perf parse-events: Remove BPF event support

New features like the BPF --filter support in perf record have made the BPF event functionality somewhat redundant. As shown by commit fcb027c1a4f6 ("perf tools: Revert enable indices setting syntax for BPF map") and commit 14e4b9f428 ("perf trace: Raw augmented syscalls fix libbpf 1.0+ compatibility") the BPF event support hasn't been well maintained and it adds considerable complexity in areas like event parsing, not least as '/' is a separator for event modifiers as well as in paths. This patch removes support in the event parser for BPF events and then the associated functions are removed. This leads to the removal of whole source files like bpf-loader.c. Removing support means that augmented syscalls in perf trace is broken, this will be fixed in a later commit adding support using BPF skeletons. The removal of BPF events causes an unused label warning from flex generated code, so update build to ignore it: ``` util/parse-events-flex.c:2704:1: error: label ‘find_rule’ defined but not used [-Werror=unused-label] 2704 | find_rule: /* we branch to this label when backing up */ ``` Committer notes: Extracted from a larger patch that was also removing the support for linking with libllvm and libclang, that were an alternative to using an external clang execution to compile the .c event source code into BPF bytecode. Testing it: # perf trace -e /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c event syntax error: '/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c' \___ Bad event or PMU Unabled to find PMU or event on a PMU of 'home' Initial error: event syntax error: '/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c' \___ Cannot find PMU `home'. Missing kernel support? Run 'perf list' for a list of valid events Usage: perf trace [<options>] [<command>] or: perf trace [<options>] -- <command> [<options>] or: perf trace record [<options>] [<command>] or: perf trace record [<options>] -- <command> [<options>] -e, --event <event> event/syscall selector. use 'perf list' to list available events # Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Carsten Haitzler <carsten.haitzler@arm.com> Cc: Eduard Zingerman <eddyz87@gmail.com> Cc: Fangrui Song <maskray@google.com> Cc: He Kuang <hekuang@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Cc: Tom Rix <trix@redhat.com> Cc: Wang Nan <wangnan0@huawei.com> Cc: Wang ShaoBo <bobo.shaobowang@huawei.com> Cc: Yang Jihong <yangjihong1@huawei.com> Cc: Yonghong Song <yhs@fb.com> Cc: YueHaibing <yuehaibing@huawei.com> Cc: bpf@vger.kernel.org Cc: llvm@lists.linux.dev Link: https://lore.kernel.org/r/20230810184853.2860737-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-03-06 15:25:10 -08:00 · 2023-08-11 15:26:11 -03:00
parent 56b11a2126
commit 3d6dfae889
27 changed files with 3 additions and 4381 deletions
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -125,9 +125,6 @@ Given a $HOME/.perfconfig like this:
 		group = true
 		skip-empty = true

-	[llvm]
-		dump-obj = true
-		clang-opt = -g

 You can hide source code of annotate feature setting the config to false with

@@ -657,36 +654,6 @@ ftrace.*::
 		-F option is not specified. Possible values are 'function' and
 		'function_graph'.

-llvm.*::
-	llvm.clang-path::
-		Path to clang. If omit, search it from $PATH.
-
-	llvm.clang-bpf-cmd-template::
-		Cmdline template. Below lines show its default value. Environment
-		variable is used to pass options.
-		"$CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS "\
-		"-DLINUX_VERSION_CODE=$LINUX_VERSION_CODE "	\
-		"$CLANG_OPTIONS $PERF_BPF_INC_OPTIONS $KERNEL_INC_OPTIONS " \
-		"-Wno-unused-value -Wno-pointer-sign "		\
-		"-working-directory $WORKING_DIR "		\
-		"-c \"$CLANG_SOURCE\" --target=bpf $CLANG_EMIT_LLVM -O2 -o - $LLVM_OPTIONS_PIPE"
-
-	llvm.clang-opt::
-		Options passed to clang.
-
-	llvm.kbuild-dir::
-		kbuild directory. If not set, use /lib/modules/`uname -r`/build.
-		If set to "" deliberately, skip kernel header auto-detector.
-
-	llvm.kbuild-opts::
-		Options passed to 'make' when detecting kernel header options.
-
-	llvm.dump-obj::
-		Enable perf dump BPF object files compiled by LLVM.
-
-	llvm.opts::
-		Options passed to llc.
-
 samples.*::

 	samples.context::
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -99,20 +99,6 @@ OPTIONS
          If you want to profile write accesses in [0x1000~1008), just set
          'mem:0x1000/8:w'.

-        - a BPF source file (ending in .c) or a precompiled object file (ending
-          in .o) selects one or more BPF events.
-          The BPF program can attach to various perf events based on the ELF section
-          names.
-
-          When processing a '.c' file, perf searches an installed LLVM to compile it
-          into an object file first. Optional clang options can be passed via the
-          '--clang-opt' command line option, e.g.:
-
-            perf record --clang-opt "-DLINUX_VERSION_CODE=0x50000" \
-                        -e tests/bpf-script-example.c
-
-          Note: '--clang-opt' must be placed before '--event/-e'.
-
 	- a group of events surrounded by a pair of brace ("{event1,event2,...}").
 	  Each event is separated by commas and the group should be quoted to
 	  prevent the shell interpretation.  You also need to use --group on
@@ -547,14 +533,6 @@ PERF_RECORD_SWITCH_CPU_WIDE. In some cases (e.g. Intel PT, CoreSight or Arm SPE)
 switch events will be enabled automatically, which can be suppressed by
 by the option --no-switch-events.

--clang-path=PATH::
-Path to clang binary to use for compiling BPF scriptlets.
-(enabled when BPF support is on)
-
--clang-opt=OPTIONS::
-Options passed to clang when compiling BPF scriptlets.
-(enabled when BPF support is on)
-
 --vmlinux=PATH::
 Specify vmlinux path which has debuginfo.
 (enabled when BPF prologue is on)
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -589,18 +589,6 @@ ifndef NO_LIBELF
 	LIBBPF_STATIC := 1
      endif
    endif
-
-    ifndef NO_DWARF
-      ifdef PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET
-        CFLAGS += -DHAVE_BPF_PROLOGUE
-        $(call detected,CONFIG_BPF_PROLOGUE)
-      else
-        msg := $(warning BPF prologue is not supported by architecture $(SRCARCH), missing regs_query_register_offset());
-      endif
-    else
-      msg := $(warning DWARF support is off, BPF prologue is disabled);
-    endif
-
  endif # NO_LIBBPF
 endif # NO_LIBELF

--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -37,8 +37,6 @@
 #include "util/parse-branch-options.h"
 #include "util/parse-regs-options.h"
 #include "util/perf_api_probe.h"
-#include "util/llvm-utils.h"
-#include "util/bpf-loader.h"
 #include "util/trigger.h"
 #include "util/perf-hooks.h"
 #include "util/cpu-set-sched.h"
@@ -2465,16 +2463,6 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 		}
 	}

