1176 lines
28 KiB
C
1176 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/device.h>
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#include <linux/cpu.h>
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#include <linux/smp.h>
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#include <linux/percpu.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/export.h>
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#include <linux/nodemask.h>
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#include <linux/cpumask.h>
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#include <linux/notifier.h>
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#include <linux/of.h>
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#include <asm/current.h>
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#include <asm/processor.h>
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#include <asm/cputable.h>
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#include <asm/hvcall.h>
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#include <asm/machdep.h>
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#include <asm/smp.h>
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#include <asm/pmc.h>
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#include <asm/firmware.h>
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#include <asm/idle.h>
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#include <asm/svm.h>
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#include "cacheinfo.h"
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#include "setup.h"
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#ifdef CONFIG_PPC64
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#include <asm/paca.h>
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#include <asm/lppaca.h>
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#endif
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static DEFINE_PER_CPU(struct cpu, cpu_devices);
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#ifdef CONFIG_PPC64
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/*
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* Snooze delay has not been hooked up since 3fa8cad82b94 ("powerpc/pseries/cpuidle:
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* smt-snooze-delay cleanup.") and has been broken even longer. As was foretold in
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* 2014:
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*
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* "ppc64_util currently utilises it. Once we fix ppc64_util, propose to clean
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* up the kernel code."
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*
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* powerpc-utils stopped using it as of 1.3.8. At some point in the future this
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* code should be removed.
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*/
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static ssize_t store_smt_snooze_delay(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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pr_warn_once("%s (%d) stored to unsupported smt_snooze_delay, which has no effect.\n",
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current->comm, current->pid);
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return count;
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}
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static ssize_t show_smt_snooze_delay(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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pr_warn_once("%s (%d) read from unsupported smt_snooze_delay\n",
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current->comm, current->pid);
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return sprintf(buf, "100\n");
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}
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static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
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store_smt_snooze_delay);
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static int __init setup_smt_snooze_delay(char *str)
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{
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if (!cpu_has_feature(CPU_FTR_SMT))
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return 1;
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pr_warn("smt-snooze-delay command line option has no effect\n");
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return 1;
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}
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__setup("smt-snooze-delay=", setup_smt_snooze_delay);
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#endif /* CONFIG_PPC64 */
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#define __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, EXTRA) \
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static void read_##NAME(void *val) \
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{ \
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*(unsigned long *)val = mfspr(ADDRESS); \
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} \
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static void write_##NAME(void *val) \
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{ \
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EXTRA; \
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mtspr(ADDRESS, *(unsigned long *)val); \
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}
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#define __SYSFS_SPRSETUP_SHOW_STORE(NAME) \
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static ssize_t show_##NAME(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct cpu *cpu = container_of(dev, struct cpu, dev); \
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unsigned long val; \
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smp_call_function_single(cpu->dev.id, read_##NAME, &val, 1); \
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return sprintf(buf, "%lx\n", val); \
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} \
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static ssize_t __used \
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store_##NAME(struct device *dev, struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct cpu *cpu = container_of(dev, struct cpu, dev); \
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unsigned long val; \
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int ret = sscanf(buf, "%lx", &val); \
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if (ret != 1) \
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return -EINVAL; \
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smp_call_function_single(cpu->dev.id, write_##NAME, &val, 1); \
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return count; \
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}
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#define SYSFS_PMCSETUP(NAME, ADDRESS) \
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__SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ppc_enable_pmcs()) \
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__SYSFS_SPRSETUP_SHOW_STORE(NAME)
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#define SYSFS_SPRSETUP(NAME, ADDRESS) \
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__SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ) \
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__SYSFS_SPRSETUP_SHOW_STORE(NAME)
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#define SYSFS_SPRSETUP_SHOW_STORE(NAME) \
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__SYSFS_SPRSETUP_SHOW_STORE(NAME)
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#ifdef CONFIG_PPC64
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/*
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* This is the system wide DSCR register default value. Any
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* change to this default value through the sysfs interface
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* will update all per cpu DSCR default values across the
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* system stored in their respective PACA structures.
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*/
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static unsigned long dscr_default;
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/**
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* read_dscr() - Fetch the cpu specific DSCR default
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* @val: Returned cpu specific DSCR default value
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*
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* This function returns the per cpu DSCR default value
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* for any cpu which is contained in it's PACA structure.
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*/
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static void read_dscr(void *val)
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{
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*(unsigned long *)val = get_paca()->dscr_default;
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}
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/**
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* write_dscr() - Update the cpu specific DSCR default
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* @val: New cpu specific DSCR default value to update
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*
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* This function updates the per cpu DSCR default value
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* for any cpu which is contained in it's PACA structure.
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*/
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static void write_dscr(void *val)
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{
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get_paca()->dscr_default = *(unsigned long *)val;
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if (!current->thread.dscr_inherit) {
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current->thread.dscr = *(unsigned long *)val;
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mtspr(SPRN_DSCR, *(unsigned long *)val);
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}
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}
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SYSFS_SPRSETUP_SHOW_STORE(dscr);
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static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
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static void add_write_permission_dev_attr(struct device_attribute *attr)
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{
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attr->attr.mode |= 0200;
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}
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/**
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* show_dscr_default() - Fetch the system wide DSCR default
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* @dev: Device structure
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* @attr: Device attribute structure
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* @buf: Interface buffer
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*
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* This function returns the system wide DSCR default value.
