aboutsummaryrefslogtreecommitdiffstats
path: root/tools/power
diff options
context:
space:
mode:
authorThomas Renninger <trenn@suse.de>2014-05-13 10:41:43 (GMT)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-16 22:36:36 (GMT)
commit8a19cb586708361058e089b7c23b6f3eb33af6c6 (patch)
treea59cffe15d0efb00a4b1ce7fe73dfcc9fb1f3a79 /tools/power
parent84baab91772b5aeec9040cb33de6a46738b1aba8 (diff)
cpupower: If root, try to load msr driver on x86 if /dev/cpu/0/msr is not available
Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/power')
-rw-r--r--tools/power/cpupower/utils/cpupower.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/cpupower.c b/tools/power/cpupower/utils/cpupower.c
index 7efc570..7cdcf88 100644
--- a/tools/power/cpupower/utils/cpupower.c
+++ b/tools/power/cpupower/utils/cpupower.c
@@ -12,6 +12,9 @@
#include <string.h>
#include <unistd.h>
#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/utsname.h>
#include "builtin.h"
#include "helpers/helpers.h"
@@ -169,6 +172,8 @@ int main(int argc, const char *argv[])
{
const char *cmd;
unsigned int i, ret;
+ struct stat statbuf;
+ struct utsname uts;
cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF));
@@ -195,6 +200,15 @@ int main(int argc, const char *argv[])
get_cpu_info(0, &cpupower_cpu_info);
run_as_root = !getuid();
+ if (run_as_root) {
+ ret = uname(&uts);
+ if (!ret && !strcmp(uts.machine, "x86_64") &&
+ stat("/dev/cpu/0/msr", &statbuf) != 0) {
+ if (system("modprobe msr") == -1)
+ fprintf(stderr, _("MSR access not available.\n"));
+ }
+ }
+
for (i = 0; i < ARRAY_SIZE(commands); i++) {
struct cmd_struct *p = commands + i;

Privacy Policy