dev-util/perf: add 6.11

Signed-off-by: Guilherme Amadio <amadio@gentoo.org>

3 files changed, 816 insertions, 0 deletions

diff --git a/dev-util/perf/Manifest b/dev-util/perf/Manifest
index dcdacc5c4e18..13b16a36b71d 100644
--- a/dev-util/perf/Manifest
+++ b/dev-util/perf/Manifest
@@ -1,4 +1,5 @@
 DIST linux-6.10.tar.xz 145142812 BLAKE2B bb243ea7493b9d63aa2df2050a3f1ae2b89ee84a20015239cf157e3f4f51c7ac5efedc8a51132b2d7482f9276ac418de6624831c8a3b806130d9c2d2124c539b SHA512 baa2487954044f991d2ae254d77d14a1f0185dd62c9f0fcaff69f586c9f906823017b8db1c4588f27b076dfa3ebb606929fec859f60ea419e7974330b9289cc2
+DIST linux-6.11.tar.xz 146900704 BLAKE2B e7750c0878d71a56a0ce52d4c4c912199dad5bf5e2e8f872585a6494afbb37cbd852e612a6858936d2dc9b7776a3933818f540db408d57e90d18ea5249bba7ab SHA512 329c1f94008742e3f0c2ce7e591a16316d1b2cb9ea4596d4f45604097e07b7aa2f64afa40630a07f321a858455c77aa32ba57b271932ddcf4dc27863f9081cea
 DIST linux-6.3.tar.xz 136891752 BLAKE2B f1887c8924efa8d0cb14c4e604affd0b0168bcf20f56a37c027405c7bc11aba822a43fcb38ccb55a81a26f747d00e1ab5a6554818affbf1e1c7ef5220150fc69 SHA512 768979440f4907ba64d4481b383d6101faf208f27a0b897156123aa278c5743fe3c4f61945b2541429c532d45382aaee8899ea9d44a1d2895bfbb79bfd937f65
 DIST linux-6.7.tar.xz 141406528 BLAKE2B cecdbd19905e43e485ab73b352ced18b37f2a138c97a6956cadcda5d3d271001117dc1cf896b166ff019fc7f405f9539e2ed0d6112b0890efb04d182adf4fd0e SHA512 de06de556191614bd9daf077ae239360352a402bab407748e67f1e5108c92fd933e451707840ab22fe0f9976db3d1e1b60ca9d41cf894f015ca09b3f652b74ad
 DIST patch-6.10.4.xz 303168 BLAKE2B d38bbcdd2f730a030add5b38c1ab09c7081c311ed716d3ae976a058dd34b235078700cdff05d79dc93d9badb75c95566a3bdfc39dfa045d54857d82ee2c92e9d SHA512 5f5e8b19d114fed733c8c98a581fe339f8896e05e5da6a37deb1d7d8aa9dd83b3c80a97b1c6f3f51b6f20cca9c435b20c28c2c511da2026980d9fa72624cf420
diff --git a/dev-util/perf/files/perf-6.11-bpf-capstone.patch b/dev-util/perf/files/perf-6.11-bpf-capstone.patch
new file mode 100644
index 000000000000..7d8b376869f3
--- /dev/null
+++ b/dev-util/perf/files/perf-6.11-bpf-capstone.patch
@@ -0,0 +1,469 @@
+commit ea59b70a8418a313d6f2ab48a957de015fc33018
+Author: Arnaldo Carvalho de Melo <acme@redhat.com>
+Date:   Wed Jul 31 11:58:56 2024 -0300
+
+    perf bpf: Move BPF disassembly routines to separate file to avoid clash with capstone bpf headers
+    
+    There is a clash of the libbpf and capstone libraries, that ends up
+    with:
+    
+      In file included from /usr/include/capstone/capstone.h:325,
+                       from util/disasm.c:1513:
+      /usr/include/capstone/bpf.h:94:14: error: ‘bpf_insn’ defined as wrong kind of tag
+         94 | typedef enum bpf_insn {
+    
+    So far we're just trying to avoid this by not having both headers
+    included in the same .c or .h file, do it one more time by moving the
+    BPF diassembly routines from util/disasm.c to util/disasm_bpf.c.
+    
+    This is only being hit when building with BUILD_NONDISTRO=1, i.e.
+    building with binutils-devel, that isn't the in the default build due to
+    a licencing clash. We need to reimplement what is now isolated in
+    util/disasm_bpf.c using some other library to have BPF annotation
+    feature that now only is available with BUILD_NONDISTRO=1.
