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Diffstat (limited to 'drivers/acpi/processor_throttling.c')
-rw-r--r--drivers/acpi/processor_throttling.c349
1 files changed, 161 insertions, 188 deletions
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index e7dd2c1fee79..f9c2bc1d4a3a 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* processor_throttling.c - Throttling submodule of the ACPI processor driver
*
@@ -5,46 +6,24 @@
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (C) 2004 Dominik Brodowski <linux@brodo.de>
* Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
- * - Added processor hotplug support
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * - Added processor hotplug support
*/
+#define pr_fmt(fmt) "ACPI: " fmt
+
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/cpufreq.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#include <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
+#include <linux/acpi.h>
+#include <linux/uaccess.h>
#include <acpi/processor.h>
-
-#define PREFIX "ACPI: "
-
-#define ACPI_PROCESSOR_CLASS "processor"
-#define _COMPONENT ACPI_PROCESSOR_COMPONENT
-ACPI_MODULE_NAME("processor_throttling");
+#include <asm/io.h>
+#ifdef CONFIG_X86
+#include <asm/msr.h>
+#endif
/* ignore_tpc:
* 0 -> acpi processor driver doesn't ignore _TPC values
@@ -59,16 +38,22 @@ struct throttling_tstate {
int target_state; /* target T-state */
};
+struct acpi_processor_throttling_arg {
+ struct acpi_processor *pr;
+ int target_state;
+ bool force;
+};
+
#define THROTTLING_PRECHANGE (1)
#define THROTTLING_POSTCHANGE (2)
static int acpi_processor_get_throttling(struct acpi_processor *pr);
-int acpi_processor_set_throttling(struct acpi_processor *pr,
- int state, bool force);
+static int __acpi_processor_set_throttling(struct acpi_processor *pr,
+ int state, bool force, bool direct);
static int acpi_processor_update_tsd_coord(void)
{
- int count, count_target;
+ int count_target;
int retval = 0;
unsigned int i, j;
cpumask_var_t covered_cpus;
@@ -125,7 +110,6 @@ static int acpi_processor_update_tsd_coord(void)
/* Validate the Domain info */
count_target = pdomain->num_processors;
- count = 1;
for_each_possible_cpu(j) {
if (i == j)
@@ -158,7 +142,6 @@ static int acpi_processor_update_tsd_coord(void)
cpumask_set_cpu(j, covered_cpus);
cpumask_set_cpu(j, pthrottling->shared_cpu_map);
- count++;
}
for_each_possible_cpu(j) {
if (i == j)
@@ -211,19 +194,15 @@ err_ret:
*/
void acpi_processor_throttling_init(void)
{
- if (acpi_processor_update_tsd_coord()) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Assume no T-state coordination\n"));
- }
-
- return;
+ if (acpi_processor_update_tsd_coord())
+ pr_debug("Assume no T-state coordination\n");
}
static int acpi_processor_throttling_notifier(unsigned long event, void *data)
{
struct throttling_tstate *p_tstate = data;
struct acpi_processor *pr;
- unsigned int cpu ;
+ unsigned int cpu;
int target_state;
struct acpi_processor_limit *p_limit;
struct acpi_processor_throttling *p_throttling;
@@ -231,12 +210,13 @@ static int acpi_processor_throttling_notifier(unsigned long event, void *data)
cpu = p_tstate->cpu;
pr = per_cpu(processors, cpu);
if (!pr) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Invalid pr pointer\n"));
+ pr_debug("Invalid pr pointer\n");
return 0;
}
if (!pr->flags.throttling) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Throttling control is "
- "unsupported on CPU %d\n", cpu));
+ acpi_handle_debug(pr->handle,
+ "Throttling control unsupported on CPU %d\n",
+ cpu);
return 0;
}
target_state = p_tstate->target_state;
@@ -255,14 +235,13 @@ static int acpi_processor_throttling_notifier(unsigned long event, void *data)
if (pr->throttling_platform_limit > target_state)
target_state = pr->throttling_platform_limit;
if (target_state >= p_throttling->state_count) {
- printk(KERN_WARNING
- "Exceed the limit of T-state \n");
+ pr_warn("Exceed the limit of T-state\n");
target_state = p_throttling->state_count - 1;
}
p_tstate->target_state = target_state;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PreChange Event:"
- "target T-state of CPU %d is T%d\n",
- cpu, target_state));
+ acpi_handle_debug(pr->handle,
+ "PreChange Event: target T-state of CPU %d is T%d\n",
+ cpu, target_state);
break;
case THROTTLING_POSTCHANGE:
/*
@@ -270,13 +249,12 @@ static int acpi_processor_throttling_notifier(unsigned long event, void *data)
* T-state flag of acpi_processor_throttling.
