perf: Update perf to work with Linux 6.6

Update perf to match Yocto project master.  This requires both libtraceevent
and the updated perf integration.

This version was taking from Poky master commit:
   61182659c212db24e52cdbcdbb043c7b0de86094

Signed-off-by: Mark Hatle <mark.hatle@amd.com>

5 files changed, 622 insertions, 0 deletions

diff --git a/meta-xilinx-core/recipes-kernel/libtraceevent/libtraceevent/meson.patch b/meta-xilinx-core/recipes-kernel/libtraceevent/libtraceevent/meson.patch
new file mode 100644
index 00000000..38b61071
--- /dev/null
+++ b/meta-xilinx-core/recipes-kernel/libtraceevent/libtraceevent/meson.patch
@@ -0,0 +1,74 @@
+Fixes for the Meson build of libtraceevent:
+
+- Make the plugin directory the same as the Makefiles
+- Install the plugins as modules not static and versioned shared libraries
+- Add an option to disable building the documentation (needs asciidoc and xmlto)
+
+Upstream-Status: Pending
+Signed-off-by: Ross Burton <ross.burton@arm.com>
+
+diff --git a/meson.build b/meson.build
+index b61c873..4bba4d8 100644
+--- a/meson.build
++++ b/meson.build
+@@ -25,7 +25,7 @@ htmldir = join_paths(prefixdir, get_option('htmldir'))
+ libdir = join_paths(prefixdir, get_option('libdir'))
+ plugindir = get_option('plugindir')
+ if plugindir == ''
+-    plugindir = join_paths(libdir, 'libtraceevent/plugins')
++    plugindir = join_paths(libdir, 'traceevent/plugins')
+ endif
+ 
+ add_project_arguments(
+@@ -45,10 +45,13 @@ if cunit_dep.found()
+     subdir('utest')
+ endif
+ subdir('samples')
+-subdir('Documentation')
+ 
+-custom_target(
+-    'docs',
+-    output: 'docs',
+-    depends: [html, man],
+-    command: ['echo'])
++if get_option('docs')
++    subdir('Documentation')
++
++    custom_target(
++        'docs',
++        output: 'docs',
++        depends: [html, man],
++        command: ['echo'])
++endif
+diff --git a/meson_options.txt b/meson_options.txt
+index b2294f6..0611216 100644
+--- a/meson_options.txt
++++ b/meson_options.txt
+@@ -4,6 +4,10 @@
+ 
+ option('plugindir', type : 'string',
+        description : 'set the plugin dir')
++
++option('docs', type : 'boolean', value: true,
++       description : 'build documentation')
++
+ option('htmldir', type : 'string', value : 'share/doc/libtraceevent-doc',
+        description : 'directory for HTML documentation')
+ option('asciidoctor', type : 'boolean', value: false,
+diff --git a/plugins/meson.build b/plugins/meson.build
+index 74ad664..4919be4 100644
+--- a/plugins/meson.build
++++ b/plugins/meson.build
+@@ -19,11 +19,10 @@ plugins = [
+ 
+ pdeps = []
+ foreach plugin : plugins
+-    pdeps += library(
++    pdeps += shared_module(
+         plugin.replace('.c', ''),
+         plugin,
+         name_prefix: '',
+-        version: library_version,
+         dependencies: [libtraceevent_dep],
+         include_directories: [incdir],
+         install: true,
diff --git a/meta-xilinx-core/recipes-kernel/libtraceevent/libtraceevent_1.7.3.bb b/meta-xilinx-core/recipes-kernel/libtraceevent/libtraceevent_1.7.3.bb
new file mode 100644
index 00000000..bee78918
--- /dev/null
+++ b/meta-xilinx-core/recipes-kernel/libtraceevent/libtraceevent_1.7.3.bb
@@ -0,0 +1,23 @@
+# Copyright (C) 2022 Khem Raj <raj.khem@gmail.com>
+# Released under the MIT license (see COPYING.MIT for the terms)