+    
+    Fixes: 6d17edc113de1e21 ("perf annotate: Use libcapstone to disassemble")
+    Cc: Adrian Hunter <adrian.hunter@intel.com>
+    Cc: Ian Rogers <irogers@google.com>
+    Cc: Jiri Olsa <jolsa@kernel.org>
+    Cc: Kan Liang <kan.liang@linux.intel.com>
+    Cc: Namhyung Kim <namhyung@kernel.org>
+    Link: https://lore.kernel.org/lkml/ZqpUSKPxMwaQKORr@x1
+    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
+
+diff --git a/tools/perf/util/Build b/tools/perf/util/Build
+index 0f18fe81ef0b..b24360c04aae 100644
+--- a/tools/perf/util/Build
++++ b/tools/perf/util/Build
+@@ -13,6 +13,7 @@ perf-util-y += copyfile.o
+ perf-util-y += ctype.o
+ perf-util-y += db-export.o
+ perf-util-y += disasm.o
++perf-util-y += disasm_bpf.o
+ perf-util-y += env.o
+ perf-util-y += event.o
+ perf-util-y += evlist.o
+diff --git a/tools/perf/util/disasm.c b/tools/perf/util/disasm.c
+index 410e52cd9cfd..85fb0cfedf94 100644
+--- a/tools/perf/util/disasm.c
++++ b/tools/perf/util/disasm.c
+@@ -16,6 +16,7 @@
+ #include "build-id.h"
+ #include "debug.h"
+ #include "disasm.h"
++#include "disasm_bpf.h"
+ #include "dso.h"
+ #include "env.h"
+ #include "evsel.h"
+@@ -1323,192 +1324,6 @@ static int dso__disassemble_filename(struct dso *dso, char *filename, size_t fil
+ 	return 0;
+ }
+ 
+-#if defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT)
+-#define PACKAGE "perf"
+-#include <bfd.h>
+-#include <dis-asm.h>
+-#include <bpf/bpf.h>
+-#include <bpf/btf.h>
+-#include <bpf/libbpf.h>
+-#include <linux/btf.h>
+-#include <tools/dis-asm-compat.h>
+-
+-#include "bpf-event.h"
+-#include "bpf-utils.h"
+-
+-static int symbol__disassemble_bpf(struct symbol *sym,
+-				   struct annotate_args *args)
+-{
+-	struct annotation *notes = symbol__annotation(sym);
+-	struct bpf_prog_linfo *prog_linfo = NULL;
+-	struct bpf_prog_info_node *info_node;
+-	int len = sym->end - sym->start;
+-	disassembler_ftype disassemble;
+-	struct map *map = args->ms.map;
+-	struct perf_bpil *info_linear;
+-	struct disassemble_info info;
+-	struct dso *dso = map__dso(map);
+-	int pc = 0, count, sub_id;
+-	struct btf *btf = NULL;
+-	char tpath[PATH_MAX];
+-	size_t buf_size;
+-	int nr_skip = 0;
+-	char *buf;
+-	bfd *bfdf;
+-	int ret;
+-	FILE *s;
+-
+-	if (dso__binary_type(dso) != DSO_BINARY_TYPE__BPF_PROG_INFO)
+-		return SYMBOL_ANNOTATE_ERRNO__BPF_INVALID_FILE;
+-
+-	pr_debug("%s: handling sym %s addr %" PRIx64 " len %" PRIx64 "\n", __func__,
+-		  sym->name, sym->start, sym->end - sym->start);
+-
+-	memset(tpath, 0, sizeof(tpath));
+-	perf_exe(tpath, sizeof(tpath));
+-
+-	bfdf = bfd_openr(tpath, NULL);
+-	if (bfdf == NULL)
+-		abort();
+-
+-	if (!bfd_check_format(bfdf, bfd_object))
+-		abort();
+-
+-	s = open_memstream(&buf, &buf_size);
+-	if (!s) {
+-		ret = errno;
+-		goto out;
+-	}
+-	init_disassemble_info_compat(&info, s,
+-				     (fprintf_ftype) fprintf,
+-				     fprintf_styled);
+-	info.arch = bfd_get_arch(bfdf);
+-	info.mach = bfd_get_mach(bfdf);
+-
+-	info_node = perf_env__find_bpf_prog_info(dso__bpf_prog(dso)->env,
+-						 dso__bpf_prog(dso)->id);
+-	if (!info_node) {
+-		ret = SYMBOL_ANNOTATE_ERRNO__BPF_MISSING_BTF;
+-		goto out;
+-	}
+-	info_linear = info_node->info_linear;
+-	sub_id = dso__bpf_prog(dso)->sub_id;
+-
+-	info.buffer = (void *)(uintptr_t)(info_linear->info.jited_prog_insns);