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*/
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static ssize_t show_dscr_default(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%lx\n", dscr_default);
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}
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/**
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* store_dscr_default() - Update the system wide DSCR default
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* @dev: Device structure
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* @attr: Device attribute structure
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* @buf: Interface buffer
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* @count: Size of the update
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*
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* This function updates the system wide DSCR default value.
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*/
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static ssize_t __used store_dscr_default(struct device *dev,
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struct device_attribute *attr, const char *buf,
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size_t count)
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{
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unsigned long val;
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int ret = 0;
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ret = sscanf(buf, "%lx", &val);
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if (ret != 1)
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return -EINVAL;
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dscr_default = val;
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on_each_cpu(write_dscr, &val, 1);
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return count;
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}
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static DEVICE_ATTR(dscr_default, 0600,
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show_dscr_default, store_dscr_default);
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static void __init sysfs_create_dscr_default(void)
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{
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if (cpu_has_feature(CPU_FTR_DSCR)) {
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int cpu;
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dscr_default = spr_default_dscr;
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for_each_possible_cpu(cpu)
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paca_ptrs[cpu]->dscr_default = dscr_default;
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device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
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}
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}
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#endif /* CONFIG_PPC64 */
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#ifdef CONFIG_PPC_E500
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#define MAX_BIT 63
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static u64 pw20_wt;
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static u64 altivec_idle_wt;
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static unsigned int get_idle_ticks_bit(u64 ns)
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{
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u64 cycle;
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if (ns >= 10000)
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cycle = div_u64(ns + 500, 1000) * tb_ticks_per_usec;
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else
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cycle = div_u64(ns * tb_ticks_per_usec, 1000);
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if (!cycle)
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return 0;
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return ilog2(cycle);
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}
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static void do_show_pwrmgtcr0(void *val)
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{
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u32 *value = val;
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*value = mfspr(SPRN_PWRMGTCR0);
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}
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static ssize_t show_pw20_state(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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u32 value;
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unsigned int cpu = dev->id;
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smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
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value &= PWRMGTCR0_PW20_WAIT;
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return sprintf(buf, "%u\n", value ? 1 : 0);
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}
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static void do_store_pw20_state(void *val)
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{
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u32 *value = val;
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u32 pw20_state;
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pw20_state = mfspr(SPRN_PWRMGTCR0);
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if (*value)
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pw20_state |= PWRMGTCR0_PW20_WAIT;
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else
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pw20_state &= ~PWRMGTCR0_PW20_WAIT;
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mtspr(SPRN_PWRMGTCR0, pw20_state);
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}
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static ssize_t store_pw20_state(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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u32 value;
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unsigned int cpu = dev->id;
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if (kstrtou32(buf, 0, &value))
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return -EINVAL;
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if (value > 1)
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return -EINVAL;
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smp_call_function_single(cpu, do_store_pw20_state, &value, 1);
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return count;
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}
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static ssize_t show_pw20_wait_time(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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u32 value;
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u64 tb_cycle = 1;
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u64 time;
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unsigned int cpu = dev->id;
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if (!pw20_wt) {
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smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
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value = (value & PWRMGTCR0_PW20_ENT) >>
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PWRMGTCR0_PW20_ENT_SHIFT;
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tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
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/* convert ms to ns */
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if (tb_ticks_per_usec > 1000) {
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time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
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} else {
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u32 rem_us;
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time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
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&rem_us);
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time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
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}
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} else {
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time = pw20_wt;
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}
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return sprintf(buf, "%llu\n", time > 0 ? time : 0);
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}
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static void set_pw20_wait_entry_bit(void *val)
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{
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u32 *value = val;
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u32 pw20_idle;
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pw20_idle = mfspr(SPRN_PWRMGTCR0);
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/* Set Automatic PW20 Core Idle Count */
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/* clear count */
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pw20_idle &= ~PWRMGTCR0_PW20_ENT;
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/* set count */
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pw20_idle |= ((MAX_BIT - *value) << PWRMGTCR0_PW20_ENT_SHIFT);
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mtspr(SPRN_PWRMGTCR0, pw20_idle);
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}
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static ssize_t store_pw20_wait_time(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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u32 entry_bit;
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u64 value;
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unsigned int cpu = dev->id;
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if (kstrtou64(buf, 0, &value))
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return -EINVAL;
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if (!value)
