[PATCH v3 1/2] linux-custom: build perf and add it to the linux-perf package

["'Isaac True' via isar-users" <isar-users@googlegroups.com>]

Add an additional package to the linux-custom recipe containing the perf
tool, which is built as part of the kernel build process. This package
is only created and perf is only built if the "notools" profile is not
active, which is controlled by the new variable "KERNEL_BUILD_NOTOOLS"
and enabled by default.

Signed-off-by: Isaac True <itrue@emlix.com>
---
 meta/recipes-kernel/linux/files/debian/control.tmpl    |  9 +++++++++
 meta/recipes-kernel/linux/files/debian/isar/build.tmpl |  3 +++
 .../recipes-kernel/linux/files/debian/isar/common.tmpl |  2 ++
 .../linux/files/debian/isar/install.tmpl               |  7 +++++++
 meta/recipes-kernel/linux/files/debian/rules.tmpl      |  2 +-
 meta/recipes-kernel/linux/linux-custom.inc             | 10 ++++++++++
 6 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/meta/recipes-kernel/linux/files/debian/control.tmpl b/meta/recipes-kernel/linux/files/debian/control.tmpl
index ee87cf92..155c2808 100644
--- a/meta/recipes-kernel/linux/files/debian/control.tmpl
+++ b/meta/recipes-kernel/linux/files/debian/control.tmpl
@@ -69,3 +69,12 @@ Conflicts: linux-kbuild-${KERNEL_NAME_PROVIDED}
 Description: ${KERNEL_NAME_PROVIDED} Linux kbuild scripts and tools for @KR@
  This package provides kernel kbuild scripts and tools for @KR@
  This is useful for people who need to build external modules
+
+Package: linux-perf-${KERNEL_NAME_PROVIDED}
+Build-Profiles: <pkg.${BPN}.kernel !pkg.${BPN}.notools>
+Section: devel
+Architecture: any
+Multi-Arch: foreign
+Depends: ${shlibs:Depends}, ${misc:Depends}, ${perl:Depends}, ${python3:Depends}
+Description: ${KERNEL_NAME_PROVIDED} performance analysis tools for @KR@
+ This package contains the 'perf' performance analysis tools for @KR@.
diff --git a/meta/recipes-kernel/linux/files/debian/isar/build.tmpl b/meta/recipes-kernel/linux/files/debian/isar/build.tmpl
index b4c105c1..f518ce34 100644
--- a/meta/recipes-kernel/linux/files/debian/isar/build.tmpl
+++ b/meta/recipes-kernel/linux/files/debian/isar/build.tmpl
@@ -23,6 +23,9 @@ do_build() {
 
     if echo "${DEB_BUILD_PROFILES}" | grep -q "kernel"; then # Build kernel scripts and tools
         ${MAKE} O=${KERNEL_BUILD_DIR} ${PARALLEL_MAKE} ${KERNEL_EXTRA_BUILDARGS} KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}"
+        if ! echo "${DEB_BUILD_PROFILES}" | grep -q "notools"; then # Build kernel tools
+            ${MAKE} O=${KERNEL_BUILD_DIR} ${PARALLEL_MAKE} ${KERNEL_EXTRA_BUILDARGS} KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}" -C tools/perf
+        fi
     elif echo "${DEB_BUILD_PROFILES}" | grep -q "kbuild"; then # Build kernel scripts and tools
         ${MAKE} O=${KERNEL_BUILD_DIR} ${PARALLEL_MAKE} ${KERNEL_EXTRA_BUILDARGS} KCFLAGS="${KCFLAGS}" KAFLAGS="${KAFLAGS}" scripts
         if grep -q -E "CONFIG_STACK_VALIDATION=y|CONFIG_HAVE_OBJTOOL=y" ${KERNEL_BUILD_DIR}/.config && [ -d "tools/objtool" ]; then
diff --git a/meta/recipes-kernel/linux/files/debian/isar/common.tmpl b/meta/recipes-kernel/linux/files/debian/isar/common.tmpl
index f9cc2f02..07283dcd 100644
--- a/meta/recipes-kernel/linux/files/debian/isar/common.tmpl
+++ b/meta/recipes-kernel/linux/files/debian/isar/common.tmpl
@@ -12,6 +12,7 @@ KERNEL_PKG_LIBC_HEADERS=linux-libc-dev
 KERNEL_PKG_LIBC_HEADERS_CROSS=linux-libc-dev-${DISTRO_ARCH}-cross
 KERNEL_PKG_KERN_KBUILD=linux-kbuild-${KERNEL_NAME_PROVIDED}
 KERNEL_PKG_KERN_KBUILD_CROSS=${KERNEL_PKG_KERN_KBUILD}-${DISTRO_ARCH}-cross
+KERNEL_PKG_PERF=linux-perf-${KERNEL_NAME_PROVIDED}
 