+-	info.buffer_length = info_linear->info.jited_prog_len;
+-
+-	if (info_linear->info.nr_line_info)
+-		prog_linfo = bpf_prog_linfo__new(&info_linear->info);
+-
+-	if (info_linear->info.btf_id) {
+-		struct btf_node *node;
+-
+-		node = perf_env__find_btf(dso__bpf_prog(dso)->env,
+-					  info_linear->info.btf_id);
+-		if (node)
+-			btf = btf__new((__u8 *)(node->data),
+-				       node->data_size);
+-	}
+-
+-	disassemble_init_for_target(&info);
+-
+-#ifdef DISASM_FOUR_ARGS_SIGNATURE
+-	disassemble = disassembler(info.arch,
+-				   bfd_big_endian(bfdf),
+-				   info.mach,
+-				   bfdf);
+-#else
+-	disassemble = disassembler(bfdf);
+-#endif
+-	if (disassemble == NULL)
+-		abort();
+-
+-	fflush(s);
+-	do {
+-		const struct bpf_line_info *linfo = NULL;
+-		struct disasm_line *dl;
+-		size_t prev_buf_size;
+-		const char *srcline;
+-		u64 addr;
+-
+-		addr = pc + ((u64 *)(uintptr_t)(info_linear->info.jited_ksyms))[sub_id];
+-		count = disassemble(pc, &info);
+-
+-		if (prog_linfo)
+-			linfo = bpf_prog_linfo__lfind_addr_func(prog_linfo,
+-								addr, sub_id,
+-								nr_skip);
+-
+-		if (linfo && btf) {
+-			srcline = btf__name_by_offset(btf, linfo->line_off);
+-			nr_skip++;
+-		} else
+-			srcline = NULL;
+-
+-		fprintf(s, "\n");
+-		prev_buf_size = buf_size;
+-		fflush(s);
+-
+-		if (!annotate_opts.hide_src_code && srcline) {
+-			args->offset = -1;
+-			args->line = strdup(srcline);
+-			args->line_nr = 0;
+-			args->fileloc = NULL;
+-			args->ms.sym  = sym;
+-			dl = disasm_line__new(args);
+-			if (dl) {
+-				annotation_line__add(&dl->al,
+-						     &notes->src->source);
+-			}
+-		}
+-
+-		args->offset = pc;
+-		args->line = buf + prev_buf_size;
+-		args->line_nr = 0;
+-		args->fileloc = NULL;
+-		args->ms.sym  = sym;
+-		dl = disasm_line__new(args);
+-		if (dl)
+-			annotation_line__add(&dl->al, &notes->src->source);
+-
+-		pc += count;
+-	} while (count > 0 && pc < len);
+-
+-	ret = 0;
+-out:
+-	free(prog_linfo);
+-	btf__free(btf);
+-	fclose(s);
+-	bfd_close(bfdf);
+-	return ret;
+-}
+-#else // defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT)
+-static int symbol__disassemble_bpf(struct symbol *sym __maybe_unused,
+-				   struct annotate_args *args __maybe_unused)
+-{
+-	return SYMBOL_ANNOTATE_ERRNO__NO_LIBOPCODES_FOR_BPF;
+-}
+-#endif // defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT)
+-
+-static int
+-symbol__disassemble_bpf_image(struct symbol *sym,
+-			      struct annotate_args *args)
+-{
+-	struct annotation *notes = symbol__annotation(sym);
+-	struct disasm_line *dl;
+-
+-	args->offset = -1;
+-	args->line = strdup("to be implemented");
+-	args->line_nr = 0;
+-	args->fileloc = NULL;
+-	dl = disasm_line__new(args);
+-	if (dl)
+-		annotation_line__add(&dl->al, &notes->src->source);
+-
+-	zfree(&args->line);
+-	return 0;
+-}
+-
+ #ifdef HAVE_LIBCAPSTONE_SUPPORT
+ #include <capstone/capstone.h>
+ 
+diff --git a/tools/perf/util/disasm_bpf.c b/tools/perf/util/disasm_bpf.c
+new file mode 100644
+index 000000000000..1fee71c79b62
+--- /dev/null
++++ b/tools/perf/util/disasm_bpf.c
+@@ -0,0 +1,195 @@
++// SPDX-License-Identifier: GPL-2.0-only
++
++#include "util/annotate.h"
++#include "util/disasm_bpf.h"
++#include "util/symbol.h"
++#include <linux/zalloc.h>
++#include <string.h>
