@ -1599,6 +2040,7 @@ static const struct cmd cmds[] = {
 	{ "detach",	do_detach },
 	{ "tracelog",	do_tracelog },
 	{ "run",	do_run },
+	{ "profile",	do_profile },
 	{ 0 }
 };
 
diff --git a/tools/bpf/bpftool/skeleton/profiler.bpf.c b/tools/bpf/bpftool/skeleton/profiler.bpf.c
new file mode 100644
index 000000000000..20034c12f7c5
--- /dev/null
+++ b/tools/bpf/bpftool/skeleton/profiler.bpf.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2020 Facebook
+#include "profiler.h"
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+/* map of perf event fds, num_cpu * num_metric entries */
+struct {
+	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
+	__uint(key_size, sizeof(u32));
+	__uint(value_size, sizeof(int));
+} events SEC(".maps");
+
+/* readings at fentry */
+struct {
+	__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+	__uint(key_size, sizeof(u32));
+	__uint(value_size, sizeof(struct bpf_perf_event_value));
+} fentry_readings SEC(".maps");
+
+/* accumulated readings */
+struct {
+	__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+	__uint(key_size, sizeof(u32));
+	__uint(value_size, sizeof(struct bpf_perf_event_value));
+} accum_readings SEC(".maps");
+
+/* sample counts, one per cpu */
+struct {
+	__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+	__uint(key_size, sizeof(u32));
+	__uint(value_size, sizeof(u64));
+} counts SEC(".maps");
+
+const volatile __u32 num_cpu = 1;
+const volatile __u32 num_metric = 1;
+#define MAX_NUM_MATRICS 4
+
+SEC("fentry/XXX")
+int BPF_PROG(fentry_XXX)
+{
+	struct bpf_perf_event_value *ptrs[MAX_NUM_MATRICS];
+	u32 key = bpf_get_smp_processor_id();
+	u32 i;
+
+	/* look up before reading, to reduce error */
+	for (i = 0; i < num_metric && i < MAX_NUM_MATRICS; i++) {
+		u32 flag = i;
+
+		ptrs[i] = bpf_map_lookup_elem(&fentry_readings, &flag);
+		if (!ptrs[i])
+			return 0;
+	}
+
+	for (i = 0; i < num_metric && i < MAX_NUM_MATRICS; i++) {
+		struct bpf_perf_event_value reading;
+		int err;
+
+		err = bpf_perf_event_read_value(&events, key, &reading,
+						sizeof(reading));
+		if (err)
+			return 0;
+		*(ptrs[i]) = reading;
+		key += num_cpu;
+	}
+
+	return 0;
+}
+
+static inline void
+fexit_update_maps(u32 id, struct bpf_perf_event_value *after)
+{
+	struct bpf_perf_event_value *before, diff, *accum;
+
+	before = bpf_map_lookup_elem(&fentry_readings, &id);
+	/* only account samples with a valid fentry_reading */
+	if (before && before->counter) {
+		struct bpf_perf_event_value *accum;
+
+		diff.counter = after->counter - before->counter;
+		diff.enabled = after->enabled - before->enabled;
+		diff.running = after->running - before->running;
+
+		accum = bpf_map_lookup_elem(&accum_readings, &id);
+		if (accum) {
+			accum->counter += diff.counter;
+			accum->enabled += diff.enabled;
+			accum->running += diff.running;
+		}
+	}
+}
+
+SEC("fexit/XXX")
+int BPF_PROG(fexit_XXX)
+{
+	struct bpf_perf_event_value readings[MAX_NUM_MATRICS];
+	u32 cpu = bpf_get_smp_processor_id();
+	u32 i, one = 1, zero = 0;
+	int err;
+	u64 *count;
+
+	/* read all events before updating the maps, to reduce error */
+	for (i = 0; i < num_metric && i < MAX_NUM_MATRICS; i++) {
+		err = bpf_perf_event_read_value(&events, cpu + i * num_cpu,
+						readings + i, sizeof(*readings));
+		if (err)
+			return 0;
+	}
+	count = bpf_map_lookup_elem(&counts, &zero);
+	if (count) {
+		*count += 1;
+		for (i = 0; i < num_metric && i < MAX_NUM_MATRICS; i++)
+			fexit_update_maps(i, &readings[i]);
+	}
+	return 0;
+}
+
+char LICENSE[] SEC("license") = "GPL";
diff --git a/tools/bpf/bpftool/skeleton/profiler.h b/tools/bpf/bpftool/skeleton/profiler.h