*/
p_throttling->state = target_state;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PostChange Event:"
- "CPU %d is switched to T%d\n",
- cpu, target_state));
+ acpi_handle_debug(pr->handle,
+ "PostChange Event: CPU %d is switched to T%d\n",
+ cpu, target_state);
break;
default:
- printk(KERN_WARNING
- "Unsupported Throttling notifier event\n");
+ pr_warn("Unsupported Throttling notifier event\n");
break;
}
@@ -299,9 +277,9 @@ static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
status = acpi_evaluate_integer(pr->handle, "_TPC", NULL, &tpc);
if (ACPI_FAILURE(status)) {
- if (status != AE_NOT_FOUND) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TPC"));
- }
+ if (status != AE_NOT_FOUND)
+ acpi_evaluation_failure_warn(pr->handle, "_TPC", status);
+
return -ENODEV;
}
@@ -376,11 +354,11 @@ int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
* 3. TSD domain
*/
void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
- unsigned long action)
+ bool is_dead)
{
int result = 0;
- if (action == CPU_DEAD) {
+ if (is_dead) {
/* When one CPU is offline, the T-state throttling
* will be invalidated.
*/
@@ -427,21 +405,21 @@ static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
acpi_status status = 0;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *ptc = NULL;
- union acpi_object obj = { 0 };
+ union acpi_object obj;
struct acpi_processor_throttling *throttling;
status = acpi_evaluate_object(pr->handle, "_PTC", NULL, &buffer);
if (ACPI_FAILURE(status)) {
- if (status != AE_NOT_FOUND) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PTC"));
- }
+ if (status != AE_NOT_FOUND)
+ acpi_evaluation_failure_warn(pr->handle, "_PTC", status);
+
return -ENODEV;
}
ptc = (union acpi_object *)buffer.pointer;
if (!ptc || (ptc->type != ACPI_TYPE_PACKAGE)
|| (ptc->package.count != 2)) {
- printk(KERN_ERR PREFIX "Invalid _PTC data\n");
+ pr_err("Invalid _PTC data\n");
result = -EFAULT;
goto end;
}
@@ -455,8 +433,7 @@ static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
if ((obj.type != ACPI_TYPE_BUFFER)
|| (obj.buffer.length < sizeof(struct acpi_ptc_register))
|| (obj.buffer.pointer == NULL)) {
- printk(KERN_ERR PREFIX
- "Invalid _PTC data (control_register)\n");
+ pr_err("Invalid _PTC data (control_register)\n");
result = -EFAULT;
goto end;
}
@@ -472,7 +449,7 @@ static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
if ((obj.type != ACPI_TYPE_BUFFER)
|| (obj.buffer.length < sizeof(struct acpi_ptc_register))
|| (obj.buffer.pointer == NULL)) {
- printk(KERN_ERR PREFIX "Invalid _PTC data (status_register)\n");
+ pr_err("Invalid _PTC data (status_register)\n");
result = -EFAULT;
goto end;
}
@@ -484,19 +461,19 @@ static int acpi_processor_get_throttling_control(struct acpi_processor *pr)
if ((throttling->control_register.bit_width +
throttling->control_register.bit_offset) > 32) {
- printk(KERN_ERR PREFIX "Invalid _PTC control register\n");
+ pr_err("Invalid _PTC control register\n");
result = -EFAULT;
goto end;
}
if ((throttling->status_register.bit_width +
throttling->status_register.bit_offset) > 32) {
- printk(KERN_ERR PREFIX "Invalid _PTC status register\n");
+ pr_err("Invalid _PTC status register\n");
result = -EFAULT;
goto end;
}
- end:
+end:
kfree(buffer.pointer);
return result;
@@ -517,26 +494,27 @@ static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
status = acpi_evaluate_object(pr->handle, "_TSS", NULL, &buffer);
if (ACPI_FAILURE(status)) {