-	err = bpf__apply_obj_config();
-	if (err) {
-		char errbuf[BUFSIZ];
-
-		bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
-		pr_err("ERROR: Apply config to BPF failed: %s\n",
-			 errbuf);
-		goto out_free_threads;
-	}
-
 	/*
 	 * Normally perf_session__new would do this, but it doesn't have the
 	 * evlist.
@@ -3486,10 +3474,6 @@ static struct option __record_options[] = {
 		    "collect kernel callchains"),
 	OPT_BOOLEAN(0, "user-callchains", &record.opts.user_callchains,
 		    "collect user callchains"),
-	OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path",
-		   "clang binary to use for compiling BPF scriptlets"),
-	OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options",
-		   "options passed to clang when compiling BPF scriptlets"),
 	OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
 		   "file", "vmlinux pathname"),
 	OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
@@ -3967,27 +3951,6 @@ int cmd_record(int argc, const char **argv)

 	setlocale(LC_ALL, "");

-#ifndef HAVE_LIBBPF_SUPPORT
-# define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c)
-	set_nobuild('\0', "clang-path", true);
-	set_nobuild('\0', "clang-opt", true);
-# undef set_nobuild
-#endif
-
-#ifndef HAVE_BPF_PROLOGUE
-# if !defined (HAVE_DWARF_SUPPORT)
-#  define REASON  "NO_DWARF=1"
-# elif !defined (HAVE_LIBBPF_SUPPORT)
-#  define REASON  "NO_LIBBPF=1"
-# else
-#  define REASON  "this architecture doesn't support BPF prologue"
-# endif
-# define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c)
-	set_nobuild('\0', "vmlinux", true);
-# undef set_nobuild
-# undef REASON
-#endif
-
 #ifndef HAVE_BPF_SKEL
 # define set_nobuild(s, l, m, c) set_option_nobuild(record_options, s, l, m, c)
 	set_nobuild('\0', "off-cpu", "no BUILD_BPF_SKEL=1", true);
@@ -4116,14 +4079,6 @@ int cmd_record(int argc, const char **argv)
 	if (dry_run)
 		goto out;

-	err = bpf__setup_stdout(rec->evlist);
-	if (err) {
-		bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf));
-		pr_err("ERROR: Setup BPF stdout failed: %s\n",
-			 errbuf);
-		goto out;
-	}
-
 	err = -ENOMEM;

 	if (rec->no_buildid_cache || rec->no_buildid) {
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -18,6 +18,7 @@
 #include <api/fs/tracing_path.h>
 #ifdef HAVE_LIBBPF_SUPPORT
 #include <bpf/bpf.h>
+#include <bpf/libbpf.h>
 #endif
 #include "util/bpf_map.h"
 #include "util/rlimit.h"
@@ -53,7 +54,6 @@
 #include "trace/beauty/beauty.h"
 #include "trace-event.h"
 #include "util/parse-events.h"
-#include "util/bpf-loader.h"
 #include "util/tracepoint.h"
 #include "callchain.h"
 #include "print_binary.h"
@@ -3287,17 +3287,6 @@ static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const ch
 	return bpf_object__find_map_by_name(trace->bpf_obj, name);
 }

-static void trace__set_bpf_map_filtered_pids(struct trace *trace)
-{
-	trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
-}
-
-static void trace__set_bpf_map_syscalls(struct trace *trace)
-{
-	trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
-	trace->syscalls.prog_array.sys_exit  = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
-}
-
 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
 {
 	struct bpf_program *pos, *prog = NULL;
@@ -3553,25 +3542,6 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
 	return err;
 }

-static void trace__delete_augmented_syscalls(struct trace *trace)
-{
-	struct evsel *evsel, *tmp;
-
-	evlist__remove(trace->evlist, trace->syscalls.events.augmented);
-	evsel__delete(trace->syscalls.events.augmented);
-	trace->syscalls.events.augmented = NULL;
-
-	evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
-		if (evsel->bpf_obj == trace->bpf_obj) {
-			evlist__remove(trace->evlist, evsel);
-			evsel__delete(evsel);
-		}
-
-	}
-
-	bpf_object__close(trace->bpf_obj);
-	trace->bpf_obj = NULL;
-}
 #else // HAVE_LIBBPF_SUPPORT
 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused,
 						   const char *name __maybe_unused)
@@ -3579,45 +3549,12 @@ static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_u
 	return NULL;
 }

-static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused)
-{
-}
-
-static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused)
-{
-}
-
-static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
-							    const char *name __maybe_unused)
-{
-	return NULL;
-}
-
 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
 {
 	return 0;
 }
-
-static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
-{
-}
 #endif // HAVE_LIBBPF_SUPPORT

-static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
-{
-	struct evsel *evsel;
-
-	evlist__for_each_entry(trace->evlist, evsel) {
-		if (evsel == trace->syscalls.events.augmented ||
-		    evsel->bpf_obj == trace->bpf_obj)
-			continue;
-
-		return false;
-	}
-
-	return true;
-}
-
 static int trace__set_ev_qualifier_filter(struct trace *trace)
 {
 	if (trace->syscalls.events.sys_enter)
@@ -3981,16 +3918,6 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 	if (err < 0)
 		goto out_error_open;

-	err = bpf__apply_obj_config();
-	if (err) {
-		char errbuf[BUFSIZ];
-
-		bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
-		pr_err("ERROR: Apply config to BPF failed: %s\n",
-			 errbuf);
-		goto out_error_open;
-	}
-
 	err = trace__set_filter_pids(trace);
 	if (err < 0)
 		goto out_error_mem;
@@ -4922,77 +4849,6 @@ int cmd_trace(int argc, const char **argv)
 				       "cgroup monitoring only available in system-wide mode");
 	}

-	evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
-	if (IS_ERR(evsel)) {
-		bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
-		pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
-		goto out;
-	}
-
-	if (evsel) {
-		trace.syscalls.events.augmented = evsel;
-
-		evsel = evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
-		if (evsel == NULL) {
-			pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
-			goto out;
-		}
-
-		if (evsel->bpf_obj == NULL) {
-			pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
-			goto out;
-		}
-
-		trace.bpf_obj = evsel->bpf_obj;
-
-		/*
-		 * If we have _just_ the augmenter event but don't have a
-		 * explicit --syscalls, then assume we want all strace-like
-		 * syscalls:
-		 */
-		if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
-			trace.trace_syscalls = true;
-		/*
-		 * So, if we have a syscall augmenter, but trace_syscalls, aka
-		 * strace-like syscall tracing is not set, then we need to trow
-		 * away the augmenter, i.e. all the events that were created
-		 * from that BPF object file.
-		 *
-		 * This is more to fix the current .perfconfig trace.add_events
-		 * style of setting up the strace-like eBPF based syscall point
-		 * payload augmenter.
-		 *
-		 * All this complexity will be avoided by adding an alternative
-		 * to trace.add_events in the form of
-		 * trace.bpf_augmented_syscalls, that will be only parsed if we
-		 * need it.
-		 *
-		 * .perfconfig trace.add_events is still useful if we want, for
-		 * instance, have msr_write.msr in some .perfconfig profile based
-		 * 'perf trace --config determinism.profile' mode, where for some
-		 * particular goal/workload type we want a set of events and
-		 * output mode (with timings, etc) instead of having to add
-		 * all via the command line.
-		 *
-		 * Also --config to specify an alternate .perfconfig file needs
-		 * to be implemented.
-		 */
-		if (!trace.trace_syscalls) {
-			trace__delete_augmented_syscalls(&trace);
-		} else {
-			trace__set_bpf_map_filtered_pids(&trace);
-			trace__set_bpf_map_syscalls(&trace);
-			trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
-		}
-	}
-
-	err = bpf__setup_stdout(trace.evlist);
-	if (err) {
-		bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
-		pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
-		goto out;
-	}
-
 	err = -1;

