v4.19.13 snapshot.
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
new file mode 100644
index 0000000..a303fd0
--- /dev/null
+++ b/drivers/acpi/processor_perflib.c
@@ -0,0 +1,811 @@
+/*
+ * processor_perflib.c - ACPI Processor P-States Library ($Revision: 71 $)
+ *
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/cpufreq.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <acpi/processor.h>
+#ifdef CONFIG_X86
+#include <asm/cpufeature.h>
+#endif
+
+#define PREFIX "ACPI: "
+
+#define ACPI_PROCESSOR_CLASS "processor"
+#define ACPI_PROCESSOR_FILE_PERFORMANCE "performance"
+#define _COMPONENT ACPI_PROCESSOR_COMPONENT
+ACPI_MODULE_NAME("processor_perflib");
+
+static DEFINE_MUTEX(performance_mutex);
+
+/*
+ * _PPC support is implemented as a CPUfreq policy notifier:
+ * This means each time a CPUfreq driver registered also with
+ * the ACPI core is asked to change the speed policy, the maximum
+ * value is adjusted so that it is within the platform limit.
+ *
+ * Also, when a new platform limit value is detected, the CPUfreq
+ * policy is adjusted accordingly.
+ */
+
+/* ignore_ppc:
+ * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet
+ * ignore _PPC
+ * 0 -> cpufreq low level drivers initialized -> consider _PPC values
+ * 1 -> ignore _PPC totally -> forced by user through boot param
+ */
+static int ignore_ppc = -1;
+module_param(ignore_ppc, int, 0644);
+MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \
+ "limited by BIOS, this should help");
+
+#define PPC_REGISTERED 1
+#define PPC_IN_USE 2
+
+static int acpi_processor_ppc_status;
+
+static int acpi_processor_ppc_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct cpufreq_policy *policy = data;
+ struct acpi_processor *pr;
+ unsigned int ppc = 0;
+
+ if (ignore_ppc < 0)
+ ignore_ppc = 0;
+
+ if (ignore_ppc)
+ return 0;
+
+ if (event != CPUFREQ_ADJUST)
+ return 0;
+
+ mutex_lock(&performance_mutex);
+
+ pr = per_cpu(processors, policy->cpu);
+ if (!pr || !pr->performance)
+ goto out;
+
+ ppc = (unsigned int)pr->performance_platform_limit;
+
+ if (ppc >= pr->performance->state_count)
+ goto out;
+
+ cpufreq_verify_within_limits(policy, 0,
+ pr->performance->states[ppc].
+ core_frequency * 1000);
+
+ out:
+ mutex_unlock(&performance_mutex);
+
+ return 0;
+}
+
+static struct notifier_block acpi_ppc_notifier_block = {
+ .notifier_call = acpi_processor_ppc_notifier,
+};
+
+static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
+{
+ acpi_status status = 0;
+ unsigned long long ppc = 0;
+
+
+ if (!pr)
+ return -EINVAL;
+
+ /*
+ * _PPC indicates the maximum state currently supported by the platform
+ * (e.g. 0 = states 0..n; 1 = states 1..n; etc.
+ */
+ status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc);
+
+ if (status != AE_NOT_FOUND)
+ acpi_processor_ppc_status |= PPC_IN_USE;
+
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PPC"));
+ return -ENODEV;
+ }
+
+ pr_debug("CPU %d: _PPC is %d - frequency %s limited\n", pr->id,
+ (int)ppc, ppc ? "" : "not");
+
+ pr->performance_platform_limit = (int)ppc;
+
+ return 0;
+}
+
+#define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
+/*
+ * acpi_processor_ppc_ost: Notify firmware the _PPC evaluation status
+ * @handle: ACPI processor handle
+ * @status: the status code of _PPC evaluation
+ * 0: success. OSPM is now using the performance state specificed.
