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-rw-r--r--drivers/base/arch_topology.c12
-rw-r--r--drivers/clocksource/arm_arch_timer.c18
-rw-r--r--drivers/cpufreq/cpufreq.c20
-rw-r--r--drivers/firmware/arm_sdei.c71
-rw-r--r--drivers/misc/lkdtm/bugs.c36
-rw-r--r--drivers/misc/lkdtm/core.c1
-rw-r--r--drivers/misc/lkdtm/lkdtm.h1
-rw-r--r--drivers/perf/arm-ccn.c20
-rw-r--r--drivers/perf/arm_spe_pmu.c2
9 files changed, 132 insertions, 49 deletions
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index e5d691cf824c..4d0a0038b476 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -21,6 +21,10 @@
#include <linux/sched.h>
#include <linux/smp.h>
+__weak bool arch_freq_counters_available(struct cpumask *cpus)
+{
+ return false;
+}
DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE;
void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
@@ -29,6 +33,14 @@ void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
unsigned long scale;
int i;
+ /*
+ * If the use of counters for FIE is enabled, just return as we don't
+ * want to update the scale factor with information from CPUFREQ.
+ * Instead the scale factor will be updated from arch_scale_freq_tick.
+ */
+ if (arch_freq_counters_available(cpus))
+ return;
+
scale = (cur_freq << SCHED_CAPACITY_SHIFT) / max_freq;
for_each_cpu(i, cpus)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index d53f4c7ccaae..2204a444e801 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -889,6 +889,17 @@ static int arch_timer_starting_cpu(unsigned int cpu)
return 0;
}
+static int validate_timer_rate(void)
+{
+ if (!arch_timer_rate)
+ return -EINVAL;
+
+ /* Arch timer frequency < 1MHz can cause trouble */
+ WARN_ON(arch_timer_rate < 1000000);
+
+ return 0;
+}
+
/*
* For historical reasons, when probing with DT we use whichever (non-zero)
* rate was probed first, and don't verify that others match. If the first node
@@ -904,7 +915,7 @@ static void arch_timer_of_configure_rate(u32 rate, struct device_node *np)
arch_timer_rate = rate;
/* Check the timer frequency. */
- if (arch_timer_rate == 0)
+ if (validate_timer_rate())
pr_warn("frequency not available\n");
}
@@ -1598,9 +1609,10 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table)
* CNTFRQ value. This *must* be correct.
*/
arch_timer_rate = arch_timer_get_cntfrq();
- if (!arch_timer_rate) {
+ ret = validate_timer_rate();
+ if (ret) {
pr_err(FW_BUG "frequency not available.\n");
- return -EINVAL;
+ return ret;
}
arch_timer_uses_ppi = arch_timer_select_ppi();
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 808874bccf4a..045f9fe157ce 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1733,6 +1733,26 @@ unsigned int cpufreq_quick_get_max(unsigned int cpu)
}
EXPORT_SYMBOL(cpufreq_quick_get_max);
+/**
+ * cpufreq_get_hw_max_freq - get the max hardware frequency of the CPU
+ * @cpu: CPU number
+ *
+ * The default return value is the max_freq field of cpuinfo.
+ */
+__weak unsigned int cpufreq_get_hw_max_freq(unsigned int cpu)
+{
+ struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+ unsigned int ret_freq = 0;
+
+ if (policy) {
+ ret_freq = policy->cpuinfo.max_freq;
+ cpufreq_cpu_put(policy);
+ }
+
+ return ret_freq;
+}
+EXPORT_SYMBOL(cpufreq_get_hw_max_freq);
+
static unsigned int __cpufreq_get(struct cpufreq_policy *policy)
{
if (unlikely(policy_is_inactive(policy)))
diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
index a479023fa036..334c8be0c11f 100644
--- a/drivers/firmware/arm_sdei.c
+++ b/drivers/firmware/arm_sdei.c
@@ -267,26 +267,19 @@ static struct sdei_event *sdei_event_create(u32 event_num,
event->private_registered = regs;
}
- if (sdei_event_find(event_num)) {
- kfree(event->registered);
- kfree(event);
- event = ERR_PTR(-EBUSY);
- } else {
- spin_lock(&sdei_list_lock);
- list_add(&event->list, &sdei_list);
- spin_unlock(&sdei_list_lock);
- }
+ spin_lock(&sdei_list_lock);
+ list_add(&event->list, &sdei_list);
+ spin_unlock(&sdei_list_lock);
return event;
}
-static void sdei_event_destroy(struct sdei_event *event)
+static void sdei_event_destroy_llocked(struct sdei_event *event)
{
lockdep_assert_held(&sdei_events_lock);
+ lockdep_assert_held(&sdei_list_lock);
- spin_lock(&sdei_list_lock);
list_del(&event->list);
- spin_unlock(&sdei_list_lock);
if (event->type == SDEI_EVENT_TYPE_SHARED)