- if (status != AE_NOT_FOUND) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSS"));
- }
+ if (status != AE_NOT_FOUND)
+ acpi_evaluation_failure_warn(pr->handle, "_TSS", status);
+
return -ENODEV;
}
tss = buffer.pointer;
if (!tss || (tss->type != ACPI_TYPE_PACKAGE)) {
- printk(KERN_ERR PREFIX "Invalid _TSS data\n");
+ pr_err("Invalid _TSS data\n");
result = -EFAULT;
goto end;
}
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d throttling states\n",
- tss->package.count));
+ acpi_handle_debug(pr->handle, "Found %d throttling states\n",
+ tss->package.count);
pr->throttling.state_count = tss->package.count;
pr->throttling.states_tss =
- kmalloc(sizeof(struct acpi_processor_tx_tss) * tss->package.count,
- GFP_KERNEL);
+ kmalloc_array(tss->package.count,
+ sizeof(struct acpi_processor_tx_tss),
+ GFP_KERNEL);
if (!pr->throttling.states_tss) {
result = -ENOMEM;
goto end;
@@ -551,27 +529,27 @@ static int acpi_processor_get_throttling_states(struct acpi_processor *pr)
state.length = sizeof(struct acpi_processor_tx_tss);
state.pointer = tx;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Extracting state %d\n", i));
+ acpi_handle_debug(pr->handle, "Extracting state %d\n", i);
status = acpi_extract_package(&(tss->package.elements[i]),
&format, &state);
if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status, "Invalid _TSS data"));
+ acpi_handle_warn(pr->handle, "Invalid _TSS data: %s\n",
+ acpi_format_exception(status));
result = -EFAULT;
kfree(pr->throttling.states_tss);
goto end;
}
if (!tx->freqpercentage) {
- printk(KERN_ERR PREFIX
- "Invalid _TSS data: freq is zero\n");
+ pr_err("Invalid _TSS data: freq is zero\n");
result = -EFAULT;
kfree(pr->throttling.states_tss);
goto end;
}
}
- end:
+end:
kfree(buffer.pointer);
return result;
@@ -596,21 +574,21 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer);
if (ACPI_FAILURE(status)) {
- if (status != AE_NOT_FOUND) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _TSD"));
- }
+ if (status != AE_NOT_FOUND)
+ acpi_evaluation_failure_warn(pr->handle, "_TSD", status);
+
return -ENODEV;
}
tsd = buffer.pointer;
if (!tsd || (tsd->type != ACPI_TYPE_PACKAGE)) {
- printk(KERN_ERR PREFIX "Invalid _TSD data\n");
+ pr_err("Invalid _TSD data\n");
result = -EFAULT;
goto end;
}
if (tsd->package.count != 1) {
- printk(KERN_ERR PREFIX "Invalid _TSD data\n");
+ pr_err("Invalid _TSD data\n");
result = -EFAULT;
goto end;
}
@@ -623,19 +601,19 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
status = acpi_extract_package(&(tsd->package.elements[0]),
&format, &state);
if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX "Invalid _TSD data\n");
+ pr_err("Invalid _TSD data\n");
result = -EFAULT;
goto end;
}
if (pdomain->num_entries != ACPI_TSD_REV0_ENTRIES) {
- printk(KERN_ERR PREFIX "Unknown _TSD:num_entries\n");
+ pr_err("Unknown _TSD:num_entries\n");
result = -EFAULT;
goto end;
}
if (pdomain->revision != ACPI_TSD_REV0_REVISION) {
- printk(KERN_ERR PREFIX "Unknown _TSD:revision\n");
+ pr_err("Unknown _TSD:revision\n");
result = -EFAULT;
goto end;
}
@@ -656,7 +634,7 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
}
- end:
+end:
kfree(buffer.pointer);
return result;
}
@@ -677,6 +655,15 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
if (!pr->flags.throttling)
return -ENODEV;
+ /*
+ * We don't care about error returns - we just try to mark
+ * these reserved so that nobody else is confused into thinking
+ * that this region might be unused..
