Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1191 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
new file mode 100644
index 000000000..d36e71ba0
--- /dev/null
+++ b/arch/powerpc/kernel/sysfs.c
@@ -0,0 +1,1191 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/device.h>
+#include <linux/cpu.h>
+#include <linux/smp.h>
+#include <linux/percpu.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/export.h>
+#include <linux/nodemask.h>
+#include <linux/cpumask.h>
+#include <linux/notifier.h>
+
+#include <asm/current.h>
+#include <asm/processor.h>
+#include <asm/cputable.h>
+#include <asm/hvcall.h>
+#include <asm/prom.h>
+#include <asm/machdep.h>
+#include <asm/smp.h>
+#include <asm/pmc.h>
+#include <asm/firmware.h>
+#include <asm/idle.h>
+#include <asm/svm.h>
+
+#include "cacheinfo.h"
+#include "setup.h"
+
+#ifdef CONFIG_PPC64
+#include <asm/paca.h>
+#include <asm/lppaca.h>
+#endif
+
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+#ifdef CONFIG_PPC64
+
+/*
+ * Snooze delay has not been hooked up since 3fa8cad82b94 ("powerpc/pseries/cpuidle:
+ * smt-snooze-delay cleanup.") and has been broken even longer. As was foretold in
+ * 2014:
+ *
+ *  "ppc64_util currently utilises it. Once we fix ppc64_util, propose to clean
+ *  up the kernel code."
+ *
+ * powerpc-utils stopped using it as of 1.3.8. At some point in the future this
+ * code should be removed.
+ */
+
+static ssize_t store_smt_snooze_delay(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf,
+				      size_t count)
+{
+	pr_warn_once("%s (%d) stored to unsupported smt_snooze_delay, which has no effect.\n",
+		     current->comm, current->pid);
+	return count;
+}
+
+static ssize_t show_smt_snooze_delay(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf)
+{
+	pr_warn_once("%s (%d) read from unsupported smt_snooze_delay\n",
+		     current->comm, current->pid);
+	return sprintf(buf, "100\n");
+}
+
+static DEVICE_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
+		   store_smt_snooze_delay);
+
+static int __init setup_smt_snooze_delay(char *str)
+{
+	if (!cpu_has_feature(CPU_FTR_SMT))
+		return 1;
+
+	pr_warn("smt-snooze-delay command line option has no effect\n");
+	return 1;
+}
+__setup("smt-snooze-delay=", setup_smt_snooze_delay);
+
+#endif /* CONFIG_PPC64 */
+
+#define __SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, EXTRA) \
+static void read_##NAME(void *val) \
+{ \
+	*(unsigned long *)val = mfspr(ADDRESS);	\
+} \
+static void write_##NAME(void *val) \
+{ \
+	EXTRA; \
+	mtspr(ADDRESS, *(unsigned long *)val);	\
+}
+
+#define __SYSFS_SPRSETUP_SHOW_STORE(NAME) \
+static ssize_t show_##NAME(struct device *dev, \
+			struct device_attribute *attr, \
+			char *buf) \
+{ \
+	struct cpu *cpu = container_of(dev, struct cpu, dev); \
+	unsigned long val; \
+	smp_call_function_single(cpu->dev.id, read_##NAME, &val, 1);	\
+	return sprintf(buf, "%lx\n", val); \
+} \
+static ssize_t __used \
+	store_##NAME(struct device *dev, struct device_attribute *attr, \
+			const char *buf, size_t count) \
+{ \
+	struct cpu *cpu = container_of(dev, struct cpu, dev); \
+	unsigned long val; \
+	int ret = sscanf(buf, "%lx", &val); \
+	if (ret != 1) \
+		return -EINVAL; \
+	smp_call_function_single(cpu->dev.id, write_##NAME, &val, 1); \
+	return count; \
+}
+
+#define SYSFS_PMCSETUP(NAME, ADDRESS) \
+	__SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ppc_enable_pmcs()) \
+	__SYSFS_SPRSETUP_SHOW_STORE(NAME)
+#define SYSFS_SPRSETUP(NAME, ADDRESS) \
+	__SYSFS_SPRSETUP_READ_WRITE(NAME, ADDRESS, ) \
+	__SYSFS_SPRSETUP_SHOW_STORE(NAME)
+
+#define SYSFS_SPRSETUP_SHOW_STORE(NAME) \
+	__SYSFS_SPRSETUP_SHOW_STORE(NAME)
+
+#ifdef CONFIG_PPC64
+
+/*
+ * This is the system wide DSCR register default value. Any
+ * change to this default value through the sysfs interface
+ * will update all per cpu DSCR default values across the
+ * system stored in their respective PACA structures.
