Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* smp.c: Sparc64 SMP support. |
| 2 | * |
David S. Miller | cf3d7c1 | 2008-03-26 01:11:55 -0700 | [diff] [blame] | 3 | * Copyright (C) 1997, 2007, 2008 David S. Miller (davem@davemloft.net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/module.h> |
| 7 | #include <linux/kernel.h> |
| 8 | #include <linux/sched.h> |
| 9 | #include <linux/mm.h> |
| 10 | #include <linux/pagemap.h> |
| 11 | #include <linux/threads.h> |
| 12 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/interrupt.h> |
| 14 | #include <linux/kernel_stat.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/spinlock.h> |
| 18 | #include <linux/fs.h> |
| 19 | #include <linux/seq_file.h> |
| 20 | #include <linux/cache.h> |
| 21 | #include <linux/jiffies.h> |
| 22 | #include <linux/profile.h> |
David S. Miller | 73fffc0 | 2009-04-01 16:15:20 -0700 | [diff] [blame] | 23 | #include <linux/bootmem.h> |
David S. Miller | 4fd78a5 | 2009-04-08 20:32:02 -0700 | [diff] [blame] | 24 | #include <linux/vmalloc.h> |
David S. Miller | 9960e9e | 2010-04-07 04:41:33 -0700 | [diff] [blame] | 25 | #include <linux/ftrace.h> |
David S. Miller | 82960b8 | 2008-10-12 20:55:24 -0700 | [diff] [blame] | 26 | #include <linux/cpu.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <asm/head.h> |
| 30 | #include <asm/ptrace.h> |
| 31 | #include <asm/atomic.h> |
| 32 | #include <asm/tlbflush.h> |
| 33 | #include <asm/mmu_context.h> |
| 34 | #include <asm/cpudata.h> |
David S. Miller | 27a2ef3 | 2007-07-14 00:58:53 -0700 | [diff] [blame] | 35 | #include <asm/hvtramp.h> |
| 36 | #include <asm/io.h> |
David S. Miller | cf3d7c1 | 2008-03-26 01:11:55 -0700 | [diff] [blame] | 37 | #include <asm/timer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #include <asm/irq.h> |
Al Viro | 6d24c8d | 2006-10-08 08:23:28 -0400 | [diff] [blame] | 40 | #include <asm/irq_regs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <asm/page.h> |
| 42 | #include <asm/pgtable.h> |
| 43 | #include <asm/oplib.h> |
| 44 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <asm/starfire.h> |
| 46 | #include <asm/tlb.h> |
David S. Miller | 56fb4df | 2006-02-26 23:24:22 -0800 | [diff] [blame] | 47 | #include <asm/sections.h> |
David S. Miller | 07f8e5f | 2006-06-21 23:34:02 -0700 | [diff] [blame] | 48 | #include <asm/prom.h> |
David S. Miller | 5cbc307 | 2007-05-25 15:49:59 -0700 | [diff] [blame] | 49 | #include <asm/mdesc.h> |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 50 | #include <asm/ldc.h> |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 51 | #include <asm/hypervisor.h> |
David S. Miller | b62818e | 2011-02-15 15:04:07 -0800 | [diff] [blame] | 52 | #include <asm/pcr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Hong H. Pham | 280ff97 | 2009-06-04 02:10:11 -0700 | [diff] [blame] | 54 | #include "cpumap.h" |
| 55 | |
David S. Miller | a2f9f6b | 2007-06-04 21:48:33 -0700 | [diff] [blame] | 56 | int sparc64_multi_core __read_mostly; |
| 57 | |
Mike Travis | d5a7430 | 2007-10-16 01:24:05 -0700 | [diff] [blame] | 58 | DEFINE_PER_CPU(cpumask_t, cpu_sibling_map) = CPU_MASK_NONE; |
David S. Miller | f78eae2 | 2007-06-04 17:01:39 -0700 | [diff] [blame] | 59 | cpumask_t cpu_core_map[NR_CPUS] __read_mostly = |
| 60 | { [0 ... NR_CPUS-1] = CPU_MASK_NONE }; |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 61 | |
Mike Travis | d5a7430 | 2007-10-16 01:24:05 -0700 | [diff] [blame] | 62 | EXPORT_PER_CPU_SYMBOL(cpu_sibling_map); |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 63 | EXPORT_SYMBOL(cpu_core_map); |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | static cpumask_t smp_commenced_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | void smp_info(struct seq_file *m) |
| 68 | { |
| 69 | int i; |
| 70 | |
| 71 | seq_printf(m, "State:\n"); |
Andrew Morton | 394e390 | 2006-03-23 03:01:05 -0800 | [diff] [blame] | 72 | for_each_online_cpu(i) |
| 73 | seq_printf(m, "CPU%d:\t\tonline\n", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | void smp_bogo(struct seq_file *m) |
| 77 | { |
| 78 | int i; |
| 79 | |
Andrew Morton | 394e390 | 2006-03-23 03:01:05 -0800 | [diff] [blame] | 80 | for_each_online_cpu(i) |
| 81 | seq_printf(m, |
Andrew Morton | 394e390 | 2006-03-23 03:01:05 -0800 | [diff] [blame] | 82 | "Cpu%dClkTck\t: %016lx\n", |
Andrew Morton | 394e390 | 2006-03-23 03:01:05 -0800 | [diff] [blame] | 83 | i, cpu_data(i).clock_tick); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
David S. Miller | 112f487 | 2007-03-05 15:28:37 -0800 | [diff] [blame] | 86 | extern void setup_sparc64_timer(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | static volatile unsigned long callin_flag = 0; |
| 89 | |
Sam Ravnborg | 0f7f22d | 2008-02-20 22:22:16 -0800 | [diff] [blame] | 90 | void __cpuinit smp_callin(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | { |
| 92 | int cpuid = hard_smp_processor_id(); |
| 93 | |
David S. Miller | 56fb4df | 2006-02-26 23:24:22 -0800 | [diff] [blame] | 94 | __local_per_cpu_offset = __per_cpu_offset(cpuid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
David S. Miller | 4a07e64 | 2006-02-14 13:49:32 -0800 | [diff] [blame] | 96 | if (tlb_type == hypervisor) |
David S. Miller | 490384e | 2006-02-11 14:41:18 -0800 | [diff] [blame] | 97 | sun4v_ktsb_register(); |
David S. Miller | 481295f | 2006-02-07 21:51:08 -0800 | [diff] [blame] | 98 | |
David S. Miller | 56fb4df | 2006-02-26 23:24:22 -0800 | [diff] [blame] | 99 | __flush_tlb_all(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
David S. Miller | 112f487 | 2007-03-05 15:28:37 -0800 | [diff] [blame] | 101 | setup_sparc64_timer(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
David S. Miller | 816242d | 2005-05-23 15:52:08 -0700 | [diff] [blame] | 103 | if (cheetah_pcache_forced_on) |
| 104 | cheetah_enable_pcache(); |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | local_irq_enable(); |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | callin_flag = 1; |
| 109 | __asm__ __volatile__("membar #Sync\n\t" |
| 110 | "flush %%g6" : : : "memory"); |
| 111 | |
| 112 | /* Clear this or we will die instantly when we |
| 113 | * schedule back to this idler... |
| 114 | */ |
David S. Miller | db7d9a4 | 2005-07-24 19:36:26 -0700 | [diff] [blame] | 115 | current_thread_info()->new_child = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
| 117 | /* Attach to the address space of init_task. */ |
| 118 | atomic_inc(&init_mm.mm_count); |
| 119 | current->active_mm = &init_mm; |
| 120 | |
David S. Miller | 82960b8 | 2008-10-12 20:55:24 -0700 | [diff] [blame] | 121 | /* inform the notifiers about the new cpu */ |
| 122 | notify_cpu_starting(cpuid); |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | while (!cpu_isset(cpuid, smp_commenced_mask)) |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 125 | rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
David S. Miller | 8e255ba | 2009-04-08 21:06:35 -0700 | [diff] [blame] | 127 | ipi_call_lock_irq(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | cpu_set(cpuid, cpu_online_map); |
David S. Miller | 8e255ba | 2009-04-08 21:06:35 -0700 | [diff] [blame] | 129 | ipi_call_unlock_irq(); |
Nick Piggin | 5bfb5d6 | 2005-11-08 21:39:01 -0800 | [diff] [blame] | 130 | |
| 131 | /* idle thread is expected to have preempt disabled */ |
| 132 | preempt_disable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | void cpu_panic(void) |
| 136 | { |
| 137 | printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id()); |
| 138 | panic("SMP bolixed\n"); |
| 139 | } |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | /* This tick register synchronization scheme is taken entirely from |
| 142 | * the ia64 port, see arch/ia64/kernel/smpboot.c for details and credit. |
| 143 | * |
| 144 | * The only change I've made is to rework it so that the master |
| 145 | * initiates the synchonization instead of the slave. -DaveM |
| 146 | */ |
| 147 | |
| 148 | #define MASTER 0 |
| 149 | #define SLAVE (SMP_CACHE_BYTES/sizeof(unsigned long)) |
| 150 | |
| 151 | #define NUM_ROUNDS 64 /* magic value */ |
| 152 | #define NUM_ITERS 5 /* likewise */ |
| 153 | |
| 154 | static DEFINE_SPINLOCK(itc_sync_lock); |
| 155 | static unsigned long go[SLAVE + 1]; |
| 156 | |
| 157 | #define DEBUG_TICK_SYNC 0 |
| 158 | |
| 159 | static inline long get_delta (long *rt, long *master) |
| 160 | { |
| 161 | unsigned long best_t0 = 0, best_t1 = ~0UL, best_tm = 0; |
| 162 | unsigned long tcenter, t0, t1, tm; |
| 163 | unsigned long i; |
| 164 | |
| 165 | for (i = 0; i < NUM_ITERS; i++) { |
| 166 | t0 = tick_ops->get_tick(); |
| 167 | go[MASTER] = 1; |
David S. Miller | 293666b | 2008-11-15 13:33:25 -0800 | [diff] [blame] | 168 | membar_safe("#StoreLoad"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | while (!(tm = go[SLAVE])) |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 170 | rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | go[SLAVE] = 0; |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 172 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | t1 = tick_ops->get_tick(); |
| 174 | |
| 175 | if (t1 - t0 < best_t1 - best_t0) |
| 176 | best_t0 = t0, best_t1 = t1, best_tm = tm; |
| 177 | } |
| 178 | |
| 179 | *rt = best_t1 - best_t0; |
| 180 | *master = best_tm - best_t0; |
| 181 | |