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return -EINVAL;
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entry_bit = get_idle_ticks_bit(value);
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if (entry_bit > MAX_BIT)
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return -EINVAL;
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pw20_wt = value;
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smp_call_function_single(cpu, set_pw20_wait_entry_bit,
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&entry_bit, 1);
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return count;
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}
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static ssize_t show_altivec_idle(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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u32 value;
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unsigned int cpu = dev->id;
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smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
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value &= PWRMGTCR0_AV_IDLE_PD_EN;
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return sprintf(buf, "%u\n", value ? 1 : 0);
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}
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static void do_store_altivec_idle(void *val)
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{
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u32 *value = val;
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u32 altivec_idle;
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altivec_idle = mfspr(SPRN_PWRMGTCR0);
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if (*value)
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altivec_idle |= PWRMGTCR0_AV_IDLE_PD_EN;
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else
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altivec_idle &= ~PWRMGTCR0_AV_IDLE_PD_EN;
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mtspr(SPRN_PWRMGTCR0, altivec_idle);
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}
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static ssize_t store_altivec_idle(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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u32 value;
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unsigned int cpu = dev->id;
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if (kstrtou32(buf, 0, &value))
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return -EINVAL;
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if (value > 1)
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return -EINVAL;
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smp_call_function_single(cpu, do_store_altivec_idle, &value, 1);
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return count;
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}
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static ssize_t show_altivec_idle_wait_time(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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u32 value;
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u64 tb_cycle = 1;
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u64 time;
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unsigned int cpu = dev->id;
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if (!altivec_idle_wt) {
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smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
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value = (value & PWRMGTCR0_AV_IDLE_CNT) >>
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PWRMGTCR0_AV_IDLE_CNT_SHIFT;
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tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
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/* convert ms to ns */
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if (tb_ticks_per_usec > 1000) {
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time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
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} else {
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u32 rem_us;
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time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
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&rem_us);
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time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
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}
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} else {
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time = altivec_idle_wt;
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}
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return sprintf(buf, "%llu\n", time > 0 ? time : 0);
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}
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static void set_altivec_idle_wait_entry_bit(void *val)
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{
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u32 *value = val;
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u32 altivec_idle;
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altivec_idle = mfspr(SPRN_PWRMGTCR0);
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/* Set Automatic AltiVec Idle Count */
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/* clear count */
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altivec_idle &= ~PWRMGTCR0_AV_IDLE_CNT;
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/* set count */
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altivec_idle |= ((MAX_BIT - *value) << PWRMGTCR0_AV_IDLE_CNT_SHIFT);
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mtspr(SPRN_PWRMGTCR0, altivec_idle);
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}
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static ssize_t store_altivec_idle_wait_time(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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u32 entry_bit;
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u64 value;
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unsigned int cpu = dev->id;
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if (kstrtou64(buf, 0, &value))
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return -EINVAL;
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if (!value)
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return -EINVAL;
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entry_bit = get_idle_ticks_bit(value);
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if (entry_bit > MAX_BIT)
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return -EINVAL;
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altivec_idle_wt = value;
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smp_call_function_single(cpu, set_altivec_idle_wait_entry_bit,
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&entry_bit, 1);
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return count;
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}
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/*
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* Enable/Disable interface:
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* 0, disable. 1, enable.
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*/
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static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state);
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static DEVICE_ATTR(altivec_idle, 0600, show_altivec_idle, store_altivec_idle);
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/*
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* Set wait time interface:(Nanosecond)
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* Example: Base on TBfreq is 41MHZ.
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* 1~48(ns): TB[63]
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* 49~97(ns): TB[62]
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* 98~195(ns): TB[61]
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* 196~390(ns): TB[60]
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* 391~780(ns): TB[59]
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* 781~1560(ns): TB[58]
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* ...
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*/
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static DEVICE_ATTR(pw20_wait_time, 0600,
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show_pw20_wait_time,
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store_pw20_wait_time);
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static DEVICE_ATTR(altivec_idle_wait_time, 0600,
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show_altivec_idle_wait_time,
|
|
store_altivec_idle_wait_time);
|
|
#endif
|
|
|
|
/*
|
|
* Enabling PMCs will slow partition context switch times so we only do
|
|
* it the first time we write to the PMCs.
|
|
*/
|
|
|
|
static DEFINE_PER_CPU(char, pmcs_enabled);
|
|
|
|
void ppc_enable_pmcs(void)
|
|
{
|
|
ppc_set_pmu_inuse(1);
|
|
|
|
/* Only need to enable them once */
|
|
if (__this_cpu_read(pmcs_enabled))
|
|
return;
|
|
|
|
__this_cpu_write(pmcs_enabled, 1);
|
|
|
|
if (ppc_md.enable_pmcs)
|
|
ppc_md.enable_pmcs();
|
|
}
|
|
EXPORT_SYMBOL(ppc_enable_pmcs);
|
|
|
|
|
|
|
|
/* Let's define all possible registers, we'll only hook up the ones
|
|
* that are implemented on the current processor
|
|
*/
|
|
|
|
#ifdef CONFIG_PMU_SYSFS
|
|
#if defined(CONFIG_PPC64) || defined(CONFIG_PPC_BOOK3S_32)
|
|
#define HAS_PPC_PMC_CLASSIC 1
|
|
#define HAS_PPC_PMC_IBM 1
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#define HAS_PPC_PMC_PA6T 1
|
|
#define HAS_PPC_PMC56 1
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_32
|
|
#define HAS_PPC_PMC_G4 1
|
|
#endif
|
|
#endif /* CONFIG_PMU_SYSFS */
|
|
|
|
#if defined(CONFIG_PPC64) && defined(CONFIG_DEBUG_MISC)
|
|
#define HAS_PPC_PA6T
|
|
#endif
|
|
/*
|
|
* SPRs which are not related to PMU.