+
+SUMMARY = "API to access the kernel tracefs directory"
+HOMEPAGE = "https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/"
+LICENSE = "GPL-2.0-or-later & LGPL-2.1-or-later"
+LIC_FILES_CHKSUM = "file://LICENSES/GPL-2.0;md5=e6a75371ba4d16749254a51215d13f97 \
+                    file://LICENSES/LGPL-2.1;md5=b370887980db5dd40659b50909238dbd"
+SECTION = "libs"
+
+SRCREV = "dd148189b74da3e2f45c7e536319fec97cb71213"
+SRC_URI = "git://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git;branch=${BPN};protocol=https \
+           file://meson.patch"
+
+S = "${WORKDIR}/git"
+
+inherit meson pkgconfig
+
+EXTRA_OEMESON = "-Ddocs=false"
+
+PACKAGES += "${PN}-plugins"
+
+FILES:${PN}-plugins += "${libdir}/traceevent/plugins"
diff --git a/meta-xilinx-core/recipes-kernel/perf/perf-perl.inc b/meta-xilinx-core/recipes-kernel/perf/perf-perl.inc
new file mode 100644
index 00000000..491f54c3
--- /dev/null
+++ b/meta-xilinx-core/recipes-kernel/perf/perf-perl.inc
@@ -0,0 +1,11 @@
+inherit perlnative cpan-base
+
+# Env var which tells perl if it should use host (no) or target (yes) settings
+export PERLCONFIGTARGET = "${@is_target(d)}"
+export PERL_INC = "${STAGING_LIBDIR}${PERL_OWN_DIR}/perl5/${@get_perl_version(d)}/${@get_perl_arch(d)}/CORE"
+export PERL_LIB = "${STAGING_LIBDIR}${PERL_OWN_DIR}/perl5/${@get_perl_version(d)}"
+export PERL_ARCHLIB = "${STAGING_LIBDIR}${PERL_OWN_DIR}/perl5/${@get_perl_version(d)}/${@get_perl_arch(d)}"
+
+# The perl symbols CPPSTDIN and CPPRUN embed the sysroot into the
+# binaries, work needed to remove this
+INSANE_SKIP:${PN}-dbg += "buildpaths"
diff --git a/meta-xilinx-core/recipes-kernel/perf/perf.bb b/meta-xilinx-core/recipes-kernel/perf/perf.bb
new file mode 100644
index 00000000..9164d93a
--- /dev/null
+++ b/meta-xilinx-core/recipes-kernel/perf/perf.bb
@@ -0,0 +1,414 @@
+SUMMARY = "Performance analysis tools for Linux"
+DESCRIPTION = "Performance counters for Linux are a new kernel-based \
+subsystem that provide a framework for all things \
+performance analysis. It covers hardware level \
+(CPU/PMU, Performance Monitoring Unit) features \
+and software features (software counters, tracepoints) \
+as well."
+HOMEPAGE = "https://perf.wiki.kernel.org/index.php/Main_Page"
+
+LICENSE = "GPL-2.0-only"
+
+PE = '1'
+
+PACKAGECONFIG ??= "python tui libunwind libtraceevent"
+PACKAGECONFIG[dwarf] = ",NO_DWARF=1"
+PACKAGECONFIG[perl] = ",NO_LIBPERL=1,perl"
+PACKAGECONFIG[python] = ",NO_LIBPYTHON=1,python3 python3-setuptools-native"
+# gui support was added with kernel 3.6.35
+# since 3.10 libnewt was replaced by slang
+# to cover a wide range of kernel we add both dependencies
+PACKAGECONFIG[tui] = ",NO_NEWT=1,libnewt slang"
+PACKAGECONFIG[libunwind] = ",NO_LIBUNWIND=1 NO_LIBDW_DWARF_UNWIND=1,libunwind"
+PACKAGECONFIG[libnuma] = ",NO_LIBNUMA=1"
+PACKAGECONFIG[bfd] = ",NO_LIBBFD=1"
+PACKAGECONFIG[systemtap] = ",NO_SDT=1,systemtap"
+PACKAGECONFIG[jvmti] = ",NO_JVMTI=1"
+# libaudit support would need scripting to be enabled
+PACKAGECONFIG[audit] = ",NO_LIBAUDIT=1,audit"
+PACKAGECONFIG[manpages] = ",,xmlto-native asciidoc-native"
+PACKAGECONFIG[cap] = ",,libcap"
+PACKAGECONFIG[libtraceevent] = ",NO_LIBTRACEEVENT=1,libtraceevent"
+# jevents requires host python for generating a .c file, but is
+# unrelated to the python item.