| 182 | /* average best_t0 and best_t1 without overflow: */ |
| 183 | tcenter = (best_t0/2 + best_t1/2); |
| 184 | if (best_t0 % 2 + best_t1 % 2 == 2) |
| 185 | tcenter++; |
| 186 | return tcenter - best_tm; |
| 187 | } |
| 188 | |
| 189 | void smp_synchronize_tick_client(void) |
| 190 | { |
| 191 | long i, delta, adj, adjust_latency = 0, done = 0; |
David S. Miller | c6fee08 | 2011-02-26 23:40:02 -0800 | [diff] [blame] | 192 | unsigned long flags, rt, master_time_stamp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | #if DEBUG_TICK_SYNC |
| 194 | struct { |
| 195 | long rt; /* roundtrip time */ |
| 196 | long master; /* master's timestamp */ |
| 197 | long diff; /* difference between midpoint and master's timestamp */ |
| 198 | long lat; /* estimate of itc adjustment latency */ |
| 199 | } t[NUM_ROUNDS]; |
| 200 | #endif |
| 201 | |
| 202 | go[MASTER] = 1; |
| 203 | |
| 204 | while (go[MASTER]) |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 205 | rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | local_irq_save(flags); |
| 208 | { |
| 209 | for (i = 0; i < NUM_ROUNDS; i++) { |
| 210 | delta = get_delta(&rt, &master_time_stamp); |
David S. Miller | c6fee08 | 2011-02-26 23:40:02 -0800 | [diff] [blame] | 211 | if (delta == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | done = 1; /* let's lock on to this... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
| 214 | if (!done) { |
| 215 | if (i > 0) { |
| 216 | adjust_latency += -delta; |
| 217 | adj = -delta + adjust_latency/4; |
| 218 | } else |
| 219 | adj = -delta; |
| 220 | |
David S. Miller | 112f487 | 2007-03-05 15:28:37 -0800 | [diff] [blame] | 221 | tick_ops->add_tick(adj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | } |
| 223 | #if DEBUG_TICK_SYNC |
| 224 | t[i].rt = rt; |
| 225 | t[i].master = master_time_stamp; |
| 226 | t[i].diff = delta; |
| 227 | t[i].lat = adjust_latency/4; |
| 228 | #endif |
| 229 | } |
| 230 | } |
| 231 | local_irq_restore(flags); |
| 232 | |
| 233 | #if DEBUG_TICK_SYNC |
| 234 | for (i = 0; i < NUM_ROUNDS; i++) |
| 235 | printk("rt=%5ld master=%5ld diff=%5ld adjlat=%5ld\n", |
| 236 | t[i].rt, t[i].master, t[i].diff, t[i].lat); |
| 237 | #endif |
| 238 | |
Joe Perches | 519c4d2 | 2007-11-19 23:43:00 -0800 | [diff] [blame] | 239 | printk(KERN_INFO "CPU %d: synchronized TICK with master CPU " |
| 240 | "(last diff %ld cycles, maxerr %lu cycles)\n", |
| 241 | smp_processor_id(), delta, rt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | static void smp_start_sync_tick_client(int cpu); |
| 245 | |
| 246 | static void smp_synchronize_one_tick(int cpu) |
| 247 | { |
| 248 | unsigned long flags, i; |
| 249 | |
| 250 | go[MASTER] = 0; |
| 251 | |
| 252 | smp_start_sync_tick_client(cpu); |
| 253 | |
| 254 | /* wait for client to be ready */ |
| 255 | while (!go[MASTER]) |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 256 | rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | /* now let the client proceed into his loop */ |
| 259 | go[MASTER] = 0; |
David S. Miller | 293666b | 2008-11-15 13:33:25 -0800 | [diff] [blame] | 260 | membar_safe("#StoreLoad"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | spin_lock_irqsave(&itc_sync_lock, flags); |
| 263 | { |
| 264 | for (i = 0; i < NUM_ROUNDS*NUM_ITERS; i++) { |
| 265 | while (!go[MASTER]) |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 266 | rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | go[MASTER] = 0; |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 268 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | go[SLAVE] = tick_ops->get_tick(); |
David S. Miller | 293666b | 2008-11-15 13:33:25 -0800 | [diff] [blame] | 270 | membar_safe("#StoreLoad"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
| 272 | } |
| 273 | spin_unlock_irqrestore(&itc_sync_lock, flags); |
| 274 | } |
| 275 | |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 276 | #if defined(CONFIG_SUN_LDOMS) && defined(CONFIG_HOTPLUG_CPU) |
David S. Miller | 27a2ef3 | 2007-07-14 00:58:53 -0700 | [diff] [blame] | 277 | /* XXX Put this in some common place. XXX */ |
| 278 | static unsigned long kimage_addr_to_ra(void *p) |
| 279 | { |
| 280 | unsigned long val = (unsigned long) p; |
| 281 | |
| 282 | return kern_base + (val - KERNBASE); |
| 283 | } |
| 284 | |
David S. Miller | 557fe0e | 2009-03-31 17:15:40 -0700 | [diff] [blame] | 285 | static void __cpuinit ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg, void **descrp) |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 286 | { |
| 287 | extern unsigned long sparc64_ttable_tl0; |
| 288 | extern unsigned long kern_locked_tte_data; |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 289 | struct hvtramp_descr *hdesc; |
| 290 | unsigned long trampoline_ra; |
| 291 | struct trap_per_cpu *tb; |
| 292 | u64 tte_vaddr, tte_data; |
| 293 | unsigned long hv_err; |
David S. Miller | 6465874 | 2008-03-21 17:01:38 -0700 | [diff] [blame] | 294 | int i; |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 295 | |
David S. Miller | 6465874 | 2008-03-21 17:01:38 -0700 | [diff] [blame] | 296 | hdesc = kzalloc(sizeof(*hdesc) + |
| 297 | (sizeof(struct hvtramp_mapping) * |
| 298 | num_kernel_image_mappings - 1), |
| 299 | GFP_KERNEL); |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 300 | if (!hdesc) { |
David S. Miller | 27a2ef3 | 2007-07-14 00:58:53 -0700 | [diff] [blame] | 301 | printk(KERN_ERR "ldom_startcpu_cpuid: Cannot allocate " |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 302 | "hvtramp_descr.\n"); |
| 303 | return; |
| 304 | } |
David S. Miller | 557fe0e | 2009-03-31 17:15:40 -0700 | [diff] [blame] | 305 | *descrp = hdesc; |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 306 | |
| 307 | hdesc->cpu = cpu; |
David S. Miller | 6465874 | 2008-03-21 17:01:38 -0700 | [diff] [blame] | 308 | hdesc->num_mappings = num_kernel_image_mappings; |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 309 | |
| 310 | tb = &trap_block[cpu]; |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 311 | |
| 312 | hdesc->fault_info_va = (unsigned long) &tb->fault_info; |
| 313 | hdesc->fault_info_pa = kimage_addr_to_ra(&tb->fault_info); |
| 314 | |
| 315 | hdesc->thread_reg = thread_reg; |
| 316 | |
| 317 | tte_vaddr = (unsigned long) KERNBASE; |
| 318 | tte_data = kern_locked_tte_data; |
| 319 | |
David S. Miller | 6465874 | 2008-03-21 17:01:38 -0700 | [diff] [blame] | 320 | for (i = 0; i < hdesc->num_mappings; i++) { |
| 321 | hdesc->maps[i].vaddr = tte_vaddr; |
| 322 | hdesc->maps[i].tte = tte_data; |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 323 | tte_vaddr += 0x400000; |
| 324 | tte_data += 0x400000; |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | trampoline_ra = kimage_addr_to_ra(hv_cpu_startup); |
| 328 | |
| 329 | hv_err = sun4v_cpu_start(cpu, trampoline_ra, |
| 330 | kimage_addr_to_ra(&sparc64_ttable_tl0), |
| 331 | __pa(hdesc)); |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 332 | if (hv_err) |
| 333 | printk(KERN_ERR "ldom_startcpu_cpuid: sun4v_cpu_start() " |
| 334 | "gives error %lu\n", hv_err); |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 335 | } |
| 336 | #endif |
| 337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | extern unsigned long sparc64_cpu_startup; |
| 339 | |
| 340 | /* The OBP cpu startup callback truncates the 3rd arg cookie to |
| 341 | * 32-bits (I think) so to be safe we have it read the pointer |
| 342 | * contained here so we work on >4GB machines. -DaveM |
| 343 | */ |
| 344 | static struct thread_info *cpu_new_thread = NULL; |
| 345 | |
Al Viro | 8c29890 | 2008-11-22 17:34:04 +0000 | [diff] [blame] | 346 | static int __cpuinit smp_boot_one_cpu(unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
| 348 | unsigned long entry = |
| 349 | (unsigned long)(&sparc64_cpu_startup); |
| 350 | unsigned long cookie = |
| 351 | (unsigned long)(&cpu_new_thread); |
| 352 | struct task_struct *p; |
David S. Miller | 557fe0e | 2009-03-31 17:15:40 -0700 | [diff] [blame] | 353 | void *descr = NULL; |
David S. Miller | 7890f79 | 2006-02-15 02:26:54 -0800 | [diff] [blame] | 354 | int timeout, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | p = fork_idle(cpu); |
Akinobu Mita | 1177bf9 | 2007-10-04 14:55:59 -0700 | [diff] [blame] | 357 | if (IS_ERR(p)) |
| 358 | return PTR_ERR(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | callin_flag = 0; |
Al Viro | f316964 | 2006-01-12 01:05:42 -0800 | [diff] [blame] | 360 | cpu_new_thread = task_thread_info(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
David S. Miller | 7890f79 | 2006-02-15 02:26:54 -0800 | [diff] [blame] | 362 | if (tlb_type == hypervisor) { |
David S. Miller | b14f5c1 | 2007-07-14 00:45:16 -0700 | [diff] [blame] | 363 | #if defined(CONFIG_SUN_LDOMS) && defined(CONFIG_HOTPLUG_CPU) |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 364 | if (ldom_domaining_enabled) |
| 365 | ldom_startcpu_cpuid(cpu, |
David S. Miller | 557fe0e | 2009-03-31 17:15:40 -0700 | [diff] [blame] | 366 | (unsigned long) cpu_new_thread, |
| 367 | &descr); |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 368 | else |
| 369 | #endif |
| 370 | prom_startcpu_cpuid(cpu, entry, cookie); |
David S. Miller | 7890f79 | 2006-02-15 02:26:54 -0800 | [diff] [blame] | 371 | } else { |