|
|
*/
|
|
#ifdef CONFIG_PPC64
|
|
SYSFS_SPRSETUP(purr, SPRN_PURR);
|
|
SYSFS_SPRSETUP(spurr, SPRN_SPURR);
|
|
SYSFS_SPRSETUP(pir, SPRN_PIR);
|
|
SYSFS_SPRSETUP(tscr, SPRN_TSCR);
|
|
|
|
/*
|
|
Lets only enable read for phyp resources and
|
|
enable write when needed with a separate function.
|
|
Lets be conservative and default to pseries.
|
|
*/
|
|
static DEVICE_ATTR(spurr, 0400, show_spurr, NULL);
|
|
static DEVICE_ATTR(purr, 0400, show_purr, store_purr);
|
|
static DEVICE_ATTR(pir, 0400, show_pir, NULL);
|
|
static DEVICE_ATTR(tscr, 0600, show_tscr, store_tscr);
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
#ifdef HAS_PPC_PMC_CLASSIC
|
|
SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
|
|
SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
|
|
SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
|
|
SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
|
|
SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
|
|
SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
|
|
SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
|
|
SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
|
|
#endif
|
|
|
|
#ifdef HAS_PPC_PMC_G4
|
|
SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
|
|
#endif
|
|
|
|
#ifdef HAS_PPC_PMC56
|
|
SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
|
|
SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
|
|
|
|
SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
|
|
SYSFS_PMCSETUP(mmcr3, SPRN_MMCR3);
|
|
|
|
static DEVICE_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
|
|
static DEVICE_ATTR(mmcr3, 0600, show_mmcr3, store_mmcr3);
|
|
#endif /* HAS_PPC_PMC56 */
|
|
|
|
|
|
|
|
|
|
#ifdef HAS_PPC_PMC_PA6T
|
|
SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
|
|
SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
|
|
SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
|
|
SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
|
|
SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
|
|
SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
|
|
#endif
|
|
|
|
#ifdef HAS_PPC_PA6T
|
|
SYSFS_SPRSETUP(hid0, SPRN_HID0);
|
|
SYSFS_SPRSETUP(hid1, SPRN_HID1);
|
|
SYSFS_SPRSETUP(hid4, SPRN_HID4);
|
|
SYSFS_SPRSETUP(hid5, SPRN_HID5);
|
|
SYSFS_SPRSETUP(ima0, SPRN_PA6T_IMA0);
|
|
SYSFS_SPRSETUP(ima1, SPRN_PA6T_IMA1);
|
|
SYSFS_SPRSETUP(ima2, SPRN_PA6T_IMA2);
|
|
SYSFS_SPRSETUP(ima3, SPRN_PA6T_IMA3);
|
|
SYSFS_SPRSETUP(ima4, SPRN_PA6T_IMA4);
|
|
SYSFS_SPRSETUP(ima5, SPRN_PA6T_IMA5);
|
|
SYSFS_SPRSETUP(ima6, SPRN_PA6T_IMA6);
|
|
SYSFS_SPRSETUP(ima7, SPRN_PA6T_IMA7);
|
|
SYSFS_SPRSETUP(ima8, SPRN_PA6T_IMA8);
|
|
SYSFS_SPRSETUP(ima9, SPRN_PA6T_IMA9);
|
|
SYSFS_SPRSETUP(imaat, SPRN_PA6T_IMAAT);
|
|
SYSFS_SPRSETUP(btcr, SPRN_PA6T_BTCR);
|
|
SYSFS_SPRSETUP(pccr, SPRN_PA6T_PCCR);
|
|
SYSFS_SPRSETUP(rpccr, SPRN_PA6T_RPCCR);
|
|
SYSFS_SPRSETUP(der, SPRN_PA6T_DER);
|
|
SYSFS_SPRSETUP(mer, SPRN_PA6T_MER);
|
|
SYSFS_SPRSETUP(ber, SPRN_PA6T_BER);
|
|
SYSFS_SPRSETUP(ier, SPRN_PA6T_IER);
|
|
SYSFS_SPRSETUP(sier, SPRN_PA6T_SIER);
|
|
SYSFS_SPRSETUP(siar, SPRN_PA6T_SIAR);
|
|
SYSFS_SPRSETUP(tsr0, SPRN_PA6T_TSR0);
|
|
SYSFS_SPRSETUP(tsr1, SPRN_PA6T_TSR1);
|
|
SYSFS_SPRSETUP(tsr2, SPRN_PA6T_TSR2);
|
|
SYSFS_SPRSETUP(tsr3, SPRN_PA6T_TSR3);
|
|
#endif /* HAS_PPC_PA6T */
|
|
|
|
#ifdef HAS_PPC_PMC_IBM
|
|
static struct device_attribute ibm_common_attrs[] = {
|
|
__ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
|
|
__ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
|
|
};
|
|
#endif /* HAS_PPC_PMC_IBM */
|
|
|
|
#ifdef HAS_PPC_PMC_G4
|
|
static struct device_attribute g4_common_attrs[] = {
|
|
__ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
|