+PACKAGECONFIG[jevents] = ",NO_JEVENTS=1,python3-native"
+# Arm CoreSight
+PACKAGECONFIG[coresight] = "CORESIGHT=1,,opencsd"
+PACKAGECONFIG[pfm4] = ",NO_LIBPFM4=1,libpfm4"
+PACKAGECONFIG[babeltrace] = ",NO_LIBBABELTRACE=1,babeltrace"
+
+# libunwind is not yet ported for some architectures
+PACKAGECONFIG:remove:arc = "libunwind"
+PACKAGECONFIG:remove:riscv32 = "libunwind"
+
+DEPENDS = " \
+    virtual/${MLPREFIX}libc \
+    ${MLPREFIX}elfutils \
+    ${MLPREFIX}binutils \
+    bison-native flex-native xz \
+"
+
+do_configure[depends] += "virtual/kernel:do_shared_workdir"
+
+PROVIDES = "virtual/perf"
+
+inherit linux-kernel-base kernel-arch manpages
+
+# needed for building the tools/perf Python bindings
+inherit ${@bb.utils.contains('PACKAGECONFIG', 'python', 'python3targetconfig', '', d)}
+inherit python3-dir
+export PYTHON_SITEPACKAGES_DIR
+
+#kernel 3.1+ supports WERROR to disable warnings as errors
+export WERROR = "0"
+
+do_populate_lic[depends] += "virtual/kernel:do_shared_workdir"
+
+# needed for building the tools/perf Perl binding
+include ${@bb.utils.contains('PACKAGECONFIG', 'perl', 'perf-perl.inc', '', d)}
+
+inherit kernelsrc
+
+S = "${WORKDIR}/${BP}"
+SPDX_S = "${S}/tools/perf"
+
+# The LDFLAGS is required or some old kernels fails due missing
+# symbols and this is preferred than requiring patches to every old
+# supported kernel.
+LDFLAGS="-ldl -lutil"
+
+# Perf's build system adds its own optimization flags for most TUs,
+# overriding the flags included here. But for some, perf does not add
+# any -O option, so ensure the distro's chosen optimization gets used
+# for those. Since ${SELECTED_OPTIMIZATION} always includes
+# ${DEBUG_FLAGS} which in turn includes ${DEBUG_PREFIX_MAP}, this also
+# ensures perf is built with appropriate -f*-prefix-map options,
+# avoiding the 'buildpaths' QA warning.
+TARGET_CC_ARCH += "${SELECTED_OPTIMIZATION}"
+
+EXTRA_OEMAKE = '\
+    V=1 \
+    VF=1 \
+    -C ${S}/tools/perf \
+    O=${B} \
+    CROSS_COMPILE=${TARGET_PREFIX} \
+    ARCH=${ARCH} \
+    CC="${CC}" \
+    CCLD="${CC}" \
+    LDSHARED="${CC} -shared" \
+    AR="${AR}" \
+    LD="${LD}" \
+    EXTRA_CFLAGS="-ldw -I${S}" \
+    YFLAGS='-y --file-prefix-map=${WORKDIR}=${TARGET_DBGSRC_DIR}' \
+    EXTRA_LDFLAGS="${PERF_EXTRA_LDFLAGS}" \
+    perfexecdir=${libexecdir} \
+    NO_GTK2=1 \
+    ${PACKAGECONFIG_CONFARGS} \
+    PKG_CONFIG=pkg-config \
+    TMPDIR="${B}" \
+    LIBUNWIND_DIR=${STAGING_EXECPREFIXDIR} \
+'
+
+EXTRA_OEMAKE += "\
+    'DESTDIR=${D}' \
+    'prefix=${prefix}' \
+    'bindir=${bindir}' \
+    'sharedir=${datadir}' \
+    'sysconfdir=${sysconfdir}' \
+    'perfexecdir=${libexecdir}/perf-core' \
+    'ETC_PERFCONFIG=${@os.path.relpath(sysconfdir, prefix)}' \
+    'sharedir=${@os.path.relpath(datadir, prefix)}' \
+    'mandir=${@os.path.relpath(mandir, prefix)}' \
+    'infodir=${@os.path.relpath(infodir, prefix)}' \
+    ${@bb.utils.contains('PACKAGECONFIG', 'python', 'PYTHON=python3 PYTHON_CONFIG=python3-config', '', d)} \
+"
+
+# During do_configure, we might run a 'make clean'. That often breaks
+# when done in parallel, so disable parallelism for do_configure. Note
+# that it has to be done this way rather than by passing -j1, since
+# perf's build system by default ignores any -j argument, but does
+# honour a JOBS variable.