 # Force creating debian package with valid host arch for -native build
 # Use a cross build to comply with arch specific kernel defconfigs
@@ -38,6 +39,7 @@ deb_libc_hdr_dir=${deb_top_dir}/${KERNEL_PKG_LIBC_HEADERS}
 deb_libc_hdr_cross_dir=${deb_top_dir}/${KERNEL_PKG_LIBC_HEADERS_CROSS}
 deb_kern_kbuild_dir=${deb_top_dir}/${KERNEL_PKG_KERN_KBUILD}
 deb_kern_kbuild_cross_dir=${deb_top_dir}/${KERNEL_PKG_KERN_KBUILD_CROSS}
+deb_perf_dir=${deb_top_dir}/${KERNEL_PKG_PERF}
 
 # Array of packages to be generated
 declare -A kern_pkgs
diff --git a/meta/recipes-kernel/linux/files/debian/isar/install.tmpl b/meta/recipes-kernel/linux/files/debian/isar/install.tmpl
index 6fa94508..e6badb2f 100644
--- a/meta/recipes-kernel/linux/files/debian/isar/install.tmpl
+++ b/meta/recipes-kernel/linux/files/debian/isar/install.tmpl
@@ -68,6 +68,9 @@ do_install() {
         install_dtbs
         install_kmods
         install_headers
+        if ! echo "${DEB_BUILD_PROFILES}" | grep -q "notools"; then
+            install_tools
+        fi
     fi
 
     # Stop tracing
@@ -137,6 +140,10 @@ install_dtbs() {
     ${MAKE} O=${O} INSTALL_DTBS_PATH=${deb_img_dir}/usr/lib/linux-image-${krel} dtbs_install
 }
 
+install_tools() {
+    install -Dm0755 ${O}/perf ${deb_perf_dir}/usr/bin/perf
+}
+
 install_kmods() {
     [ -n "${CONFIG_MODULES}" ] || return 0
     ${MAKE} O=${O} modules_install \
diff --git a/meta/recipes-kernel/linux/files/debian/rules.tmpl b/meta/recipes-kernel/linux/files/debian/rules.tmpl
index 598ae93f..a3b25396 100755
--- a/meta/recipes-kernel/linux/files/debian/rules.tmpl
+++ b/meta/recipes-kernel/linux/files/debian/rules.tmpl
@@ -45,4 +45,4 @@ override_dh_strip_nondeterminism:
 	true
 
 override_dh_strip:
-	unset DEB_HOST_GNU_TYPE && dh_strip -Xvmlinu --no-automatic-dbgsym
+	unset DEB_HOST_GNU_TYPE && dh_strip -Xvmlinu -Xperf --no-automatic-dbgsym
diff --git a/meta/recipes-kernel/linux/linux-custom.inc b/meta/recipes-kernel/linux/linux-custom.inc
index ccbea976..8d9846cd 100644
--- a/meta/recipes-kernel/linux/linux-custom.inc
+++ b/meta/recipes-kernel/linux/linux-custom.inc
@@ -169,6 +169,14 @@ RECIPE_PROVIDES:append:libcdev = " \
     linux-libc-dev-${DISTRO_ARCH}-cross \
 "
 
+# Set to "0" to disable the notools build profile and build the linux-perf package
+KERNEL_BUILD_NOTOOLS ??= "1"
+
+# Provide the linux-perf package if the notools build profile has not been enabled
+RECIPE_PROVIDES:append = " \
+    ${@ bb.utils.contains('DEB_BUILD_PROFILES', 'pkg.{}.notools'.format(d.getVar('BPN')), '', 'linux-perf-{}'.format(d.getVar('KERNEL_NAME_PROVIDED')), d)} \
+"
+
 # When cross-profile is active:
 # kbuild package is provided by -native or -kbuildtarget variant. Also headers
 # provisioning moves over to ensure those variants are pulled, although the
@@ -231,6 +239,8 @@ def get_additional_build_profiles(d):
         profiles += ' pkg.{}.nolibcdev'.format(d.getVar('BPN'))
     elif bb.utils.to_boolean(d.getVar('KERNEL_LIBC_DEV_ARCH_ALL')):
         profiles += ' pkg.{}.libcdev-arch-all'.format(d.getVar('BPN'))
+    if bb.utils.to_boolean(d.getVar('KERNEL_BUILD_NOTOOLS')):
+        profiles += ' pkg.{}.notools'.format(d.getVar('BPN'))
     return profiles
 
 KERNEL_LIBC_DEV_ARCH = "${@ bb.utils.contains('DEB_BUILD_PROFILES', 'pkg.{}.libcdev-arch-all'.format(d.getVar('BPN')), 'all\nMulti-Arch: foreign', 'any', d) }"

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