|
__ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
|
|
__ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
|
|
};
|
|
#endif /* HAS_PPC_PMC_G4 */
|
|
|
|
#ifdef HAS_PPC_PMC_CLASSIC
|
|
static struct device_attribute classic_pmc_attrs[] = {
|
|
__ATTR(pmc1, 0600, show_pmc1, store_pmc1),
|
|
__ATTR(pmc2, 0600, show_pmc2, store_pmc2),
|
|
__ATTR(pmc3, 0600, show_pmc3, store_pmc3),
|
|
__ATTR(pmc4, 0600, show_pmc4, store_pmc4),
|
|
__ATTR(pmc5, 0600, show_pmc5, store_pmc5),
|
|
__ATTR(pmc6, 0600, show_pmc6, store_pmc6),
|
|
#ifdef HAS_PPC_PMC56
|
|
__ATTR(pmc7, 0600, show_pmc7, store_pmc7),
|
|
__ATTR(pmc8, 0600, show_pmc8, store_pmc8),
|
|
#endif
|
|
};
|
|
#endif
|
|
|
|
#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
|
|
static struct device_attribute pa6t_attrs[] = {
|
|
#ifdef HAS_PPC_PMC_PA6T
|
|
__ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
|
|
__ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
|
|
__ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
|
|
__ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
|
|
__ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
|
|
__ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
|
|
__ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
|
|
__ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
|
|
#endif
|
|
#ifdef HAS_PPC_PA6T
|
|
__ATTR(hid0, 0600, show_hid0, store_hid0),
|
|
__ATTR(hid1, 0600, show_hid1, store_hid1),
|
|
__ATTR(hid4, 0600, show_hid4, store_hid4),
|
|
__ATTR(hid5, 0600, show_hid5, store_hid5),
|
|
__ATTR(ima0, 0600, show_ima0, store_ima0),
|
|
__ATTR(ima1, 0600, show_ima1, store_ima1),
|
|
__ATTR(ima2, 0600, show_ima2, store_ima2),
|
|
__ATTR(ima3, 0600, show_ima3, store_ima3),
|
|
__ATTR(ima4, 0600, show_ima4, store_ima4),
|
|
__ATTR(ima5, 0600, show_ima5, store_ima5),
|
|
__ATTR(ima6, 0600, show_ima6, store_ima6),
|
|
__ATTR(ima7, 0600, show_ima7, store_ima7),
|
|
__ATTR(ima8, 0600, show_ima8, store_ima8),
|
|
__ATTR(ima9, 0600, show_ima9, store_ima9),
|
|
__ATTR(imaat, 0600, show_imaat, store_imaat),
|
|
__ATTR(btcr, 0600, show_btcr, store_btcr),
|
|
__ATTR(pccr, 0600, show_pccr, store_pccr),
|
|
__ATTR(rpccr, 0600, show_rpccr, store_rpccr),
|
|
__ATTR(der, 0600, show_der, store_der),
|
|
__ATTR(mer, 0600, show_mer, store_mer),
|
|
__ATTR(ber, 0600, show_ber, store_ber),
|
|
__ATTR(ier, 0600, show_ier, store_ier),
|
|
__ATTR(sier, 0600, show_sier, store_sier),
|
|
__ATTR(siar, 0600, show_siar, store_siar),
|
|
__ATTR(tsr0, 0600, show_tsr0, store_tsr0),
|
|
__ATTR(tsr1, 0600, show_tsr1, store_tsr1),
|
|
__ATTR(tsr2, 0600, show_tsr2, store_tsr2),
|
|
__ATTR(tsr3, 0600, show_tsr3, store_tsr3),
|
|
#endif /* HAS_PPC_PA6T */
|
|
};
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_SVM
|
|
static ssize_t show_svm(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "%u\n", is_secure_guest());
|
|
}
|
|
static DEVICE_ATTR(svm, 0444, show_svm, NULL);
|
|
|
|
static void __init create_svm_file(void)
|
|
{
|
|
device_create_file(cpu_subsys.dev_root, &dev_attr_svm);
|
|
}
|
|
#else
|
|
static void __init create_svm_file(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_PPC_SVM */
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
static void read_idle_purr(void *val)
|
|
{
|
|
u64 *ret = val;
|
|
|
|
*ret = read_this_idle_purr();
|
|
}
|
|
|
|
static ssize_t idle_purr_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct cpu *cpu = container_of(dev, struct cpu, dev);
|
|
u64 val;
|
|
|
|
smp_call_function_single(cpu->dev.id, read_idle_purr, &val, 1);
|
|
return sprintf(buf, "%llx\n", val);
|
|
}
|
|
static DEVICE_ATTR(idle_purr, 0400, idle_purr_show, NULL);