+ * 1: failure. OSPM has not changed the number of P-states in use
+ */
+static void acpi_processor_ppc_ost(acpi_handle handle, int status)
+{
+ if (acpi_has_method(handle, "_OST"))
+ acpi_evaluate_ost(handle, ACPI_PROCESSOR_NOTIFY_PERFORMANCE,
+ status, NULL);
+}
+
+void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag)
+{
+ int ret;
+
+ if (ignore_ppc || !pr->performance) {
+ /*
+ * Only when it is notification event, the _OST object
+ * will be evaluated. Otherwise it is skipped.
+ */
+ if (event_flag)
+ acpi_processor_ppc_ost(pr->handle, 1);
+ return;
+ }
+
+ ret = acpi_processor_get_platform_limit(pr);
+ /*
+ * Only when it is notification event, the _OST object
+ * will be evaluated. Otherwise it is skipped.
+ */
+ if (event_flag) {
+ if (ret < 0)
+ acpi_processor_ppc_ost(pr->handle, 1);
+ else
+ acpi_processor_ppc_ost(pr->handle, 0);
+ }
+ if (ret >= 0)
+ cpufreq_update_policy(pr->id);
+}
+
+int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
+{
+ struct acpi_processor *pr;
+
+ pr = per_cpu(processors, cpu);
+ if (!pr || !pr->performance || !pr->performance->state_count)
+ return -ENODEV;
+ *limit = pr->performance->states[pr->performance_platform_limit].
+ core_frequency * 1000;
+ return 0;
+}
+EXPORT_SYMBOL(acpi_processor_get_bios_limit);
+
+void acpi_processor_ppc_init(void)
+{
+ if (!cpufreq_register_notifier
+ (&acpi_ppc_notifier_block, CPUFREQ_POLICY_NOTIFIER))
+ acpi_processor_ppc_status |= PPC_REGISTERED;
+ else
+ printk(KERN_DEBUG
+ "Warning: Processor Platform Limit not supported.\n");
+}
+
+void acpi_processor_ppc_exit(void)
+{
+ if (acpi_processor_ppc_status & PPC_REGISTERED)
+ cpufreq_unregister_notifier(&acpi_ppc_notifier_block,
+ CPUFREQ_POLICY_NOTIFIER);
+
+ acpi_processor_ppc_status &= ~PPC_REGISTERED;
+}
+
+static int acpi_processor_get_performance_control(struct acpi_processor *pr)
+{
+ int result = 0;
+ acpi_status status = 0;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *pct = NULL;
+ union acpi_object obj = { 0 };
+
+
+ status = acpi_evaluate_object(pr->handle, "_PCT", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PCT"));
+ return -ENODEV;
+ }
+
+ pct = (union acpi_object *)buffer.pointer;
+ if (!pct || (pct->type != ACPI_TYPE_PACKAGE)
+ || (pct->package.count != 2)) {
+ printk(KERN_ERR PREFIX "Invalid _PCT data\n");
+ result = -EFAULT;
+ goto end;
+ }
+
+ /*
+ * control_register
+ */
+
+ obj = pct->package.elements[0];
+
+ if ((obj.type != ACPI_TYPE_BUFFER)
+ || (obj.buffer.length < sizeof(struct acpi_pct_register))
+ || (obj.buffer.pointer == NULL)) {
+ printk(KERN_ERR PREFIX "Invalid _PCT data (control_register)\n");
+ result = -EFAULT;
+ goto end;
+ }
+ memcpy(&pr->performance->control_register, obj.buffer.pointer,
+ sizeof(struct acpi_pct_register));
+
+ /*
+ * status_register
+ */
+
+ obj = pct->package.elements[1];
+
+ if ((obj.type != ACPI_TYPE_BUFFER)
+ || (obj.buffer.length < sizeof(struct acpi_pct_register))
+ || (obj.buffer.pointer == NULL)) {
+ printk(KERN_ERR PREFIX "Invalid _PCT data (status_register)\n");
+ result = -EFAULT;
+ goto end;
+ }
+
+ memcpy(&pr->performance->status_register, obj.buffer.pointer,
+ sizeof(struct acpi_pct_register));
+
+ end:
+ kfree(buffer.pointer);
+
+ return result;
+}
+
+#ifdef CONFIG_X86
+/*
+ * Some AMDs have 50MHz frequency multiples, but only provide 100MHz rounding
+ * in their ACPI data. Calculate the real values and fix up the _PSS data.