kfree(event->registered);
@@ -296,6 +289,13 @@ static void sdei_event_destroy(struct sdei_event *event)
kfree(event);
}
+static void sdei_event_destroy(struct sdei_event *event)
+{
+ spin_lock(&sdei_list_lock);
+ sdei_event_destroy_llocked(event);
+ spin_unlock(&sdei_list_lock);
+}
+
static int sdei_api_get_version(u64 *version)
{
return invoke_sdei_fn(SDEI_1_0_FN_SDEI_VERSION, 0, 0, 0, 0, 0, version);
@@ -412,14 +412,19 @@ int sdei_event_enable(u32 event_num)
return -ENOENT;
}
- spin_lock(&sdei_list_lock);
- event->reenable = true;
- spin_unlock(&sdei_list_lock);
+ cpus_read_lock();
if (event->type == SDEI_EVENT_TYPE_SHARED)
err = sdei_api_event_enable(event->event_num);
else
err = sdei_do_cross_call(_local_event_enable, event);
+
+ if (!err) {
+ spin_lock(&sdei_list_lock);
+ event->reenable = true;
+ spin_unlock(&sdei_list_lock);
+ }
+ cpus_read_unlock();
mutex_unlock(&sdei_events_lock);
return err;
@@ -491,11 +496,6 @@ static int _sdei_event_unregister(struct sdei_event *event)
{
lockdep_assert_held(&sdei_events_lock);
- spin_lock(&sdei_list_lock);
- event->reregister = false;
- event->reenable = false;
- spin_unlock(&sdei_list_lock);
-
if (event->type == SDEI_EVENT_TYPE_SHARED)
return sdei_api_event_unregister(event->event_num);
@@ -518,6 +518,11 @@ int sdei_event_unregister(u32 event_num)
break;
}
+ spin_lock(&sdei_list_lock);
+ event->reregister = false;
+ event->reenable = false;
+ spin_unlock(&sdei_list_lock);
+
err = _sdei_event_unregister(event);
if (err)
break;
@@ -585,26 +590,15 @@ static int _sdei_event_register(struct sdei_event *event)
lockdep_assert_held(&sdei_events_lock);
- spin_lock(&sdei_list_lock);
- event->reregister = true;
- spin_unlock(&sdei_list_lock);
-
if (event->type == SDEI_EVENT_TYPE_SHARED)
return sdei_api_event_register(event->event_num,
sdei_entry_point,
event->registered,
SDEI_EVENT_REGISTER_RM_ANY, 0);
-
err = sdei_do_cross_call(_local_event_register, event);
- if (err) {
- spin_lock(&sdei_list_lock);
- event->reregister = false;
- event->reenable = false;
- spin_unlock(&sdei_list_lock);
-
+ if (err)
sdei_do_cross_call(_local_event_unregister, event);
- }
return err;
}
@@ -632,12 +626,18 @@ int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg)
break;
}
+ cpus_read_lock();
err = _sdei_event_register(event);
if (err) {
sdei_event_destroy(event);
pr_warn("Failed to register event %u: %d\n", event_num,
err);
+ } else {
+ spin_lock(&sdei_list_lock);
+ event->reregister = true;
+ spin_unlock(&sdei_list_lock);
}
+ cpus_read_unlock();
} while (0);
mutex_unlock(&sdei_events_lock);
@@ -645,16 +645,17 @@ int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg)
}
EXPORT_SYMBOL(sdei_event_register);
-static int sdei_reregister_event(struct sdei_event *event)
+static int sdei_reregister_event_llocked(struct sdei_event *event)
{
int err;
lockdep_assert_held(&sdei_events_lock);
+ lockdep_assert_held(&sdei_list_lock);
err = _sdei_event_register(event);
if (err) {
pr_err("Failed to re-register event %u\n", event->event_num);
- sdei_event_destroy(event);
+ sdei_event_destroy_llocked(event);
return err;
}
@@ -683,7 +684,7 @@ static int sdei_reregister_shared(void)
continue;
if (event->reregister) {
- err = sdei_reregister_event(event);
+ err = sdei_reregister_event_llocked(event);
if (err)
break;
}
diff --git a/drivers/misc/lkdtm/bugs.c b/drivers/misc/lkdtm/bugs.c
index de87693cf557..cc92bc3ed820 100644
--- a/drivers/misc/lkdtm/bugs.c
+++ b/drivers/misc/lkdtm/bugs.c
@@ -378,3 +378,39 @@ void lkdtm_DOUBLE_FAULT(void)
pr_err("XFAIL: this test is ia32-only\n");
#endif
}
+
+#ifdef CONFIG_ARM64_PTR_AUTH
+static noinline void change_pac_parameters(void)
+{
+ /* Reset the keys of current task */
+ ptrauth_thread_init_kernel(current);
+ ptrauth_thread_switch_kernel(current);
+}
+
+#define CORRUPT_PAC_ITERATE 10
+noinline void lkdtm_CORRUPT_PAC(void)
+{
+ int i;
+
+ if (!system_supports_address_auth()) {
+ pr_err("FAIL: arm64 pointer authentication feature not present\n");
+ return;
+ }
+
+ pr_info("Change the PAC parameters to force function return failure\n");
+ /*
+ * Pac is a hash value computed from input keys, return address and
+ * stack pointer. As pac has fewer bits so there is a chance of
+ * collision, so iterate few times to reduce the collision probability.