+ */
+static unsigned long dscr_default;
+
+/**
+ * read_dscr() - Fetch the cpu specific DSCR default
+ * @val:	Returned cpu specific DSCR default value
+ *
+ * This function returns the per cpu DSCR default value
+ * for any cpu which is contained in it's PACA structure.
+ */
+static void read_dscr(void *val)
+{
+	*(unsigned long *)val = get_paca()->dscr_default;
+}
+
+
+/**
+ * write_dscr() - Update the cpu specific DSCR default
+ * @val:	New cpu specific DSCR default value to update
+ *
+ * This function updates the per cpu DSCR default value
+ * for any cpu which is contained in it's PACA structure.
+ */
+static void write_dscr(void *val)
+{
+	get_paca()->dscr_default = *(unsigned long *)val;
+	if (!current->thread.dscr_inherit) {
+		current->thread.dscr = *(unsigned long *)val;
+		mtspr(SPRN_DSCR, *(unsigned long *)val);
+	}
+}
+
+SYSFS_SPRSETUP_SHOW_STORE(dscr);
+static DEVICE_ATTR(dscr, 0600, show_dscr, store_dscr);
+
+static void add_write_permission_dev_attr(struct device_attribute *attr)
+{
+	attr->attr.mode |= 0200;
+}
+
+/**
+ * show_dscr_default() - Fetch the system wide DSCR default
+ * @dev:	Device structure
+ * @attr:	Device attribute structure
+ * @buf:	Interface buffer
+ *
+ * This function returns the system wide DSCR default value.
+ */
+static ssize_t show_dscr_default(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%lx\n", dscr_default);
+}
+
+/**
+ * store_dscr_default() - Update the system wide DSCR default
+ * @dev:	Device structure
+ * @attr:	Device attribute structure
+ * @buf:	Interface buffer
+ * @count:	Size of the update
+ *
+ * This function updates the system wide DSCR default value.
+ */
+static ssize_t __used store_dscr_default(struct device *dev,
+		struct device_attribute *attr, const char *buf,
+		size_t count)
+{
+	unsigned long val;
+	int ret = 0;
+
+	ret = sscanf(buf, "%lx", &val);
+	if (ret != 1)
+		return -EINVAL;
+	dscr_default = val;
+
+	on_each_cpu(write_dscr, &val, 1);
+
+	return count;
+}
+
+static DEVICE_ATTR(dscr_default, 0600,
+		show_dscr_default, store_dscr_default);
+
+static void sysfs_create_dscr_default(void)
+{
+	if (cpu_has_feature(CPU_FTR_DSCR)) {
+		int cpu;
+
+		dscr_default = spr_default_dscr;
+		for_each_possible_cpu(cpu)
+			paca_ptrs[cpu]->dscr_default = dscr_default;
+
+		device_create_file(cpu_subsys.dev_root, &dev_attr_dscr_default);
+	}
+}
+#endif /* CONFIG_PPC64 */
+
+#ifdef CONFIG_PPC_FSL_BOOK3E
+#define MAX_BIT				63
+
+static u64 pw20_wt;
+static u64 altivec_idle_wt;
+
+static unsigned int get_idle_ticks_bit(u64 ns)
+{
+	u64 cycle;
+
+	if (ns >= 10000)
+		cycle = div_u64(ns + 500, 1000) * tb_ticks_per_usec;
+	else
+		cycle = div_u64(ns * tb_ticks_per_usec, 1000);
+
+	if (!cycle)
+		return 0;
+
+	return ilog2(cycle);
+}
+
+static void do_show_pwrmgtcr0(void *val)
+{
+	u32 *value = val;
+
+	*value = mfspr(SPRN_PWRMGTCR0);
+}
+
+static ssize_t show_pw20_state(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	u32 value;
+	unsigned int cpu = dev->id;
+
+	smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
+
+	value &= PWRMGTCR0_PW20_WAIT;
+
+	return sprintf(buf, "%u\n", value ? 1 : 0);
+}
+
+static void do_store_pw20_state(void *val)
+{
+	u32 *value = val;
+	u32 pw20_state;
+
+	pw20_state = mfspr(SPRN_PWRMGTCR0);
+
+	if (*value)
+		pw20_state |= PWRMGTCR0_PW20_WAIT;