++
++#if defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT)
++#define PACKAGE "perf"
++#include <bfd.h>
++#include <bpf/bpf.h>
++#include <bpf/btf.h>
++#include <bpf/libbpf.h>
++#include <dis-asm.h>
++#include <errno.h>
++#include <linux/btf.h>
++#include <tools/dis-asm-compat.h>
++
++#include "util/bpf-event.h"
++#include "util/bpf-utils.h"
++#include "util/debug.h"
++#include "util/dso.h"
++#include "util/map.h"
++#include "util/env.h"
++#include "util/util.h"
++
++int symbol__disassemble_bpf(struct symbol *sym, struct annotate_args *args)
++{
++	struct annotation *notes = symbol__annotation(sym);
++	struct bpf_prog_linfo *prog_linfo = NULL;
++	struct bpf_prog_info_node *info_node;
++	int len = sym->end - sym->start;
++	disassembler_ftype disassemble;
++	struct map *map = args->ms.map;
++	struct perf_bpil *info_linear;
++	struct disassemble_info info;
++	struct dso *dso = map__dso(map);
++	int pc = 0, count, sub_id;
++	struct btf *btf = NULL;
++	char tpath[PATH_MAX];
++	size_t buf_size;
++	int nr_skip = 0;
++	char *buf;
++	bfd *bfdf;
++	int ret;
++	FILE *s;
++
++	if (dso__binary_type(dso) != DSO_BINARY_TYPE__BPF_PROG_INFO)
++		return SYMBOL_ANNOTATE_ERRNO__BPF_INVALID_FILE;
++
++	pr_debug("%s: handling sym %s addr %" PRIx64 " len %" PRIx64 "\n", __func__,
++		  sym->name, sym->start, sym->end - sym->start);
++
++	memset(tpath, 0, sizeof(tpath));
++	perf_exe(tpath, sizeof(tpath));
++
++	bfdf = bfd_openr(tpath, NULL);
++	if (bfdf == NULL)
++		abort();
++
++	if (!bfd_check_format(bfdf, bfd_object))
++		abort();
++
++	s = open_memstream(&buf, &buf_size);
++	if (!s) {
++		ret = errno;
++		goto out;
++	}
++	init_disassemble_info_compat(&info, s,
++				     (fprintf_ftype) fprintf,
++				     fprintf_styled);
++	info.arch = bfd_get_arch(bfdf);
++	info.mach = bfd_get_mach(bfdf);
++
++	info_node = perf_env__find_bpf_prog_info(dso__bpf_prog(dso)->env,
++						 dso__bpf_prog(dso)->id);
++	if (!info_node) {
++		ret = SYMBOL_ANNOTATE_ERRNO__BPF_MISSING_BTF;
++		goto out;
++	}
++	info_linear = info_node->info_linear;
++	sub_id = dso__bpf_prog(dso)->sub_id;
++
++	info.buffer = (void *)(uintptr_t)(info_linear->info.jited_prog_insns);
++	info.buffer_length = info_linear->info.jited_prog_len;
++
++	if (info_linear->info.nr_line_info)
++		prog_linfo = bpf_prog_linfo__new(&info_linear->info);
++
++	if (info_linear->info.btf_id) {
++		struct btf_node *node;
++
++		node = perf_env__find_btf(dso__bpf_prog(dso)->env,
++					  info_linear->info.btf_id);
++		if (node)
++			btf = btf__new((__u8 *)(node->data),
++				       node->data_size);
++	}
++
++	disassemble_init_for_target(&info);
++
++#ifdef DISASM_FOUR_ARGS_SIGNATURE
++	disassemble = disassembler(info.arch,
++				   bfd_big_endian(bfdf),
++				   info.mach,
++				   bfdf);
++#else
++	disassemble = disassembler(bfdf);
++#endif
++	if (disassemble == NULL)
++		abort();
++
++	fflush(s);
++	do {
++		const struct bpf_line_info *linfo = NULL;
++		struct disasm_line *dl;
++		size_t prev_buf_size;
++		const char *srcline;
++		u64 addr;
++
++		addr = pc + ((u64 *)(uintptr_t)(info_linear->info.jited_ksyms))[sub_id];
++		count = disassemble(pc, &info);
++
++		if (prog_linfo)
++			linfo = bpf_prog_linfo__lfind_addr_func(prog_linfo,
++								addr, sub_id,
++								nr_skip);
++
++		if (linfo && btf) {