+EXTRA_OEMAKE:append:task-configure = " JOBS=1"
+
+PERF_SRC ?= "Makefile \
+             tools/arch \
+             tools/build \
+             tools/include \
+             tools/lib \
+             tools/Makefile \
+             tools/perf \
+             tools/scripts \
+             scripts/ \
+             arch/arm64/tools \
+             arch/${ARCH}/Makefile \
+"
+
+PERF_EXTRA_LDFLAGS = ""
+
+# MIPS N32/N64
+PERF_EXTRA_LDFLAGS:mipsarchn32eb = "-m elf32btsmipn32"
+PERF_EXTRA_LDFLAGS:mipsarchn32el = "-m elf32ltsmipn32"
+PERF_EXTRA_LDFLAGS:mipsarchn64eb = "-m elf64btsmip"
+PERF_EXTRA_LDFLAGS:mipsarchn64el = "-m elf64ltsmip"
+
+do_compile() {
+        # Linux kernel build system is expected to do the right thing
+        unset CFLAGS
+        test -e ${S}/tools/lib/traceevent/plugins/Makefile && \
+            sed -i -e 's|\$(libdir)/traceevent/plugins|\$(libdir)/traceevent_${KERNEL_VERSION}/plugins|g' ${S}/tools/lib/traceevent/plugins/Makefile
+        test -e ${S}/tools/perf/Makefile.config && \
+            sed -i -e 's|\$(libdir)/traceevent/plugins|\$(libdir)/traceevent_${KERNEL_VERSION}/plugins|g' ${S}/tools/perf/Makefile.config
+        oe_runmake all
+}
+
+do_install() {
+        # Linux kernel build system is expected to do the right thing
+        unset CFLAGS
+        oe_runmake install
+        # we are checking for this make target to be compatible with older perf versions
+        if ${@bb.utils.contains('PACKAGECONFIG', 'python', 'true', 'false', d)} && grep -q install-python_ext ${S}/tools/perf/Makefile*; then
+            oe_runmake DESTDIR=${D} install-python_ext
+            if [ -e ${D}${libdir}/python*/site-packages/perf-*/SOURCES.txt ]; then
+                sed -i -e 's#${WORKDIR}##g' ${D}${libdir}/python*/site-packages/perf-*/SOURCES.txt
+            fi
+        fi
+}
+
+do_configure[prefuncs] += "copy_perf_source_from_kernel"
+python copy_perf_source_from_kernel() {
+    sources = (d.getVar("PERF_SRC") or "").split()
+    src_dir = d.getVar("STAGING_KERNEL_DIR")
+    dest_dir = d.getVar("S")
+    bb.utils.mkdirhier(dest_dir)
+    bb.utils.prunedir(dest_dir)
+    for s in sources:
+        src = oe.path.join(src_dir, s)
+        dest = oe.path.join(dest_dir, s)
+        if not os.path.exists(src):
+            bb.warn("Path does not exist: %s. Maybe PERF_SRC lists more files than what your kernel version provides and needs." % src)
+            continue
+        if os.path.isdir(src):
+            oe.path.copyhardlinktree(src, dest)
+        else:
+            src_path = os.path.dirname(s)
+            os.makedirs(os.path.join(dest_dir,src_path),exist_ok=True)
+            bb.utils.copyfile(src, dest)
+}
+
+do_configure:prepend () {
+    # If building a multlib based perf, the incorrect library path will be
+    # detected by perf, since it triggers via: ifeq ($(ARCH),x86_64). In a 32 bit
+    # build, with a 64 bit multilib, the arch won't match and the detection of a 
+    # 64 bit build (and library) are not exected. To ensure that libraries are
+    # installed to the correct location, we can use the weak assignment in the
+    # config/Makefile.
+    #
+    # Also need to relocate .config-detected to $(OUTPUT)/config-detected
+    # for kernel sources that do not already do this
+    # as two builds (e.g. perf and lib32-perf from mutlilib can conflict
+    # with each other if its in the shared source directory
+    #
+    if [ -e "${S}/tools/perf/config/Makefile" ]; then
+        perfconfig="${S}/tools/perf/config/Makefile"
+    fi
+    if [ -e "${S}/tools/perf/Makefile.config" ]; then
+        perfconfig="${S}/tools/perf/Makefile.config"
+    fi
+    if [ -n "${perfconfig}" ]; then
+        # Match $(prefix)/$(lib) and $(prefix)/lib
+        sed -i -e 's,^libdir = \($(prefix)/.*lib\),libdir ?= \1,' \
+               -e 's,^perfexecdir = \(.*\),perfexecdir ?= \1,' \
+               -e 's,\ .config-detected, $(OUTPUT)/config-detected,g' \
+            ${perfconfig}
+    fi
+    # The man pages installation is "$(INSTALL) -d -m 755 $(DESTDIR)$(man1dir)"
+    # in ${S}/tools/perf/Documentation/Makefile, if the mandir set to '?=', it
+    # will use the relative path 'share/man', in the way it will resulting in
+    # incorrect installation for man pages.