+ */
+ for (i = 0; i < CORRUPT_PAC_ITERATE; i++)
+ change_pac_parameters();
+
+ pr_err("FAIL: %s test failed. Kernel may be unstable from here\n", __func__);
+}
+#else /* !CONFIG_ARM64_PTR_AUTH */
+noinline void lkdtm_CORRUPT_PAC(void)
+{
+ pr_err("FAIL: arm64 pointer authentication config disabled\n");
+}
+#endif
diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c
index ee0d6e721441..5ce4ac8c06fc 100644
--- a/drivers/misc/lkdtm/core.c
+++ b/drivers/misc/lkdtm/core.c
@@ -116,6 +116,7 @@ static const struct crashtype crashtypes[] = {
CRASHTYPE(STACK_GUARD_PAGE_LEADING),
CRASHTYPE(STACK_GUARD_PAGE_TRAILING),
CRASHTYPE(UNSET_SMEP),
+ CRASHTYPE(CORRUPT_PAC),
CRASHTYPE(UNALIGNED_LOAD_STORE_WRITE),
CRASHTYPE(OVERWRITE_ALLOCATION),
CRASHTYPE(WRITE_AFTER_FREE),
diff --git a/drivers/misc/lkdtm/lkdtm.h b/drivers/misc/lkdtm/lkdtm.h
index c56d23e37643..8d13d0176624 100644
--- a/drivers/misc/lkdtm/lkdtm.h
+++ b/drivers/misc/lkdtm/lkdtm.h
@@ -31,6 +31,7 @@ void lkdtm_UNSET_SMEP(void);
#ifdef CONFIG_X86_32
void lkdtm_DOUBLE_FAULT(void);
#endif
+void lkdtm_CORRUPT_PAC(void);
/* lkdtm_heap.c */
void __init lkdtm_heap_init(void);
diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c
index fea354d6fb29..d50edef91f59 100644
--- a/drivers/perf/arm-ccn.c
+++ b/drivers/perf/arm-ccn.c
@@ -328,15 +328,15 @@ static ssize_t arm_ccn_pmu_event_show(struct device *dev,
struct arm_ccn_pmu_event, attr);
ssize_t res;
- res = snprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
+ res = scnprintf(buf, PAGE_SIZE, "type=0x%x", event->type);
if (event->event)
- res += snprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
+ res += scnprintf(buf + res, PAGE_SIZE - res, ",event=0x%x",
event->event);
if (event->def)
- res += snprintf(buf + res, PAGE_SIZE - res, ",%s",
+ res += scnprintf(buf + res, PAGE_SIZE - res, ",%s",
event->def);
if (event->mask)
- res += snprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
+ res += scnprintf(buf + res, PAGE_SIZE - res, ",mask=0x%x",
event->mask);
/* Arguments required by an event */
@@ -344,25 +344,25 @@ static ssize_t arm_ccn_pmu_event_show(struct device *dev,
case CCN_TYPE_CYCLES:
break;
case CCN_TYPE_XP:
- res += snprintf(buf + res, PAGE_SIZE - res,
+ res += scnprintf(buf + res, PAGE_SIZE - res,
",xp=?,vc=?");
if (event->event == CCN_EVENT_WATCHPOINT)
- res += snprintf(buf + res, PAGE_SIZE - res,
+ res += scnprintf(buf + res, PAGE_SIZE - res,
",port=?,dir=?,cmp_l=?,cmp_h=?,mask=?");
else
- res += snprintf(buf + res, PAGE_SIZE - res,
+ res += scnprintf(buf + res, PAGE_SIZE - res,
",bus=?");
break;
case CCN_TYPE_MN:
- res += snprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
+ res += scnprintf(buf + res, PAGE_SIZE - res, ",node=%d", ccn->mn_id);
break;
default:
- res += snprintf(buf + res, PAGE_SIZE - res, ",node=?");
+ res += scnprintf(buf + res, PAGE_SIZE - res, ",node=?");
break;
}
- res += snprintf(buf + res, PAGE_SIZE - res, "\n");
+ res += scnprintf(buf + res, PAGE_SIZE - res, "\n");
return res;
}
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index 4e4984a55cd1..b72c04852599 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -831,7 +831,7 @@ static void *arm_spe_pmu_setup_aux(struct perf_event *event, void **pages,
* parts and give userspace a fighting chance of getting some
* useful data out of it.
*/
- if (!nr_pages || (snapshot && (nr_pages & 1)))
+ if (snapshot && (nr_pages & 1))
return NULL;
if (cpu == -1)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 06:36:49 +0000