David S. Miller | 5cbc307 | 2007-05-25 15:49:59 -0700 | [diff] [blame] | 372 | struct device_node *dp = of_find_node_by_cpuid(cpu); |
David S. Miller | 7890f79 | 2006-02-15 02:26:54 -0800 | [diff] [blame] | 373 | |
Grant Likely | 6016a36 | 2010-01-28 14:06:53 -0700 | [diff] [blame] | 374 | prom_startcpu(dp->phandle, entry, cookie); |
David S. Miller | 7890f79 | 2006-02-15 02:26:54 -0800 | [diff] [blame] | 375 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 377 | for (timeout = 0; timeout < 50000; timeout++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | if (callin_flag) |
| 379 | break; |
| 380 | udelay(100); |
| 381 | } |
David S. Miller | 72aff53 | 2006-02-17 01:29:17 -0800 | [diff] [blame] | 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | if (callin_flag) { |
| 384 | ret = 0; |
| 385 | } else { |
| 386 | printk("Processor %d is stuck.\n", cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | ret = -ENODEV; |
| 388 | } |
| 389 | cpu_new_thread = NULL; |
| 390 | |
David S. Miller | 557fe0e | 2009-03-31 17:15:40 -0700 | [diff] [blame] | 391 | kfree(descr); |
David S. Miller | b37d40d | 2007-07-15 01:08:03 -0700 | [diff] [blame] | 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | return ret; |
| 394 | } |
| 395 | |
| 396 | static void spitfire_xcall_helper(u64 data0, u64 data1, u64 data2, u64 pstate, unsigned long cpu) |
| 397 | { |
| 398 | u64 result, target; |
| 399 | int stuck, tmp; |
| 400 | |
| 401 | if (this_is_starfire) { |
| 402 | /* map to real upaid */ |
| 403 | cpu = (((cpu & 0x3c) << 1) | |
| 404 | ((cpu & 0x40) >> 4) | |
| 405 | (cpu & 0x3)); |
| 406 | } |
| 407 | |
| 408 | target = (cpu << 14) | 0x70; |
| 409 | again: |
| 410 | /* Ok, this is the real Spitfire Errata #54. |
| 411 | * One must read back from a UDB internal register |
| 412 | * after writes to the UDB interrupt dispatch, but |
| 413 | * before the membar Sync for that write. |
| 414 | * So we use the high UDB control register (ASI 0x7f, |
| 415 | * ADDR 0x20) for the dummy read. -DaveM |
| 416 | */ |
| 417 | tmp = 0x40; |
| 418 | __asm__ __volatile__( |
| 419 | "wrpr %1, %2, %%pstate\n\t" |
| 420 | "stxa %4, [%0] %3\n\t" |
| 421 | "stxa %5, [%0+%8] %3\n\t" |
| 422 | "add %0, %8, %0\n\t" |
| 423 | "stxa %6, [%0+%8] %3\n\t" |
| 424 | "membar #Sync\n\t" |
| 425 | "stxa %%g0, [%7] %3\n\t" |
| 426 | "membar #Sync\n\t" |
| 427 | "mov 0x20, %%g1\n\t" |
| 428 | "ldxa [%%g1] 0x7f, %%g0\n\t" |
| 429 | "membar #Sync" |
| 430 | : "=r" (tmp) |
| 431 | : "r" (pstate), "i" (PSTATE_IE), "i" (ASI_INTR_W), |
| 432 | "r" (data0), "r" (data1), "r" (data2), "r" (target), |
| 433 | "r" (0x10), "0" (tmp) |
| 434 | : "g1"); |
| 435 | |
| 436 | /* NOTE: PSTATE_IE is still clear. */ |
| 437 | stuck = 100000; |
| 438 | do { |
| 439 | __asm__ __volatile__("ldxa [%%g0] %1, %0" |
| 440 | : "=r" (result) |
| 441 | : "i" (ASI_INTR_DISPATCH_STAT)); |
| 442 | if (result == 0) { |
| 443 | __asm__ __volatile__("wrpr %0, 0x0, %%pstate" |
| 444 | : : "r" (pstate)); |
| 445 | return; |
| 446 | } |
| 447 | stuck -= 1; |
| 448 | if (stuck == 0) |
| 449 | break; |
| 450 | } while (result & 0x1); |
| 451 | __asm__ __volatile__("wrpr %0, 0x0, %%pstate" |
| 452 | : : "r" (pstate)); |
| 453 | if (stuck == 0) { |
Sam Ravnborg | 9018113 | 2009-01-06 13:19:28 -0800 | [diff] [blame] | 454 | printk("CPU[%d]: mondo stuckage result[%016llx]\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | smp_processor_id(), result); |
| 456 | } else { |
| 457 | udelay(2); |
| 458 | goto again; |
| 459 | } |
| 460 | } |
| 461 | |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 462 | static void spitfire_xcall_deliver(struct trap_per_cpu *tb, int cnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 464 | u64 *mondo, data0, data1, data2; |
| 465 | u16 *cpu_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | u64 pstate; |
| 467 | int i; |
| 468 | |
| 469 | __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate)); |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 470 | cpu_list = __va(tb->cpu_list_pa); |
| 471 | mondo = __va(tb->cpu_mondo_block_pa); |
| 472 | data0 = mondo[0]; |
| 473 | data1 = mondo[1]; |
| 474 | data2 = mondo[2]; |
| 475 | for (i = 0; i < cnt; i++) |
| 476 | spitfire_xcall_helper(data0, data1, data2, pstate, cpu_list[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | /* Cheetah now allows to send the whole 64-bytes of data in the interrupt |
| 480 | * packet, but we have no use for that. However we do take advantage of |
| 481 | * the new pipelining feature (ie. dispatch to multiple cpus simultaneously). |
| 482 | */ |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 483 | static void cheetah_xcall_deliver(struct trap_per_cpu *tb, int cnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | { |
David S. Miller | 22adb35 | 2007-05-26 01:14:43 -0700 | [diff] [blame] | 485 | int nack_busy_id, is_jbus, need_more; |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 486 | u64 *mondo, pstate, ver, busy_mask; |
| 487 | u16 *cpu_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 489 | cpu_list = __va(tb->cpu_list_pa); |
| 490 | mondo = __va(tb->cpu_mondo_block_pa); |
David S. Miller | cd5bc89 | 2008-08-03 23:24:26 -0700 | [diff] [blame] | 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | /* Unfortunately, someone at Sun had the brilliant idea to make the |
| 493 | * busy/nack fields hard-coded by ITID number for this Ultra-III |
| 494 | * derivative processor. |
| 495 | */ |
| 496 | __asm__ ("rdpr %%ver, %0" : "=r" (ver)); |
David S. Miller | 92704a1 | 2006-02-26 23:27:19 -0800 | [diff] [blame] | 497 | is_jbus = ((ver >> 32) == __JALAPENO_ID || |
| 498 | (ver >> 32) == __SERRANO_ID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
| 500 | __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate)); |
| 501 | |
| 502 | retry: |
David S. Miller | 22adb35 | 2007-05-26 01:14:43 -0700 | [diff] [blame] | 503 | need_more = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | __asm__ __volatile__("wrpr %0, %1, %%pstate\n\t" |
| 505 | : : "r" (pstate), "i" (PSTATE_IE)); |
| 506 | |
| 507 | /* Setup the dispatch data registers. */ |
| 508 | __asm__ __volatile__("stxa %0, [%3] %6\n\t" |
| 509 | "stxa %1, [%4] %6\n\t" |
| 510 | "stxa %2, [%5] %6\n\t" |
| 511 | "membar #Sync\n\t" |
| 512 | : /* no outputs */ |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 513 | : "r" (mondo[0]), "r" (mondo[1]), "r" (mondo[2]), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | "r" (0x40), "r" (0x50), "r" (0x60), |
| 515 | "i" (ASI_INTR_W)); |
| 516 | |
| 517 | nack_busy_id = 0; |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 518 | busy_mask = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | { |
| 520 | int i; |
| 521 | |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 522 | for (i = 0; i < cnt; i++) { |
| 523 | u64 target, nr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 525 | nr = cpu_list[i]; |
| 526 | if (nr == 0xffff) |
| 527 | continue; |
| 528 | |
| 529 | target = (nr << 14) | 0x70; |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 530 | if (is_jbus) { |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 531 | busy_mask |= (0x1UL << (nr * 2)); |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 532 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | target |= (nack_busy_id << 24); |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 534 | busy_mask |= (0x1UL << |
| 535 | (nack_busy_id * 2)); |
| 536 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | __asm__ __volatile__( |
| 538 | "stxa %%g0, [%0] %1\n\t" |
| 539 | "membar #Sync\n\t" |
| 540 | : /* no outputs */ |
| 541 | : "r" (target), "i" (ASI_INTR_W)); |
| 542 | nack_busy_id++; |
David S. Miller | 22adb35 | 2007-05-26 01:14:43 -0700 | [diff] [blame] | 543 | if (nack_busy_id == 32) { |
| 544 | need_more = 1; |
| 545 | break; |
| 546 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | } |
| 548 | } |
| 549 | |
| 550 | /* Now, poll for completion. */ |
| 551 | { |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 552 | u64 dispatch_stat, nack_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | long stuck; |
| 554 | |
| 555 | stuck = 100000 * nack_busy_id; |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 556 | nack_mask = busy_mask << 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | do { |
| 558 | __asm__ __volatile__("ldxa [%%g0] %1, %0" |
| 559 | : "=r" (dispatch_stat) |
| 560 | : "i" (ASI_INTR_DISPATCH_STAT)); |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 561 | if (!(dispatch_stat & (busy_mask | nack_mask))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | __asm__ __volatile__("wrpr %0, 0x0, %%pstate" |
| 563 | : : "r" (pstate)); |
David S. Miller | 22adb35 | 2007-05-26 01:14:43 -0700 | [diff] [blame] | 564 | if (unlikely(need_more)) { |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 565 | int i, this_cnt = 0; |
| 566 | for (i = 0; i < cnt; i++) { |
| 567 | if (cpu_list[i] == 0xffff) |
| 568 | continue; |
| 569 | cpu_list[i] = 0xffff; |
| 570 | this_cnt++; |
| 571 | if (this_cnt == 32) |
David S. Miller | 22adb35 | 2007-05-26 01:14:43 -0700 | [diff] [blame] | 572 | break; |
| 573 | } |
| 574 | goto retry; |
| 575 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | return; |
| 577 | } |
| 578 | if (!--stuck) |