+ */
+static void amd_fixup_frequency(struct acpi_processor_px *px, int i)
+{
+ u32 hi, lo, fid, did;
+ int index = px->control & 0x00000007;
+
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+ return;
+
+ if ((boot_cpu_data.x86 == 0x10 && boot_cpu_data.x86_model < 10)
+ || boot_cpu_data.x86 == 0x11) {
+ rdmsr(MSR_AMD_PSTATE_DEF_BASE + index, lo, hi);
+ /*
+ * MSR C001_0064+:
+ * Bit 63: PstateEn. Read-write. If set, the P-state is valid.
+ */
+ if (!(hi & BIT(31)))
+ return;
+
+ fid = lo & 0x3f;
+ did = (lo >> 6) & 7;
+ if (boot_cpu_data.x86 == 0x10)
+ px->core_frequency = (100 * (fid + 0x10)) >> did;
+ else
+ px->core_frequency = (100 * (fid + 8)) >> did;
+ }
+}
+#else
+static void amd_fixup_frequency(struct acpi_processor_px *px, int i) {};
+#endif
+
+static int acpi_processor_get_performance_states(struct acpi_processor *pr)
+{
+ int result = 0;
+ acpi_status status = AE_OK;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_buffer format = { sizeof("NNNNNN"), "NNNNNN" };
+ struct acpi_buffer state = { 0, NULL };
+ union acpi_object *pss = NULL;
+ int i;
+ int last_invalid = -1;
+
+
+ status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PSS"));
+ return -ENODEV;
+ }
+
+ pss = buffer.pointer;
+ if (!pss || (pss->type != ACPI_TYPE_PACKAGE)) {
+ printk(KERN_ERR PREFIX "Invalid _PSS data\n");
+ result = -EFAULT;
+ goto end;
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d performance states\n",
+ pss->package.count));
+
+ pr->performance->state_count = pss->package.count;
+ pr->performance->states =
+ kmalloc_array(pss->package.count,
+ sizeof(struct acpi_processor_px),
+ GFP_KERNEL);
+ if (!pr->performance->states) {
+ result = -ENOMEM;
+ goto end;
+ }
+
+ for (i = 0; i < pr->performance->state_count; i++) {
+
+ struct acpi_processor_px *px = &(pr->performance->states[i]);
+
+ state.length = sizeof(struct acpi_processor_px);
+ state.pointer = px;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Extracting state %d\n", i));
+
+ status = acpi_extract_package(&(pss->package.elements[i]),
+ &format, &state);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Invalid _PSS data"));
+ result = -EFAULT;
+ kfree(pr->performance->states);
+ goto end;
+ }
+
+ amd_fixup_frequency(px, i);
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "State [%d]: core_frequency[%d] power[%d] transition_latency[%d] bus_master_latency[%d] control[0x%x] status[0x%x]\n",
+ i,
+ (u32) px->core_frequency,
+ (u32) px->power,
+ (u32) px->transition_latency,
+ (u32) px->bus_master_latency,
+ (u32) px->control, (u32) px->status));
+
+ /*
+ * Check that ACPI's u64 MHz will be valid as u32 KHz in cpufreq
+ */
+ if (!px->core_frequency ||
+ ((u32)(px->core_frequency * 1000) !=
+ (px->core_frequency * 1000))) {
+ printk(KERN_ERR FW_BUG PREFIX
+ "Invalid BIOS _PSS frequency found for processor %d: 0x%llx MHz\n",