+ *
+ * (In particular, allocating the IO range for Cardbus)
+ */
+ request_region(pr->throttling.address, 6, "ACPI CPU throttle");
+
pr->throttling.state = 0;
duty_mask = pr->throttling.state_count - 1;
@@ -703,9 +690,9 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
local_irq_enable();
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ acpi_handle_debug(pr->handle,
"Throttling state is T%d (%d%% throttling applied)\n",
- state, pr->throttling.states[state].performance));
+ state, pr->throttling.states[state].performance);
return 0;
}
@@ -719,13 +706,12 @@ static int acpi_throttling_rdmsr(u64 *value)
if ((this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_INTEL) ||
!this_cpu_has(X86_FEATURE_ACPI)) {
- printk(KERN_ERR PREFIX
- "HARDWARE addr space,NOT supported yet\n");
+ pr_err("HARDWARE addr space,NOT supported yet\n");
} else {
msr_low = 0;
msr_high = 0;
rdmsr_safe(MSR_IA32_THERM_CONTROL,
- (u32 *)&msr_low , (u32 *) &msr_high);
+ (u32 *)&msr_low, (u32 *) &msr_high);
msr = (msr_high << 32) | msr_low;
*value = (u64) msr;
ret = 0;
@@ -740,8 +726,7 @@ static int acpi_throttling_wrmsr(u64 value)
if ((this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_INTEL) ||
!this_cpu_has(X86_FEATURE_ACPI)) {
- printk(KERN_ERR PREFIX
- "HARDWARE addr space,NOT supported yet\n");
+ pr_err("HARDWARE addr space,NOT supported yet\n");
} else {
msr = value;
wrmsr_safe(MSR_IA32_THERM_CONTROL,
@@ -753,15 +738,13 @@ static int acpi_throttling_wrmsr(u64 value)
#else
static int acpi_throttling_rdmsr(u64 *value)
{
- printk(KERN_ERR PREFIX
- "HARDWARE addr space,NOT supported yet\n");
+ pr_err("HARDWARE addr space,NOT supported yet\n");
return -1;
}
static int acpi_throttling_wrmsr(u64 value)
{
- printk(KERN_ERR PREFIX
- "HARDWARE addr space,NOT supported yet\n");
+ pr_err("HARDWARE addr space,NOT supported yet\n");
return -1;
}
#endif
@@ -792,7 +775,7 @@ static int acpi_read_throttling_status(struct acpi_processor *pr,
ret = acpi_throttling_rdmsr(value);
break;
default:
- printk(KERN_ERR PREFIX "Unknown addr space %d\n",
+ pr_err("Unknown addr space %d\n",
(u32) (throttling->status_register.space_id));
}
return ret;
@@ -825,7 +808,7 @@ static int acpi_write_throttling_state(struct acpi_processor *pr,
ret = acpi_throttling_wrmsr(value);
break;
default:
- printk(KERN_ERR PREFIX "Unknown addr space %d\n",
+ pr_err("Unknown addr space %d\n",
(u32) (throttling->control_register.space_id));
}
return ret;
@@ -880,10 +863,11 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
if (ret >= 0) {
state = acpi_get_throttling_state(pr, value);
if (state == -1) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Invalid throttling state, reset\n"));
+ acpi_handle_debug(pr->handle,
+ "Invalid throttling state, reset\n");
state = 0;
- ret = acpi_processor_set_throttling(pr, state, true);
+ ret = __acpi_processor_set_throttling(pr, state, true,
+ true);
if (ret)
return ret;
}
@@ -893,36 +877,31 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
return 0;
}
-static int acpi_processor_get_throttling(struct acpi_processor *pr)
+static long __acpi_processor_get_throttling(void *data)
{
- cpumask_var_t saved_mask;
- int ret;
+ struct acpi_processor *pr = data;
+
+ return pr->throttling.acpi_processor_get_throttling(pr);
+}
+static int acpi_processor_get_throttling(struct acpi_processor *pr)
+{
if (!pr)
return -EINVAL;
if (!pr->flags.throttling)
return -ENODEV;
- if (!alloc_cpumask_var(&saved_mask, GFP_KERNEL))
- return -ENOMEM;
-
/*
- * Migrate task to the cpu pointed by pr.
+ * This is either called from the CPU hotplug callback of
+ * processor_driver or via the ACPI probe function. In the latter
+ * case the CPU is not guaranteed to be online. Both call sites are
+ * protected against CPU hotplug.