|
|
|
|
static void create_idle_purr_file(struct device *s)
|
|
{
|
|
if (firmware_has_feature(FW_FEATURE_LPAR))
|
|
device_create_file(s, &dev_attr_idle_purr);
|
|
}
|
|
|
|
static void remove_idle_purr_file(struct device *s)
|
|
{
|
|
if (firmware_has_feature(FW_FEATURE_LPAR))
|
|
device_remove_file(s, &dev_attr_idle_purr);
|
|
}
|
|
|
|
static void read_idle_spurr(void *val)
|
|
{
|
|
u64 *ret = val;
|
|
|
|
*ret = read_this_idle_spurr();
|
|
}
|
|
|
|
static ssize_t idle_spurr_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct cpu *cpu = container_of(dev, struct cpu, dev);
|
|
u64 val;
|
|
|
|
smp_call_function_single(cpu->dev.id, read_idle_spurr, &val, 1);
|
|
return sprintf(buf, "%llx\n", val);
|
|
}
|
|
static DEVICE_ATTR(idle_spurr, 0400, idle_spurr_show, NULL);
|
|
|
|
static void create_idle_spurr_file(struct device *s)
|
|
{
|
|
if (firmware_has_feature(FW_FEATURE_LPAR))
|
|
device_create_file(s, &dev_attr_idle_spurr);
|
|
}
|
|
|
|
static void remove_idle_spurr_file(struct device *s)
|
|
{
|
|
if (firmware_has_feature(FW_FEATURE_LPAR))
|
|
device_remove_file(s, &dev_attr_idle_spurr);
|
|
}
|
|
|
|
#else /* CONFIG_PPC_PSERIES */
|
|
#define create_idle_purr_file(s)
|
|
#define remove_idle_purr_file(s)
|
|
#define create_idle_spurr_file(s)
|
|
#define remove_idle_spurr_file(s)
|
|
#endif /* CONFIG_PPC_PSERIES */
|
|
|
|
static int register_cpu_online(unsigned int cpu)
|
|
{
|
|
struct cpu *c = &per_cpu(cpu_devices, cpu);
|
|
struct device *s = &c->dev;
|
|
struct device_attribute *attrs, *pmc_attrs;
|
|
int i, nattrs;
|
|
|
|
/* For cpus present at boot a reference was already grabbed in register_cpu() */
|
|
if (!s->of_node)
|
|
s->of_node = of_get_cpu_node(cpu, NULL);
|
|
|
|
#ifdef CONFIG_PPC64
|
|
if (cpu_has_feature(CPU_FTR_SMT))
|
|
device_create_file(s, &dev_attr_smt_snooze_delay);
|
|
#endif
|
|
|
|
/* PMC stuff */
|
|
switch (cur_cpu_spec->pmc_type) {
|
|
#ifdef HAS_PPC_PMC_IBM
|
|
case PPC_PMC_IBM:
|
|
attrs = ibm_common_attrs;
|
|
nattrs = ARRAY_SIZE(ibm_common_attrs);
|
|
pmc_attrs = classic_pmc_attrs;
|
|
break;
|
|
#endif /* HAS_PPC_PMC_IBM */
|
|
#ifdef HAS_PPC_PMC_G4
|
|
case PPC_PMC_G4:
|
|
attrs = g4_common_attrs;
|
|
nattrs = ARRAY_SIZE(g4_common_attrs);
|
|
pmc_attrs = classic_pmc_attrs;
|
|
break;
|
|
#endif /* HAS_PPC_PMC_G4 */
|
|
#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
|
|
case PPC_PMC_PA6T:
|
|
/* PA Semi starts counting at PMC0 */
|
|
attrs = pa6t_attrs;
|
|
nattrs = ARRAY_SIZE(pa6t_attrs);
|
|
pmc_attrs = NULL;
|
|
break;
|
|
#endif
|
|
default:
|
|
attrs = NULL;
|
|
nattrs = 0;
|
|
pmc_attrs = NULL;
|
|
}
|
|
|
|
for (i = 0; i < nattrs; i++)
|
|
device_create_file(s, &attrs[i]);
|
|
|
|
if (pmc_attrs)
|
|
for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
|
|
device_create_file(s, &pmc_attrs[i]);
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#ifdef CONFIG_PMU_SYSFS
|
|
if (cpu_has_feature(CPU_FTR_MMCRA))
|
|
device_create_file(s, &dev_attr_mmcra);
|
|
|
|
if (cpu_has_feature(CPU_FTR_ARCH_31))
|
|
device_create_file(s, &dev_attr_mmcr3);
|
|
#endif /* CONFIG_PMU_SYSFS */
|
|
|
|
if (cpu_has_feature(CPU_FTR_PURR)) {
|
|
if (!firmware_has_feature(FW_FEATURE_LPAR))
|
|
add_write_permission_dev_attr(&dev_attr_purr);
|
|
device_create_file(s, &dev_attr_purr);
|
|
create_idle_purr_file(s);
|
|
}
|
|
|
|
if (cpu_has_feature(CPU_FTR_SPURR)) {
|
|
device_create_file(s, &dev_attr_spurr);
|
|
create_idle_spurr_file(s);
|
|
}
|
|
|
|
if (cpu_has_feature(CPU_FTR_DSCR))
|
|
device_create_file(s, &dev_attr_dscr);
|
|
|
|
if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
|
|
device_create_file(s, &dev_attr_pir);
|
|
|
