// SPDX-License-Identifier: GPL-2.0-only #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cacheinfo.h" #include "setup.h" #ifdef CONFIG_PPC64 #include #include #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 its 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 its 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 __init sysfs_create_dscr_default(void) { if (cpu_has_feature(CPU_FTR_DSCR)) { struct device *dev_root; int cpu; dscr_default = spr_default_dscr; for_each_possible_cpu(cpu) paca_ptrs[cpu]->dscr_default = dscr_default; dev_root = bus_get_dev_root(&cpu_subsys); if (dev_root) { device_create_file(dev_root, &dev_attr_dscr_default); put_device(dev_root); } } } #endif /* CONFIG_PPC64 */ #ifdef CONFIG_PPC_E500 #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 __init create_svm_file(void) { struct device *dev_root = bus_get_dev_root(&cpu_subsys); if (dev_root) { device_create_file(dev_root, &dev_attr_svm); put_device(dev_root); } } #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);