 	if (map_dump_str) {
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -18,7 +18,6 @@
 #include <subcmd/run-command.h>
 #include "util/parse-events.h"
 #include <subcmd/parse-options.h>
-#include "util/bpf-loader.h"
 #include "util/debug.h"
 #include "util/event.h"
 #include "util/util.h" // usage()
@@ -324,7 +323,6 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 	perf_config__exit();
 	exit_browser(status);
 	perf_env__exit(&perf_env);
-	bpf__clear();

 	if (status)
 		return status & 0xff;
--- a/tools/perf/tests/.gitignore
+++ b/tools/perf/tests/.gitignore
@@ -1,5 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-llvm-src-base.c
-llvm-src-kbuild.c
-llvm-src-prologue.c
-llvm-src-relocation.c
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -37,8 +37,6 @@ perf-y += sample-parsing.o
 perf-y += parse-no-sample-id-all.o
 perf-y += kmod-path.o
 perf-y += thread-map.o
-perf-y += llvm.o llvm-src-base.o llvm-src-kbuild.o llvm-src-prologue.o llvm-src-relocation.o
-perf-y += bpf.o
 perf-y += topology.o
 perf-y += mem.o
 perf-y += cpumap.o
@@ -69,34 +67,6 @@ perf-y += sigtrap.o
 perf-y += event_groups.o
 perf-y += symbols.o