++			srcline = btf__name_by_offset(btf, linfo->line_off);
++			nr_skip++;
++		} else
++			srcline = NULL;
++
++		fprintf(s, "\n");
++		prev_buf_size = buf_size;
++		fflush(s);
++
++		if (!annotate_opts.hide_src_code && srcline) {
++			args->offset = -1;
++			args->line = strdup(srcline);
++			args->line_nr = 0;
++			args->fileloc = NULL;
++			args->ms.sym  = sym;
++			dl = disasm_line__new(args);
++			if (dl) {
++				annotation_line__add(&dl->al,
++						     &notes->src->source);
++			}
++		}
++
++		args->offset = pc;
++		args->line = buf + prev_buf_size;
++		args->line_nr = 0;
++		args->fileloc = NULL;
++		args->ms.sym  = sym;
++		dl = disasm_line__new(args);
++		if (dl)
++			annotation_line__add(&dl->al, &notes->src->source);
++
++		pc += count;
++	} while (count > 0 && pc < len);
++
++	ret = 0;
++out:
++	free(prog_linfo);
++	btf__free(btf);
++	fclose(s);
++	bfd_close(bfdf);
++	return ret;
++}
++#else // defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT)
++int symbol__disassemble_bpf(struct symbol *sym __maybe_unused, struct annotate_args *args __maybe_unused)
++{
++	return SYMBOL_ANNOTATE_ERRNO__NO_LIBOPCODES_FOR_BPF;
++}
++#endif // defined(HAVE_LIBBFD_SUPPORT) && defined(HAVE_LIBBPF_SUPPORT)
++
++int symbol__disassemble_bpf_image(struct symbol *sym, struct annotate_args *args)
++{
++	struct annotation *notes = symbol__annotation(sym);
++	struct disasm_line *dl;
++
++	args->offset = -1;
++	args->line = strdup("to be implemented");
++	args->line_nr = 0;
++	args->fileloc = NULL;
++	dl = disasm_line__new(args);
++	if (dl)
++		annotation_line__add(&dl->al, &notes->src->source);
++
++	zfree(&args->line);
++	return 0;
++}
+diff --git a/tools/perf/util/disasm_bpf.h b/tools/perf/util/disasm_bpf.h
+new file mode 100644
+index 000000000000..2ecb19545388
+--- /dev/null
++++ b/tools/perf/util/disasm_bpf.h
+@@ -0,0 +1,12 @@
++// SPDX-License-Identifier: GPL-2.0-only
++
++#ifndef __PERF_DISASM_BPF_H
++#define __PERF_DISASM_BPF_H
++
++struct symbol;
++struct annotate_args;
++
++int symbol__disassemble_bpf(struct symbol *sym, struct annotate_args *args);
++int symbol__disassemble_bpf_image(struct symbol *sym, struct annotate_args *args);
++
++#endif /* __PERF_DISASM_BPF_H */
diff --git a/dev-util/perf/perf-6.11.ebuild b/dev-util/perf/perf-6.11.ebuild
new file mode 100644
index 000000000000..b523d8477bf6
--- /dev/null
+++ b/dev-util/perf/perf-6.11.ebuild
@@ -0,0 +1,346 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+LLVM_COMPAT=( {16..19} )
+PYTHON_COMPAT=( python3_{10..13} )
+inherit bash-completion-r1 estack flag-o-matic linux-info llvm-r1 toolchain-funcs python-r1
+
+DESCRIPTION="Userland tools for Linux Performance Counters"
+HOMEPAGE="https://perf.wiki.kernel.org/"
+
+LINUX_V="${PV:0:1}.x"
+if [[ ${PV} == *_rc* ]] ; then
+	LINUX_VER=$(ver_cut 1-2).$(($(ver_cut 3)-1))
+	PATCH_VERSION=$(ver_cut 1-3)
+	LINUX_PATCH=patch-${PV//_/-}.xz
+	SRC_URI="https://www.kernel.org/pub/linux/kernel/v${LINUX_V}/testing/${LINUX_PATCH}
+		https://www.kernel.org/pub/linux/kernel/v${LINUX_V}/testing/v${PATCH_VERSION}/${LINUX_PATCH}"
+elif [[ ${PV} == *.*.* ]] ; then
+	# stable-release series
+	LINUX_VER=$(ver_cut 1-2)
+	LINUX_PATCH=patch-${PV}.xz
+	SRC_URI="https://www.kernel.org/pub/linux/kernel/v${LINUX_V}/${LINUX_PATCH}"
+else
+	LINUX_VER=${PV}
