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Message-ID: <20070701202037.GC10869@stusta.de>
Date: Sun, 1 Jul 2007 22:20:37 +0200
From: Adrian Bunk <bunk@...sta.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Dave Jones <davej@...hat.com>, cpufreq@...ts.linux.org.uk,
linux-kernel@...r.kernel.org,
Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
lenb@...nel.org, linux-acpi@...r.kernel.org
Subject: [2.6 patch] the overdue removal of X86_SPEEDSTEP_CENTRINO_ACPI
This patch contains the overdue removal of X86_SPEEDSTEP_CENTRINO_ACPI.
Signed-off-by: Adrian Bunk <bunk@...sta.de>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
Acked-by: Dave Jones <davej@...hat.com>
---
This patch has been sent on:
- 6 Apr 2007
Documentation/feature-removal-schedule.txt | 23 -
arch/i386/kernel/cpu/cpufreq/Kconfig | 18
arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c | 280 --------------
arch/x86_64/kernel/cpufreq/Kconfig | 6
4 files changed, 21 insertions(+), 306 deletions(-)
--- linux-2.6.19-rc6-mm2/arch/i386/kernel/cpu/cpufreq/Kconfig.old 2006-12-01 07:23:38.000000000 +0100
+++ linux-2.6.19-rc6-mm2/arch/i386/kernel/cpu/cpufreq/Kconfig 2006-12-01 07:24:02.000000000 +0100
@@ -109,7 +109,7 @@
config X86_SPEEDSTEP_CENTRINO
tristate "Intel Enhanced SpeedStep"
select CPU_FREQ_TABLE
- select X86_SPEEDSTEP_CENTRINO_TABLE if (!X86_SPEEDSTEP_CENTRINO_ACPI)
+ select X86_SPEEDSTEP_CENTRINO_TABLE
help
This adds the CPUFreq driver for Enhanced SpeedStep enabled
mobile CPUs. This means Intel Pentium M (Centrino) CPUs. However,
@@ -121,20 +121,6 @@
If in doubt, say N.
-config X86_SPEEDSTEP_CENTRINO_ACPI
- bool "Use ACPI tables to decode valid frequency/voltage (deprecated)"
- depends on X86_SPEEDSTEP_CENTRINO && ACPI_PROCESSOR
- depends on !(X86_SPEEDSTEP_CENTRINO = y && ACPI_PROCESSOR = m)
- help
- This is deprecated and this functionality is now merged into
- acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
- speedstep_centrino.
- Use primarily the information provided in the BIOS ACPI tables
- to determine valid CPU frequency and voltage pairings. It is
- required for the driver to work on non-Banias CPUs.
-
- If in doubt, say Y.
-
config X86_SPEEDSTEP_CENTRINO_TABLE
bool "Built-in tables for Banias CPUs"
depends on X86_SPEEDSTEP_CENTRINO
@@ -222,7 +207,7 @@
config X86_ACPI_CPUFREQ_PROC_INTF
bool "/proc/acpi/processor/../performance interface (deprecated)"
depends on PROC_FS
- depends on X86_ACPI_CPUFREQ || X86_SPEEDSTEP_CENTRINO_ACPI || X86_POWERNOW_K7_ACPI || X86_POWERNOW_K8_ACPI
+ depends on X86_ACPI_CPUFREQ || X86_POWERNOW_K7_ACPI || X86_POWERNOW_K8_ACPI
help
This enables the deprecated /proc/acpi/processor/../performance
interface. While it is helpful for debugging, the generic,
--- linux-2.6.19-rc6-mm2/arch/x86_64/kernel/cpufreq/Kconfig.old 2006-12-01 07:24:11.000000000 +0100
+++ linux-2.6.19-rc6-mm2/arch/x86_64/kernel/cpufreq/Kconfig 2006-12-01 07:24:21.000000000 +0100
@@ -42,10 +42,6 @@
If in doubt, say N.