+    if [ -e "${S}/tools/perf/Documentation/Makefile" ]; then
+        sed -i 's,^mandir?=,mandir:=,' ${S}/tools/perf/Documentation/Makefile
+    fi
+    if [ -e "${S}/tools/perf/Makefile.perf" ]; then
+        sed -i -e 's,\ .config-detected, $(OUTPUT)/config-detected,g' \
+            ${S}/tools/perf/Makefile.perf
+        sed -i -e "s,prefix='\$(DESTDIR_SQ)/usr'$,prefix='\$(DESTDIR_SQ)/usr' --install-lib='\$(PYTHON_SITEPACKAGES_DIR)' --root='\$(DESTDIR)',g" \
+            ${S}/tools/perf/Makefile.perf
+        # backport https://github.com/torvalds/linux/commit/e4ffd066ff440a57097e9140fa9e16ceef905de8
+        sed -i -e 's,\($(Q)$(SHELL) .$(arch_errno_tbl).\) $(CC) $(arch_errno_hdr_dir),\1 $(firstword $(CC)) $(arch_errno_hdr_dir),g' \
+            ${S}/tools/perf/Makefile.perf
+    fi
+    sed -i -e "s,--root='/\$(DESTDIR_SQ)',--prefix='\$(DESTDIR_SQ)/usr' --install-lib='\$(DESTDIR)\$(PYTHON_SITEPACKAGES_DIR)',g" \
+        ${S}/tools/perf/Makefile*
+
+    if [ -e "${S}/tools/build/Makefile.build" ]; then
+        sed -i -e 's,\ .config-detected, $(OUTPUT)/config-detected,g' \
+            ${S}/tools/build/Makefile.build
+    fi
+
+    # start reproducibility substitutions
+    if [ -e "${S}/tools/perf/Makefile.config" ]; then
+        # The following line in the Makefle:
+        #     override PYTHON := $(call get-executable-or-default,PYTHON,$(PYTHON_AUTO))
+        # "PYTHON" / "PYTHON_AUTO" have the full path as part of the variable. We've
+        # ensure that the environment is setup and we do not need the full path to be
+        # captured, since the symbol gets built into the executable, making it not
+        # reproducible.
+        sed -i -e 's,$(call get-executable-or-default\,PYTHON\,$(PYTHON_AUTO)),$(notdir $(call get-executable-or-default\,PYTHON\,$(PYTHON_AUTO))),g' \
+            ${S}/tools/perf/Makefile.config
+        # The same line is in older releases, but looking explicitly for Python 2
+        sed -i -e 's,$(call get-executable-or-default\,PYTHON\,$(PYTHON2)),$(notdir $(call get-executable-or-default\,PYTHON\,$(PYTHON2))),g' \
+            ${S}/tools/perf/Makefile.config
+
+        # likewise with this substitution. Kernels with commit 18f2967418d031a39
+        # [perf tools: Use Python devtools for version autodetection rather than runtime]
+        # need this substitution for reproducibility.
+        sed -i -e 's,$(call get-executable-or-default\,PYTHON\,$(subst -config\,\,$(PYTHON_AUTO))),$(notdir $(call get-executable-or-default\,PYTHON\,$(subst -config\,\,$(PYTHON_AUTO)))),g' \
+            ${S}/tools/perf/Makefile.config
+
+        # The following line:
+        #     srcdir_SQ = $(patsubst %tools/perf,tools/perf,$(subst ','\'',$(srcdir))),
+        # Captures the full src path of perf, which of course makes it not
+        # reproducible. We really only need the relative location 'tools/perf', so we
+        # change the Makefile line to remove everything before 'tools/perf'
+        sed -i -e "s%srcdir_SQ = \$(subst ','\\\'',\$(srcdir))%srcdir_SQ = \$(patsubst \%tools/perf,tools/perf,\$(subst ','\\\'',\$(srcdir)))%g" \
+            ${S}/tools/perf/Makefile.config
+        # Avoid hardcoded path to python-native
+        sed -i -e 's#\(PYTHON_WORD := \)$(call shell-wordify,$(PYTHON))#\1 python3#g' \
+            ${S}/tools/perf/Makefile.config
+    fi
+    if [ -e "${S}/tools/perf/tests/Build" ]; then
+        # OUTPUT is the full path, we have python on the path so we remove it from the
+        # definition. This is captured in the perf binary, so breaks reproducibility
+        sed -i -e 's,PYTHONPATH="BUILD_STR($(OUTPUT)python)",PYTHONPATH="BUILD_STR(python)",g' \
+            ${S}/tools/perf/tests/Build
+    fi
+    if [ -e "${S}/tools/perf/util/Build" ]; then
+        # To avoid bison generating #ifdefs that have captured paths, we make sure
+        # all the calls have YFLAGS, which contains prefix mapping information.