|
if (cpu_has_feature(CPU_FTR_ARCH_206) &&
|
|
!firmware_has_feature(FW_FEATURE_LPAR))
|
|
device_create_file(s, &dev_attr_tscr);
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
#ifdef CONFIG_PPC_E500
|
|
if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
|
|
device_create_file(s, &dev_attr_pw20_state);
|
|
device_create_file(s, &dev_attr_pw20_wait_time);
|
|
|
|
device_create_file(s, &dev_attr_altivec_idle);
|
|
device_create_file(s, &dev_attr_altivec_idle_wait_time);
|
|
}
|
|
#endif
|
|
cacheinfo_cpu_online(cpu);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
static int unregister_cpu_online(unsigned int cpu)
|
|
{
|
|
struct cpu *c = &per_cpu(cpu_devices, cpu);
|
|
struct device *s = &c->dev;
|
|
struct device_attribute *attrs, *pmc_attrs;
|
|
int i, nattrs;
|
|
|
|
if (WARN_RATELIMIT(!c->hotpluggable, "cpu %d can't be offlined\n", cpu))
|
|
return -EBUSY;
|
|
|
|
#ifdef CONFIG_PPC64
|
|
if (cpu_has_feature(CPU_FTR_SMT))
|
|
device_remove_file(s, &dev_attr_smt_snooze_delay);
|
|
#endif
|
|
|
|
/* PMC stuff */
|
|
switch (cur_cpu_spec->pmc_type) {
|
|
#ifdef HAS_PPC_PMC_IBM
|
|
case PPC_PMC_IBM:
|
|
attrs = ibm_common_attrs;
|
|
nattrs = ARRAY_SIZE(ibm_common_attrs);
|
|
pmc_attrs = classic_pmc_attrs;
|
|
break;
|
|
#endif /* HAS_PPC_PMC_IBM */
|
|
#ifdef HAS_PPC_PMC_G4
|
|
case PPC_PMC_G4:
|
|
attrs = g4_common_attrs;
|
|
nattrs = ARRAY_SIZE(g4_common_attrs);
|
|
pmc_attrs = classic_pmc_attrs;
|
|
break;
|
|
#endif /* HAS_PPC_PMC_G4 */
|
|
#if defined(HAS_PPC_PMC_PA6T) || defined(HAS_PPC_PA6T)
|
|
case PPC_PMC_PA6T:
|
|
/* PA Semi starts counting at PMC0 */
|
|
attrs = pa6t_attrs;
|
|
nattrs = ARRAY_SIZE(pa6t_attrs);
|
|
pmc_attrs = NULL;
|
|
break;
|
|
#endif
|
|
default:
|
|
attrs = NULL;
|
|
nattrs = 0;
|
|
pmc_attrs = NULL;
|
|
}
|
|
|
|
for (i = 0; i < nattrs; i++)
|
|
device_remove_file(s, &attrs[i]);
|
|
|
|
if (pmc_attrs)
|
|
for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
|
|
device_remove_file(s, &pmc_attrs[i]);
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#ifdef CONFIG_PMU_SYSFS
|
|
if (cpu_has_feature(CPU_FTR_MMCRA))
|
|
device_remove_file(s, &dev_attr_mmcra);
|
|
|
|
if (cpu_has_feature(CPU_FTR_ARCH_31))
|
|
device_remove_file(s, &dev_attr_mmcr3);
|
|
#endif /* CONFIG_PMU_SYSFS */
|
|
|
|
if (cpu_has_feature(CPU_FTR_PURR)) {
|
|
device_remove_file(s, &dev_attr_purr);
|
|
remove_idle_purr_file(s);
|
|
}
|
|
|
|
if (cpu_has_feature(CPU_FTR_SPURR)) {
|
|
device_remove_file(s, &dev_attr_spurr);
|
|
remove_idle_spurr_file(s);
|
|
}
|
|
|
|
if (cpu_has_feature(CPU_FTR_DSCR))
|
|
device_remove_file(s, &dev_attr_dscr);
|
|
|
|
if (cpu_has_feature(CPU_FTR_PPCAS_ARCH_V2))
|
|
device_remove_file(s, &dev_attr_pir);
|
|
|
|
if (cpu_has_feature(CPU_FTR_ARCH_206) &&
|
|
!firmware_has_feature(FW_FEATURE_LPAR))
|
|
device_remove_file(s, &dev_attr_tscr);
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
#ifdef CONFIG_PPC_E500
|
|
if (PVR_VER(cur_cpu_spec->pvr_value) == PVR_VER_E6500) {
|
|
device_remove_file(s, &dev_attr_pw20_state);
|
|
device_remove_file(s, &dev_attr_pw20_wait_time);
|
|
|
|
device_remove_file(s, &dev_attr_altivec_idle);
|
|
device_remove_file(s, &dev_attr_altivec_idle_wait_time);
|
|
}
|
|
#endif
|
|
cacheinfo_cpu_offline(cpu);
|
|
of_node_put(s->of_node);
|
|
s->of_node = NULL;
|
|
return 0;
|
|
}
|
|
#else /* !CONFIG_HOTPLUG_CPU */
|
|
#define unregister_cpu_online NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
|
|
ssize_t arch_cpu_probe(const char *buf, size_t count)
|
|
{
|
|
if (ppc_md.cpu_probe)
|
|
return ppc_md.cpu_probe(buf, count);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