+ pr->id, px->core_frequency);
+ if (last_invalid == -1)
+ last_invalid = i;
+ } else {
+ if (last_invalid != -1) {
+ /*
+ * Copy this valid entry over last_invalid entry
+ */
+ memcpy(&(pr->performance->states[last_invalid]),
+ px, sizeof(struct acpi_processor_px));
+ ++last_invalid;
+ }
+ }
+ }
+
+ if (last_invalid == 0) {
+ printk(KERN_ERR FW_BUG PREFIX
+ "No valid BIOS _PSS frequency found for processor %d\n", pr->id);
+ result = -EFAULT;
+ kfree(pr->performance->states);
+ pr->performance->states = NULL;
+ }
+
+ if (last_invalid > 0)
+ pr->performance->state_count = last_invalid;
+
+ end:
+ kfree(buffer.pointer);
+
+ return result;
+}
+
+int acpi_processor_get_performance_info(struct acpi_processor *pr)
+{
+ int result = 0;
+
+ if (!pr || !pr->performance || !pr->handle)
+ return -EINVAL;
+
+ if (!acpi_has_method(pr->handle, "_PCT")) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "ACPI-based processor performance control unavailable\n"));
+ return -ENODEV;
+ }
+
+ result = acpi_processor_get_performance_control(pr);
+ if (result)
+ goto update_bios;
+
+ result = acpi_processor_get_performance_states(pr);
+ if (result)
+ goto update_bios;
+
+ /* We need to call _PPC once when cpufreq starts */
+ if (ignore_ppc != 1)
+ result = acpi_processor_get_platform_limit(pr);
+
+ return result;
+
+ /*
+ * Having _PPC but missing frequencies (_PSS, _PCT) is a very good hint that
+ * the BIOS is older than the CPU and does not know its frequencies
+ */
+ update_bios:
+#ifdef CONFIG_X86
+ if (acpi_has_method(pr->handle, "_PPC")) {
+ if(boot_cpu_has(X86_FEATURE_EST))
+ printk(KERN_WARNING FW_BUG "BIOS needs update for CPU "
+ "frequency support\n");
+ }
+#endif
+ return result;
+}
+EXPORT_SYMBOL_GPL(acpi_processor_get_performance_info);
+
+int acpi_processor_pstate_control(void)
+{
+ acpi_status status;
+
+ if (!acpi_gbl_FADT.smi_command || !acpi_gbl_FADT.pstate_control)
+ return 0;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Writing pstate_control [0x%x] to smi_command [0x%x]\n",
+ acpi_gbl_FADT.pstate_control, acpi_gbl_FADT.smi_command));
+
+ status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
+ (u32)acpi_gbl_FADT.pstate_control, 8);
+ if (ACPI_SUCCESS(status))
+ return 1;
+
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Failed to write pstate_control [0x%x] to smi_command [0x%x]",
+ acpi_gbl_FADT.pstate_control, acpi_gbl_FADT.smi_command));
+ return -EIO;
+}
+
+int acpi_processor_notify_smm(struct module *calling_module)
+{
+ static int is_done = 0;
+ int result;
+
+ if (!(acpi_processor_ppc_status & PPC_REGISTERED))
+ return -EBUSY;
+
+ if (!try_module_get(calling_module))
+ return -EINVAL;
+
+ /* is_done is set to negative if an error occurred,
+ * and to postitive if _no_ error occurred, but SMM
+ * was already notified. This avoids double notification
+ * which might lead to unexpected results...