+fi
+
+LINUX_SOURCES="linux-${LINUX_VER}.tar.xz"
+SRC_URI+=" https://www.kernel.org/pub/linux/kernel/v${LINUX_V}/${LINUX_SOURCES}"
+
+S_K="${WORKDIR}/linux-${LINUX_VER}"
+S="${S_K}/tools/perf"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86 ~amd64-linux ~x86-linux"
+IUSE="abi_mips_o32 abi_mips_n32 abi_mips_n64 audit babeltrace capstone big-endian bpf caps crypt debug +doc gtk java libpfm +libtraceevent +libtracefs lzma numa perl python slang systemtap tcmalloc unwind zstd"
+
+REQUIRED_USE="
+	${PYTHON_REQUIRED_USE}
+"
+
+# setuptools (and Python) are always needed even if not building Python bindings
+BDEPEND="
+	${LINUX_PATCH+dev-util/patchutils}
+	${PYTHON_DEPS}
+	>=app-arch/tar-1.34-r2
+	dev-python/setuptools[${PYTHON_USEDEP}]
+	app-alternatives/yacc
+	app-alternatives/lex
+	virtual/pkgconfig
+	doc? (
+		app-text/asciidoc
+		app-text/sgml-common
+		app-text/xmlto
+		sys-process/time
+	)
+"
+
+RDEPEND="
+	audit? ( sys-process/audit )
+	babeltrace? ( dev-util/babeltrace:0/1 )
+	bpf? (
+		dev-libs/libbpf
+		dev-util/bpftool
+		dev-util/pahole
+		$(llvm_gen_dep '
+			sys-devel/clang:${LLVM_SLOT}=
+			sys-devel/llvm:${LLVM_SLOT}=
+		')
+	)
+	caps? ( sys-libs/libcap )
+	capstone? ( dev-libs/capstone )
+	crypt? ( dev-libs/openssl:= )
+	gtk? ( x11-libs/gtk+:2 )
+	java? ( virtual/jre:* )
+	libpfm? ( dev-libs/libpfm:= )
+	libtraceevent? ( dev-libs/libtraceevent )
+	libtracefs? ( dev-libs/libtracefs )
+	lzma? ( app-arch/xz-utils )
+	numa? ( sys-process/numactl )
+	perl? ( dev-lang/perl:= )
+	python? ( ${PYTHON_DEPS} )
+	slang? ( sys-libs/slang )
+	systemtap? ( dev-debug/systemtap )
+	tcmalloc? ( dev-util/google-perftools )
+	unwind? ( sys-libs/libunwind:= )
+	zstd? ( app-arch/zstd:= )
+	dev-libs/elfutils
+	sys-libs/binutils-libs:=
+	sys-libs/zlib
+	virtual/libcrypt
+"
+
+DEPEND="${RDEPEND}
+	>=sys-kernel/linux-headers-5.10
+	java? ( virtual/jdk )
+"
+
+QA_FLAGS_IGNORED=(
+	'usr/bin/perf-read-vdso32' # not linked with anything except for libc
+	'usr/libexec/perf-core/dlfilters/.*' # plugins
+)
+
+pkg_pretend() {
+	if ! use doc ; then
+		ewarn "Without the doc USE flag you won't get any documentation nor man pages."
+		ewarn "And without man pages, you won't get any --help output for perf and its"
+		ewarn "sub-tools."
+	fi
+}
+
+pkg_setup() {
+	local CONFIG_CHECK="
+		~DEBUG_INFO
+		~FTRACE
+		~FTRACE_SYSCALLS
+		~FUNCTION_TRACER
+		~KALLSYMS
+		~KALLSYMS_ALL
+		~KPROBES
+		~KPROBE_EVENTS
+		~PERF_EVENTS
+		~UPROBES
+		~UPROBE_EVENTS
+	"
+
+	use bpf && llvm-r1_pkg_setup
+	# We enable python unconditionally as libbpf always generates
+	# API headers using python script
+	python_setup
+
+	if use bpf ; then
+		CONFIG_CHECK+="~BPF ~BPF_EVENTS ~BPF_SYSCALL ~DEBUG_INFO_BTF ~HAVE_EBPF_JIT"
+	fi
+
+	linux-info_pkg_setup
+}
+
+# src_unpack and src_prepare are copied to dev-util/bpftool since
+# it's building from the same tarball, please keep it in sync with bpftool
+src_unpack() {
+	local paths=(
+		'arch/*/include/*' 'arch/*/lib/*' 'arch/*/tools/*' 'include/*'
+		'kernel/bpf/*' 'lib/*' 'scripts/*' 'tools/arch/*' 'tools/bpf/*'
+		'tools/build/*' 'tools/include/*' 'tools/lib/*' 'tools/perf/*'
+		'tools/scripts/*'
+	)
+
+	# We expect the tar implementation to support the -j option (both
+	# GNU tar and libarchive's tar support that).