| 579 | break; |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 580 | } while (dispatch_stat & busy_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | |
| 582 | __asm__ __volatile__("wrpr %0, 0x0, %%pstate" |
| 583 | : : "r" (pstate)); |
| 584 | |
David S. Miller | 0de56d1 | 2007-12-12 07:31:46 -0800 | [diff] [blame] | 585 | if (dispatch_stat & busy_mask) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | /* Busy bits will not clear, continue instead |
| 587 | * of freezing up on this cpu. |
| 588 | */ |
Sam Ravnborg | 9018113 | 2009-01-06 13:19:28 -0800 | [diff] [blame] | 589 | printk("CPU[%d]: mondo stuckage result[%016llx]\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | smp_processor_id(), dispatch_stat); |
| 591 | } else { |
| 592 | int i, this_busy_nack = 0; |
| 593 | |
| 594 | /* Delay some random time with interrupts enabled |
| 595 | * to prevent deadlock. |
| 596 | */ |
| 597 | udelay(2 * nack_busy_id); |
| 598 | |
| 599 | /* Clear out the mask bits for cpus which did not |
| 600 | * NACK us. |
| 601 | */ |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 602 | for (i = 0; i < cnt; i++) { |
| 603 | u64 check_mask, nr; |
| 604 | |
| 605 | nr = cpu_list[i]; |
| 606 | if (nr == 0xffff) |
| 607 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
David S. Miller | 92704a1 | 2006-02-26 23:27:19 -0800 | [diff] [blame] | 609 | if (is_jbus) |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 610 | check_mask = (0x2UL << (2*nr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | else |
| 612 | check_mask = (0x2UL << |
| 613 | this_busy_nack); |
| 614 | if ((dispatch_stat & check_mask) == 0) |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 615 | cpu_list[i] = 0xffff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | this_busy_nack += 2; |
David S. Miller | 22adb35 | 2007-05-26 01:14:43 -0700 | [diff] [blame] | 617 | if (this_busy_nack == 64) |
| 618 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | } |
| 620 | |
| 621 | goto retry; |
| 622 | } |
| 623 | } |
| 624 | } |
| 625 | |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 626 | /* Multi-cpu list version. */ |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 627 | static void hypervisor_xcall_deliver(struct trap_per_cpu *tb, int cnt) |
David S. Miller | a43fe0e | 2006-02-04 03:10:53 -0800 | [diff] [blame] | 628 | { |
David S. Miller | ed4d9c6 | 2008-08-04 16:47:57 -0700 | [diff] [blame] | 629 | int retries, this_cpu, prev_sent, i, saw_cpu_error; |
David S. Miller | c02a511 | 2008-08-04 16:18:40 -0700 | [diff] [blame] | 630 | unsigned long status; |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 631 | u16 *cpu_list; |
David S. Miller | 17f34f0 | 2007-05-14 02:01:52 -0700 | [diff] [blame] | 632 | |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 633 | this_cpu = smp_processor_id(); |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 634 | |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 635 | cpu_list = __va(tb->cpu_list_pa); |
| 636 | |
David S. Miller | ed4d9c6 | 2008-08-04 16:47:57 -0700 | [diff] [blame] | 637 | saw_cpu_error = 0; |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 638 | retries = 0; |
David S. Miller | 3cab0c3 | 2006-03-02 21:50:47 -0800 | [diff] [blame] | 639 | prev_sent = 0; |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 640 | do { |
David S. Miller | 3cab0c3 | 2006-03-02 21:50:47 -0800 | [diff] [blame] | 641 | int forward_progress, n_sent; |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 642 | |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 643 | status = sun4v_cpu_mondo_send(cnt, |
| 644 | tb->cpu_list_pa, |
| 645 | tb->cpu_mondo_block_pa); |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 646 | |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 647 | /* HV_EOK means all cpus received the xcall, we're done. */ |
| 648 | if (likely(status == HV_EOK)) |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 649 | break; |
| 650 | |
David S. Miller | 3cab0c3 | 2006-03-02 21:50:47 -0800 | [diff] [blame] | 651 | /* First, see if we made any forward progress. |
| 652 | * |
| 653 | * The hypervisor indicates successful sends by setting |
| 654 | * cpu list entries to the value 0xffff. |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 655 | */ |
David S. Miller | 3cab0c3 | 2006-03-02 21:50:47 -0800 | [diff] [blame] | 656 | n_sent = 0; |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 657 | for (i = 0; i < cnt; i++) { |
David S. Miller | 3cab0c3 | 2006-03-02 21:50:47 -0800 | [diff] [blame] | 658 | if (likely(cpu_list[i] == 0xffff)) |
| 659 | n_sent++; |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 660 | } |
| 661 | |
David S. Miller | 3cab0c3 | 2006-03-02 21:50:47 -0800 | [diff] [blame] | 662 | forward_progress = 0; |
| 663 | if (n_sent > prev_sent) |
| 664 | forward_progress = 1; |
| 665 | |
| 666 | prev_sent = n_sent; |
| 667 | |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 668 | /* If we get a HV_ECPUERROR, then one or more of the cpus |
| 669 | * in the list are in error state. Use the cpu_state() |
| 670 | * hypervisor call to find out which cpus are in error state. |
| 671 | */ |
| 672 | if (unlikely(status == HV_ECPUERROR)) { |
| 673 | for (i = 0; i < cnt; i++) { |
| 674 | long err; |
| 675 | u16 cpu; |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 676 | |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 677 | cpu = cpu_list[i]; |
| 678 | if (cpu == 0xffff) |
| 679 | continue; |
| 680 | |
| 681 | err = sun4v_cpu_state(cpu); |
David S. Miller | ed4d9c6 | 2008-08-04 16:47:57 -0700 | [diff] [blame] | 682 | if (err == HV_CPU_STATE_ERROR) { |
| 683 | saw_cpu_error = (cpu + 1); |
David S. Miller | 3cab0c3 | 2006-03-02 21:50:47 -0800 | [diff] [blame] | 684 | cpu_list[i] = 0xffff; |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 685 | } |
| 686 | } |
| 687 | } else if (unlikely(status != HV_EWOULDBLOCK)) |
| 688 | goto fatal_mondo_error; |
| 689 | |
David S. Miller | 3cab0c3 | 2006-03-02 21:50:47 -0800 | [diff] [blame] | 690 | /* Don't bother rewriting the CPU list, just leave the |
| 691 | * 0xffff and non-0xffff entries in there and the |
| 692 | * hypervisor will do the right thing. |
| 693 | * |
| 694 | * Only advance timeout state if we didn't make any |
| 695 | * forward progress. |
| 696 | */ |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 697 | if (unlikely(!forward_progress)) { |
| 698 | if (unlikely(++retries > 10000)) |
| 699 | goto fatal_mondo_timeout; |
| 700 | |
| 701 | /* Delay a little bit to let other cpus catch up |
| 702 | * on their cpu mondo queue work. |
| 703 | */ |
| 704 | udelay(2 * cnt); |
| 705 | } |
David S. Miller | 1d2f1f9 | 2006-02-08 16:41:20 -0800 | [diff] [blame] | 706 | } while (1); |
| 707 | |
David S. Miller | ed4d9c6 | 2008-08-04 16:47:57 -0700 | [diff] [blame] | 708 | if (unlikely(saw_cpu_error)) |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 709 | goto fatal_mondo_cpu_error; |
| 710 | |
| 711 | return; |
| 712 | |
| 713 | fatal_mondo_cpu_error: |
| 714 | printk(KERN_CRIT "CPU[%d]: SUN4V mondo cpu error, some target cpus " |
David S. Miller | ed4d9c6 | 2008-08-04 16:47:57 -0700 | [diff] [blame] | 715 | "(including %d) were in error state\n", |
| 716 | this_cpu, saw_cpu_error - 1); |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 717 | return; |
| 718 | |
| 719 | fatal_mondo_timeout: |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 720 | printk(KERN_CRIT "CPU[%d]: SUN4V mondo timeout, no forward " |
| 721 | " progress after %d retries.\n", |
| 722 | this_cpu, retries); |
| 723 | goto dump_cpu_list_and_out; |
| 724 | |
| 725 | fatal_mondo_error: |
David S. Miller | b830ab6 | 2006-02-28 15:10:26 -0800 | [diff] [blame] | 726 | printk(KERN_CRIT "CPU[%d]: Unexpected SUN4V mondo error %lu\n", |
| 727 | this_cpu, status); |
| 728 | printk(KERN_CRIT "CPU[%d]: Args were cnt(%d) cpulist_pa(%lx) " |
| 729 | "mondo_block_pa(%lx)\n", |
| 730 | this_cpu, cnt, tb->cpu_list_pa, tb->cpu_mondo_block_pa); |
| 731 | |
| 732 | dump_cpu_list_and_out: |
| 733 | printk(KERN_CRIT "CPU[%d]: CPU list [ ", this_cpu); |
| 734 | for (i = 0; i < cnt; i++) |
| 735 | printk("%u ", cpu_list[i]); |
| 736 | printk("]\n"); |
David S. Miller | a43fe0e | 2006-02-04 03:10:53 -0800 | [diff] [blame] | 737 | } |
| 738 | |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 739 | static void (*xcall_deliver_impl)(struct trap_per_cpu *, int); |
David S. Miller | deb1699 | 2008-08-04 16:16:20 -0700 | [diff] [blame] | 740 | |
| 741 | static void xcall_deliver(u64 data0, u64 data1, u64 data2, const cpumask_t *mask) |
| 742 | { |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 743 | struct trap_per_cpu *tb; |
| 744 | int this_cpu, i, cnt; |
David S. Miller | c02a511 | 2008-08-04 16:18:40 -0700 | [diff] [blame] | 745 | unsigned long flags; |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 746 | u16 *cpu_list; |
| 747 | u64 *mondo; |
David S. Miller | c02a511 | 2008-08-04 16:18:40 -0700 | [diff] [blame] | 748 | |
| 749 | /* We have to do this whole thing with interrupts fully disabled. |
| 750 | * Otherwise if we send an xcall from interrupt context it will |
| 751 | * corrupt both our mondo block and cpu list state. |
| 752 | * |
| 753 | * One consequence of this is that we cannot use timeout mechanisms |
| 754 | * that depend upon interrupts being delivered locally. So, for |