-$(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
-	$(call rule_mkdir)
-	$(Q)echo '#include <tests/llvm.h>' > $@
-	$(Q)echo 'const char test_llvm__bpf_base_prog[] =' >> $@
-	$(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@
-	$(Q)echo ';' >> $@
-
-$(OUTPUT)tests/llvm-src-kbuild.c: tests/bpf-script-test-kbuild.c tests/Build
-	$(call rule_mkdir)
-	$(Q)echo '#include <tests/llvm.h>' > $@
-	$(Q)echo 'const char test_llvm__bpf_test_kbuild_prog[] =' >> $@
-	$(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@
-	$(Q)echo ';' >> $@
-
-$(OUTPUT)tests/llvm-src-prologue.c: tests/bpf-script-test-prologue.c tests/Build
-	$(call rule_mkdir)
-	$(Q)echo '#include <tests/llvm.h>' > $@
-	$(Q)echo 'const char test_llvm__bpf_test_prologue_prog[] =' >> $@
-	$(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@
-	$(Q)echo ';' >> $@
-
-$(OUTPUT)tests/llvm-src-relocation.c: tests/bpf-script-test-relocation.c tests/Build
-	$(call rule_mkdir)
-	$(Q)echo '#include <tests/llvm.h>' > $@
-	$(Q)echo 'const char test_llvm__bpf_test_relocation[] =' >> $@
-	$(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@
-	$(Q)echo ';' >> $@
-
 ifeq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc))
 perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o
 endif
--- a/tools/perf/tests/bpf-script-example.c
+++ b/tools/perf/tests/bpf-script-example.c
@@ -1,60 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * bpf-script-example.c
- * Test basic LLVM building
- */
-#ifndef LINUX_VERSION_CODE
-# error Need LINUX_VERSION_CODE
-# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
-#endif
-#define BPF_ANY 0
-#define BPF_MAP_TYPE_ARRAY 2
-#define BPF_FUNC_map_lookup_elem 1
-#define BPF_FUNC_map_update_elem 2
-
-static void *(*bpf_map_lookup_elem)(void *map, void *key) =
-	(void *) BPF_FUNC_map_lookup_elem;
-static void *(*bpf_map_update_elem)(void *map, void *key, void *value, int flags) =
-	(void *) BPF_FUNC_map_update_elem;
-
-/*
- * Following macros are taken from tools/lib/bpf/bpf_helpers.h,
- * and are used to create BTF defined maps. It is easier to take
- * 2 simple macros, than being able to include above header in
- * runtime.
- *
- * __uint - defines integer attribute of BTF map definition,
- * Such attributes are represented using a pointer to an array,
- * in which dimensionality of array encodes specified integer
- * value.
- *
- * __type - defines pointer variable with typeof(val) type for
- * attributes like key or value, which will be defined by the
- * size of the type.
- */
-#define __uint(name, val) int (*name)[val]
-#define __type(name, val) typeof(val) *name
-
-#define SEC(NAME) __attribute__((section(NAME), used))
-struct {
-	__uint(type, BPF_MAP_TYPE_ARRAY);
-	__uint(max_entries, 1);
-	__type(key, int);
-	__type(value, int);
-} flip_table SEC(".maps");
-
-SEC("syscalls:sys_enter_epoll_pwait")
-int bpf_func__SyS_epoll_pwait(void *ctx)
-{
-	int ind =0;
-	int *flag = bpf_map_lookup_elem(&flip_table, &ind);
-	int new_flag;
-	if (!flag)
-		return 0;
-	/* flip flag and store back */
-	new_flag = !*flag;
-	bpf_map_update_elem(&flip_table, &ind, &new_flag, BPF_ANY);
-	return new_flag;
-}
-char _license[] SEC("license") = "GPL";
-int _version SEC("version") = LINUX_VERSION_CODE;
--- a/tools/perf/tests/bpf-script-test-kbuild.c
+++ b/tools/perf/tests/bpf-script-test-kbuild.c
@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * bpf-script-test-kbuild.c
- * Test include from kernel header
- */
-#ifndef LINUX_VERSION_CODE
-# error Need LINUX_VERSION_CODE
-# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
-#endif
-#define SEC(NAME) __attribute__((section(NAME), used))
-
-#include <uapi/linux/fs.h>
-
-SEC("func=vfs_llseek")
-int bpf_func__vfs_llseek(void *ctx)
-{
-	return 0;
-}
-
-char _license[] SEC("license") = "GPL";
-int _version SEC("version") = LINUX_VERSION_CODE;
--- a/tools/perf/tests/bpf-script-test-prologue.c
+++ b/tools/perf/tests/bpf-script-test-prologue.c
@@ -1,49 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * bpf-script-test-prologue.c
- * Test BPF prologue
- */
-#ifndef LINUX_VERSION_CODE
-# error Need LINUX_VERSION_CODE
-# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
-#endif
-#define SEC(NAME) __attribute__((section(NAME), used))
-
-#include <uapi/linux/fs.h>
-
-/*
- * If CONFIG_PROFILE_ALL_BRANCHES is selected,
- * 'if' is redefined after include kernel header.
- * Recover 'if' for BPF object code.
- */
-#ifdef if
-# undef if
-#endif
-
-typedef unsigned int __bitwise fmode_t;
-
-#define FMODE_READ		0x1
-#define FMODE_WRITE		0x2
-
-static void (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) =
-	(void *) 6;
-
-SEC("func=null_lseek file->f_mode offset orig")
-int bpf_func__null_lseek(void *ctx, int err, unsigned long _f_mode,
-			 unsigned long offset, unsigned long orig)
-{
-	fmode_t f_mode = (fmode_t)_f_mode;
-
-	if (err)
-		return 0;
-	if (f_mode & FMODE_WRITE)
-		return 0;
-	if (offset & 1)
-		return 0;
-	if (orig == SEEK_CUR)
-		return 0;
-	return 1;
-}
-
-char _license[] SEC("license") = "GPL";
-int _version SEC("version") = LINUX_VERSION_CODE;
--- a/tools/perf/tests/bpf-script-test-relocation.c
+++ b/tools/perf/tests/bpf-script-test-relocation.c
@@ -1,51 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * bpf-script-test-relocation.c
- * Test BPF loader checking relocation
- */
-#ifndef LINUX_VERSION_CODE
-# error Need LINUX_VERSION_CODE
-# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
-#endif
-#define BPF_ANY 0
-#define BPF_MAP_TYPE_ARRAY 2
-#define BPF_FUNC_map_lookup_elem 1
-#define BPF_FUNC_map_update_elem 2
-
-static void *(*bpf_map_lookup_elem)(void *map, void *key) =
-	(void *) BPF_FUNC_map_lookup_elem;
-static void *(*bpf_map_update_elem)(void *map, void *key, void *value, int flags) =
-	(void *) BPF_FUNC_map_update_elem;
-
-struct bpf_map_def {
-	unsigned int type;
-	unsigned int key_size;
-	unsigned int value_size;
-	unsigned int max_entries;
-};
-
-#define SEC(NAME) __attribute__((section(NAME), used))
-struct bpf_map_def SEC("maps") my_table = {
-	.type = BPF_MAP_TYPE_ARRAY,
-	.key_size = sizeof(int),
-	.value_size = sizeof(int),
-	.max_entries = 1,
-};
-
-int this_is_a_global_val;
-
-SEC("func=sys_write")
-int bpf_func__sys_write(void *ctx)
-{
-	int key = 0;
-	int value = 0;
-
-	/*
-	 * Incorrect relocation. Should not allow this program be
-	 * loaded into kernel.
-	 */
-	bpf_map_update_elem(&this_is_a_global_val, &key, &value, 0);
-	return 0;
-}
-char _license[] SEC("license") = "GPL";
-int _version SEC("version") = LINUX_VERSION_CODE;
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -1,390 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/epoll.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <util/record.h>
-#include <util/util.h>
-#include <util/bpf-loader.h>
-#include <util/evlist.h>
-#include <linux/filter.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <api/fs/fs.h>
-#include <perf/mmap.h>
-#include "tests.h"
-#include "llvm.h"
-#include "debug.h"
-#include "parse-events.h"
-#include "util/mmap.h"
-#define NR_ITERS       111
-#define PERF_TEST_BPF_PATH "/sys/fs/bpf/perf_test"
-
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
-#include <linux/bpf.h>
-#include <bpf/bpf.h>
-
-static int epoll_pwait_loop(void)
-{
-	struct epoll_event events;
-	int i;
-
-	/* Should fail NR_ITERS times */
-	for (i = 0; i < NR_ITERS; i++)
-		epoll_pwait(-(i + 1), &events, 0, 0, NULL);
-	return 0;
-}
-
-#ifdef HAVE_BPF_PROLOGUE
-
-static int llseek_loop(void)
-{
-	int fds[2], i;
-
-	fds[0] = open("/dev/null", O_RDONLY);
-	fds[1] = open("/dev/null", O_RDWR);
-
-	if (fds[0] < 0 || fds[1] < 0)
-		return -1;
-
-	for (i = 0; i < NR_ITERS; i++) {
-		lseek(fds[i % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
-		lseek(fds[(i + 1) % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
-	}
-	close(fds[0]);
-	close(fds[1]);
-	return 0;
-}
-
-#endif
-
-static struct {
-	enum test_llvm__testcase prog_id;
-	const char *name;
-	const char *msg_compile_fail;
-	const char *msg_load_fail;
-	int (*target_func)(void);
-	int expect_result;
-	bool	pin;