-config X86_SPEEDSTEP_CENTRINO_ACPI
- bool
- depends on X86_SPEEDSTEP_CENTRINO
-
config X86_ACPI_CPUFREQ
tristate "ACPI Processor P-States driver"
select CPU_FREQ_TABLE
@@ -65,7 +60,7 @@
config X86_ACPI_CPUFREQ_PROC_INTF
bool "/proc/acpi/processor/../performance interface (deprecated)"
depends on PROC_FS
- depends on X86_ACPI_CPUFREQ || X86_SPEEDSTEP_CENTRINO_ACPI || X86_POWERNOW_K8_ACPI
+ depends on X86_ACPI_CPUFREQ || X86_POWERNOW_K8_ACPI
help
This enables the deprecated /proc/acpi/processor/../performance
interface. While it is helpful for debugging, the generic,
--- linux-2.6.20-mm1/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c.old 2007-02-17 23:29:53.000000000 +0100
+++ linux-2.6.20-mm1/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c 2007-02-17 23:30:44.000000000 +0100
@@ -21,12 +21,6 @@
#include <linux/delay.h>
#include <linux/compiler.h>
-#ifdef CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI
-#include <linux/acpi.h>
-#include <linux/dmi.h>
-#include <acpi/processor.h>
-#endif
-
#include <asm/msr.h>
#include <asm/processor.h>
#include <asm/cpufeature.h>
@@ -257,9 +251,7 @@
/* Matched a non-match */
dprintk("no table support for CPU model \"%s\"\n",
cpu->x86_model_id);
-#ifndef CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI
- dprintk("try compiling with CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI enabled\n");
-#endif
+ dprintk("try using the acpi-cpufreq driver\n");
return -ENOENT;
}
@@ -346,213 +338,6 @@
}
-#ifdef CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI
-
-static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
-
-/*
- * centrino_cpu_early_init_acpi - Do the preregistering with ACPI P-States
- * library
- *
- * Before doing the actual init, we need to do _PSD related setup whenever
- * supported by the BIOS. These are handled by this early_init routine.
- */
-static int centrino_cpu_early_init_acpi(void)
-{
- unsigned int i, j;
- struct acpi_processor_performance *data;
-
- for_each_possible_cpu(i) {
- data = kzalloc(sizeof(struct acpi_processor_performance),
- GFP_KERNEL);
- if (!data) {
- for_each_possible_cpu(j) {
- kfree(acpi_perf_data[j]);
- acpi_perf_data[j] = NULL;
- }
- return (-ENOMEM);
- }
- acpi_perf_data[i] = data;
- }
-
- acpi_processor_preregister_performance(acpi_perf_data);
- return 0;
-}
-
-
-#ifdef CONFIG_SMP
-/*
- * Some BIOSes do SW_ANY coordination internally, either set it up in hw
- * or do it in BIOS firmware and won't inform about it to OS. If not
- * detected, this has a side effect of making CPU run at a different speed
- * than OS intended it to run at. Detect it and handle it cleanly.
- */
-static int bios_with_sw_any_bug;
-static int sw_any_bug_found(struct dmi_system_id *d)
-{
- bios_with_sw_any_bug = 1;
- return 0;
-}
-
-static struct dmi_system_id sw_any_bug_dmi_table[] = {
- {
- .callback = sw_any_bug_found,
- .ident = "Supermicro Server X6DLP",
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
- DMI_MATCH(DMI_BIOS_VERSION, "080010"),
- DMI_MATCH(DMI_PRODUCT_NAME, "X6DLP"),
- },
- },
- { }
-};
-#endif
-
-/*
- * centrino_cpu_init_acpi - register with ACPI P-States library
- *
- * Register with the ACPI P-States library (part of drivers/acpi/processor.c)
- * in order to determine correct frequency and voltage pairings by reading
- * the _PSS of the ACPI DSDT or SSDT tables.
- */
-static int centrino_cpu_init_acpi(struct cpufreq_policy *policy)
-{
- unsigned long cur_freq;
- int result = 0, i;
- unsigned int cpu = policy->cpu;
- struct acpi_processor_performance *p;
-
- p = acpi_perf_data[cpu];
-
- /* register with ACPI core */
- if (acpi_processor_register_performance(p, cpu)) {
- dprintk(PFX "obtaining ACPI data failed\n");
- return -EIO;
- }
-
- policy->shared_type = p->shared_type;
- /*
- * Will let policy->cpus know about dependency only when software
- * coordination is required.
