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>
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@ -12,6 +12,9 @@
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/utsname.h>
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#include "builtin.h"
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#include "helpers/helpers.h"
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@ -169,6 +172,8 @@ int main(int argc, const char *argv[])
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{
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const char *cmd;
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unsigned int i, ret;
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struct stat statbuf;
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struct utsname uts;
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cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF));
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@ -195,6 +200,15 @@ int main(int argc, const char *argv[])
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get_cpu_info(0, &cpupower_cpu_info);
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run_as_root = !getuid();
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if (run_as_root) {
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ret = uname(&uts);
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if (!ret && !strcmp(uts.machine, "x86_64") &&
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stat("/dev/cpu/0/msr", &statbuf) != 0) {
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if (system("modprobe msr") == -1)
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fprintf(stderr, _("MSR access not available.\n"));
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}
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}
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for (i = 0; i < ARRAY_SIZE(commands); i++) {
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struct cmd_struct *p = commands + i;
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