| 755 | * example, we cannot sample jiffies and expect it to advance. |
| 756 | * |
| 757 | * Fortunately, udelay() uses %stick/%tick so we can use that. |
| 758 | */ |
| 759 | local_irq_save(flags); |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 760 | |
| 761 | this_cpu = smp_processor_id(); |
| 762 | tb = &trap_block[this_cpu]; |
| 763 | |
| 764 | mondo = __va(tb->cpu_mondo_block_pa); |
| 765 | mondo[0] = data0; |
| 766 | mondo[1] = data1; |
| 767 | mondo[2] = data2; |
| 768 | wmb(); |
| 769 | |
| 770 | cpu_list = __va(tb->cpu_list_pa); |
| 771 | |
| 772 | /* Setup the initial cpu list. */ |
| 773 | cnt = 0; |
Rusty Russell | 8e75728 | 2008-12-08 01:10:08 -0800 | [diff] [blame] | 774 | for_each_cpu(i, mask) { |
David S. Miller | 90f7ae8 | 2008-08-04 16:42:58 -0700 | [diff] [blame] | 775 | if (i == this_cpu || !cpu_online(i)) |
| 776 | continue; |
| 777 | cpu_list[cnt++] = i; |
| 778 | } |
| 779 | |
| 780 | if (cnt) |
| 781 | xcall_deliver_impl(tb, cnt); |
| 782 | |
David S. Miller | c02a511 | 2008-08-04 16:18:40 -0700 | [diff] [blame] | 783 | local_irq_restore(flags); |
David S. Miller | deb1699 | 2008-08-04 16:16:20 -0700 | [diff] [blame] | 784 | } |
David S. Miller | 5e0797e | 2008-08-03 22:52:41 -0700 | [diff] [blame] | 785 | |
David S. Miller | 91a4231 | 2008-08-04 00:51:18 -0700 | [diff] [blame] | 786 | /* Send cross call to all processors mentioned in MASK_P |
| 787 | * except self. Really, there are only two cases currently, |
| 788 | * "&cpu_online_map" and "&mm->cpu_vm_mask". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | */ |
David S. Miller | ae58388 | 2008-08-04 16:56:15 -0700 | [diff] [blame] | 790 | static void smp_cross_call_masked(unsigned long *func, u32 ctx, u64 data1, u64 data2, const cpumask_t *mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | { |
| 792 | u64 data0 = (((u64)ctx)<<32 | (((u64)func) & 0xffffffff)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | |
David S. Miller | ae58388 | 2008-08-04 16:56:15 -0700 | [diff] [blame] | 794 | xcall_deliver(data0, data1, data2, mask); |
| 795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
David S. Miller | ae58388 | 2008-08-04 16:56:15 -0700 | [diff] [blame] | 797 | /* Send cross call to all processors except self. */ |
| 798 | static void smp_cross_call(unsigned long *func, u32 ctx, u64 data1, u64 data2) |
| 799 | { |
| 800 | smp_cross_call_masked(func, ctx, data1, data2, &cpu_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | } |
| 802 | |
| 803 | extern unsigned long xcall_sync_tick; |
| 804 | |
| 805 | static void smp_start_sync_tick_client(int cpu) |
| 806 | { |
David S. Miller | 24445a4 | 2008-08-04 00:02:31 -0700 | [diff] [blame] | 807 | xcall_deliver((u64) &xcall_sync_tick, 0, 0, |
| 808 | &cpumask_of_cpu(cpu)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | } |
| 810 | |
David S. Miller | d172ad1 | 2008-07-17 23:44:50 -0700 | [diff] [blame] | 811 | extern unsigned long xcall_call_function; |
| 812 | |
Rusty Russell | f46df02 | 2009-03-16 14:40:22 +1030 | [diff] [blame] | 813 | void arch_send_call_function_ipi_mask(const struct cpumask *mask) |
David S. Miller | d172ad1 | 2008-07-17 23:44:50 -0700 | [diff] [blame] | 814 | { |
Rusty Russell | f46df02 | 2009-03-16 14:40:22 +1030 | [diff] [blame] | 815 | xcall_deliver((u64) &xcall_call_function, 0, 0, mask); |
David S. Miller | d172ad1 | 2008-07-17 23:44:50 -0700 | [diff] [blame] | 816 | } |
| 817 | |
| 818 | extern unsigned long xcall_call_function_single; |
| 819 | |
| 820 | void arch_send_call_function_single_ipi(int cpu) |
| 821 | { |
David S. Miller | 1992663 | 2008-08-03 23:56:28 -0700 | [diff] [blame] | 822 | xcall_deliver((u64) &xcall_call_function_single, 0, 0, |
| 823 | &cpumask_of_cpu(cpu)); |
David S. Miller | d172ad1 | 2008-07-17 23:44:50 -0700 | [diff] [blame] | 824 | } |
| 825 | |
David S. Miller | 9960e9e | 2010-04-07 04:41:33 -0700 | [diff] [blame] | 826 | void __irq_entry smp_call_function_client(int irq, struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | clear_softint(1 << irq); |
David S. Miller | d172ad1 | 2008-07-17 23:44:50 -0700 | [diff] [blame] | 829 | generic_smp_call_function_interrupt(); |
| 830 | } |
| 831 | |
David S. Miller | 9960e9e | 2010-04-07 04:41:33 -0700 | [diff] [blame] | 832 | void __irq_entry smp_call_function_single_client(int irq, struct pt_regs *regs) |
David S. Miller | d172ad1 | 2008-07-17 23:44:50 -0700 | [diff] [blame] | 833 | { |
| 834 | clear_softint(1 << irq); |
| 835 | generic_smp_call_function_single_interrupt(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | } |
| 837 | |
David S. Miller | bd40791 | 2006-01-31 18:31:38 -0800 | [diff] [blame] | 838 | static void tsb_sync(void *info) |
| 839 | { |
David S. Miller | 6f25f39 | 2006-03-28 13:29:26 -0800 | [diff] [blame] | 840 | struct trap_per_cpu *tp = &trap_block[raw_smp_processor_id()]; |
David S. Miller | bd40791 | 2006-01-31 18:31:38 -0800 | [diff] [blame] | 841 | struct mm_struct *mm = info; |
| 842 | |
David S. Miller | 6f25f39 | 2006-03-28 13:29:26 -0800 | [diff] [blame] | 843 | /* It is not valid to test "currrent->active_mm == mm" here. |
| 844 | * |
| 845 | * The value of "current" is not changed atomically with |
| 846 | * switch_mm(). But that's OK, we just need to check the |
| 847 | * current cpu's trap block PGD physical address. |
| 848 | */ |
| 849 | if (tp->pgd_paddr == __pa(mm->pgd)) |
David S. Miller | bd40791 | 2006-01-31 18:31:38 -0800 | [diff] [blame] | 850 | tsb_context_switch(mm); |
| 851 | } |
| 852 | |
| 853 | void smp_tsb_sync(struct mm_struct *mm) |
| 854 | { |
Rusty Russell | 81f1adf | 2009-03-16 14:40:39 +1030 | [diff] [blame] | 855 | smp_call_function_many(mm_cpumask(mm), tsb_sync, mm, 1); |
David S. Miller | bd40791 | 2006-01-31 18:31:38 -0800 | [diff] [blame] | 856 | } |
| 857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | extern unsigned long xcall_flush_tlb_mm; |
| 859 | extern unsigned long xcall_flush_tlb_pending; |
| 860 | extern unsigned long xcall_flush_tlb_kernel_range; |
David S. Miller | 93dae5b | 2008-05-19 23:46:00 -0700 | [diff] [blame] | 861 | extern unsigned long xcall_fetch_glob_regs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | extern unsigned long xcall_receive_signal; |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 863 | extern unsigned long xcall_new_mmu_context_version; |
David S. Miller | e2fdd7f | 2008-04-29 02:38:50 -0700 | [diff] [blame] | 864 | #ifdef CONFIG_KGDB |
| 865 | extern unsigned long xcall_kgdb_capture; |
| 866 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
| 868 | #ifdef DCACHE_ALIASING_POSSIBLE |
| 869 | extern unsigned long xcall_flush_dcache_page_cheetah; |
| 870 | #endif |
| 871 | extern unsigned long xcall_flush_dcache_page_spitfire; |
| 872 | |
| 873 | #ifdef CONFIG_DEBUG_DCFLUSH |
| 874 | extern atomic_t dcpage_flushes; |
| 875 | extern atomic_t dcpage_flushes_xcall; |
| 876 | #endif |
| 877 | |
David S. Miller | d979f17 | 2007-10-27 00:13:04 -0700 | [diff] [blame] | 878 | static inline void __local_flush_dcache_page(struct page *page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | { |
| 880 | #ifdef DCACHE_ALIASING_POSSIBLE |
| 881 | __flush_dcache_page(page_address(page), |
| 882 | ((tlb_type == spitfire) && |
| 883 | page_mapping(page) != NULL)); |
| 884 | #else |
| 885 | if (page_mapping(page) != NULL && |
| 886 | tlb_type == spitfire) |
| 887 | __flush_icache_page(__pa(page_address(page))); |
| 888 | #endif |
| 889 | } |
| 890 | |
| 891 | void smp_flush_dcache_page_impl(struct page *page, int cpu) |
| 892 | { |
David S. Miller | a43fe0e | 2006-02-04 03:10:53 -0800 | [diff] [blame] | 893 | int this_cpu; |
| 894 | |
| 895 | if (tlb_type == hypervisor) |
| 896 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
| 898 | #ifdef CONFIG_DEBUG_DCFLUSH |
| 899 | atomic_inc(&dcpage_flushes); |
| 900 | #endif |
David S. Miller | a43fe0e | 2006-02-04 03:10:53 -0800 | [diff] [blame] | 901 | |
| 902 | this_cpu = get_cpu(); |
| 903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | if (cpu == this_cpu) { |
| 905 | __local_flush_dcache_page(page); |
| 906 | } else if (cpu_online(cpu)) { |
| 907 | void *pg_addr = page_address(page); |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 908 | u64 data0 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | |
| 910 | if (tlb_type == spitfire) { |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 911 | data0 = ((u64)&xcall_flush_dcache_page_spitfire); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | if (page_mapping(page) != NULL) |
| 913 | data0 |= ((u64)1 << 32); |
David S. Miller | a43fe0e | 2006-02-04 03:10:53 -0800 | [diff] [blame] | 914 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | #ifdef DCACHE_ALIASING_POSSIBLE |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 916 | data0 = ((u64)&xcall_flush_dcache_page_cheetah); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | #endif |
| 918 | } |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 919 | if (data0) { |
| 920 | xcall_deliver(data0, __pa(pg_addr), |
David S. Miller | ae58388 | 2008-08-04 16:56:15 -0700 | [diff] [blame] | 921 | (u64) pg_addr, &cpumask_of_cpu(cpu)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | #ifdef CONFIG_DEBUG_DCFLUSH |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 923 | atomic_inc(&dcpage_flushes_xcall); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | #endif |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 925 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | } |
| 927 | |
| 928 | put_cpu(); |
| 929 | } |
| 930 | |
| 931 | void flush_dcache_page_all(struct mm_struct *mm, struct page *page) |
| 932 | { |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 933 | void *pg_addr; |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 934 | u64 data0; |
David S. Miller | a43fe0e | 2006-02-04 03:10:53 -0800 | [diff] [blame] | 935 | |
| 936 | if (tlb_type == hypervisor) |
| 937 | return; |
| 938 | |
David S. Miller | c6fee08 | 2011-02-26 23:40:02 -0800 | [diff] [blame] | 939 | preempt_disable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | #ifdef CONFIG_DEBUG_DCFLUSH |
| 942 | atomic_inc(&dcpage_flushes); |
| 943 | #endif |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 944 | data0 = 0; |
| 945 | pg_addr = page_address(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | if (tlb_type == spitfire) { |
| 947 | data0 = ((u64)&xcall_flush_dcache_page_spitfire); |
| 948 | if (page_mapping(page) != NULL) |
| 949 | data0 |= ((u64)1 << 32); |
David S. Miller | a43fe0e | 2006-02-04 03:10:53 -0800 | [diff] [blame] | 950 | } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | #ifdef DCACHE_ALIASING_POSSIBLE |
| 952 | data0 = ((u64)&xcall_flush_dcache_page_cheetah); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | #endif |
| 954 | } |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 955 | if (data0) { |
| 956 | xcall_deliver(data0, __pa(pg_addr), |
David S. Miller | ae58388 | 2008-08-04 16:56:15 -0700 | [diff] [blame] | 957 | (u64) pg_addr, &cpu_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | #ifdef CONFIG_DEBUG_DCFLUSH |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 959 | atomic_inc(&dcpage_flushes_xcall); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | #endif |
David S. Miller | 622824d | 2008-08-03 23:07:18 -0700 | [diff] [blame] | 961 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | __local_flush_dcache_page(page); |
| 963 | |
David S. Miller | c6fee08 | 2011-02-26 23:40:02 -0800 | [diff] [blame] | 964 | preempt_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | } |
| 966 | |
David S. Miller | 9960e9e | 2010-04-07 04:41:33 -0700 | [diff] [blame] | 967 | void __irq_entry smp_new_mmu_context_version_client(int irq, struct pt_regs *regs) |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 968 | { |
David S. Miller | a0663a7 | 2006-02-23 14:19:28 -0800 | [diff] [blame] | 969 | struct mm_struct *mm; |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 970 | unsigned long flags; |
David S. Miller | a0663a7 | 2006-02-23 14:19:28 -0800 | [diff] [blame] | 971 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | clear_softint(1 << irq); |
David S. Miller | a0663a7 | 2006-02-23 14:19:28 -0800 | [diff] [blame] | 973 | |
| 974 | /* See if we need to allocate a new TLB context because |
| 975 | * the version of the one we are using is now out of date. |
| 976 | */ |
| 977 | mm = current->active_mm; |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 978 | if (unlikely(!mm || (mm == &init_mm))) |
| 979 | return; |
David S. Miller | a0663a7 | 2006-02-23 14:19:28 -0800 | [diff] [blame] | 980 | |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 981 | spin_lock_irqsave(&mm->context.lock, flags); |
David S. Miller | aac0aad | 2006-02-27 17:56:51 -0800 | [diff] [blame] | 982 | |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 983 | if (unlikely(!CTX_VALID(mm->context))) |
| 984 | get_new_mmu_context(mm); |
David S. Miller | aac0aad | 2006-02-27 17:56:51 -0800 | [diff] [blame] | 985 | |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 986 | spin_unlock_irqrestore(&mm->context.lock, flags); |
David S. Miller | aac0aad | 2006-02-27 17:56:51 -0800 | [diff] [blame] | 987 | |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 988 | load_secondary_context(mm); |
| 989 | __flush_tlb_mm(CTX_HWBITS(mm->context), |
| 990 | SECONDARY_CONTEXT); |
David S. Miller | a0663a7 | 2006-02-23 14:19:28 -0800 | [diff] [blame] | 991 | } |
| 992 | |
| 993 | void smp_new_mmu_context_version(void) |
| 994 | { |
David S. Miller | ee29074 | 2006-03-06 22:50:44 -0800 | [diff] [blame] | 995 | smp_cross_call(&xcall_new_mmu_context_version, 0, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | } |
| 997 | |
David S. Miller | e2fdd7f | 2008-04-29 02:38:50 -0700 | [diff] [blame] | 998 | #ifdef CONFIG_KGDB |
| 999 | void kgdb_roundup_cpus(unsigned long flags) |
| 1000 | { |
| 1001 | smp_cross_call(&xcall_kgdb_capture, 0, 0, 0); |
| 1002 | } |
| 1003 | #endif |
| 1004 | |
David S. Miller | 93dae5b | 2008-05-19 23:46:00 -0700 | [diff] [blame] | 1005 | void smp_fetch_global_regs(void) |
| 1006 | { |
| 1007 | smp_cross_call(&xcall_fetch_glob_regs, 0, 0, 0); |
| 1008 | } |
David S. Miller | 93dae5b | 2008-05-19 23:46:00 -0700 | [diff] [blame] | 1009 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | /* We know that the window frames of the user have been flushed |
| 1011 | * to the stack before we get here because all callers of us |
| 1012 | * are flush_tlb_*() routines, and these run after flush_cache_*() |
| 1013 | * which performs the flushw. |
| 1014 | * |
| 1015 | * The SMP TLB coherency scheme we use works as follows: |
| 1016 | * |
| 1017 | * 1) mm->cpu_vm_mask is a bit mask of which cpus an address |
| 1018 | * space has (potentially) executed on, this is the heuristic |
| 1019 | * we use to avoid doing cross calls. |
| 1020 | * |
| 1021 | * Also, for flushing from kswapd and also for clones, we |
| 1022 | * use cpu_vm_mask as the list of cpus to make run the TLB. |
| 1023 | * |
| 1024 | * 2) TLB context numbers are shared globally across all processors |
| 1025 | * in the system, this allows us to play several games to avoid |
| 1026 | * cross calls. |
| 1027 | * |
| 1028 | * One invariant is that when a cpu switches to a process, and |
| 1029 | * that processes tsk->active_mm->cpu_vm_mask does not have the |
| 1030 | * current cpu's bit set, that tlb context is flushed locally. |
| 1031 | * |
| 1032 | * If the address space is non-shared (ie. mm->count == 1) we avoid |
| 1033 | * cross calls when we want to flush the currently running process's |
| 1034 | * tlb state. This is done by clearing all cpu bits except the current |
David S. Miller | f9384d4 | 2009-03-27 01:09:17 -0700 | [diff] [blame] | 1035 | * processor's in current->mm->cpu_vm_mask and performing the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | * flush locally only. This will force any subsequent cpus which run |
| 1037 | * this task to flush the context from the local tlb if the process |
| 1038 | * migrates to another cpu (again). |
| 1039 | * |
| 1040 | * 3) For shared address spaces (threads) and swapping we bite the |
| 1041 | * bullet for most cases and perform the cross call (but only to |
| 1042 | * the cpus listed in cpu_vm_mask). |
| 1043 | * |
| 1044 | * The performance gain from "optimizing" away the cross call for threads is |
| 1045 | * questionable (in theory the big win for threads is the massive sharing of |
| 1046 | * address space state across processors). |
| 1047 | */ |
David S. Miller | 62dbec7 | 2005-11-07 14:09:58 -0800 | [diff] [blame] | 1048 | |
| 1049 | /* This currently is only used by the hugetlb arch pre-fault |
| 1050 | * hook on UltraSPARC-III+ and later when changing the pagesize |
| 1051 | * bits of the context register for an address space. |
| 1052 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | void smp_flush_tlb_mm(struct mm_struct *mm) |
| 1054 | { |
David S. Miller | 62dbec7 | 2005-11-07 14:09:58 -0800 | [diff] [blame] | 1055 | u32 ctx = CTX_HWBITS(mm->context); |
| 1056 | int cpu = get_cpu(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | |
David S. Miller | 62dbec7 | 2005-11-07 14:09:58 -0800 | [diff] [blame] | 1058 | if (atomic_read(&mm->mm_users) == 1) { |
Rusty Russell | 81f1adf | 2009-03-16 14:40:39 +1030 | [diff] [blame] | 1059 | cpumask_copy(mm_cpumask(mm), cpumask_of(cpu)); |
David S. Miller | 62dbec7 | 2005-11-07 14:09:58 -0800 | [diff] [blame] | 1060 | goto local_flush_and_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | } |
David S. Miller | 62dbec7 | 2005-11-07 14:09:58 -0800 | [diff] [blame] | 1062 | |
| 1063 | smp_cross_call_masked(&xcall_flush_tlb_mm, |
| 1064 | ctx, 0, 0, |
Rusty Russell | 81f1adf | 2009-03-16 14:40:39 +1030 | [diff] [blame] | 1065 | mm_cpumask(mm)); |
David S. Miller | 62dbec7 | 2005-11-07 14:09:58 -0800 | [diff] [blame] | 1066 | |
| 1067 | local_flush_and_out: |
| 1068 | __flush_tlb_mm(ctx, SECONDARY_CONTEXT); |
| 1069 | |
| 1070 | put_cpu(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } |
| 1072 | |
| 1073 | void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long *vaddrs) |
| 1074 | { |
| 1075 | u32 ctx = CTX_HWBITS(mm->context); |
| 1076 | int cpu = get_cpu(); |
| 1077 | |
David S. Miller | f9384d4 | 2009-03-27 01:09:17 -0700 | [diff] [blame] | 1078 | if (mm == current->mm && atomic_read(&mm->mm_users) == 1) |
Rusty Russell | 81f1adf | 2009-03-16 14:40:39 +1030 | [diff] [blame] | 1079 | cpumask_copy(mm_cpumask(mm), cpumask_of(cpu)); |