+        sed -i -e 's,$(BISON),$(BISON) $(YFLAGS),g' ${S}/tools/perf/util/Build
+    fi
+    if [ -e "${S}/scripts/Makefile.host" ]; then
+        # To avoid yacc (bison) generating #ifdefs that have captured paths, we make sure
+        # all the calls have YFLAGS, which contains prefix mapping information.
+        sed -i -e 's,$(YACC),$(YACC) $(YFLAGS),g' ${S}/scripts/Makefile.host
+    fi
+    if [ -e "${S}/tools/perf/pmu-events/Build" ]; then
+        target='$(OUTPUT)pmu-events/pmu-events.c $(V)'
+        replacement1='$(OUTPUT)pmu-events/pmu-events.c $(V)\n'
+        replacement2='\t$(srctree)/sort-pmuevents.py $(OUTPUT)pmu-events/pmu-events.c $(OUTPUT)pmu-events/pmu-events.c.new\n'
+        replacement3='\tcp $(OUTPUT)pmu-events/pmu-events.c.new $(OUTPUT)pmu-events/pmu-events.c'
+        sed -i -e "s,$target,$replacement1$replacement2$replacement3,g" \
+                       "${S}/tools/perf/pmu-events/Build"
+    fi
+    if [ -e "${S}/tools/perf/pmu-events/jevents.py" ]; then
+        sed -i -e "s#os.scandir(path)#sorted(os.scandir(path), key=lambda e: e.name)#g" \
+                       "${S}/tools/perf/pmu-events/jevents.py"
+    fi
+    if [ -e "${S}/tools/perf/arch/arm64/Makefile" ]; then
+        sed -i 's,sysdef := $(srctree)/,sysdef := ,' ${S}/tools/perf/arch/arm64/Makefile
+        sed -i 's,$(incpath) $(sysdef),$(incpath) $(srctree)/$(sysdef) $(sysdef),' ${S}/tools/perf/arch/arm64/Makefile
+    fi
+    if [ -e "${S}/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl" ]; then
+        if ! grep -q input_rel ${S}/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl; then
+            sed -i 's,input=$4,input=$4\ninput_rel=$5,' ${S}/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
+        fi
+        sed -i 's,#include \\"\$input\\",#include \\"\$input_rel\\",'  ${S}/tools/perf/arch/arm64/entry/syscalls/mksyscalltbl
+    fi
+    # end reproducibility substitutions
+
+    # We need to ensure the --sysroot option in CC is preserved
+    if [ -e "${S}/tools/perf/Makefile.perf" ]; then
+        sed -i 's,CC = $(CROSS_COMPILE)gcc,#CC,' ${S}/tools/perf/Makefile.perf
+        sed -i 's,AR = $(CROSS_COMPILE)ar,#AR,' ${S}/tools/perf/Makefile.perf
+        sed -i 's,LD = $(CROSS_COMPILE)ld,#LD,' ${S}/tools/perf/Makefile.perf
+        sed -i 's,PKG_CONFIG = $(CROSS_COMPILE)pkg-config,#PKG_CONFIG,' ${S}/tools/perf/Makefile.perf
+    fi
+    if [ -e "${S}/tools/lib/api/Makefile" ]; then
+        sed -i 's,CC = $(CROSS_COMPILE)gcc,#CC,' ${S}/tools/lib/api/Makefile
+        sed -i 's,AR = $(CROSS_COMPILE)ar,#AR,' ${S}/tools/lib/api/Makefile
+        sed -i 's,LD = $(CROSS_COMPILE)ld,#LD,' ${S}/tools/lib/api/Makefile
+    fi
+    if [ -e "${S}/tools/lib/subcmd/Makefile" ]; then
+        sed -i 's,CC = $(CROSS_COMPILE)gcc,#CC,' ${S}/tools/lib/subcmd/Makefile
+        sed -i 's,AR = $(CROSS_COMPILE)ar,#AR,' ${S}/tools/lib/subcmd/Makefile
+    fi
+    if [ -e "${S}/tools/perf/config/feature-checks/Makefile" ]; then
+        sed -i 's,CC := $(CROSS_COMPILE)gcc -MD,CC += -MD,' ${S}/tools/perf/config/feature-checks/Makefile
+    fi
+    if [ -e "${S}/tools/build/Makefile.feature" ]; then
+        sed -i 's,CFLAGS=,CC="\$(CC)" CFLAGS=,' ${S}/tools/build/Makefile.feature
+    fi
+    # The libperl feature check produces fatal warnings due to -Werror being
+    # used, silence enough errors that the check passes.
