cpupower: If root, try to load msr driver on x86 if /dev/cpu/0/msr is not available (8a19cb58) · Commits · e / devices / android_kernel_xiaomi_markw

tools/power/cpupower/utils/cpupower.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -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;