new file mode 100644
index 000000000000..1f767e9510f7
--- /dev/null
+++ b/tools/bpf/bpftool/skeleton/profiler.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
+#ifndef __PROFILER_H
+#define __PROFILER_H
+
+/* useful typedefs from vmlinux.h */
+
+typedef signed char __s8;
+typedef unsigned char __u8;
+typedef short int __s16;
+typedef short unsigned int __u16;
+typedef int __s32;
+typedef unsigned int __u32;
+typedef long long int __s64;
+typedef long long unsigned int __u64;
+
+typedef __s8 s8;
+typedef __u8 u8;
+typedef __s16 s16;
+typedef __u16 u16;
+typedef __s32 s32;
+typedef __u32 u32;
+typedef __s64 s64;
+typedef __u64 u64;
+
+enum {
+	false = 0,
+	true = 1,
+};
+
+#ifdef __CHECKER__
+#define __bitwise__ __attribute__((bitwise))
+#else
+#define __bitwise__
+#endif
+
+typedef __u16 __bitwise__ __le16;
+typedef __u16 __bitwise__ __be16;
+typedef __u32 __bitwise__ __le32;
+typedef __u32 __bitwise__ __be32;
+typedef __u64 __bitwise__ __le64;
+typedef __u64 __bitwise__ __be64;
+
+typedef __u16 __bitwise__ __sum16;
+typedef __u32 __bitwise__ __wsum;
+
+#endif /* __PROFILER_H */
diff --git a/tools/bpf/bpftool/struct_ops.c b/tools/bpf/bpftool/struct_ops.c
new file mode 100644
index 000000000000..2a7befbd11ad
--- /dev/null
+++ b/tools/bpf/bpftool/struct_ops.c
@@ -0,0 +1,596 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/* Copyright (C) 2020 Facebook */
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <linux/err.h>
+
+#include <bpf/bpf.h>
+#include <bpf/btf.h>
+#include <bpf/libbpf.h>
+
+#include "json_writer.h"
+#include "main.h"
+
+#define STRUCT_OPS_VALUE_PREFIX "bpf_struct_ops_"
+
+static const struct btf_type *map_info_type;
+static __u32 map_info_alloc_len;
+static struct btf *btf_vmlinux;
+static __s32 map_info_type_id;
+
+struct res {
+	unsigned int nr_maps;
+	unsigned int nr_errs;
+};
+
+static const struct btf *get_btf_vmlinux(void)
+{
+	if (btf_vmlinux)
+		return btf_vmlinux;
+
+	btf_vmlinux = libbpf_find_kernel_btf();
+	if (IS_ERR(btf_vmlinux))
+		p_err("struct_ops requires kernel CONFIG_DEBUG_INFO_BTF=y");
+
+	return btf_vmlinux;
+}
+
+static const char *get_kern_struct_ops_name(const struct bpf_map_info *info)
+{
+	const struct btf *kern_btf;
+	const struct btf_type *t;
+	const char *st_ops_name;
+
+	kern_btf = get_btf_vmlinux();
+	if (IS_ERR(kern_btf))
+		return "<btf_vmlinux_not_found>";
+
+	t = btf__type_by_id(kern_btf, info->btf_vmlinux_value_type_id);
+	st_ops_name = btf__name_by_offset(kern_btf, t->name_off);
+	st_ops_name += strlen(STRUCT_OPS_VALUE_PREFIX);
+
+	return st_ops_name;
+}
+
+static __s32 get_map_info_type_id(void)
+{
+	const struct btf *kern_btf;
+
+	if (map_info_type_id)
+		return map_info_type_id;
+
+	kern_btf = get_btf_vmlinux();
+	if (IS_ERR(kern_btf)) {
+		map_info_type_id = PTR_ERR(kern_btf);
+		return map_info_type_id;
+	}
+
+	map_info_type_id = btf__find_by_name_kind(kern_btf, "bpf_map_info",
+						  BTF_KIND_STRUCT);
+	if (map_info_type_id < 0) {
+		p_err("can't find bpf_map_info from btf_vmlinux");
+		return map_info_type_id;
+	}
+	map_info_type = btf__type_by_id(kern_btf, map_info_type_id);
+
+	/* Ensure map_info_alloc() has at least what the bpftool needs */
+	map_info_alloc_len = map_info_type->size;
+	if (map_info_alloc_len < sizeof(struct bpf_map_info))
+		map_info_alloc_len = sizeof(struct bpf_map_info);
+
+	return map_info_type_id;
+}
+
+/* If the subcmd needs to print out the bpf_map_info,
+ * it should always call map_info_alloc to allocate
+ * a bpf_map_info object instead of allocating it
+ * on the stack.