+ */
+ if (is_done > 0) {
+ module_put(calling_module);
+ return 0;
+ } else if (is_done < 0) {
+ module_put(calling_module);
+ return is_done;
+ }
+
+ is_done = -EIO;
+
+ result = acpi_processor_pstate_control();
+ if (!result) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No SMI port or pstate_control\n"));
+ module_put(calling_module);
+ return 0;
+ }
+ if (result < 0) {
+ module_put(calling_module);
+ return result;
+ }
+
+ /* Success. If there's no _PPC, we need to fear nothing, so
+ * we can allow the cpufreq driver to be rmmod'ed. */
+ is_done = 1;
+
+ if (!(acpi_processor_ppc_status & PPC_IN_USE))
+ module_put(calling_module);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(acpi_processor_notify_smm);
+
+int acpi_processor_get_psd(acpi_handle handle, struct acpi_psd_package *pdomain)
+{
+ int result = 0;
+ acpi_status status = AE_OK;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ struct acpi_buffer format = {sizeof("NNNNN"), "NNNNN"};
+ struct acpi_buffer state = {0, NULL};
+ union acpi_object *psd = NULL;
+
+ status = acpi_evaluate_object(handle, "_PSD", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ return -ENODEV;
+ }
+
+ psd = buffer.pointer;
+ if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) {
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
+ result = -EFAULT;
+ goto end;
+ }
+
+ if (psd->package.count != 1) {
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
+ result = -EFAULT;
+ goto end;
+ }
+
+ state.length = sizeof(struct acpi_psd_package);
+ state.pointer = pdomain;
+
+ status = acpi_extract_package(&(psd->package.elements[0]),
+ &format, &state);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
+ result = -EFAULT;
+ goto end;
+ }
+
+ if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) {
+ printk(KERN_ERR PREFIX "Unknown _PSD:num_entries\n");
+ result = -EFAULT;
+ goto end;
+ }
+
+ if (pdomain->revision != ACPI_PSD_REV0_REVISION) {
+ printk(KERN_ERR PREFIX "Unknown _PSD:revision\n");
+ result = -EFAULT;
+ goto end;
+ }
+
+ if (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL &&
+ pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY &&
+ pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL) {
+ printk(KERN_ERR PREFIX "Invalid _PSD:coord_type\n");
+ result = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(buffer.pointer);
+ return result;
+}
+EXPORT_SYMBOL(acpi_processor_get_psd);
+
+int acpi_processor_preregister_performance(
+ struct acpi_processor_performance __percpu *performance)
+{
+ int count_target;
+ int retval = 0;
+ unsigned int i, j;
+ cpumask_var_t covered_cpus;
+ struct acpi_processor *pr;
+ struct acpi_psd_package *pdomain;
+ struct acpi_processor *match_pr;
+ struct acpi_psd_package *match_pdomain;
+
+ if (!zalloc_cpumask_var(&covered_cpus, GFP_KERNEL))
+ return -ENOMEM;
+
+ mutex_lock(&performance_mutex);
+
+ /*
+ * Check if another driver has already registered, and abort before
+ * changing pr->performance if it has. Check input data as well.
+ */
+ for_each_possible_cpu(i) {
+ pr = per_cpu(processors, i);
+ if (!pr) {
+ /* Look only at processors in ACPI namespace */
+ continue;
+ }
+
+ if (pr->performance) {
+ retval = -EBUSY;
+ goto err_out;
+ }
+
+ if (!performance || !per_cpu_ptr(performance, i)) {
+ retval = -EINVAL;
+ goto err_out;
+ }
+ }
+
+ /* Call _PSD for all CPUs */
+ for_each_possible_cpu(i) {
+ pr = per_cpu(processors, i);
+ if (!pr)
+ continue;
+
+ pr->performance = per_cpu_ptr(performance, i);
+ cpumask_set_cpu(i, pr->performance->shared_cpu_map);
+ pdomain = &(pr->performance->domain_info);
+ if (acpi_processor_get_psd(pr->handle, pdomain)) {
+ retval = -EINVAL;
+ continue;
+ }
+ }
+ if (retval)
+ goto err_ret;
+
+ /*
+ * Now that we have _PSD data from all CPUs, lets setup P-state
+ * domain info.