-} bpf_testcase_table[] = {
-	{
-		.prog_id	  = LLVM_TESTCASE_BASE,
-		.name		  = "[basic_bpf_test]",
-		.msg_compile_fail = "fix 'perf test LLVM' first",
-		.msg_load_fail	  = "load bpf object failed",
-		.target_func	  = &epoll_pwait_loop,
-		.expect_result	  = (NR_ITERS + 1) / 2,
-	},
-	{
-		.prog_id	  = LLVM_TESTCASE_BASE,
-		.name		  = "[bpf_pinning]",
-		.msg_compile_fail = "fix kbuild first",
-		.msg_load_fail	  = "check your vmlinux setting?",
-		.target_func	  = &epoll_pwait_loop,
-		.expect_result	  = (NR_ITERS + 1) / 2,
-		.pin		  = true,
-	},
-#ifdef HAVE_BPF_PROLOGUE
-	{
-		.prog_id	  = LLVM_TESTCASE_BPF_PROLOGUE,
-		.name		  = "[bpf_prologue_test]",
-		.msg_compile_fail = "fix kbuild first",
-		.msg_load_fail	  = "check your vmlinux setting?",
-		.target_func	  = &llseek_loop,
-		.expect_result	  = (NR_ITERS + 1) / 4,
-	},
-#endif
-};
-
-static int do_test(struct bpf_object *obj, int (*func)(void),
-		   int expect)
-{
-	struct record_opts opts = {
-		.target = {
-			.uid = UINT_MAX,
-			.uses_mmap = true,
-		},
-		.freq	      = 0,
-		.mmap_pages   = 256,
-		.default_interval = 1,
-	};
-
-	char pid[16];
-	char sbuf[STRERR_BUFSIZE];
-	struct evlist *evlist;
-	int i, ret = TEST_FAIL, err = 0, count = 0;
-
-	struct parse_events_state parse_state;
-	struct parse_events_error parse_error;
-
-	parse_events_error__init(&parse_error);
-	bzero(&parse_state, sizeof(parse_state));
-	parse_state.error = &parse_error;
-	INIT_LIST_HEAD(&parse_state.list);
-
-	err = parse_events_load_bpf_obj(&parse_state, &parse_state.list, obj, NULL, NULL);
-	parse_events_error__exit(&parse_error);
-	if (err == -ENODATA) {
-		pr_debug("Failed to add events selected by BPF, debuginfo package not installed\n");
-		return TEST_SKIP;
-	}
-	if (err || list_empty(&parse_state.list)) {
-		pr_debug("Failed to add events selected by BPF\n");
-		return TEST_FAIL;
-	}
-
-	snprintf(pid, sizeof(pid), "%d", getpid());
-	pid[sizeof(pid) - 1] = '\0';
-	opts.target.tid = opts.target.pid = pid;
-
-	/* Instead of evlist__new_default, don't add default events */
-	evlist = evlist__new();
-	if (!evlist) {
-		pr_debug("Not enough memory to create evlist\n");
-		return TEST_FAIL;
-	}
-
-	err = evlist__create_maps(evlist, &opts.target);
-	if (err < 0) {
-		pr_debug("Not enough memory to create thread/cpu maps\n");
-		goto out_delete_evlist;
-	}
-
-	evlist__splice_list_tail(evlist, &parse_state.list);
-
-	evlist__config(evlist, &opts, NULL);
-
-	err = evlist__open(evlist);
-	if (err < 0) {
-		pr_debug("perf_evlist__open: %s\n",
-			 str_error_r(errno, sbuf, sizeof(sbuf)));
-		goto out_delete_evlist;
-	}
-
-	err = evlist__mmap(evlist, opts.mmap_pages);
-	if (err < 0) {
-		pr_debug("evlist__mmap: %s\n",
-			 str_error_r(errno, sbuf, sizeof(sbuf)));
-		goto out_delete_evlist;
-	}
-
-	evlist__enable(evlist);
-	(*func)();
-	evlist__disable(evlist);
-
-	for (i = 0; i < evlist->core.nr_mmaps; i++) {
-		union perf_event *event;
-		struct mmap *md;
-
-		md = &evlist->mmap[i];
-		if (perf_mmap__read_init(&md->core) < 0)
-			continue;
-
-		while ((event = perf_mmap__read_event(&md->core)) != NULL) {
-			const u32 type = event->header.type;
-
-			if (type == PERF_RECORD_SAMPLE)
-				count ++;
-		}
-		perf_mmap__read_done(&md->core);
-	}
-
-	if (count != expect * evlist->core.nr_entries) {
-		pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect * evlist->core.nr_entries, count);
-		goto out_delete_evlist;
-	}
-
-	ret = TEST_OK;
-
-out_delete_evlist:
-	evlist__delete(evlist);
-	return ret;
-}
-
-static struct bpf_object *
-prepare_bpf(void *obj_buf, size_t obj_buf_sz, const char *name)
-{
-	struct bpf_object *obj;
-
-	obj = bpf__prepare_load_buffer(obj_buf, obj_buf_sz, name);
-	if (IS_ERR(obj)) {
-		pr_debug("Compile BPF program failed.\n");
-		return NULL;
-	}
-	return obj;
-}
-
-static int __test__bpf(int idx)
-{
-	int ret;
-	void *obj_buf;
-	size_t obj_buf_sz;
-	struct bpf_object *obj;
-
-	ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
-				       bpf_testcase_table[idx].prog_id,
-				       false, NULL);
-	if (ret != TEST_OK || !obj_buf || !obj_buf_sz) {
-		pr_debug("Unable to get BPF object, %s\n",
-			 bpf_testcase_table[idx].msg_compile_fail);
-		if ((idx == 0) || (ret == TEST_SKIP))
-			return TEST_SKIP;
-		else
-			return TEST_FAIL;
-	}
-
-	obj = prepare_bpf(obj_buf, obj_buf_sz,
-			  bpf_testcase_table[idx].name);
-	if ((!!bpf_testcase_table[idx].target_func) != (!!obj)) {
-		if (!obj)
-			pr_debug("Fail to load BPF object: %s\n",
-				 bpf_testcase_table[idx].msg_load_fail);
-		else
-			pr_debug("Success unexpectedly: %s\n",
-				 bpf_testcase_table[idx].msg_load_fail);
-		ret = TEST_FAIL;
-		goto out;
-	}
-
-	if (obj) {
-		ret = do_test(obj,
-			      bpf_testcase_table[idx].target_func,
-			      bpf_testcase_table[idx].expect_result);
-		if (ret != TEST_OK)
-			goto out;
-		if (bpf_testcase_table[idx].pin) {
-			int err;
-
-			if (!bpf_fs__mount()) {
-				pr_debug("BPF filesystem not mounted\n");
-				ret = TEST_FAIL;
-				goto out;
-			}
-			err = mkdir(PERF_TEST_BPF_PATH, 0777);
-			if (err && errno != EEXIST) {
-				pr_debug("Failed to make perf_test dir: %s\n",
-					 strerror(errno));
-				ret = TEST_FAIL;
-				goto out;
-			}
-			if (bpf_object__pin(obj, PERF_TEST_BPF_PATH))
-				ret = TEST_FAIL;
-			if (rm_rf(PERF_TEST_BPF_PATH))
-				ret = TEST_FAIL;
-		}
-	}
-
-out:
-	free(obj_buf);
-	bpf__clear();
-	return ret;
-}
-
-static int check_env(void)
-{
-	LIBBPF_OPTS(bpf_prog_load_opts, opts);
-	int err;
-	char license[] = "GPL";
-
-	struct bpf_insn insns[] = {
-		BPF_MOV64_IMM(BPF_REG_0, 1),
-		BPF_EXIT_INSN(),
-	};
-
-	err = fetch_kernel_version(&opts.kern_version, NULL, 0);
-	if (err) {
-		pr_debug("Unable to get kernel version\n");
-		return err;
-	}
-	err = bpf_prog_load(BPF_PROG_TYPE_KPROBE, NULL, license, insns,
-			    ARRAY_SIZE(insns), &opts);
-	if (err < 0) {
-		pr_err("Missing basic BPF support, skip this test: %s\n",
-		       strerror(errno));
-		return err;
-	}
-	close(err);
-
-	return 0;
-}
-
-static int test__bpf(int i)
-{
-	int err;
-
-	if (i < 0 || i >= (int)ARRAY_SIZE(bpf_testcase_table))
-		return TEST_FAIL;
-
-	if (geteuid() != 0) {
-		pr_debug("Only root can run BPF test\n");
-		return TEST_SKIP;
-	}
-
-	if (check_env())
-		return TEST_SKIP;
-
-	err = __test__bpf(i);
-	return err;
-}
-#endif
-
-static int test__basic_bpf_test(struct test_suite *test __maybe_unused,
-				int subtest __maybe_unused)
-{
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
-	return test__bpf(0);
-#else
-	pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
-	return TEST_SKIP;
-#endif
-}
-
-static int test__bpf_pinning(struct test_suite *test __maybe_unused,
-			     int subtest __maybe_unused)
-{
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
-	return test__bpf(1);
-#else
-	pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
-	return TEST_SKIP;
-#endif
-}
-
-static int test__bpf_prologue_test(struct test_suite *test __maybe_unused,
-				   int subtest __maybe_unused)
-{
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_BPF_PROLOGUE) && defined(HAVE_LIBTRACEEVENT)
-	return test__bpf(2);
-#else
-	pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
-	return TEST_SKIP;
-#endif
-}
-
-
-static struct test_case bpf_tests[] = {
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
-	TEST_CASE("Basic BPF filtering", basic_bpf_test),
-	TEST_CASE_REASON("BPF pinning", bpf_pinning,
-			"clang isn't installed or environment missing BPF support"),
-#ifdef HAVE_BPF_PROLOGUE
-	TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test,
-			"clang/debuginfo isn't installed or environment missing BPF support"),
-#else
-	TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test, "not compiled in"),
-#endif
-#else
-	TEST_CASE_REASON("Basic BPF filtering", basic_bpf_test, "not compiled in or missing libtraceevent support"),
-	TEST_CASE_REASON("BPF pinning", bpf_pinning, "not compiled in or missing libtraceevent support"),
-	TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test, "not compiled in or missing libtraceevent support"),
-#endif
-	{ .name = NULL, }