+    sed -i 's/\(FLAGS_PERL_EMBED=.*\)/\1 -Wno-error=unused-function -Wno-error=attributes/' ${S}/tools/build/feature/Makefile
+
+    # 3.17-rc1+ has a include issue for arm/powerpc. Temporarily sed in the appropriate include
+    if [ -e "${S}/tools/perf/arch/$ARCH/util/skip-callchain-idx.c" ]; then
+        sed -i 's,#include "util/callchain.h",#include "util/callchain.h"\n#include "util/debug.h",' ${S}/tools/perf/arch/$ARCH/util/skip-callchain-idx.c
+    fi
+    if [ -e "${S}/tools/perf/arch/arm/util/unwind-libunwind.c" ] && [ -e "${S}/tools/perf/arch/arm/tests/dwarf-unwind.c" ]; then
+        sed -i 's,#include "tests/tests.h",#include "tests/tests.h"\n#include "util/debug.h",' ${S}/tools/perf/arch/arm/tests/dwarf-unwind.c
+        sed -i 's,#include "perf_regs.h",#include "perf_regs.h"\n#include "util/debug.h",' ${S}/tools/perf/arch/arm/util/unwind-libunwind.c
+    fi
+
+    # use /usr/bin/env instead of version specific python
+    for s in `find ${S}/tools/perf/ -name '*.py'` `find ${S}/scripts/ -name 'bpf_helpers_doc.py'`; do
+        sed -i -e "s,#!.*python.*,#!${USRBINPATH}/env python3," ${s}
+    done
+
+    # unistd.h can be out of sync between libc-headers and the captured version in the perf source
+    # so we copy it from the sysroot unistd.h to the perf unistd.h
+    install -D -m0644 ${STAGING_INCDIR}/asm-generic/unistd.h ${S}/tools/include/uapi/asm-generic/unistd.h
+    install -D -m0644 ${STAGING_INCDIR}/asm-generic/unistd.h ${S}/include/uapi/asm-generic/unistd.h
+
+    # the fetcher is inhibited by the 'inherit kernelsrc', so we do a quick check and
+    # copy for a helper script we need
+    for p in $(echo ${FILESPATH} | tr ':' '\n'); do
+        if [ -e $p/sort-pmuevents.py ]; then
+            cp $p/sort-pmuevents.py ${S}
+        fi
+    done
+}
+
+python do_package:prepend() {
+    d.setVar('PKGV', d.getVar("KERNEL_VERSION").split("-")[0])
+}
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"
+
+
+PACKAGES =+ "${PN}-archive ${PN}-tests ${PN}-perl ${PN}-python"
+
+RDEPENDS:${PN} += "elfutils bash"
+RDEPENDS:${PN}-archive =+ "bash"
+RDEPENDS:${PN}-python =+ "bash python3 python3-modules ${@bb.utils.contains('PACKAGECONFIG', 'audit', 'audit-python', '', d)}"
+RDEPENDS:${PN}-perl =+ "bash perl perl-modules"
+RDEPENDS:${PN}-tests =+ "python3 bash"
+
+RSUGGESTS:${PN} += "${PN}-archive ${PN}-tests \
+                    ${@bb.utils.contains('PACKAGECONFIG', 'perl', '${PN}-perl', '', d)} \
+                    ${@bb.utils.contains('PACKAGECONFIG', 'python', '${PN}-python', '', d)} \
+                    "
+FILES_SOLIBSDEV = ""
+FILES:${PN} += "${libexecdir}/perf-core ${exec_prefix}/libexec/perf-core ${libdir}/traceevent* ${libdir}/libperf-jvmti.so"
+FILES:${PN}-archive = "${libdir}/perf/perf-core/perf-archive"
+FILES:${PN}-tests = "${libdir}/perf/perf-core/tests ${libexecdir}/perf-core/tests"
+FILES:${PN}-python = " \
+                       ${PYTHON_SITEPACKAGES_DIR} \
+                       ${libexecdir}/perf-core/scripts/python \
+                       "
+FILES:${PN}-perl = "${libexecdir}/perf-core/scripts/perl"
+
+DEBUG_OPTIMIZATION:append = " -Wno-error=maybe-uninitialized"
+
+PACKAGESPLITFUNCS =+ "perf_fix_sources"
+
+perf_fix_sources () {
+        for f in util/parse-events-flex.h util/parse-events-flex.c util/pmu-flex.c \
+                        util/pmu-flex.h util/expr-flex.h util/expr-flex.c; do
+                f=${PKGD}${TARGET_DBGSRC_DIR}/$f
+                if [ -e $f ]; then
+                        sed -i -e 's#${S}/##g' $f
+                fi
+        done
+}
diff --git a/meta-xilinx-core/recipes-kernel/perf/perf/sort-pmuevents.py b/meta-xilinx-core/recipes-kernel/perf/perf/sort-pmuevents.py
new file mode 100755
index 00000000..0362f2d8
--- /dev/null