*/
- cpumask_copy(saved_mask, &current->cpus_allowed);
- /* FIXME: use work_on_cpu() */
- if (set_cpus_allowed_ptr(current, cpumask_of(pr->id))) {
- /* Can't migrate to the target pr->id CPU. Exit */
- free_cpumask_var(saved_mask);
+ if (!cpu_online(pr->id))
return -ENODEV;
- }
- ret = pr->throttling.acpi_processor_get_throttling(pr);
- /* restore the previous state */
- set_cpus_allowed_ptr(current, saved_mask);
- free_cpumask_var(saved_mask);
- return ret;
+ return call_on_cpu(pr->id, __acpi_processor_get_throttling, pr, false);
}
static int acpi_processor_get_fadt_info(struct acpi_processor *pr)
@@ -930,15 +909,15 @@ static int acpi_processor_get_fadt_info(struct acpi_processor *pr)
int i, step;
if (!pr->throttling.address) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling register\n"));
+ acpi_handle_debug(pr->handle, "No throttling register\n");
return -EINVAL;
} else if (!pr->throttling.duty_width) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No throttling states\n"));
+ acpi_handle_debug(pr->handle, "No throttling states\n");
return -EINVAL;
}
/* TBD: Support duty_cycle values that span bit 4. */
else if ((pr->throttling.duty_offset + pr->throttling.duty_width) > 4) {
- printk(KERN_WARNING PREFIX "duty_cycle spans bit 4\n");
+ pr_warn("duty_cycle spans bit 4\n");
return -EINVAL;
}
@@ -1024,10 +1003,10 @@ static int acpi_processor_set_throttling_fadt(struct acpi_processor *pr,
local_irq_enable();
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ acpi_handle_debug(pr->handle,
"Throttling state set to T%d (%d%%)\n", state,
(pr->throttling.states[state].performance ? pr->
- throttling.states[state].performance / 10 : 0)));
+ throttling.states[state].performance / 10 : 0));
return 0;
}
@@ -1063,16 +1042,24 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
return 0;
}
-int acpi_processor_set_throttling(struct acpi_processor *pr,
- int state, bool force)
+static long acpi_processor_throttling_fn(void *data)
+{
+ struct acpi_processor_throttling_arg *arg = data;
+ struct acpi_processor *pr = arg->pr;
+
+ return pr->throttling.acpi_processor_set_throttling(pr,
+ arg->target_state, arg->force);
+}
+
+static int __acpi_processor_set_throttling(struct acpi_processor *pr,
+ int state, bool force, bool direct)
{
- cpumask_var_t saved_mask;
int ret = 0;
unsigned int i;
struct acpi_processor *match_pr;
struct acpi_processor_throttling *p_throttling;
+ struct acpi_processor_throttling_arg arg;
struct throttling_tstate t_state;
- cpumask_var_t online_throttling_cpus;
if (!pr)
return -EINVAL;
@@ -1083,14 +1070,6 @@ int acpi_processor_set_throttling(struct acpi_processor *pr,
if ((state < 0) || (state > (pr->throttling.state_count - 1)))
return -EINVAL;
- if (!alloc_cpumask_var(&saved_mask, GFP_KERNEL))
- return -ENOMEM;
-
- if (!alloc_cpumask_var(&online_throttling_cpus, GFP_KERNEL)) {
- free_cpumask_var(saved_mask);
- return -ENOMEM;
- }
-
if (cpu_is_offline(pr->id)) {
/*
* the cpu pointed by pr->id is offline. Unnecessary to change
@@ -1099,17 +1078,15 @@ int acpi_processor_set_throttling(struct acpi_processor *pr,
return -ENODEV;
}
- cpumask_copy(saved_mask, &current->cpus_allowed);
t_state.target_state = state;
p_throttling = &(pr->throttling);
- cpumask_and(online_throttling_cpus, cpu_online_mask,
- p_throttling->shared_cpu_map);
+
/*
* The throttling notifier will be called for every
* affected cpu in order to get one proper T-state.
* The notifier event is THROTTLING_PRECHANGE.
*/
- for_each_cpu(i, online_throttling_cpus) {
+ for_each_cpu_and(i, cpu_online_mask, p_throttling->shared_cpu_map) {
t_state.cpu = i;
acpi_processor_throttling_notifier(THROTTLING_PRECHANGE,
&t_state);
@@ -1121,29 +1098,27 @@ int acpi_processor_set_throttling(struct acpi_processor *pr,
* it can be called only for the cpu pointed by pr.
*/
if (p_throttling->shared_type == DOMAIN_COORD_TYPE_SW_ANY) {
- /* FIXME: use work_on_cpu() */
- if (set_cpus_allowed_ptr(current, cpumask_of(pr->id))) {
- /* Can't migrate to the pr->id CPU. Exit */
- ret = -ENODEV;
- goto exit;
- }
- ret = p_throttling->acpi_processor_set_throttling(pr,
- t_state.target_state, force);
+ arg.pr = pr;
+ arg.target_state = state;
+ arg.force = force;
+ ret = call_on_cpu(pr->id, acpi_processor_throttling_fn, &arg,
+ direct);
} else {
/*
* When the T-state coordination is SW_ALL or HW_ALL,
* it is necessary to set T-state for every affected
* cpus.