-};
-
-struct test_suite suite__bpf = {
-	.desc = "BPF filter",
-	.test_cases = bpf_tests,
-};
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -92,9 +92,7 @@ static struct test_suite *generic_tests[] = {
 	&suite__fdarray__add,
 	&suite__kmod_path__parse,
 	&suite__thread_map,
-	&suite__llvm,
 	&suite__session_topology,
-	&suite__bpf,
 	&suite__thread_map_synthesize,
 	&suite__thread_map_remove,
 	&suite__cpu_map,
--- a/tools/perf/tests/llvm.c
+++ b/tools/perf/tests/llvm.c
@@ -1,219 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "tests.h"
-#include "debug.h"
-
-#ifdef HAVE_LIBBPF_SUPPORT
-#include <bpf/libbpf.h>
-#include <util/llvm-utils.h>
-#include "llvm.h"
-static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
-{
-	struct bpf_object *obj;
-
-	obj = bpf_object__open_mem(obj_buf, obj_buf_sz, NULL);
-	if (libbpf_get_error(obj))
-		return TEST_FAIL;
-	bpf_object__close(obj);
-	return TEST_OK;
-}
-
-static struct {
-	const char *source;
-	const char *desc;
-	bool should_load_fail;
-} bpf_source_table[__LLVM_TESTCASE_MAX] = {
-	[LLVM_TESTCASE_BASE] = {
-		.source = test_llvm__bpf_base_prog,
-		.desc = "Basic BPF llvm compile",
-	},
-	[LLVM_TESTCASE_KBUILD] = {
-		.source = test_llvm__bpf_test_kbuild_prog,
-		.desc = "kbuild searching",
-	},
-	[LLVM_TESTCASE_BPF_PROLOGUE] = {
-		.source = test_llvm__bpf_test_prologue_prog,
-		.desc = "Compile source for BPF prologue generation",
-	},
-	[LLVM_TESTCASE_BPF_RELOCATION] = {
-		.source = test_llvm__bpf_test_relocation,
-		.desc = "Compile source for BPF relocation",
-		.should_load_fail = true,
-	},
-};
-
-int
-test_llvm__fetch_bpf_obj(void **p_obj_buf,
-			 size_t *p_obj_buf_sz,
-			 enum test_llvm__testcase idx,
-			 bool force,
-			 bool *should_load_fail)
-{
-	const char *source;
-	const char *desc;
-	const char *tmpl_old, *clang_opt_old;
-	char *tmpl_new = NULL, *clang_opt_new = NULL;
-	int err, old_verbose, ret = TEST_FAIL;
-
-	if (idx >= __LLVM_TESTCASE_MAX)
-		return TEST_FAIL;
-
-	source = bpf_source_table[idx].source;
-	desc = bpf_source_table[idx].desc;
-	if (should_load_fail)
-		*should_load_fail = bpf_source_table[idx].should_load_fail;
-
-	/*
-	 * Skip this test if user's .perfconfig doesn't set [llvm] section
-	 * and clang is not found in $PATH
-	 */
-	if (!force && (!llvm_param.user_set_param &&
-		       llvm__search_clang())) {
-		pr_debug("No clang, skip this test\n");
-		return TEST_SKIP;
-	}
-
-	/*
-	 * llvm is verbosity when error. Suppress all error output if
-	 * not 'perf test -v'.
-	 */
-	old_verbose = verbose;
-	if (verbose == 0)
-		verbose = -1;
-
-	*p_obj_buf = NULL;
-	*p_obj_buf_sz = 0;
-
-	if (!llvm_param.clang_bpf_cmd_template)
-		goto out;
-
-	if (!llvm_param.clang_opt)
-		llvm_param.clang_opt = strdup("");
-
-	err = asprintf(&tmpl_new, "echo '%s' | %s%s", source,
-		       llvm_param.clang_bpf_cmd_template,
-		       old_verbose ? "" : " 2>/dev/null");
-	if (err < 0)
-		goto out;
-	err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
-	if (err < 0)
-		goto out;
-
-	tmpl_old = llvm_param.clang_bpf_cmd_template;
-	llvm_param.clang_bpf_cmd_template = tmpl_new;
-	clang_opt_old = llvm_param.clang_opt;
-	llvm_param.clang_opt = clang_opt_new;
-
-	err = llvm__compile_bpf("-", p_obj_buf, p_obj_buf_sz);
-
-	llvm_param.clang_bpf_cmd_template = tmpl_old;
-	llvm_param.clang_opt = clang_opt_old;
-
-	verbose = old_verbose;
-	if (err)
-		goto out;
-
-	ret = TEST_OK;
-out:
-	free(tmpl_new);
-	free(clang_opt_new);
-	if (ret != TEST_OK)
-		pr_debug("Failed to compile test case: '%s'\n", desc);
-	return ret;
-}
-
-static int test__llvm(int subtest)
-{
-	int ret;
-	void *obj_buf = NULL;
-	size_t obj_buf_sz = 0;
-	bool should_load_fail = false;
-
-	if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
-		return TEST_FAIL;
-
-	ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
-				       subtest, false, &should_load_fail);
-
-	if (ret == TEST_OK && !should_load_fail) {
-		ret = test__bpf_parsing(obj_buf, obj_buf_sz);
-		if (ret != TEST_OK) {
-			pr_debug("Failed to parse test case '%s'\n",
-				 bpf_source_table[subtest].desc);
-		}
-	}
-	free(obj_buf);
-
-	return ret;
-}
-#endif //HAVE_LIBBPF_SUPPORT
-
-static int test__llvm__bpf_base_prog(struct test_suite *test __maybe_unused,
-				     int subtest __maybe_unused)
-{
-#ifdef HAVE_LIBBPF_SUPPORT
-	return test__llvm(LLVM_TESTCASE_BASE);
-#else
-	pr_debug("Skip LLVM test because BPF support is not compiled\n");
-	return TEST_SKIP;
-#endif
-}
-
-static int test__llvm__bpf_test_kbuild_prog(struct test_suite *test __maybe_unused,
-					    int subtest __maybe_unused)
-{
-#ifdef HAVE_LIBBPF_SUPPORT
-	return test__llvm(LLVM_TESTCASE_KBUILD);
-#else
-	pr_debug("Skip LLVM test because BPF support is not compiled\n");
-	return TEST_SKIP;
-#endif
-}
-
-static int test__llvm__bpf_test_prologue_prog(struct test_suite *test __maybe_unused,
-					      int subtest __maybe_unused)
-{
-#ifdef HAVE_LIBBPF_SUPPORT
-	return test__llvm(LLVM_TESTCASE_BPF_PROLOGUE);
-#else
-	pr_debug("Skip LLVM test because BPF support is not compiled\n");
-	return TEST_SKIP;
-#endif
-}
-
-static int test__llvm__bpf_test_relocation(struct test_suite *test __maybe_unused,
-					   int subtest __maybe_unused)
-{
-#ifdef HAVE_LIBBPF_SUPPORT
-	return test__llvm(LLVM_TESTCASE_BPF_RELOCATION);
-#else
-	pr_debug("Skip LLVM test because BPF support is not compiled\n");
-	return TEST_SKIP;
-#endif
-}
-
-
-static struct test_case llvm_tests[] = {
-#ifdef HAVE_LIBBPF_SUPPORT
-	TEST_CASE("Basic BPF llvm compile", llvm__bpf_base_prog),
-	TEST_CASE("kbuild searching", llvm__bpf_test_kbuild_prog),
-	TEST_CASE("Compile source for BPF prologue generation",
-		  llvm__bpf_test_prologue_prog),
-	TEST_CASE("Compile source for BPF relocation", llvm__bpf_test_relocation),
-#else
-	TEST_CASE_REASON("Basic BPF llvm compile", llvm__bpf_base_prog, "not compiled in"),
-	TEST_CASE_REASON("kbuild searching", llvm__bpf_test_kbuild_prog, "not compiled in"),
-	TEST_CASE_REASON("Compile source for BPF prologue generation",
-			llvm__bpf_test_prologue_prog, "not compiled in"),
-	TEST_CASE_REASON("Compile source for BPF relocation",
-			llvm__bpf_test_relocation, "not compiled in"),
-#endif
-	{ .name = NULL, }
-};
-
-struct test_suite suite__llvm = {
-	.desc = "LLVM search and compile",
-	.test_cases = llvm_tests,
-};
--- a/tools/perf/tests/llvm.h
+++ b/tools/perf/tests/llvm.h
@@ -1,31 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef PERF_TEST_LLVM_H
-#define PERF_TEST_LLVM_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <stddef.h> /* for size_t */
-#include <stdbool.h> /* for bool */
-
-extern const char test_llvm__bpf_base_prog[];
-extern const char test_llvm__bpf_test_kbuild_prog[];
-extern const char test_llvm__bpf_test_prologue_prog[];
-extern const char test_llvm__bpf_test_relocation[];
-
-enum test_llvm__testcase {
-	LLVM_TESTCASE_BASE,
-	LLVM_TESTCASE_KBUILD,
-	LLVM_TESTCASE_BPF_PROLOGUE,
-	LLVM_TESTCASE_BPF_RELOCATION,
-	__LLVM_TESTCASE_MAX,
-};
-
-int test_llvm__fetch_bpf_obj(void **p_obj_buf, size_t *p_obj_buf_sz,
-			     enum test_llvm__testcase index, bool force,
-			     bool *should_load_fail);
-#ifdef __cplusplus
-}
-#endif
-#endif
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -113,7 +113,6 @@ DECLARE_SUITE(fdarray__filter);
 DECLARE_SUITE(fdarray__add);
 DECLARE_SUITE(kmod_path__parse);
 DECLARE_SUITE(thread_map);
-DECLARE_SUITE(llvm);
 DECLARE_SUITE(bpf);
 DECLARE_SUITE(session_topology);
 DECLARE_SUITE(thread_map_synthesize);
@@ -129,7 +128,6 @@ DECLARE_SUITE(sdt_event);
 DECLARE_SUITE(is_printable_array);
 DECLARE_SUITE(bitmap_print);
 DECLARE_SUITE(perf_hooks);
-DECLARE_SUITE(clang);
 DECLARE_SUITE(unit_number__scnprint);
 DECLARE_SUITE(mem2node);
 DECLARE_SUITE(maps__merge_in);
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -23,7 +23,6 @@ perf-y += evswitch.o
 perf-y += find_bit.o
 perf-y += get_current_dir_name.o
 perf-y += levenshtein.o
-perf-y += llvm-utils.o
 perf-y += mmap.o
 perf-y += memswap.o
 perf-y += parse-events.o
@@ -150,7 +149,6 @@ perf-y += list_sort.o
 perf-y += mutex.o
 perf-y += sharded_mutex.o