- */
- if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
- policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
- policy->cpus = p->shared_cpu_map;
- }
-
-#ifdef CONFIG_SMP
- dmi_check_system(sw_any_bug_dmi_table);
- if (bios_with_sw_any_bug && cpus_weight(policy->cpus) == 1) {
- policy->shared_type = CPUFREQ_SHARED_TYPE_ALL;
- policy->cpus = cpu_core_map[cpu];
- }
-#endif
-
- /* verify the acpi_data */
- if (p->state_count <= 1) {
- dprintk("No P-States\n");
- result = -ENODEV;
- goto err_unreg;
- }
-
- if ((p->control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
- (p->status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
- dprintk("Invalid control/status registers (%x - %x)\n",
- p->control_register.space_id, p->status_register.space_id);
- result = -EIO;
- goto err_unreg;
- }
-
- for (i=0; i<p->state_count; i++) {
- if ((p->states[i].control & INTEL_MSR_RANGE) !=
- (p->states[i].status & INTEL_MSR_RANGE)) {
- dprintk("Different MSR bits in control (%llu) and status (%llu)\n",
- p->states[i].control, p->states[i].status);
- result = -EINVAL;
- goto err_unreg;
- }
-
- if (!p->states[i].core_frequency) {
- dprintk("Zero core frequency for state %u\n", i);
- result = -EINVAL;
- goto err_unreg;
- }
-
- if (p->states[i].core_frequency > p->states[0].core_frequency) {
- dprintk("P%u has larger frequency (%llu) than P0 (%llu), skipping\n", i,
- p->states[i].core_frequency, p->states[0].core_frequency);
- p->states[i].core_frequency = 0;
- continue;
- }
- }
-
- centrino_model[cpu] = kzalloc(sizeof(struct cpu_model), GFP_KERNEL);
- if (!centrino_model[cpu]) {
- result = -ENOMEM;
- goto err_unreg;
- }
-
- centrino_model[cpu]->model_name=NULL;
- centrino_model[cpu]->max_freq = p->states[0].core_frequency * 1000;
- centrino_model[cpu]->op_points = kmalloc(sizeof(struct cpufreq_frequency_table) *
- (p->state_count + 1), GFP_KERNEL);
- if (!centrino_model[cpu]->op_points) {
- result = -ENOMEM;
- goto err_kfree;
- }
-
- for (i=0; i<p->state_count; i++) {
- centrino_model[cpu]->op_points[i].index = p->states[i].control & INTEL_MSR_RANGE;
- centrino_model[cpu]->op_points[i].frequency = p->states[i].core_frequency * 1000;
- dprintk("adding state %i with frequency %u and control value %04x\n",
- i, centrino_model[cpu]->op_points[i].frequency, centrino_model[cpu]->op_points[i].index);
- }
- centrino_model[cpu]->op_points[p->state_count].frequency = CPUFREQ_TABLE_END;
-
- cur_freq = get_cur_freq(cpu);
-
- for (i=0; i<p->state_count; i++) {
- if (!p->states[i].core_frequency) {
- dprintk("skipping state %u\n", i);
- centrino_model[cpu]->op_points[i].frequency = CPUFREQ_ENTRY_INVALID;
- continue;
- }
-
- if (extract_clock(centrino_model[cpu]->op_points[i].index, cpu, 0) !=
- (centrino_model[cpu]->op_points[i].frequency)) {
- dprintk("Invalid encoded frequency (%u vs. %u)\n",
- extract_clock(centrino_model[cpu]->op_points[i].index, cpu, 0),
- centrino_model[cpu]->op_points[i].frequency);
- result = -EINVAL;
- goto err_kfree_all;
- }
-
- if (cur_freq == centrino_model[cpu]->op_points[i].frequency)
- p->state = i;
- }
-
- /* notify BIOS that we exist */
- acpi_processor_notify_smm(THIS_MODULE);
- printk("speedstep-centrino with X86_SPEEDSTEP_CENTRINO_ACPI "
- "config is deprecated.\n "
- "Use X86_ACPI_CPUFREQ (acpi-cpufreq) instead.\n" );
-
- return 0;
-
- err_kfree_all:
- kfree(centrino_model[cpu]->op_points);
- err_kfree:
- kfree(centrino_model[cpu]);
- err_unreg:
- acpi_processor_unregister_performance(p, cpu);
- dprintk(PFX "invalid ACPI data\n");
- return (result);
-}
-#else
-static inline int centrino_cpu_init_acpi(struct cpufreq_policy *policy) { return -ENODEV; }
-static inline int centrino_cpu_early_init_acpi(void) { return 0; }
-#endif
-