+ *
+ * map_info_alloc() will take the running kernel's btf
+ * into account.  i.e. it will consider the
+ * sizeof(struct bpf_map_info) of the running kernel.
+ *
+ * It will enable the "struct_ops" cmd to print the latest
+ * "struct bpf_map_info".
+ *
+ * [ Recall that "struct_ops" requires the kernel's btf to
+ *   be available ]
+ */
+static struct bpf_map_info *map_info_alloc(__u32 *alloc_len)
+{
+	struct bpf_map_info *info;
+
+	if (get_map_info_type_id() < 0)
+		return NULL;
+
+	info = calloc(1, map_info_alloc_len);
+	if (!info)
+		p_err("mem alloc failed");
+	else
+		*alloc_len = map_info_alloc_len;
+
+	return info;
+}
+
+/* It iterates all struct_ops maps of the system.
+ * It returns the fd in "*res_fd" and map_info in "*info".
+ * In the very first iteration, info->id should be 0.
+ * An optional map "*name" filter can be specified.
+ * The filter can be made more flexible in the future.
+ * e.g. filter by kernel-struct-ops-name, regex-name, glob-name, ...etc.
+ *
+ * Return value:
+ *     1: A struct_ops map found.  It is returned in "*res_fd" and "*info".
+ *	  The caller can continue to call get_next in the future.
+ *     0: No struct_ops map is returned.
+ *        All struct_ops map has been found.
+ *    -1: Error and the caller should abort the iteration.
+ */
+static int get_next_struct_ops_map(const char *name, int *res_fd,
+				   struct bpf_map_info *info, __u32 info_len)
+{
+	__u32 id = info->id;
+	int err, fd;
+
+	while (true) {
+		err = bpf_map_get_next_id(id, &id);
+		if (err) {
+			if (errno == ENOENT)
+				return 0;
+			p_err("can't get next map: %s", strerror(errno));
+			return -1;
+		}
+
+		fd = bpf_map_get_fd_by_id(id);
+		if (fd < 0) {
+			if (errno == ENOENT)
+				continue;
+			p_err("can't get map by id (%u): %s",
+			      id, strerror(errno));
+			return -1;
+		}
+
+		err = bpf_obj_get_info_by_fd(fd, info, &info_len);
+		if (err) {
+			p_err("can't get map info: %s", strerror(errno));
+			close(fd);
+			return -1;
+		}
+
+		if (info->type == BPF_MAP_TYPE_STRUCT_OPS &&
+		    (!name || !strcmp(name, info->name))) {
+			*res_fd = fd;
+			return 1;
+		}
+		close(fd);
+	}
+}
+
+static int cmd_retval(const struct res *res, bool must_have_one_map)
+{
+	if (res->nr_errs || (!res->nr_maps && must_have_one_map))
+		return -1;
+
+	return 0;
+}
+
+/* "data" is the work_func private storage */
+typedef int (*work_func)(int fd, const struct bpf_map_info *info, void *data,
+			 struct json_writer *wtr);
+
+/* Find all struct_ops map in the system.
+ * Filter out by "name" (if specified).
+ * Then call "func(fd, info, data, wtr)" on each struct_ops map found.
