Update Linux to v5.4.148
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.148.tar.gz
Change-Id: Ib3d26c5ba9b022e2e03533005c4fed4d7c30b61b
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 5d0fddd..988326b 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -30,7 +30,7 @@
#include <sched.h>
#include <time.h>
#include <cpuid.h>
-#include <linux/capability.h>
+#include <sys/capability.h>
#include <errno.h>
#include <math.h>
@@ -304,6 +304,10 @@
void setup_all_buffers(void);
+char *sys_lpi_file;
+char *sys_lpi_file_sysfs = "/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us";
+char *sys_lpi_file_debugfs = "/sys/kernel/debug/pmc_core/slp_s0_residency_usec";
+
int cpu_is_not_present(int cpu)
{
return !CPU_ISSET_S(cpu, cpu_present_setsize, cpu_present_set);
@@ -2916,8 +2920,6 @@
*
* record snapshot of
* /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us
- *
- * return 1 if config change requires a restart, else return 0
*/
int snapshot_cpu_lpi_us(void)
{
@@ -2941,17 +2943,14 @@
/*
* snapshot_sys_lpi()
*
- * record snapshot of
- * /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us
- *
- * return 1 if config change requires a restart, else return 0
+ * record snapshot of sys_lpi_file
*/
int snapshot_sys_lpi_us(void)
{
FILE *fp;
int retval;
- fp = fopen_or_die("/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us", "r");
+ fp = fopen_or_die(sys_lpi_file, "r");
retval = fscanf(fp, "%lld", &cpuidle_cur_sys_lpi_us);
if (retval != 1) {
@@ -3151,27 +3150,41 @@
err(-5, "no /dev/cpu/0/msr, Try \"# modprobe msr\" ");
}
-void check_permissions()
+/*
+ * check for CAP_SYS_RAWIO
+ * return 0 on success
+ * return 1 on fail
+ */
+int check_for_cap_sys_rawio(void)
{
- struct __user_cap_header_struct cap_header_data;
- cap_user_header_t cap_header = &cap_header_data;
- struct __user_cap_data_struct cap_data_data;
- cap_user_data_t cap_data = &cap_data_data;
- extern int capget(cap_user_header_t hdrp, cap_user_data_t datap);
+ cap_t caps;
+ cap_flag_value_t cap_flag_value;
+
+ caps = cap_get_proc();
+ if (caps == NULL)
+ err(-6, "cap_get_proc\n");
+
+ if (cap_get_flag(caps, CAP_SYS_RAWIO, CAP_EFFECTIVE, &cap_flag_value))
+ err(-6, "cap_get\n");
+
+ if (cap_flag_value != CAP_SET) {
+ warnx("capget(CAP_SYS_RAWIO) failed,"
+ " try \"# setcap cap_sys_rawio=ep %s\"", progname);
+ return 1;
+ }
+
+ if (cap_free(caps) == -1)
+ err(-6, "cap_free\n");
+
+ return 0;
+}
+void check_permissions(void)
+{
int do_exit = 0;
char pathname[32];
/* check for CAP_SYS_RAWIO */
- cap_header->pid = getpid();
- cap_header->version = _LINUX_CAPABILITY_VERSION;
- if (capget(cap_header, cap_data) < 0)
- err(-6, "capget(2) failed");
-
- if ((cap_data->effective & (1 << CAP_SYS_RAWIO)) == 0) {
- do_exit++;
- warnx("capget(CAP_SYS_RAWIO) failed,"
- " try \"# setcap cap_sys_rawio=ep %s\"", progname);
- }
+ do_exit += check_for_cap_sys_rawio();
/* test file permissions */
sprintf(pathname, "/dev/cpu/%d/msr", base_cpu);
@@ -4907,10 +4920,16 @@
else
BIC_NOT_PRESENT(BIC_CPU_LPI);
- if (!access("/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us", R_OK))
+ if (!access(sys_lpi_file_sysfs, R_OK)) {
+ sys_lpi_file = sys_lpi_file_sysfs;
BIC_PRESENT(BIC_SYS_LPI);
- else
+ } else if (!access(sys_lpi_file_debugfs, R_OK)) {
+ sys_lpi_file = sys_lpi_file_debugfs;
+ BIC_PRESENT(BIC_SYS_LPI);
+ } else {
+ sys_lpi_file_sysfs = NULL;
BIC_NOT_PRESENT(BIC_SYS_LPI);
+ }
if (!quiet)
decode_misc_feature_control();
@@ -5323,9 +5342,9 @@
}
msrp->msr_num = msr_num;
- strncpy(msrp->name, name, NAME_BYTES);
+ strncpy(msrp->name, name, NAME_BYTES - 1);
if (path)
- strncpy(msrp->path, path, PATH_BYTES);
+ strncpy(msrp->path, path, PATH_BYTES - 1);
msrp->width = width;
msrp->type = type;
msrp->format = format;