+	else
+		pw20_state &= ~PWRMGTCR0_PW20_WAIT;
+
+	mtspr(SPRN_PWRMGTCR0, pw20_state);
+}
+
+static ssize_t store_pw20_state(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	u32 value;
+	unsigned int cpu = dev->id;
+
+	if (kstrtou32(buf, 0, &value))
+		return -EINVAL;
+
+	if (value > 1)
+		return -EINVAL;
+
+	smp_call_function_single(cpu, do_store_pw20_state, &value, 1);
+
+	return count;
+}
+
+static ssize_t show_pw20_wait_time(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	u32 value;
+	u64 tb_cycle = 1;
+	u64 time;
+
+	unsigned int cpu = dev->id;
+
+	if (!pw20_wt) {
+		smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
+		value = (value & PWRMGTCR0_PW20_ENT) >>
+					PWRMGTCR0_PW20_ENT_SHIFT;
+
+		tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
+		/* convert ms to ns */
+		if (tb_ticks_per_usec > 1000) {
+			time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
+		} else {
+			u32 rem_us;
+
+			time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
+						&rem_us);
+			time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
+		}
+	} else {
+		time = pw20_wt;
+	}
+
+	return sprintf(buf, "%llu\n", time > 0 ? time : 0);
+}
+
+static void set_pw20_wait_entry_bit(void *val)
+{
+	u32 *value = val;
+	u32 pw20_idle;
+
+	pw20_idle = mfspr(SPRN_PWRMGTCR0);
+
+	/* Set Automatic PW20 Core Idle Count */
+	/* clear count */
+	pw20_idle &= ~PWRMGTCR0_PW20_ENT;
+
+	/* set count */
+	pw20_idle |= ((MAX_BIT - *value) << PWRMGTCR0_PW20_ENT_SHIFT);
+
+	mtspr(SPRN_PWRMGTCR0, pw20_idle);
+}
+
+static ssize_t store_pw20_wait_time(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	u32 entry_bit;
+	u64 value;
+
+	unsigned int cpu = dev->id;
+
+	if (kstrtou64(buf, 0, &value))
+		return -EINVAL;
+
+	if (!value)
+		return -EINVAL;
+
+	entry_bit = get_idle_ticks_bit(value);
+	if (entry_bit > MAX_BIT)
+		return -EINVAL;
+
+	pw20_wt = value;
+
+	smp_call_function_single(cpu, set_pw20_wait_entry_bit,
+				&entry_bit, 1);
+
+	return count;
+}
+
+static ssize_t show_altivec_idle(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	u32 value;
+	unsigned int cpu = dev->id;
+
+	smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
+
+	value &= PWRMGTCR0_AV_IDLE_PD_EN;
+
+	return sprintf(buf, "%u\n", value ? 1 : 0);
+}
+
+static void do_store_altivec_idle(void *val)
+{
+	u32 *value = val;
+	u32 altivec_idle;
+
+	altivec_idle = mfspr(SPRN_PWRMGTCR0);
+
+	if (*value)
+		altivec_idle |= PWRMGTCR0_AV_IDLE_PD_EN;
+	else
+		altivec_idle &= ~PWRMGTCR0_AV_IDLE_PD_EN;
+
+	mtspr(SPRN_PWRMGTCR0, altivec_idle);
+}
+
+static ssize_t store_altivec_idle(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	u32 value;
+	unsigned int cpu = dev->id;
+
+	if (kstrtou32(buf, 0, &value))
+		return -EINVAL;
+
+	if (value > 1)
+		return -EINVAL;
+
+	smp_call_function_single(cpu, do_store_altivec_idle, &value, 1);
+
+	return count;
+}
+
+static ssize_t show_altivec_idle_wait_time(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	u32 value;
+	u64 tb_cycle = 1;
+	u64 time;
+
+	unsigned int cpu = dev->id;
+
+	if (!altivec_idle_wt) {
+		smp_call_function_single(cpu, do_show_pwrmgtcr0, &value, 1);
+		value = (value & PWRMGTCR0_AV_IDLE_CNT) >>
+					PWRMGTCR0_AV_IDLE_CNT_SHIFT;
+
+		tb_cycle = (tb_cycle << (MAX_BIT - value + 1));
+		/* convert ms to ns */