-perf-$(CONFIG_LIBBPF) += bpf-loader.o
 perf-$(CONFIG_LIBBPF) += bpf_map.o
 perf-$(CONFIG_PERF_BPF_SKEL) += bpf_counter.o
 perf-$(CONFIG_PERF_BPF_SKEL) += bpf_counter_cgroup.o
@@ -168,7 +166,6 @@ ifeq ($(CONFIG_LIBTRACEEVENT),y)
  perf-$(CONFIG_PERF_BPF_SKEL) += bpf_kwork.o
 endif

-perf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o
 perf-$(CONFIG_LIBELF) += symbol-elf.o
 perf-$(CONFIG_LIBELF) += probe-file.o
 perf-$(CONFIG_LIBELF) += probe-event.o
@@ -235,7 +232,6 @@ perf-$(CONFIG_LIBBPF) += bpf-utils.o
 perf-$(CONFIG_LIBPFM4) += pfm.o

 CFLAGS_config.o   += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
-CFLAGS_llvm-utils.o += -DLIBBPF_INCLUDE_DIR="BUILD_STR($(libbpf_include_dir_SQ))"

 # avoid compiler warnings in 32-bit mode
 CFLAGS_genelf_debug.o  += -Wno-packed
@@ -327,7 +323,7 @@ ifeq ($(BISON_LT_381),1)
  bison_flags += -DYYNOMEM=YYABORT
 endif