+++ b/meta-xilinx-core/recipes-kernel/perf/perf/sort-pmuevents.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+
+# perf pmu-events sorting tool
+#
+# Copyright (C) 2021 Bruce Ashfield
+#
+# SPDX-License-Identifier: MIT
+#
+
+import sys
+import os
+import re
+from collections import OrderedDict
+
+if len(sys.argv) < 2:
+    print( "[ERROR]: input and output pmu files missing" )
+    sys.exit(1)
+
+if len(sys.argv) < 3:
+    print( "[ERROR]: output pmu file missing" )
+    sys.exit(1)
+
+infile = sys.argv[1]
+outfile = sys.argv[2]
+
+if not os.path.exists(infile):
+    print( "ERROR. input file does not exist: %s" % infile )
+    sys.exit(1)
+
+if os.path.exists(outfile):
+    print( "WARNING. output file will be overwritten: %s" % infile )
+
+with open(infile, 'r') as file:
+    data = file.read()
+
+preamble_regex = re.compile( '^(.*?)^(struct|const struct|static struct|static const struct)', re.MULTILINE | re.DOTALL )
+
+preamble = re.search( preamble_regex, data )
+struct_block_regex = re.compile( '^(struct|const struct|static struct|static const struct).*?(\w+) (.*?)\[\] = {(.*?)^};', re.MULTILINE | re.DOTALL )
+field_regex =  re.compile( '{.*?},', re.MULTILINE | re.DOTALL )
+cpuid_regex = re.compile( '\.cpuid = (.*?),', re.MULTILINE | re.DOTALL )
+name_regex = re.compile( '\.name = (.*?),', re.MULTILINE | re.DOTALL )
+
+# create a dictionary structure to store all the structs, their
+# types and then their fields.
+entry_dict = {}
+for struct in re.findall( struct_block_regex, data ):
+    # print( "struct: %s %s %s" % (struct[0],struct[1],struct[2]) )
+    entry_dict[struct[2]] = {}
+    entry_dict[struct[2]]['type_prefix'] = struct[0]
+    entry_dict[struct[2]]['type'] = struct[1]
+    entry_dict[struct[2]]['fields'] = {}
+    for entry in re.findall( field_regex, struct[3] ):
+        #print( "    entry: %s" % entry )
+        cpuid = re.search( cpuid_regex, entry )
+        if cpuid:
+            #print( "    cpuid found: %s" % cpuid.group(1) )
+            entry_dict[struct[2]]['fields'][cpuid.group(1)] = entry
+
+        name = re.search( name_regex, entry )
+        if name:
+            #print( "    name found: %s" % name.group(1) )
+            entry_dict[struct[2]]['fields'][name.group(1)] = entry
+
+        # unmatched entries are most likely array terminators and
+        # should end up as the last element in the sorted list, which
+        # is achieved by using '0' as the key
+        if not cpuid and not name:
+            entry_dict[struct[2]]['fields']['0'] = entry
+
+# created ordered dictionaries from the captured values. These are ordered by
+# a sorted() iteration of the keys. We don't care about the order we read
+# things, just the sorted order. Hency why we couldn't create these during
+# reading.
+#
+# yes, there's a more concise way to do this, but our nested dictionaries of
+# fields make it complex enough that it becomes unreadable.
+entry_dict_sorted = OrderedDict()
+for i in sorted(entry_dict.keys()):
+    entry_dict_sorted[i] = {}
+    entry_dict_sorted[i]['type_prefix'] = entry_dict[i]['type_prefix']
+    entry_dict_sorted[i]['type'] = entry_dict[i]['type']
+    entry_dict_sorted[i]['fields'] = {}
+    for f in sorted(entry_dict[i]['fields'].keys()):
+        entry_dict_sorted[i]['fields'][f] = entry_dict[i]['fields'][f] 
+
+# dump the sorted elements to the outfile
+outf = open( outfile, 'w' )
+
+print( preamble.group(1) )
+outf.write( preamble.group(1) )
+for d in entry_dict_sorted:
+    outf.write( "%s %s %s[] = {\n" % (entry_dict_sorted[d]['type_prefix'], entry_dict_sorted[d]['type'],d) )
+    for f in entry_dict_sorted[d]['fields']:
+        outf.write( entry_dict_sorted[d]['fields'][f] + '\n' )
+
+    outf.write( "};\n" )
+
+outf.close()
+