[Powerpc-utils-devel] [PATCH] add systemd unit (smt_off) to control smt status

[Paulo F. S. <pfs...@li...>]

This patch add a --with-systemd attribute to install a systemd unit
to turn smt on or off (permanently or not).

After it's installed you can use systemd commands like: status, start,
stop, enable and disable to control it.
---
 .gitignore                 |  1 +
 Makefile.am                | 11 +++++++++++
 configure.ac               | 18 +++++++++++++++++-
 systemd/smt_off.service.in | 12 ++++++++++++
 4 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 systemd/smt_off.service.in

diff --git a/.gitignore b/.gitignore
index c0348c7..15d072b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,6 +47,7 @@
 /src/Makefile.in
 /src/drmgr/Makefile
 /src/drmgr/Makefile.in
+/systemd/smt_off.service
 
 #
 # git files that we don't want to ignore even it they are dot-files
diff --git a/Makefile.am b/Makefile.am
index c302a54..3735a11 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -49,6 +49,10 @@ EXTRA_DIST += COPYRIGHT Changelog powerpc-utils.spec.in doc/activate_firmware.do
 	     doc/nvram.doxycfg doc/rtas_ibm_get_vpd.doxycfg doc/serv_config.doxycfg \
 	     doc/set_poweron_time.doxycfg doc/uesensor.doxycfg
 
+if WITH_SYSTEMD
+EXTRA_DIST += systemd/smt_off.service.in
+endif
+
 sbin_PROGRAMS += src/nvram src/lsprop src/lparstat src/ppc64_cpu
 
 pseries_platform_SOURCES = src/common/pseries_platform.c src/common/pseries_platform.h
@@ -145,3 +149,10 @@ src_drmgr_lsslot_SOURCES = \
 	$(pseries_platform_SOURCES)
 
 src_drmgr_lsslot_LDADD = -lrtas
+
+if WITH_SYSTEMD
+install-data-hook: systemd/smt_off.service
+	$(MKDIR_P) @prefix@${systemd_unit_dir}
+	$(INSTALL_SCRIPT) $< @prefix@${systemd_unit_dir}/
+	sed -i -e 's,$${exec_prefix},@sbindir@,g' @prefix@${systemd_unit_dir}/smt_off.service
+endif
diff --git a/configure.ac b/configure.ac
index f7fcd55..7fa5b01 100644
--- a/configure.ac
+++ b/configure.ac
@@ -58,6 +58,22 @@ AS_IF([test "x$with_librtas" != "xno"],
 
 AM_CONDITIONAL([WITH_LIBRTAS], [test "x$with_librtas" = "xyes"])
 
+# check for systemd
+systemd_unit_dir=/usr/lib/systemd/system
+AC_ARG_WITH([systemd],
+	[AC_HELP_STRING([--with-systemd@<:@=DIR@:>@],
+                    [install systemd unit files (not default and unit dir is /usr/lib/systemd/system)])],
+	[if test "$withval" = "no"; then
+		with_systemd=0
+	else
+		with_systemd=1
+		test $withval != "yes" && systemd_unit_dir=$withval
+	fi],
+	with_systemd=0
+	)
+AM_CONDITIONAL(WITH_SYSTEMD, [test "$with_systemd" = 1])
+AC_SUBST(systemd_unit_dir)
+
 AC_DEFUN([LOCAL_CHECK_FLAGS],[
   AC_REQUIRE([AX_CHECK_LINK_FLAG])
   AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
@@ -72,5 +88,5 @@ AC_DEFUN([LOCAL_CHECK_FLAGS],[
 ])
 LOCAL_CHECK_FLAGS
 
-AC_CONFIG_FILES([Makefile powerpc-utils.spec])
+AC_CONFIG_FILES([Makefile powerpc-utils.spec systemd/smt_off.service])
 AC_OUTPUT
diff --git a/systemd/smt_off.service.in b/systemd/smt_off.service.in
new file mode 100644
index 0000000..ed95945
--- /dev/null
+++ b/systemd/smt_off.service.in
@@ -0,0 +1,12 @@
+[Unit]
+Description=ppc64 set SMT off
+Before=libvirt-bin.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=true
+ExecStart=@sbindir@/ppc64_cpu --smt=off
+ExecStop=@sbindir@/ppc64_cpu --smt=on
+
+[Install]
+WantedBy=multi-user.target
-- 
2.1.0


-- 
Paulo Flabiano Smorigo
IBM Linux Technology Center