+ */
+ for_each_possible_cpu(i) {
+ pr = per_cpu(processors, i);
+ if (!pr)
+ continue;
+
+ if (cpumask_test_cpu(i, covered_cpus))
+ continue;
+
+ pdomain = &(pr->performance->domain_info);
+ cpumask_set_cpu(i, pr->performance->shared_cpu_map);
+ cpumask_set_cpu(i, covered_cpus);
+ if (pdomain->num_processors <= 1)
+ continue;
+
+ /* Validate the Domain info */
+ count_target = pdomain->num_processors;
+ if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL)
+ pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
+ else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL)
+ pr->performance->shared_type = CPUFREQ_SHARED_TYPE_HW;
+ else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY)
+ pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY;
+
+ for_each_possible_cpu(j) {
+ if (i == j)
+ continue;
+
+ match_pr = per_cpu(processors, j);
+ if (!match_pr)
+ continue;
+
+ match_pdomain = &(match_pr->performance->domain_info);
+ if (match_pdomain->domain != pdomain->domain)
+ continue;
+
+ /* Here i and j are in the same domain */
+
+ if (match_pdomain->num_processors != count_target) {
+ retval = -EINVAL;
+ goto err_ret;
+ }
+
+ if (pdomain->coord_type != match_pdomain->coord_type) {
+ retval = -EINVAL;
+ goto err_ret;
+ }
+
+ cpumask_set_cpu(j, covered_cpus);
+ cpumask_set_cpu(j, pr->performance->shared_cpu_map);
+ }
+
+ for_each_possible_cpu(j) {
+ if (i == j)
+ continue;
+
+ match_pr = per_cpu(processors, j);
+ if (!match_pr)
+ continue;
+
+ match_pdomain = &(match_pr->performance->domain_info);
+ if (match_pdomain->domain != pdomain->domain)
+ continue;
+
+ match_pr->performance->shared_type =
+ pr->performance->shared_type;
+ cpumask_copy(match_pr->performance->shared_cpu_map,
+ pr->performance->shared_cpu_map);
+ }
+ }
+
+err_ret:
+ for_each_possible_cpu(i) {
+ pr = per_cpu(processors, i);
+ if (!pr || !pr->performance)
+ continue;
+
+ /* Assume no coordination on any error parsing domain info */
+ if (retval) {
+ cpumask_clear(pr->performance->shared_cpu_map);
+ cpumask_set_cpu(i, pr->performance->shared_cpu_map);
+ pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
+ }
+ pr->performance = NULL; /* Will be set for real in register */
+ }
+
+err_out:
+ mutex_unlock(&performance_mutex);
+ free_cpumask_var(covered_cpus);
+ return retval;
+}
+EXPORT_SYMBOL(acpi_processor_preregister_performance);
+
+int
+acpi_processor_register_performance(struct acpi_processor_performance
+ *performance, unsigned int cpu)
+{
+ struct acpi_processor *pr;
+
+ if (!(acpi_processor_ppc_status & PPC_REGISTERED))
+ return -EINVAL;
+
+ mutex_lock(&performance_mutex);
+
+ pr = per_cpu(processors, cpu);
+ if (!pr) {
+ mutex_unlock(&performance_mutex);
+ return -ENODEV;
+ }
+
+ if (pr->performance) {
+ mutex_unlock(&performance_mutex);
+ return -EBUSY;
+ }
+
+ WARN_ON(!performance);
+
+ pr->performance = performance;
+
+ if (acpi_processor_get_performance_info(pr)) {
+ pr->performance = NULL;
+ mutex_unlock(&performance_mutex);
+ return -EIO;
+ }
+
+ mutex_unlock(&performance_mutex);
+ return 0;
+}
+
+EXPORT_SYMBOL(acpi_processor_register_performance);
+
+void acpi_processor_unregister_performance(unsigned int cpu)
+{
+ struct acpi_processor *pr;
+
+ mutex_lock(&performance_mutex);
+
+ pr = per_cpu(processors, cpu);
+ if (!pr) {
+ mutex_unlock(&performance_mutex);
+ return;
+ }
+
+ if (pr->performance)
+ kfree(pr->performance->states);
+ pr->performance = NULL;
+
+ mutex_unlock(&performance_mutex);
+
+ return;
+}
+
+EXPORT_SYMBOL(acpi_processor_unregister_performance);