+	echo ">>> Unpacking ${LINUX_SOURCES} (${paths[*]}) to ${PWD}"
+	gtar --wildcards -xpf "${DISTDIR}"/${LINUX_SOURCES} \
+		"${paths[@]/#/linux-${LINUX_VER}/}" || die
+
+	if [[ -n ${LINUX_PATCH} ]] ; then
+		eshopts_push -o noglob
+		ebegin "Filtering partial source patch"
+		xzcat "${DISTDIR}"/${LINUX_PATCH} | filterdiff -p1 ${paths[@]/#/-i} > ${P}.patch
+		assert -n "Unpacking to ${P} from ${DISTDIR}/${LINUX_PATCH} failed"
+		eend $? || die "filterdiff failed"
+		test -s ${P}.patch || die "patch is empty?!"
+		eshopts_pop
+	fi
+
+	local a
+	for a in ${A}; do
+		[[ ${a} == ${LINUX_SOURCES} ]] && continue
+		[[ ${a} == ${LINUX_PATCH} ]] && continue
+		unpack ${a}
+	done
+}
+
+src_prepare() {
+	default
+	if [[ -n ${LINUX_PATCH} ]] ; then
+		pushd "${S_K}" >/dev/null || die
+		eapply "${WORKDIR}"/${P}.patch
+		popd || die
+	fi
+
+	pushd "${S_K}" >/dev/null || die
+	eapply "${FILESDIR}"/perf-6.11-bpf-capstone.patch
+	popd || die
+
+	# Drop some upstream too-developer-oriented flags and fix the
+	# Makefile in general
+	sed -i \
+		-e "s@\$(sysconfdir_SQ)/bash_completion.d@$(get_bashcompdir)@" \
+		"${S}"/Makefile.perf || die
+	# A few places still use -Werror w/out $(WERROR) protection.
+	sed -i -e 's@-Werror@@' \
+		"${S}"/Makefile.perf "${S_K}"/tools/lib/bpf/Makefile \
+		"${S_K}"/tools/lib/perf/Makefile || die
+
+	# Avoid the call to make kernelversion
+	sed -i -e '/PERF-VERSION-GEN/d' Makefile.perf || die
+	echo "#define PERF_VERSION \"${PV}\"" > PERF-VERSION-FILE
+
+	# The code likes to compile local assembly files which lack ELF markings.
+	find -name '*.S' -exec sed -i '$a.section .note.GNU-stack,"",%progbits' {} +
+}
+
+puse() { usex $1 "" 1; }
+perf_make() {
+	# The arch parsing is a bit funky.  The perf tools package is integrated
+	# into the kernel, so it wants an ARCH that looks like the kernel arch,
+	# but it also wants to know about the split value -- i386/x86_64 vs just
+	# x86.  We can get that by telling the func to use an older linux version.
+	# It's kind of a hack, but not that bad ...
