inline static void target_freq(struct cpufreq_policy *policy,
struct greenmax_info_s *this_greenmax, int new_freq, int old_freq,
int prefered_relation) {
int index, target;
struct cpufreq_frequency_table *table = this_greenmax->freq_table;
unsigned int cpu = this_greenmax->cpu;
dprintk(GREENMAX_DEBUG_ALG, "%d: %s\n", old_freq, __func__);
// apply policy limits - just to be sure
new_freq = validate_freq(policy, new_freq);
if (!cpufreq_frequency_table_target(policy, table, new_freq,
prefered_relation, &index)) {
target = table[index].frequency;
if (target == old_freq) {
// if for example we are ramping up to *at most* current + ramp_up_step
// but there is no such frequency higher than the current, try also
// to ramp up to *at least* current + ramp_up_step.
if (new_freq > old_freq && prefered_relation == CPUFREQ_RELATION_H
&& !cpufreq_frequency_table_target(policy, table, new_freq,
CPUFREQ_RELATION_L, &index))
target = table[index].frequency;
// simlarly for ramping down:
else if (new_freq < old_freq
&& prefered_relation == CPUFREQ_RELATION_L
&& !cpufreq_frequency_table_target(policy, table, new_freq,
CPUFREQ_RELATION_H, &index))
target = table[index].frequency;
}
// no change
if (target == old_freq)
return;
} else {
dprintk(GREENMAX_DEBUG_ALG, "frequency change failed\n");
return;
}
dprintk(GREENMAX_DEBUG_JUMPS, "%d: jumping to %d (%d) cpu %d\n", old_freq, new_freq, target, cpu);
__cpufreq_driver_target(policy, target, prefered_relation);
// remember last time we changed frequency
this_greenmax->freq_change_time = ktime_to_us(ktime_get());
}
static int
set_parameters(struct quadd_parameters *p, uid_t *debug_app_uid)
{
int i, err, uid = 0;
int pmu_events_id[QUADD_MAX_COUNTERS];
int pl310_events_id;
int nr_pmu = 0, nr_pl310 = 0;
struct task_struct *task;
unsigned int extra;
u64 *low_addr_p;
if (!validate_freq(p->freq)) {
pr_err("%s: incorrect frequency: %u\n", __func__, p->freq);
return -EINVAL;
}
ctx.param.freq = p->freq;
ctx.param.ma_freq = p->ma_freq;
ctx.param.backtrace = p->backtrace;
ctx.param.use_freq = p->use_freq;
ctx.param.system_wide = p->system_wide;
ctx.param.power_rate_freq = p->power_rate_freq;
ctx.param.debug_samples = p->debug_samples;
for (i = 0; i < ARRAY_SIZE(p->reserved); i++)
ctx.param.reserved[i] = p->reserved[i];
/* Currently only one process */
if (p->nr_pids != 1)
return -EINVAL;
p->package_name[sizeof(p->package_name) - 1] = '\0';
rcu_read_lock();
task = pid_task(find_vpid(p->pids[0]), PIDTYPE_PID);
rcu_read_unlock();
if (!task) {
pr_err("Process not found: %u\n", p->pids[0]);
return -ESRCH;
}
pr_info("owner/task uids: %u/%u\n", current_fsuid(), task_uid(task));
if (!capable(CAP_SYS_ADMIN)) {
if (current_fsuid() != task_uid(task)) {
uid = quadd_auth_is_debuggable((char *)p->package_name);
if (uid < 0) {
pr_err("Error: QuadD security service\n");
return uid;
} else if (uid == 0) {
pr_err("Error: app is not debuggable\n");
return -EACCES;
}
*debug_app_uid = uid;
pr_info("debug_app_uid: %u\n", uid);
}
ctx.collect_kernel_ips = 0;
} else {
ctx.collect_kernel_ips = 1;
}
for (i = 0; i < p->nr_pids; i++)
ctx.param.pids[i] = p->pids[i];
ctx.param.nr_pids = p->nr_pids;
for (i = 0; i < p->nr_events; i++) {
int event = p->events[i];
if (ctx.pmu && ctx.pmu_info.nr_supported_events > 0
&& is_event_supported(&ctx.pmu_info, event)) {
pmu_events_id[nr_pmu++] = p->events[i];
pr_info("PMU active event: %s\n",
quadd_get_event_str(event));
} else if (ctx.pl310 &&
ctx.pl310_info.nr_supported_events > 0 &&
is_event_supported(&ctx.pl310_info, event)) {
pl310_events_id = p->events[i];
pr_info("PL310 active event: %s\n",
quadd_get_event_str(event));
if (nr_pl310++ > 1) {
pr_err("error: multiply pl310 events\n");
return -EINVAL;
}
} else {
pr_err("Bad event: %s\n",
quadd_get_event_str(event));
return -EINVAL;
}
}
if (ctx.pmu) {
if (nr_pmu > 0) {
err = ctx.pmu->set_events(pmu_events_id, nr_pmu);
if (err) {
pr_err("PMU set parameters: error\n");
return err;
}
ctx.pmu_info.active = 1;
} else {
ctx.pmu_info.active = 0;
ctx.pmu->set_events(NULL, 0);
}
}
if (ctx.pl310) {
if (nr_pl310 == 1) {
err = ctx.pl310->set_events(&pl310_events_id, 1);
if (err) {
pr_info("pl310 set_parameters: error\n");
return err;
}
ctx.pl310_info.active = 1;
} else {
ctx.pl310_info.active = 0;
ctx.pl310->set_events(NULL, 0);
}
}
extra = p->reserved[QUADD_PARAM_IDX_EXTRA];
if (extra & QUADD_PARAM_EXTRA_BT_UNWIND_TABLES)
pr_info("unwinding: exception-handling tables\n");
if (extra & QUADD_PARAM_EXTRA_BT_FP)
pr_info("unwinding: frame pointers\n");
if (extra & QUADD_PARAM_EXTRA_BT_MIXED)
pr_info("unwinding: mixed mode\n");
low_addr_p = (u64 *)&p->reserved[QUADD_PARAM_IDX_BT_LOWER_BOUND];
ctx.hrt->low_addr = (unsigned long)*low_addr_p;
pr_info("bt lower bound: %#lx\n", ctx.hrt->low_addr);
err = quadd_unwind_start(task);
if (err)
return err;
pr_info("New parameters have been applied\n");
return 0;
}