static int centrino_cpu_init(struct cpufreq_policy *policy)
{
struct cpuinfo_x86 *cpu = &cpu_data[policy->cpu];
@@ -568,27 +353,25 @@
if (cpu_has(cpu, X86_FEATURE_CONSTANT_TSC))
centrino_driver.flags |= CPUFREQ_CONST_LOOPS;
- if (centrino_cpu_init_acpi(policy)) {
- if (policy->cpu != 0)
- return -ENODEV;
+ if (policy->cpu != 0)
+ return -ENODEV;
- for (i = 0; i < N_IDS; i++)
- if (centrino_verify_cpu_id(cpu, &cpu_ids[i]))
- break;
-
- if (i != N_IDS)
- centrino_cpu[policy->cpu] = &cpu_ids[i];
-
- if (!centrino_cpu[policy->cpu]) {
- dprintk("found unsupported CPU with "
- "Enhanced SpeedStep: send /proc/cpuinfo to "
- MAINTAINER "\n");
- return -ENODEV;
- }
+ for (i = 0; i < N_IDS; i++)
+ if (centrino_verify_cpu_id(cpu, &cpu_ids[i]))
+ break;
- if (centrino_cpu_init_table(policy)) {
- return -ENODEV;
- }
+ if (i != N_IDS)
+ centrino_cpu[policy->cpu] = &cpu_ids[i];
+
+ if (!centrino_cpu[policy->cpu]) {
+ dprintk("found unsupported CPU with "
+ "Enhanced SpeedStep: send /proc/cpuinfo to "
+ MAINTAINER "\n");
+ return -ENODEV;
+ }
+
+ if (centrino_cpu_init_table(policy)) {
+ return -ENODEV;
}
/* Check to see if Enhanced SpeedStep is enabled, and try to
@@ -634,20 +417,6 @@
cpufreq_frequency_table_put_attr(cpu);
-#ifdef CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI
- if (!centrino_model[cpu]->model_name) {
- static struct acpi_processor_performance *p;
-
- if (acpi_perf_data[cpu]) {
- p = acpi_perf_data[cpu];
- dprintk("unregistering and freeing ACPI data\n");
- acpi_processor_unregister_performance(p, cpu);
- kfree(centrino_model[cpu]->op_points);
- kfree(centrino_model[cpu]);
- }
- }
-#endif
-
centrino_model[cpu] = NULL;
return 0;
@@ -841,25 +610,12 @@
if (!cpu_has(cpu, X86_FEATURE_EST))
return -ENODEV;
- centrino_cpu_early_init_acpi();
-
return cpufreq_register_driver(¢rino_driver);
}
static void __exit centrino_exit(void)
{
-#ifdef CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI
- unsigned int j;
-#endif
-
cpufreq_unregister_driver(¢rino_driver);
-
-#ifdef CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI
- for_each_possible_cpu(j) {
- kfree(acpi_perf_data[j]);
- acpi_perf_data[j] = NULL;
- }
-#endif
}
MODULE_AUTHOR ("Jeremy Fitzhardinge <jeremy@...p.org>");
--- linux-2.6.20-mm1/Documentation/feature-removal-schedule.txt.old 2007-02-17 23:33:09.000000000 +0100
+++ linux-2.6.20-mm1/Documentation/feature-removal-schedule.txt 2007-02-17 23:33:46.000000000 +0100
@@ -214,28 +214,6 @@
---------------------------
-What: ACPI hooks (X86_SPEEDSTEP_CENTRINO_ACPI) in speedstep-centrino driver
-When: December 2006
-Why: Speedstep-centrino driver with ACPI hooks and acpi-cpufreq driver are
- functionally very much similar. They talk to ACPI in same way. Only
- difference between them is the way they do frequency transitions.
- One uses MSRs and the other one uses IO ports. Functionaliy of
- speedstep_centrino with ACPI hooks is now merged into acpi-cpufreq.
- That means one common driver will support all Intel Enhanced Speedstep
- capable CPUs. That means less confusion over name of
- speedstep-centrino driver (with that driver supposed to be used on
- non-centrino platforms). That means less duplication of code and
- less maintenance effort and no possibility of these two drivers
- going out of sync.
- Current users of speedstep_centrino with ACPI hooks are requested to
- switch over to acpi-cpufreq driver. speedstep-centrino will continue
- to work using older non-ACPI static table based scheme even after this
- date.
-
-Who: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
-
----------------------------
-
What: /sys/firmware/acpi/namespace
When: 2.6.21
Why: The ACPI namespace is effectively the symbol list for
-
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