+
+	# LIBDIR sets a search path of perf-gtk.so. Bug 515954
+
+	local arch=$(tc-arch-kernel)
+	local java_dir
+	use java && java_dir="${EPREFIX}/etc/java-config-2/current-system-vm"
+
+	# sync this with the whitelist in tools/perf/Makefile.config
+	local disable_libdw
+	if ! use amd64 && ! use x86 && \
+	   ! use arm && \
+	   ! use arm64 && \
+	   ! use ppc && ! use ppc64 \
+	   ! use s390 && \
+	   ! use riscv && \
+	   ! use loong
+	then
+		disable_libdw=1
+	fi
+
+	# perf directly invokes LD for linking without going through CC, on mips
+	# it is required to specify the emulation.  port of below buildroot patch
+	# https://patchwork.ozlabs.org/project/buildroot/patch/20170217105905.32151-1-Vincent.Riera@imgtec.com/
+	local linker="$(tc-getLD)"
+	if use mips
+	then
+		if use big-endian
+		then
+			use abi_mips_n64 && linker+=" -m elf64btsmip"
+			use abi_mips_n32 && linker+=" -m elf32btsmipn32"
+			use abi_mips_o32 && linker+=" -m elf32btsmip"
+		else
+			use abi_mips_n64 && linker+=" -m elf64ltsmip"
+			use abi_mips_n32 && linker+=" -m elf32ltsmipn32"
+			use abi_mips_o32 && linker+=" -m elf32ltsmip"
+		fi
+	fi
+
+	# FIXME: NO_CORESIGHT
+	local emakeargs=(
+		V=1 VF=1
+		HOSTCC="$(tc-getBUILD_CC)" HOSTLD="$(tc-getBUILD_LD)"
+		CC="$(tc-getCC)" CXX="$(tc-getCXX)" AR="$(tc-getAR)" LD="${linker}" NM="$(tc-getNM)"
+		CLANG="${CHOST}-clang"
+		PKG_CONFIG="$(tc-getPKG_CONFIG)"
+		prefix="${EPREFIX}/usr" bindir_relative="bin"
+		tipdir="share/doc/${PF}"
+		EXTRA_CFLAGS="${CFLAGS}"
+		EXTRA_LDFLAGS="${LDFLAGS}"
+		ARCH="${arch}"
+		BUILD_BPF_SKEL=$(usex bpf 1 "") \
+		BUILD_NONDISTRO=1
+		JDIR="${java_dir}"
+		CORESIGHT=
+		GTK2=$(usex gtk 1 "")
+		feature-gtk2-infobar=$(usex gtk 1 "")
+		NO_AUXTRACE=
+		NO_BACKTRACE=
+		NO_CAPSTONE=$(puse capstone)
+		NO_DEMANGLE=
+		NO_JEVENTS=$(puse python)
+		NO_JVMTI=$(puse java)
+		NO_LIBAUDIT=$(puse audit)
+		NO_LIBBABELTRACE=$(puse babeltrace)
+		NO_LIBBIONIC=1
+		NO_LIBBPF=$(puse bpf)
+		NO_LIBCAP=$(puse caps)
+		NO_LIBCRYPTO=$(puse crypt)
+		NO_LIBDW_DWARF_UNWIND="${disable_libdw}"
+		NO_LIBELF=
+		NO_LIBNUMA=$(puse numa)
+		NO_LIBPERL=$(puse perl)
+		NO_LIBPFM4=$(puse libpfm)
+		NO_LIBPYTHON=$(puse python)
+		NO_LIBTRACEEVENT=$(puse libtraceevent)
+		NO_LIBUNWIND=$(puse unwind)
+		NO_LIBZSTD=$(puse zstd)
+		NO_SDT=$(puse systemtap)
+		NO_SHELLCHECK=1
+		NO_SLANG=$(puse slang)
+		NO_LZMA=$(puse lzma)
+		NO_ZLIB=
+		TCMALLOC=$(usex tcmalloc 1 "")
+		WERROR=0
+		DEBUG=$(usex debug 1 "")
+		LIBDIR="/usr/libexec/perf-core"
+		libdir="${EPREFIX}/usr/$(get_libdir)"
+		plugindir="${EPREFIX}/usr/$(get_libdir)/perf/plugins"
+		"$@"
+	)
+	emake "${emakeargs[@]}"
+}
+
+src_compile() {
+	filter-lto
+
+	perf_make -f Makefile.perf
+	use doc && perf_make -C Documentation man
+}
+
+src_test() {
+	:
+}
+
+src_install() {
+	_install_python_ext() {
+		perf_make -f Makefile.perf install-python_ext DESTDIR="${D}"
+	}
+
+	perf_make -f Makefile.perf install DESTDIR="${D}"
+
+	if use python; then
+		python_foreach_impl _install_python_ext
+	fi
+
+	if use gtk; then
+		local libdir
+		libdir="$(get_libdir)"
+		# on some arches it ends up in lib even on 64bit, ppc64 for instance.
+		[[ -f "${ED}"/usr/lib/libperf-gtk.so ]] && libdir="lib"
+		mv "${ED}"/usr/${libdir}/libperf-gtk.so \
+			"${ED}"/usr/libexec/perf-core || die
+	fi
+
+	dodoc CREDITS
+
+	dodoc *txt Documentation/*.txt
+
+	# perf needs this decompressed to print out tips for users
+	docompress -x /usr/share/doc/${PF}/tips.txt
+
+	if use doc ; then
+		doman Documentation/*.1
+	fi
+}