Hugh Dickins | dedeb00 | 2005-11-07 14:09:01 -0800 | [diff] [blame] | 1080 | else |
| 1081 | smp_cross_call_masked(&xcall_flush_tlb_pending, |
| 1082 | ctx, nr, (unsigned long) vaddrs, |
Rusty Russell | 81f1adf | 2009-03-16 14:40:39 +1030 | [diff] [blame] | 1083 | mm_cpumask(mm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | __flush_tlb_pending(ctx, nr, vaddrs); |
| 1086 | |
| 1087 | put_cpu(); |
| 1088 | } |
| 1089 | |
| 1090 | void smp_flush_tlb_kernel_range(unsigned long start, unsigned long end) |
| 1091 | { |
| 1092 | start &= PAGE_MASK; |
| 1093 | end = PAGE_ALIGN(end); |
| 1094 | if (start != end) { |
| 1095 | smp_cross_call(&xcall_flush_tlb_kernel_range, |
| 1096 | 0, start, end); |
| 1097 | |
| 1098 | __flush_tlb_kernel_range(start, end); |
| 1099 | } |
| 1100 | } |
| 1101 | |
| 1102 | /* CPU capture. */ |
| 1103 | /* #define CAPTURE_DEBUG */ |
| 1104 | extern unsigned long xcall_capture; |
| 1105 | |
| 1106 | static atomic_t smp_capture_depth = ATOMIC_INIT(0); |
| 1107 | static atomic_t smp_capture_registry = ATOMIC_INIT(0); |
| 1108 | static unsigned long penguins_are_doing_time; |
| 1109 | |
| 1110 | void smp_capture(void) |
| 1111 | { |
| 1112 | int result = atomic_add_ret(1, &smp_capture_depth); |
| 1113 | |
| 1114 | if (result == 1) { |
| 1115 | int ncpus = num_online_cpus(); |
| 1116 | |
| 1117 | #ifdef CAPTURE_DEBUG |
| 1118 | printk("CPU[%d]: Sending penguins to jail...", |
| 1119 | smp_processor_id()); |
| 1120 | #endif |
| 1121 | penguins_are_doing_time = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | atomic_inc(&smp_capture_registry); |
| 1123 | smp_cross_call(&xcall_capture, 0, 0, 0); |
| 1124 | while (atomic_read(&smp_capture_registry) != ncpus) |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 1125 | rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | #ifdef CAPTURE_DEBUG |
| 1127 | printk("done\n"); |
| 1128 | #endif |
| 1129 | } |
| 1130 | } |
| 1131 | |
| 1132 | void smp_release(void) |
| 1133 | { |
| 1134 | if (atomic_dec_and_test(&smp_capture_depth)) { |
| 1135 | #ifdef CAPTURE_DEBUG |
| 1136 | printk("CPU[%d]: Giving pardon to " |
| 1137 | "imprisoned penguins\n", |
| 1138 | smp_processor_id()); |
| 1139 | #endif |
| 1140 | penguins_are_doing_time = 0; |
David S. Miller | 293666b | 2008-11-15 13:33:25 -0800 | [diff] [blame] | 1141 | membar_safe("#StoreLoad"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | atomic_dec(&smp_capture_registry); |
| 1143 | } |
| 1144 | } |
| 1145 | |
David S. Miller | b4f4372 | 2008-11-23 21:55:29 -0800 | [diff] [blame] | 1146 | /* Imprisoned penguins run with %pil == PIL_NORMAL_MAX, but PSTATE_IE |
| 1147 | * set, so they can service tlb flush xcalls... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | */ |
| 1149 | extern void prom_world(int); |
David S. Miller | 96c6e0d | 2006-01-31 18:32:29 -0800 | [diff] [blame] | 1150 | |
David S. Miller | 9960e9e | 2010-04-07 04:41:33 -0700 | [diff] [blame] | 1151 | void __irq_entry smp_penguin_jailcell(int irq, struct pt_regs *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | clear_softint(1 << irq); |
| 1154 | |
| 1155 | preempt_disable(); |
| 1156 | |
| 1157 | __asm__ __volatile__("flushw"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | prom_world(1); |
| 1159 | atomic_inc(&smp_capture_registry); |
David S. Miller | 293666b | 2008-11-15 13:33:25 -0800 | [diff] [blame] | 1160 | membar_safe("#StoreLoad"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | while (penguins_are_doing_time) |
David S. Miller | 4f07118 | 2005-08-29 12:46:22 -0700 | [diff] [blame] | 1162 | rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | atomic_dec(&smp_capture_registry); |
| 1164 | prom_world(0); |
| 1165 | |
| 1166 | preempt_enable(); |
| 1167 | } |
| 1168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | /* /proc/profile writes can call this, don't __init it please. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | int setup_profiling_timer(unsigned int multiplier) |
| 1171 | { |
David S. Miller | 777a447 | 2007-02-22 06:24:10 -0800 | [diff] [blame] | 1172 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | } |
| 1174 | |
| 1175 | void __init smp_prepare_cpus(unsigned int max_cpus) |
| 1176 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | } |
| 1178 | |
| 1179 | void __devinit smp_prepare_boot_cpu(void) |
| 1180 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | } |
| 1182 | |
David S. Miller | 5e0797e | 2008-08-03 22:52:41 -0700 | [diff] [blame] | 1183 | void __init smp_setup_processor_id(void) |
| 1184 | { |
| 1185 | if (tlb_type == spitfire) |
David S. Miller | deb1699 | 2008-08-04 16:16:20 -0700 | [diff] [blame] | 1186 | xcall_deliver_impl = spitfire_xcall_deliver; |
David S. Miller | 5e0797e | 2008-08-03 22:52:41 -0700 | [diff] [blame] | 1187 | else if (tlb_type == cheetah || tlb_type == cheetah_plus) |
David S. Miller | deb1699 | 2008-08-04 16:16:20 -0700 | [diff] [blame] | 1188 | xcall_deliver_impl = cheetah_xcall_deliver; |
David S. Miller | 5e0797e | 2008-08-03 22:52:41 -0700 | [diff] [blame] | 1189 | else |
David S. Miller | deb1699 | 2008-08-04 16:16:20 -0700 | [diff] [blame] | 1190 | xcall_deliver_impl = hypervisor_xcall_deliver; |
David S. Miller | 5e0797e | 2008-08-03 22:52:41 -0700 | [diff] [blame] | 1191 | } |
| 1192 | |
David S. Miller | 5cbc307 | 2007-05-25 15:49:59 -0700 | [diff] [blame] | 1193 | void __devinit smp_fill_in_sib_core_maps(void) |
| 1194 | { |
| 1195 | unsigned int i; |
| 1196 | |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1197 | for_each_present_cpu(i) { |
David S. Miller | 5cbc307 | 2007-05-25 15:49:59 -0700 | [diff] [blame] | 1198 | unsigned int j; |
| 1199 | |
David S. Miller | 39dd992 | 2007-07-15 01:29:24 -0700 | [diff] [blame] | 1200 | cpus_clear(cpu_core_map[i]); |
David S. Miller | 5cbc307 | 2007-05-25 15:49:59 -0700 | [diff] [blame] | 1201 | if (cpu_data(i).core_id == 0) { |
David S. Miller | f78eae2 | 2007-06-04 17:01:39 -0700 | [diff] [blame] | 1202 | cpu_set(i, cpu_core_map[i]); |
David S. Miller | 5cbc307 | 2007-05-25 15:49:59 -0700 | [diff] [blame] | 1203 | continue; |
| 1204 | } |
| 1205 | |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1206 | for_each_present_cpu(j) { |
David S. Miller | 5cbc307 | 2007-05-25 15:49:59 -0700 | [diff] [blame] | 1207 | if (cpu_data(i).core_id == |
| 1208 | cpu_data(j).core_id) |
David S. Miller | f78eae2 | 2007-06-04 17:01:39 -0700 | [diff] [blame] | 1209 | cpu_set(j, cpu_core_map[i]); |
| 1210 | } |
| 1211 | } |
| 1212 | |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1213 | for_each_present_cpu(i) { |
David S. Miller | f78eae2 | 2007-06-04 17:01:39 -0700 | [diff] [blame] | 1214 | unsigned int j; |
| 1215 | |
Mike Travis | d5a7430 | 2007-10-16 01:24:05 -0700 | [diff] [blame] | 1216 | cpus_clear(per_cpu(cpu_sibling_map, i)); |
David S. Miller | f78eae2 | 2007-06-04 17:01:39 -0700 | [diff] [blame] | 1217 | if (cpu_data(i).proc_id == -1) { |
Mike Travis | d5a7430 | 2007-10-16 01:24:05 -0700 | [diff] [blame] | 1218 | cpu_set(i, per_cpu(cpu_sibling_map, i)); |
David S. Miller | f78eae2 | 2007-06-04 17:01:39 -0700 | [diff] [blame] | 1219 | continue; |
| 1220 | } |
| 1221 | |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1222 | for_each_present_cpu(j) { |
David S. Miller | f78eae2 | 2007-06-04 17:01:39 -0700 | [diff] [blame] | 1223 | if (cpu_data(i).proc_id == |
| 1224 | cpu_data(j).proc_id) |
Mike Travis | d5a7430 | 2007-10-16 01:24:05 -0700 | [diff] [blame] | 1225 | cpu_set(j, per_cpu(cpu_sibling_map, i)); |
David S. Miller | 5cbc307 | 2007-05-25 15:49:59 -0700 | [diff] [blame] | 1226 | } |
| 1227 | } |
| 1228 | } |
| 1229 | |
Gautham R Shenoy | b282b6f | 2007-01-10 23:15:34 -0800 | [diff] [blame] | 1230 | int __cpuinit __cpu_up(unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | { |
| 1232 | int ret = smp_boot_one_cpu(cpu); |
| 1233 | |
| 1234 | if (!ret) { |
| 1235 | cpu_set(cpu, smp_commenced_mask); |
| 1236 | while (!cpu_isset(cpu, cpu_online_map)) |
| 1237 | mb(); |
| 1238 | if (!cpu_isset(cpu, cpu_online_map)) { |
| 1239 | ret = -ENODEV; |
| 1240 | } else { |
David S. Miller | 02fead7 | 2006-02-11 23:22:47 -0800 | [diff] [blame] | 1241 | /* On SUN4V, writes to %tick and %stick are |
| 1242 | * not allowed. |
| 1243 | */ |
| 1244 | if (tlb_type != hypervisor) |
| 1245 | smp_synchronize_one_tick(cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | } |
| 1247 | } |
| 1248 | return ret; |
| 1249 | } |
| 1250 | |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 1251 | #ifdef CONFIG_HOTPLUG_CPU |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1252 | void cpu_play_dead(void) |
| 1253 | { |
| 1254 | int cpu = smp_processor_id(); |
| 1255 | unsigned long pstate; |
| 1256 | |
| 1257 | idle_task_exit(); |
| 1258 | |
| 1259 | if (tlb_type == hypervisor) { |
| 1260 | struct trap_per_cpu *tb = &trap_block[cpu]; |
| 1261 | |
| 1262 | sun4v_cpu_qconf(HV_CPU_QUEUE_CPU_MONDO, |
| 1263 | tb->cpu_mondo_pa, 0); |
| 1264 | sun4v_cpu_qconf(HV_CPU_QUEUE_DEVICE_MONDO, |
| 1265 | tb->dev_mondo_pa, 0); |
| 1266 | sun4v_cpu_qconf(HV_CPU_QUEUE_RES_ERROR, |
| 1267 | tb->resum_mondo_pa, 0); |
| 1268 | sun4v_cpu_qconf(HV_CPU_QUEUE_NONRES_ERROR, |
| 1269 | tb->nonresum_mondo_pa, 0); |
| 1270 | } |
| 1271 | |
| 1272 | cpu_clear(cpu, smp_commenced_mask); |
| 1273 | membar_safe("#Sync"); |
| 1274 | |
| 1275 | local_irq_disable(); |