+ */
+static struct res do_search(const char *name, work_func func, void *data,
+			    struct json_writer *wtr)
+{
+	struct bpf_map_info *info;
+	struct res res = {};
+	__u32 info_len;
+	int fd, err;
+
+	info = map_info_alloc(&info_len);
+	if (!info) {
+		res.nr_errs++;
+		return res;
+	}
+
+	if (wtr)
+		jsonw_start_array(wtr);
+	while ((err = get_next_struct_ops_map(name, &fd, info, info_len)) == 1) {
+		res.nr_maps++;
+		err = func(fd, info, data, wtr);
+		if (err)
+			res.nr_errs++;
+		close(fd);
+	}
+	if (wtr)
+		jsonw_end_array(wtr);
+
+	if (err)
+		res.nr_errs++;
+
+	if (!wtr && name && !res.nr_errs && !res.nr_maps)
+		/* It is not printing empty [].
+		 * Thus, needs to specifically say nothing found
+		 * for "name" here.
+		 */
+		p_err("no struct_ops found for %s", name);
+	else if (!wtr && json_output && !res.nr_errs)
+		/* The "func()" above is not writing any json (i.e. !wtr
+		 * test here).
+		 *
+		 * However, "-j" is enabled and there is no errs here,
+		 * so call json_null() as the current convention of
+		 * other cmds.
+		 */
+		jsonw_null(json_wtr);
+
+	free(info);
+	return res;
+}
+
+static struct res do_one_id(const char *id_str, work_func func, void *data,
+			    struct json_writer *wtr)
+{
+	struct bpf_map_info *info;
+	struct res res = {};
+	unsigned long id;
+	__u32 info_len;
+	char *endptr;
+	int fd;
+
+	id = strtoul(id_str, &endptr, 0);
+	if (*endptr || !id || id > UINT32_MAX) {
+		p_err("invalid id %s", id_str);
+		res.nr_errs++;
+		return res;
+	}
+
+	fd = bpf_map_get_fd_by_id(id);
+	if (fd == -1) {
+		p_err("can't get map by id (%lu): %s", id, strerror(errno));
+		res.nr_errs++;
+		return res;
+	}
+
+	info = map_info_alloc(&info_len);
+	if (!info) {
+		res.nr_errs++;
+		goto done;
+	}
+
+	if (bpf_obj_get_info_by_fd(fd, info, &info_len)) {
+		p_err("can't get map info: %s", strerror(errno));
+		res.nr_errs++;
+		goto done;
+	}
+
+	if (info->type != BPF_MAP_TYPE_STRUCT_OPS) {
+		p_err("%s id %u is not a struct_ops map", info->name, info->id);
+		res.nr_errs++;
+		goto done;
+	}
+
+	res.nr_maps++;
+
+	if (func(fd, info, data, wtr))
+		res.nr_errs++;
+	else if (!wtr && json_output)
+		/* The "func()" above is not writing any json (i.e. !wtr
+		 * test here).
+		 *
+		 * However, "-j" is enabled and there is no errs here,
+		 * so call json_null() as the current convention of
+		 * other cmds.
+		 */
+		jsonw_null(json_wtr);
+
+done:
+	free(info);
+	close(fd);
+
+	return res;
+}
+
+static struct res do_work_on_struct_ops(const char *search_type,
+					const char *search_term,
+					work_func func, void *data,
+					struct json_writer *wtr)
+{
+	if (search_type) {
+		if (is_prefix(search_type, "id"))
+			return do_one_id(search_term, func, data, wtr);
+		else if (!is_prefix(search_type, "name"))
+			usage();
+	}
+
+	return do_search(search_term, func, data, wtr);
+}
+
+static int __do_show(int fd, const struct bpf_map_info *info, void *data,
+		     struct json_writer *wtr)
+{
+	if (wtr) {
+		jsonw_start_object(wtr);
+		jsonw_uint_field(wtr, "id", info->id);
+		jsonw_string_field(wtr, "name", info->name);
+		jsonw_string_field(wtr, "kernel_struct_ops",
+				   get_kern_struct_ops_name(info));
+		jsonw_end_object(wtr);
+	} else {
+		printf("%u: %-15s %-32s\n", info->id, info->name,
+		       get_kern_struct_ops_name(info));
+	}
+
+	return 0;
+}
+
+static int do_show(int argc, char **argv)
+{
+	const char *search_type = NULL, *search_term = NULL;
+	struct res res;
+
+	if (argc && argc != 2)
+		usage();
+
+	if (argc == 2) {
+		search_type = GET_ARG();
+		search_term = GET_ARG();
+	}
+
+	res = do_work_on_struct_ops(search_type, search_term, __do_show,
+				    NULL, json_wtr);
+
+	return cmd_retval(&res, !!search_term);
+}
+
+static int __do_dump(int fd, const struct bpf_map_info *info, void *data,
+		     struct json_writer *wtr)
+{
+	struct btf_dumper *d = (struct btf_dumper *)data;
+	const struct btf_type *struct_ops_type;
+	const struct btf *kern_btf = d->btf;
+	const char *struct_ops_name;
+	int zero = 0;
+	void *value;
+
+	/* note: d->jw == wtr */
+
+	kern_btf = d->btf;
+
+	/* The kernel supporting BPF_MAP_TYPE_STRUCT_OPS must have
+	 * btf_vmlinux_value_type_id.
+	 */
+	struct_ops_type = btf__type_by_id(kern_btf,
+					  info->btf_vmlinux_value_type_id);
+	struct_ops_name = btf__name_by_offset(kern_btf,
+					      struct_ops_type->name_off);
+	value = calloc(1, info->value_size);
+	if (!value) {
+		p_err("mem alloc failed");
+		return -1;
+	}
+
+	if (bpf_map_lookup_elem(fd, &zero, value)) {
+		p_err("can't lookup struct_ops map %s id %u",
+		      info->name, info->id);
+		free(value);
+		return -1;
+	}
+
+	jsonw_start_object(wtr);
+	jsonw_name(wtr, "bpf_map_info");
+	btf_dumper_type(d, map_info_type_id, (void *)info);
+	jsonw_end_object(wtr);
+
+	jsonw_start_object(wtr);
+	jsonw_name(wtr, struct_ops_name);
+	btf_dumper_type(d, info->btf_vmlinux_value_type_id, value);
+	jsonw_end_object(wtr);
+
+	free(value);
+
+	return 0;
+}
+
+static int do_dump(int argc, char **argv)
+{
+	const char *search_type = NULL, *search_term = NULL;
+	json_writer_t *wtr = json_wtr;
+	const struct btf *kern_btf;
+	struct btf_dumper d = {};
+	struct res res;
+
+	if (argc && argc != 2)
+		usage();
+
+	if (argc == 2) {
+		search_type = GET_ARG();
+		search_term = GET_ARG();
+	}
+
+	kern_btf = get_btf_vmlinux();
+	if (IS_ERR(kern_btf))
+		return -1;
+
+	if (!json_output) {
+		wtr = jsonw_new(stdout);
+		if (!wtr) {
+			p_err("can't create json writer");
+			return -1;
+		}
+		jsonw_pretty(wtr, true);
+	}
+
+	d.btf = kern_btf;
+	d.jw = wtr;
+	d.is_plain_text = !json_output;
+	d.prog_id_as_func_ptr = true;
+
+	res = do_work_on_struct_ops(search_type, search_term, __do_dump, &d,
+				    wtr);
+
+	if (!json_output)
+		jsonw_destroy(&wtr);
+
+	return cmd_retval(&res, !!search_term);
+}
+
+static int __do_unregister(int fd, const struct bpf_map_info *info, void *data,
+			   struct json_writer *wtr)
+{
+	int zero = 0;
+
+	if (bpf_map_delete_elem(fd, &zero)) {
+		p_err("can't unload %s %s id %u: %s",
+		      get_kern_struct_ops_name(info), info->name,
+		      info->id, strerror(errno));
+		return -1;
+	}
+
+	p_info("Unregistered %s %s id %u",
+	       get_kern_struct_ops_name(info), info->name,
+	       info->id);
+
+	return 0;
+}
+
+static int do_unregister(int argc, char **argv)
+{
+	const char *search_type, *search_term;
+	struct res res;
+
+	if (argc != 2)
+		usage();
+
+	search_type = GET_ARG();
+	search_term = GET_ARG();
+
+	res = do_work_on_struct_ops(search_type, search_term,
+				    __do_unregister, NULL, NULL);
+
+	return cmd_retval(&res, true);
+}
+
+static int do_register(int argc, char **argv)
+{
+	const struct bpf_map_def *def;
+	struct bpf_map_info info = {};
+	__u32 info_len = sizeof(info);
+	int nr_errs = 0, nr_maps = 0;
+	struct bpf_object *obj;
+	struct bpf_link *link;
+	struct bpf_map *map;
+	const char *file;
+
+	if (argc != 1)
+		usage();
+
+	file = GET_ARG();
+
+	obj = bpf_object__open(file);
+	if (IS_ERR_OR_NULL(obj))
+		return -1;
+