+		if (tb_ticks_per_usec > 1000) {
+			time = div_u64(tb_cycle, tb_ticks_per_usec / 1000);
+		} else {
+			u32 rem_us;
+
+			time = div_u64_rem(tb_cycle, tb_ticks_per_usec,
+						&rem_us);
+			time = time * 1000 + rem_us * 1000 / tb_ticks_per_usec;
+		}
+	} else {
+		time = altivec_idle_wt;
+	}
+
+	return sprintf(buf, "%llu\n", time > 0 ? time : 0);
+}
+
+static void set_altivec_idle_wait_entry_bit(void *val)
+{
+	u32 *value = val;
+	u32 altivec_idle;
+
+	altivec_idle = mfspr(SPRN_PWRMGTCR0);
+
+	/* Set Automatic AltiVec Idle Count */
+	/* clear count */
+	altivec_idle &= ~PWRMGTCR0_AV_IDLE_CNT;
+
+	/* set count */
+	altivec_idle |= ((MAX_BIT - *value) << PWRMGTCR0_AV_IDLE_CNT_SHIFT);
+
+	mtspr(SPRN_PWRMGTCR0, altivec_idle);
+}
+
+static ssize_t store_altivec_idle_wait_time(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	u32 entry_bit;
+	u64 value;
+
+	unsigned int cpu = dev->id;
+
+	if (kstrtou64(buf, 0, &value))
+		return -EINVAL;
+
+	if (!value)
+		return -EINVAL;
+
+	entry_bit = get_idle_ticks_bit(value);
+	if (entry_bit > MAX_BIT)
+		return -EINVAL;
+
+	altivec_idle_wt = value;
+
+	smp_call_function_single(cpu, set_altivec_idle_wait_entry_bit,
+				&entry_bit, 1);
+
+	return count;
+}
+
+/*
+ * Enable/Disable interface:
+ * 0, disable. 1, enable.
+ */
+static DEVICE_ATTR(pw20_state, 0600, show_pw20_state, store_pw20_state);
+static DEVICE_ATTR(altivec_idle, 0600, show_altivec_idle, store_altivec_idle);
+
+/*
+ * Set wait time interface:(Nanosecond)
+ * Example: Base on TBfreq is 41MHZ.
+ * 1~48(ns): TB[63]
+ * 49~97(ns): TB[62]
+ * 98~195(ns): TB[61]
+ * 196~390(ns): TB[60]
+ * 391~780(ns): TB[59]
+ * 781~1560(ns): TB[58]
+ * ...
+ */
+static DEVICE_ATTR(pw20_wait_time, 0600,
+			show_pw20_wait_time,
+			store_pw20_wait_time);
+static DEVICE_ATTR(altivec_idle_wait_time, 0600,
+			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 create_svm_file(void)
+{
+	device_create_file(cpu_subsys.dev_root, &dev_attr_svm);
+}
+#else
+static void 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 = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
+		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 = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
+		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 = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
+		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_FSL_BOOK3E
+	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;
+
+	BUG_ON(!c->hotpluggable);
+
+#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 = sizeof(ibm_common_attrs) / sizeof(struct device_attribute);
+		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 = sizeof(g4_common_attrs) / sizeof(struct device_attribute);
+		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 = sizeof(pa6t_attrs) / sizeof(struct device_attribute);
+		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_FSL_BOOK3E
+	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
+static void register_nodes(void)
+{
+	int i;
+
+	for (i = 0; i < MAX_NUMNODES; i++)
+		register_one_node(i);
+}
+
+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);
+
+#else
+static void register_nodes(void)
+{
+	return;
+}
+
+#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;
+
+	register_nodes();
+
+	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);