-CFLAGS_parse-events-flex.o  += $(flex_flags)
+CFLAGS_parse-events-flex.o  += $(flex_flags) -Wno-unused-label
 CFLAGS_pmu-flex.o           += $(flex_flags)
 CFLAGS_expr-flex.o          += $(flex_flags)
 CFLAGS_bpf-filter-flex.o    += $(flex_flags)
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
--- a/tools/perf/util/bpf-loader.h
+++ b/tools/perf/util/bpf-loader.h
@@ -1,216 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
- * Copyright (C) 2015, Huawei Inc.
- */
-#ifndef __BPF_LOADER_H
-#define __BPF_LOADER_H
-
-#include <linux/compiler.h>
-#include <linux/err.h>
-
-#ifdef HAVE_LIBBPF_SUPPORT
-#include <bpf/libbpf.h>
-
-enum bpf_loader_errno {
-	__BPF_LOADER_ERRNO__START = __LIBBPF_ERRNO__START - 100,
-	/* Invalid config string */
-	BPF_LOADER_ERRNO__CONFIG = __BPF_LOADER_ERRNO__START,
-	BPF_LOADER_ERRNO__GROUP,	/* Invalid group name */
-	BPF_LOADER_ERRNO__EVENTNAME,	/* Event name is missing */
-	BPF_LOADER_ERRNO__INTERNAL,	/* BPF loader internal error */
-	BPF_LOADER_ERRNO__COMPILE,	/* Error when compiling BPF scriptlet */
-	BPF_LOADER_ERRNO__PROGCONF_TERM,/* Invalid program config term in config string */
-	BPF_LOADER_ERRNO__PROLOGUE,	/* Failed to generate prologue */
-	BPF_LOADER_ERRNO__PROLOGUE2BIG,	/* Prologue too big for program */
-	BPF_LOADER_ERRNO__PROLOGUEOOB,	/* Offset out of bound for prologue */
-	BPF_LOADER_ERRNO__OBJCONF_OPT,	/* Invalid object config option */
-	BPF_LOADER_ERRNO__OBJCONF_CONF,	/* Config value not set (lost '=')) */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_OPT,	/* Invalid object map config option */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_NOTEXIST,	/* Target map not exist */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE,	/* Incorrect value type for map */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE,	/* Incorrect map type */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_KEYSIZE,	/* Incorrect map key size */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_VALUESIZE,/* Incorrect map value size */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_NOEVT,	/* Event not found for map setting */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_MAPSIZE,	/* Invalid map size for event setting */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_EVTDIM,	/* Event dimension too large */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_EVTINH,	/* Doesn't support inherit event */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_EVTTYPE,	/* Wrong event type for map */
-	BPF_LOADER_ERRNO__OBJCONF_MAP_IDX2BIG,	/* Index too large */
-	__BPF_LOADER_ERRNO__END,
-};
-#endif // HAVE_LIBBPF_SUPPORT
-
-struct evsel;
-struct evlist;
-struct bpf_object;
-struct parse_events_term;
-#define PERF_BPF_PROBE_GROUP "perf_bpf_probe"
-
-typedef int (*bpf_prog_iter_callback_t)(const char *group, const char *event,
-					int fd, struct bpf_object *obj, void *arg);
-
-#ifdef HAVE_LIBBPF_SUPPORT
-struct bpf_object *bpf__prepare_load(const char *filename, bool source);
-int bpf__strerror_prepare_load(const char *filename, bool source,
-			       int err, char *buf, size_t size);
-
-struct bpf_object *bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz,
-					    const char *name);
-
-void bpf__clear(void);
-
-int bpf__probe(struct bpf_object *obj);
-int bpf__unprobe(struct bpf_object *obj);
-int bpf__strerror_probe(struct bpf_object *obj, int err,
-			char *buf, size_t size);
-
-int bpf__load(struct bpf_object *obj);
-int bpf__strerror_load(struct bpf_object *obj, int err,
-		       char *buf, size_t size);
-int bpf__foreach_event(struct bpf_object *obj,
-		       bpf_prog_iter_callback_t func, void *arg);
-
-int bpf__config_obj(struct bpf_object *obj, struct parse_events_term *term,
-		    struct evlist *evlist, int *error_pos);
-int bpf__strerror_config_obj(struct bpf_object *obj,
-			     struct parse_events_term *term,
-			     struct evlist *evlist,
-			     int *error_pos, int err, char *buf,
-			     size_t size);
-int bpf__apply_obj_config(void);
-int bpf__strerror_apply_obj_config(int err, char *buf, size_t size);
-
-int bpf__setup_stdout(struct evlist *evlist);
-struct evsel *bpf__setup_output_event(struct evlist *evlist, const char *name);
-int bpf__strerror_setup_output_event(struct evlist *evlist, int err, char *buf, size_t size);
-#else
-#include <errno.h>
-#include <string.h>
-#include "debug.h"
-
-static inline struct bpf_object *
-bpf__prepare_load(const char *filename __maybe_unused,
-		  bool source __maybe_unused)
-{
-	pr_debug("ERROR: eBPF object loading is disabled during compiling.\n");
-	return ERR_PTR(-ENOTSUP);
-}
-
-static inline struct bpf_object *
-bpf__prepare_load_buffer(void *obj_buf __maybe_unused,
-					   size_t obj_buf_sz __maybe_unused)
-{
-	return ERR_PTR(-ENOTSUP);
-}
-
-static inline void bpf__clear(void) { }
-
-static inline int bpf__probe(struct bpf_object *obj __maybe_unused) { return 0;}
-static inline int bpf__unprobe(struct bpf_object *obj __maybe_unused) { return 0;}
-static inline int bpf__load(struct bpf_object *obj __maybe_unused) { return 0; }
-
-static inline int
-bpf__foreach_event(struct bpf_object *obj __maybe_unused,
-		   bpf_prog_iter_callback_t func __maybe_unused,
-		   void *arg __maybe_unused)
-{
-	return 0;
-}
-
-static inline int
-bpf__config_obj(struct bpf_object *obj __maybe_unused,
-		struct parse_events_term *term __maybe_unused,
-		struct evlist *evlist __maybe_unused,
-		int *error_pos __maybe_unused)
-{
-	return 0;
-}
-
-static inline int
-bpf__apply_obj_config(void)
-{
-	return 0;
-}
-
-static inline int
-bpf__setup_stdout(struct evlist *evlist __maybe_unused)
-{
-	return 0;
-}
-
-static inline struct evsel *
-bpf__setup_output_event(struct evlist *evlist __maybe_unused, const char *name __maybe_unused)
-{
-	return NULL;
-}
-
-static inline int
-__bpf_strerror(char *buf, size_t size)
-{
-	if (!size)
-		return 0;
-	strncpy(buf,
-		"ERROR: eBPF object loading is disabled during compiling.\n",
-		size);
-	buf[size - 1] = '\0';
-	return 0;
-}
-
-static inline
-int bpf__strerror_prepare_load(const char *filename __maybe_unused,
-			       bool source __maybe_unused,
-			       int err __maybe_unused,
-			       char *buf, size_t size)
-{
-	return __bpf_strerror(buf, size);
-}
-
-static inline int
-bpf__strerror_probe(struct bpf_object *obj __maybe_unused,
-		    int err __maybe_unused,
-		    char *buf, size_t size)
-{
-	return __bpf_strerror(buf, size);
-}
-
-static inline int bpf__strerror_load(struct bpf_object *obj __maybe_unused,
-				     int err __maybe_unused,
-				     char *buf, size_t size)
-{
-	return __bpf_strerror(buf, size);
-}
-
-static inline int
-bpf__strerror_config_obj(struct bpf_object *obj __maybe_unused,
-			 struct parse_events_term *term __maybe_unused,
-			 struct evlist *evlist __maybe_unused,
-			 int *error_pos __maybe_unused,
-			 int err __maybe_unused,
-			 char *buf, size_t size)
-{
-	return __bpf_strerror(buf, size);
-}
-
-static inline int
-bpf__strerror_apply_obj_config(int err __maybe_unused,
-			       char *buf, size_t size)
-{
-	return __bpf_strerror(buf, size);
-}
-
-static inline int
-bpf__strerror_setup_output_event(struct evlist *evlist __maybe_unused,
-				 int err __maybe_unused, char *buf, size_t size)
-{
-	return __bpf_strerror(buf, size);
-}
-
-#endif
-
-static inline int bpf__strerror_setup_stdout(struct evlist *evlist, int err, char *buf, size_t size)
-{
-	return bpf__strerror_setup_output_event(evlist, err, buf, size);
-}
-#endif
--- a/Show More
+++ b/Show More