+	set_max_rlimit();
+
+	if (bpf_object__load(obj)) {
+		bpf_object__close(obj);
+		return -1;
+	}
+
+	bpf_object__for_each_map(map, obj) {
+		def = bpf_map__def(map);
+		if (def->type != BPF_MAP_TYPE_STRUCT_OPS)
+			continue;
+
+		link = bpf_map__attach_struct_ops(map);
+		if (IS_ERR(link)) {
+			p_err("can't register struct_ops %s: %s",
+			      bpf_map__name(map),
+			      strerror(-PTR_ERR(link)));
+			nr_errs++;
+			continue;
+		}
+		nr_maps++;
+
+		bpf_link__disconnect(link);
+		bpf_link__destroy(link);
+
+		if (!bpf_obj_get_info_by_fd(bpf_map__fd(map), &info,
+					    &info_len))
+			p_info("Registered %s %s id %u",
+			       get_kern_struct_ops_name(&info),
+			       bpf_map__name(map),
+			       info.id);
+		else
+			/* Not p_err.  The struct_ops was attached
+			 * successfully.
+			 */
+			p_info("Registered %s but can't find id: %s",
+			       bpf_map__name(map), strerror(errno));
+	}
+
+	bpf_object__close(obj);
+
+	if (nr_errs)
+		return -1;
+
+	if (!nr_maps) {
+		p_err("no struct_ops found in %s", file);
+		return -1;
+	}
+
+	if (json_output)
+		jsonw_null(json_wtr);
+
+	return 0;
+}
+
+static int do_help(int argc, char **argv)
+{
+	if (json_output) {
+		jsonw_null(json_wtr);
+		return 0;
+	}
+
+	fprintf(stderr,
+		"Usage: %s %s { show | list } [STRUCT_OPS_MAP]\n"
+		"       %s %s dump [STRUCT_OPS_MAP]\n"
+		"       %s %s register OBJ\n"
+		"       %s %s unregister STRUCT_OPS_MAP\n"
+		"       %s %s help\n"
+		"\n"
+		"       OPTIONS := { {-j|--json} [{-p|--pretty}] }\n"
+		"       STRUCT_OPS_MAP := [ id STRUCT_OPS_MAP_ID | name STRUCT_OPS_MAP_NAME ]\n",
+		bin_name, argv[-2], bin_name, argv[-2],
+		bin_name, argv[-2], bin_name, argv[-2],
+		bin_name, argv[-2]);
+
+	return 0;
+}
+
+static const struct cmd cmds[] = {
+	{ "show",	do_show },
+	{ "list",	do_show },
+	{ "register",	do_register },
+	{ "unregister",	do_unregister },
+	{ "dump",	do_dump },
+	{ "help",	do_help },
+	{ 0 }
+};
+
+int do_struct_ops(int argc, char **argv)
+{
+	int err;
+
+	err = cmd_select(cmds, argc, argv, do_help);
+
+	btf__free(btf_vmlinux);
+	return err;
+}
diff --git a/tools/bpf/runqslower/.gitignore b/tools/bpf/runqslower/.gitignore
index 90a456a2a72f..ffdb70230c8b 100644
--- a/tools/bpf/runqslower/.gitignore
+++ b/tools/bpf/runqslower/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /.output
diff --git a/tools/bpf/runqslower/runqslower.bpf.c b/tools/bpf/runqslower/runqslower.bpf.c
index 48a39f72fadf..1f18a409f044 100644
--- a/tools/bpf/runqslower/runqslower.bpf.c
+++ b/tools/bpf/runqslower/runqslower.bpf.c
@@ -5,9 +5,7 @@
 #include "runqslower.h"
 
 #define TASK_RUNNING 0
-
-#define BPF_F_INDEX_MASK		0xffffffffULL
-#define BPF_F_CURRENT_CPU		BPF_F_INDEX_MASK
+#define BPF_F_CURRENT_CPU 0xffffffffULL
 
 const volatile __u64 min_us = 0;
 const volatile pid_t targ_pid = 0;