*/
- for_each_cpu(i, online_throttling_cpus) {
+ for_each_cpu_and(i, cpu_online_mask,
+ p_throttling->shared_cpu_map) {
match_pr = per_cpu(processors, i);
/*
* If the pointer is invalid, we will report the
* error message and continue.
*/
if (!match_pr) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Invalid Pointer for CPU %d\n", i));
+ acpi_handle_debug(pr->handle,
+ "Invalid Pointer for CPU %d\n", i);
continue;
}
/*
@@ -1151,18 +1126,16 @@ int acpi_processor_set_throttling(struct acpi_processor *pr,
* we will report the error message and continue.
*/
if (!match_pr->flags.throttling) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Throttling Control is unsupported "
- "on CPU %d\n", i));
+ acpi_handle_debug(pr->handle,
+ "Throttling Control unsupported on CPU %d\n", i);
continue;
}
- t_state.cpu = i;
- /* FIXME: use work_on_cpu() */
- if (set_cpus_allowed_ptr(current, cpumask_of(i)))
- continue;
- ret = match_pr->throttling.
- acpi_processor_set_throttling(
- match_pr, t_state.target_state, force);
+
+ arg.pr = match_pr;
+ arg.target_state = state;
+ arg.force = force;
+ ret = call_on_cpu(pr->id, acpi_processor_throttling_fn,
+ &arg, direct);
}
}
/*
@@ -1171,30 +1144,31 @@ int acpi_processor_set_throttling(struct acpi_processor *pr,
* affected cpu to update the T-states.
* The notifier event is THROTTLING_POSTCHANGE
*/
- for_each_cpu(i, online_throttling_cpus) {
+ for_each_cpu_and(i, cpu_online_mask, p_throttling->shared_cpu_map) {
t_state.cpu = i;
acpi_processor_throttling_notifier(THROTTLING_POSTCHANGE,
&t_state);
}
- /* restore the previous state */
- /* FIXME: use work_on_cpu() */
- set_cpus_allowed_ptr(current, saved_mask);
-exit:
- free_cpumask_var(online_throttling_cpus);
- free_cpumask_var(saved_mask);
+
return ret;
}
+int acpi_processor_set_throttling(struct acpi_processor *pr, int state,
+ bool force)
+{
+ return __acpi_processor_set_throttling(pr, state, force, false);
+}
+
int acpi_processor_get_throttling_info(struct acpi_processor *pr)
{
int result = 0;
struct acpi_processor_throttling *pthrottling;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ acpi_handle_debug(pr->handle,
"pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
pr->throttling.address,
pr->throttling.duty_offset,
- pr->throttling.duty_width));
+ pr->throttling.duty_width);
/*
* Evaluate _PTC, _TSS and _TPC
@@ -1202,8 +1176,7 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
*/
if (acpi_processor_get_throttling_control(pr) ||
acpi_processor_get_throttling_states(pr) ||
- acpi_processor_get_platform_limit(pr))
- {
+ acpi_processor_get_platform_limit(pr)) {
pr->throttling.acpi_processor_get_throttling =
&acpi_processor_get_throttling_fadt;
pr->throttling.acpi_processor_set_throttling =
@@ -1234,13 +1207,13 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
* used this part.
*/
if (errata.piix4.throttle) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Throttling not supported on PIIX4 A- or B-step\n"));
+ acpi_handle_debug(pr->handle,
+ "Throttling not supported on PIIX4 A- or B-step\n");
return 0;
}
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d throttling states\n",
- pr->throttling.state_count));
+ acpi_handle_debug(pr->handle, "Found %d throttling states\n",
+ pr->throttling.state_count);
pr->flags.throttling = 1;
@@ -1255,15 +1228,15 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
goto end;
if (pr->throttling.state) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ acpi_handle_debug(pr->handle,
"Disabling throttling (was T%d)\n",
- pr->throttling.state));
+ pr->throttling.state);
result = acpi_processor_set_throttling(pr, 0, false);
if (result)
goto end;
}
- end:
+end:
if (result)
pr->flags.throttling = 0;
generated by cgit (git 2.34.1) at 2025-12-21 21:36:36 +0000