ssize_t arch_cpu_release(const char *buf, size_t count)
|
|
{
|
|
if (ppc_md.cpu_release)
|
|
return ppc_md.cpu_release(buf, count);
|
|
|
|
return -EINVAL;
|
|
}
|
|
#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
|
|
|
|
static DEFINE_MUTEX(cpu_mutex);
|
|
|
|
int cpu_add_dev_attr(struct device_attribute *attr)
|
|
{
|
|
int cpu;
|
|
|
|
mutex_lock(&cpu_mutex);
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
device_create_file(get_cpu_device(cpu), attr);
|
|
}
|
|
|
|
mutex_unlock(&cpu_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cpu_add_dev_attr);
|
|
|
|
int cpu_add_dev_attr_group(struct attribute_group *attrs)
|
|
{
|
|
int cpu;
|
|
struct device *dev;
|
|
int ret;
|
|
|
|
mutex_lock(&cpu_mutex);
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
dev = get_cpu_device(cpu);
|
|
ret = sysfs_create_group(&dev->kobj, attrs);
|
|
WARN_ON(ret != 0);
|
|
}
|
|
|
|
mutex_unlock(&cpu_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cpu_add_dev_attr_group);
|
|
|
|
|
|
void cpu_remove_dev_attr(struct device_attribute *attr)
|
|
{
|
|
int cpu;
|
|
|
|
mutex_lock(&cpu_mutex);
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
device_remove_file(get_cpu_device(cpu), attr);
|
|
}
|
|
|
|
mutex_unlock(&cpu_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(cpu_remove_dev_attr);
|
|
|
|
void cpu_remove_dev_attr_group(struct attribute_group *attrs)
|
|
{
|
|
int cpu;
|
|
struct device *dev;
|
|
|
|
mutex_lock(&cpu_mutex);
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
dev = get_cpu_device(cpu);
|
|
sysfs_remove_group(&dev->kobj, attrs);
|
|
}
|
|
|
|
mutex_unlock(&cpu_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(cpu_remove_dev_attr_group);
|
|
|
|
|
|
/* NUMA stuff */
|
|
|
|
#ifdef CONFIG_NUMA
|
|
int sysfs_add_device_to_node(struct device *dev, int nid)
|
|
{
|
|
struct node *node = node_devices[nid];
|
|
return sysfs_create_link(&node->dev.kobj, &dev->kobj,
|
|
kobject_name(&dev->kobj));
|
|
}
|
|
EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
|
|
|
|
void sysfs_remove_device_from_node(struct device *dev, int nid)
|
|
{
|
|
struct node *node = node_devices[nid];
|
|
sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
|
|
}
|
|
EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
|
|
#endif
|
|
|
|
/* Only valid if CPU is present. */
|
|
static ssize_t show_physical_id(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct cpu *cpu = container_of(dev, struct cpu, dev);
|
|
|
|
return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->dev.id));
|
|
}
|
|
static DEVICE_ATTR(physical_id, 0444, show_physical_id, NULL);
|
|
|
|
static int __init topology_init(void)
|
|
{
|
|
int cpu, r;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
struct cpu *c = &per_cpu(cpu_devices, cpu);
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
/*
|
|
* For now, we just see if the system supports making
|
|
* the RTAS calls for CPU hotplug. But, there may be a
|
|
* more comprehensive way to do this for an individual
|
|
* CPU. For instance, the boot cpu might never be valid
|
|
* for hotplugging.
|
|
*/
|
|
if (smp_ops && smp_ops->cpu_offline_self)
|
|
c->hotpluggable = 1;
|
|
#endif
|
|
|
|
if (cpu_online(cpu) || c->hotpluggable) {
|
|
register_cpu(c, cpu);
|
|
|
|
device_create_file(&c->dev, &dev_attr_physical_id);
|
|
}
|
|
}
|
|
r = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powerpc/topology:online",
|
|
register_cpu_online, unregister_cpu_online);
|
|
WARN_ON(r < 0);
|
|
#ifdef CONFIG_PPC64
|
|
sysfs_create_dscr_default();
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
create_svm_file();
|
|
|
|
return 0;
|
|
}
|
|
subsys_initcall(topology_init);
|