| 1276 | |
| 1277 | __asm__ __volatile__( |
| 1278 | "rdpr %%pstate, %0\n\t" |
| 1279 | "wrpr %0, %1, %%pstate" |
| 1280 | : "=r" (pstate) |
| 1281 | : "i" (PSTATE_IE)); |
| 1282 | |
| 1283 | while (1) |
| 1284 | barrier(); |
| 1285 | } |
| 1286 | |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 1287 | int __cpu_disable(void) |
| 1288 | { |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1289 | int cpu = smp_processor_id(); |
| 1290 | cpuinfo_sparc *c; |
| 1291 | int i; |
| 1292 | |
| 1293 | for_each_cpu_mask(i, cpu_core_map[cpu]) |
| 1294 | cpu_clear(cpu, cpu_core_map[i]); |
| 1295 | cpus_clear(cpu_core_map[cpu]); |
| 1296 | |
Mike Travis | d5a7430 | 2007-10-16 01:24:05 -0700 | [diff] [blame] | 1297 | for_each_cpu_mask(i, per_cpu(cpu_sibling_map, cpu)) |
| 1298 | cpu_clear(cpu, per_cpu(cpu_sibling_map, i)); |
| 1299 | cpus_clear(per_cpu(cpu_sibling_map, cpu)); |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1300 | |
| 1301 | c = &cpu_data(cpu); |
| 1302 | |
| 1303 | c->core_id = 0; |
| 1304 | c->proc_id = -1; |
| 1305 | |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1306 | smp_wmb(); |
| 1307 | |
| 1308 | /* Make sure no interrupts point to this cpu. */ |
| 1309 | fixup_irqs(); |
| 1310 | |
| 1311 | local_irq_enable(); |
| 1312 | mdelay(1); |
| 1313 | local_irq_disable(); |
| 1314 | |
Paul E. McKenney | 4d08461 | 2008-09-03 02:15:30 -0700 | [diff] [blame] | 1315 | ipi_call_lock(); |
| 1316 | cpu_clear(cpu, cpu_online_map); |
| 1317 | ipi_call_unlock(); |
| 1318 | |
Hong H. Pham | 280ff97 | 2009-06-04 02:10:11 -0700 | [diff] [blame] | 1319 | cpu_map_rebuild(); |
| 1320 | |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1321 | return 0; |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 1322 | } |
| 1323 | |
| 1324 | void __cpu_die(unsigned int cpu) |
| 1325 | { |
David S. Miller | e020440 | 2007-07-16 03:49:40 -0700 | [diff] [blame] | 1326 | int i; |
| 1327 | |
| 1328 | for (i = 0; i < 100; i++) { |
| 1329 | smp_rmb(); |
| 1330 | if (!cpu_isset(cpu, smp_commenced_mask)) |
| 1331 | break; |
| 1332 | msleep(100); |
| 1333 | } |
| 1334 | if (cpu_isset(cpu, smp_commenced_mask)) { |
| 1335 | printk(KERN_ERR "CPU %u didn't die...\n", cpu); |
| 1336 | } else { |
| 1337 | #if defined(CONFIG_SUN_LDOMS) |
| 1338 | unsigned long hv_err; |
| 1339 | int limit = 100; |
| 1340 | |
| 1341 | do { |
| 1342 | hv_err = sun4v_cpu_stop(cpu); |
| 1343 | if (hv_err == HV_EOK) { |
| 1344 | cpu_clear(cpu, cpu_present_map); |
| 1345 | break; |
| 1346 | } |
| 1347 | } while (--limit > 0); |
| 1348 | if (limit <= 0) { |
| 1349 | printk(KERN_ERR "sun4v_cpu_stop() fails err=%lu\n", |
| 1350 | hv_err); |
| 1351 | } |
| 1352 | #endif |
| 1353 | } |
David S. Miller | 4f0234f | 2007-07-13 16:03:42 -0700 | [diff] [blame] | 1354 | } |
| 1355 | #endif |
| 1356 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | void __init smp_cpus_done(unsigned int max_cpus) |
| 1358 | { |
David S. Miller | b62818e | 2011-02-15 15:04:07 -0800 | [diff] [blame] | 1359 | pcr_arch_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | } |
| 1361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | void smp_send_reschedule(int cpu) |
| 1363 | { |
David S. Miller | 1992663 | 2008-08-03 23:56:28 -0700 | [diff] [blame] | 1364 | xcall_deliver((u64) &xcall_receive_signal, 0, 0, |
| 1365 | &cpumask_of_cpu(cpu)); |
| 1366 | } |
| 1367 | |
David S. Miller | 9960e9e | 2010-04-07 04:41:33 -0700 | [diff] [blame] | 1368 | void __irq_entry smp_receive_signal_client(int irq, struct pt_regs *regs) |
David S. Miller | 1992663 | 2008-08-03 23:56:28 -0700 | [diff] [blame] | 1369 | { |
| 1370 | clear_softint(1 << irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | } |
| 1372 | |
| 1373 | /* This is a nop because we capture all other cpus |
| 1374 | * anyways when making the PROM active. |
| 1375 | */ |
| 1376 | void smp_send_stop(void) |
| 1377 | { |
| 1378 | } |
| 1379 | |
David S. Miller | 4fd78a5 | 2009-04-08 20:32:02 -0700 | [diff] [blame] | 1380 | /** |
| 1381 | * pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu |
| 1382 | * @cpu: cpu to allocate for |
| 1383 | * @size: size allocation in bytes |
| 1384 | * @align: alignment |
| 1385 | * |
| 1386 | * Allocate @size bytes aligned at @align for cpu @cpu. This wrapper |
| 1387 | * does the right thing for NUMA regardless of the current |
| 1388 | * configuration. |
| 1389 | * |
| 1390 | * RETURNS: |
| 1391 | * Pointer to the allocated area on success, NULL on failure. |
| 1392 | */ |
Tejun Heo | bcb2107 | 2009-08-14 15:00:53 +0900 | [diff] [blame] | 1393 | static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size, |
| 1394 | size_t align) |
David S. Miller | 4fd78a5 | 2009-04-08 20:32:02 -0700 | [diff] [blame] | 1395 | { |
| 1396 | const unsigned long goal = __pa(MAX_DMA_ADDRESS); |
| 1397 | #ifdef CONFIG_NEED_MULTIPLE_NODES |
| 1398 | int node = cpu_to_node(cpu); |
| 1399 | void *ptr; |
| 1400 | |
| 1401 | if (!node_online(node) || !NODE_DATA(node)) { |
| 1402 | ptr = __alloc_bootmem(size, align, goal); |
| 1403 | pr_info("cpu %d has no node %d or node-local memory\n", |
| 1404 | cpu, node); |
| 1405 | pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n", |
| 1406 | cpu, size, __pa(ptr)); |
| 1407 | } else { |
| 1408 | ptr = __alloc_bootmem_node(NODE_DATA(node), |
| 1409 | size, align, goal); |
| 1410 | pr_debug("per cpu data for cpu%d %lu bytes on node%d at " |
| 1411 | "%016lx\n", cpu, size, node, __pa(ptr)); |
| 1412 | } |
| 1413 | return ptr; |
| 1414 | #else |
| 1415 | return __alloc_bootmem(size, align, goal); |
| 1416 | #endif |
| 1417 | } |
| 1418 | |
Tejun Heo | bcb2107 | 2009-08-14 15:00:53 +0900 | [diff] [blame] | 1419 | static void __init pcpu_free_bootmem(void *ptr, size_t size) |
David S. Miller | 4fd78a5 | 2009-04-08 20:32:02 -0700 | [diff] [blame] | 1420 | { |
Tejun Heo | bcb2107 | 2009-08-14 15:00:53 +0900 | [diff] [blame] | 1421 | free_bootmem(__pa(ptr), size); |
| 1422 | } |
David S. Miller | 4fd78a5 | 2009-04-08 20:32:02 -0700 | [diff] [blame] | 1423 | |
Tejun Heo | a70c691 | 2009-09-24 18:18:55 +0900 | [diff] [blame] | 1424 | static int __init pcpu_cpu_distance(unsigned int from, unsigned int to) |
Tejun Heo | bcb2107 | 2009-08-14 15:00:53 +0900 | [diff] [blame] | 1425 | { |
| 1426 | if (cpu_to_node(from) == cpu_to_node(to)) |
| 1427 | return LOCAL_DISTANCE; |
| 1428 | else |
| 1429 | return REMOTE_DISTANCE; |
David S. Miller | 4fd78a5 | 2009-04-08 20:32:02 -0700 | [diff] [blame] | 1430 | } |
| 1431 | |
Tejun Heo | a70c691 | 2009-09-24 18:18:55 +0900 | [diff] [blame] | 1432 | static void __init pcpu_populate_pte(unsigned long addr) |
| 1433 | { |
| 1434 | pgd_t *pgd = pgd_offset_k(addr); |
| 1435 | pud_t *pud; |
| 1436 | pmd_t *pmd; |
| 1437 | |
| 1438 | pud = pud_offset(pgd, addr); |
| 1439 | if (pud_none(*pud)) { |
| 1440 | pmd_t *new; |
| 1441 | |
| 1442 | new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); |
| 1443 | pud_populate(&init_mm, pud, new); |
| 1444 | } |
| 1445 | |
| 1446 | pmd = pmd_offset(pud, addr); |
| 1447 | if (!pmd_present(*pmd)) { |
| 1448 | pte_t *new; |
| 1449 | |
| 1450 | new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); |
| 1451 | pmd_populate_kernel(&init_mm, pmd, new); |
| 1452 | } |
| 1453 | } |
| 1454 | |
David S. Miller | 73fffc0 | 2009-04-01 16:15:20 -0700 | [diff] [blame] | 1455 | void __init setup_per_cpu_areas(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | { |
Tejun Heo | bcb2107 | 2009-08-14 15:00:53 +0900 | [diff] [blame] | 1457 | unsigned long delta; |
| 1458 | unsigned int cpu; |
Tejun Heo | a70c691 | 2009-09-24 18:18:55 +0900 | [diff] [blame] | 1459 | int rc = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | |
Tejun Heo | a70c691 | 2009-09-24 18:18:55 +0900 | [diff] [blame] | 1461 | if (pcpu_chosen_fc != PCPU_FC_PAGE) { |
| 1462 | rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE, |
| 1463 | PERCPU_DYNAMIC_RESERVE, 4 << 20, |
| 1464 | pcpu_cpu_distance, |
| 1465 | pcpu_alloc_bootmem, |
| 1466 | pcpu_free_bootmem); |
| 1467 | if (rc) |
| 1468 | pr_warning("PERCPU: %s allocator failed (%d), " |
| 1469 | "falling back to page size\n", |
| 1470 | pcpu_fc_names[pcpu_chosen_fc], rc); |
| 1471 | } |
| 1472 | if (rc < 0) |
| 1473 | rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, |
| 1474 | pcpu_alloc_bootmem, |
| 1475 | pcpu_free_bootmem, |
| 1476 | pcpu_populate_pte); |
| 1477 | if (rc < 0) |
| 1478 | panic("cannot initialize percpu area (err=%d)", rc); |
David S. Miller | 4fd78a5 | 2009-04-08 20:32:02 -0700 | [diff] [blame] | 1479 | |
| 1480 | delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; |
Tejun Heo | fb435d5 | 2009-08-14 15:00:51 +0900 | [diff] [blame] | 1481 | for_each_possible_cpu(cpu) |
| 1482 | __per_cpu_offset(cpu) = delta + pcpu_unit_offsets[cpu]; |
David S. Miller | 951bc82 | 2006-05-31 01:24:02 -0700 | [diff] [blame] | 1483 | |
| 1484 | /* Setup %g5 for the boot cpu. */ |
| 1485 | __local_per_cpu_offset = __per_cpu_offset(smp_processor_id()); |
David S. Miller | b696fdc | 2009-05-26 22:37:25 -0700 | [diff] [blame] | 1486 | |
| 1487 | of_fill_in_cpu_data(); |
| 1488 | if (tlb_type == hypervisor) |
Stephen Rothwell | 6ac5c61 | 2009-06-15 03:06:18 -0700 | [diff] [blame] | 1489 | mdesc_fill_in_cpu_data(cpu_all_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | } |