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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 | // SPDX-License-Identifier: GPL-2.0 /* sysfs.c: Topology sysfs support code for sparc64. * * Copyright (C) 2007 David S. Miller <davem@davemloft.net> */ #include <linux/sched.h> #include <linux/device.h> #include <linux/cpu.h> #include <linux/smp.h> #include <linux/percpu.h> #include <linux/init.h> #include <asm/cpudata.h> #include <asm/hypervisor.h> #include <asm/spitfire.h> static DEFINE_PER_CPU(struct hv_mmu_statistics, mmu_stats) __attribute__((aligned(64))); #define SHOW_MMUSTAT_ULONG(NAME) \ static ssize_t show_##NAME(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \ return sprintf(buf, "%lu\n", p->NAME); \ } \ static DEVICE_ATTR(NAME, 0444, show_##NAME, NULL) SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_8k_tte); SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_8k_tte); SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_64k_tte); SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_64k_tte); SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_4mb_tte); SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_4mb_tte); SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_256mb_tte); SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_256mb_tte); SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_8k_tte); SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_8k_tte); SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_64k_tte); SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_64k_tte); SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_4mb_tte); SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_4mb_tte); SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_256mb_tte); SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_256mb_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_8k_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_8k_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_64k_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_64k_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_4mb_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_4mb_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_256mb_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_256mb_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_8k_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_8k_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_64k_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_64k_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_4mb_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_4mb_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_256mb_tte); SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_256mb_tte); static struct attribute *mmu_stat_attrs[] = { &dev_attr_immu_tsb_hits_ctx0_8k_tte.attr, &dev_attr_immu_tsb_ticks_ctx0_8k_tte.attr, &dev_attr_immu_tsb_hits_ctx0_64k_tte.attr, &dev_attr_immu_tsb_ticks_ctx0_64k_tte.attr, &dev_attr_immu_tsb_hits_ctx0_4mb_tte.attr, &dev_attr_immu_tsb_ticks_ctx0_4mb_tte.attr, &dev_attr_immu_tsb_hits_ctx0_256mb_tte.attr, &dev_attr_immu_tsb_ticks_ctx0_256mb_tte.attr, &dev_attr_immu_tsb_hits_ctxnon0_8k_tte.attr, &dev_attr_immu_tsb_ticks_ctxnon0_8k_tte.attr, &dev_attr_immu_tsb_hits_ctxnon0_64k_tte.attr, &dev_attr_immu_tsb_ticks_ctxnon0_64k_tte.attr, &dev_attr_immu_tsb_hits_ctxnon0_4mb_tte.attr, &dev_attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr, &dev_attr_immu_tsb_hits_ctxnon0_256mb_tte.attr, &dev_attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr, &dev_attr_dmmu_tsb_hits_ctx0_8k_tte.attr, &dev_attr_dmmu_tsb_ticks_ctx0_8k_tte.attr, &dev_attr_dmmu_tsb_hits_ctx0_64k_tte.attr, &dev_attr_dmmu_tsb_ticks_ctx0_64k_tte.attr, &dev_attr_dmmu_tsb_hits_ctx0_4mb_tte.attr, &dev_attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr, &dev_attr_dmmu_tsb_hits_ctx0_256mb_tte.attr, &dev_attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr, &dev_attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr, &dev_attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr, &dev_attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr, &dev_attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr, &dev_attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr, &dev_attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr, &dev_attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr, &dev_attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr, NULL, }; static struct attribute_group mmu_stat_group = { .attrs = mmu_stat_attrs, .name = "mmu_stats", }; static long read_mmustat_enable(void *data __maybe_unused) { unsigned long ra = 0; sun4v_mmustat_info(&ra); return ra != 0; } static long write_mmustat_enable(void *data) { unsigned long ra, orig_ra, *val = data; if (*val) ra = __pa(&per_cpu(mmu_stats, smp_processor_id())); else ra = 0UL; return sun4v_mmustat_conf(ra, &orig_ra); } static ssize_t show_mmustat_enable(struct device *s, struct device_attribute *attr, char *buf) { long val = work_on_cpu(s->id, read_mmustat_enable, NULL); return sprintf(buf, "%lx\n", val); } static ssize_t store_mmustat_enable(struct device *s, struct device_attribute *attr, const char *buf, size_t count) { unsigned long val; long err; int ret; ret = sscanf(buf, "%lu", &val); if (ret != 1) return -EINVAL; err = work_on_cpu(s->id, write_mmustat_enable, &val); if (err) return -EIO; return count; } static DEVICE_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable); static int mmu_stats_supported; static int register_mmu_stats(struct device *s) { if (!mmu_stats_supported) return 0; device_create_file(s, &dev_attr_mmustat_enable); return sysfs_create_group(&s->kobj, &mmu_stat_group); } #ifdef CONFIG_HOTPLUG_CPU static void unregister_mmu_stats(struct device *s) { if (!mmu_stats_supported) return; sysfs_remove_group(&s->kobj, &mmu_stat_group); device_remove_file(s, &dev_attr_mmustat_enable); } #endif #define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \ static ssize_t show_##NAME(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ cpuinfo_sparc *c = &cpu_data(dev->id); \ return sprintf(buf, "%lu\n", c->MEMBER); \ } #define SHOW_CPUDATA_UINT_NAME(NAME, MEMBER) \ static ssize_t show_##NAME(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ cpuinfo_sparc *c = &cpu_data(dev->id); \ return sprintf(buf, "%u\n", c->MEMBER); \ } SHOW_CPUDATA_ULONG_NAME(clock_tick, clock_tick); SHOW_CPUDATA_UINT_NAME(l1_dcache_size, dcache_size); SHOW_CPUDATA_UINT_NAME(l1_dcache_line_size, dcache_line_size); SHOW_CPUDATA_UINT_NAME(l1_icache_size, icache_size); SHOW_CPUDATA_UINT_NAME(l1_icache_line_size, icache_line_size); SHOW_CPUDATA_UINT_NAME(l2_cache_size, ecache_size); SHOW_CPUDATA_UINT_NAME(l2_cache_line_size, ecache_line_size); static struct device_attribute cpu_core_attrs[] = { __ATTR(clock_tick, 0444, show_clock_tick, NULL), __ATTR(l1_dcache_size, 0444, show_l1_dcache_size, NULL), __ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL), __ATTR(l1_icache_size, 0444, show_l1_icache_size, NULL), __ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL), __ATTR(l2_cache_size, 0444, show_l2_cache_size, NULL), __ATTR(l2_cache_line_size, 0444, show_l2_cache_line_size, NULL), }; static DEFINE_PER_CPU(struct cpu, cpu_devices); static int register_cpu_online(unsigned int cpu) { struct cpu *c = &per_cpu(cpu_devices, cpu); struct device *s = &c->dev; int i; for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++) device_create_file(s, &cpu_core_attrs[i]); register_mmu_stats(s); return 0; } static int unregister_cpu_online(unsigned int cpu) { #ifdef CONFIG_HOTPLUG_CPU struct cpu *c = &per_cpu(cpu_devices, cpu); struct device *s = &c->dev; int i; unregister_mmu_stats(s); for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++) device_remove_file(s, &cpu_core_attrs[i]); #endif return 0; } static void __init check_mmu_stats(void) { unsigned long dummy1, err; if (tlb_type != hypervisor) return; err = sun4v_mmustat_info(&dummy1); if (!err) mmu_stats_supported = 1; } static int __init topology_init(void) { int cpu, ret; check_mmu_stats(); for_each_possible_cpu(cpu) { struct cpu *c = &per_cpu(cpu_devices, cpu); register_cpu(c, cpu); } ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "sparc/topology:online", register_cpu_online, unregister_cpu_online); WARN_ON(ret < 0); return 0; } subsys_initcall(topology_init); |