~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/metag/kernel/setup.c

Version: ~ [ linux-5.10-rc5 ] ~ [ linux-5.9.10 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.79 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.159 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.208 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.245 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.245 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (C) 2005-2012 Imagination Technologies Ltd.
  3  *
  4  * This file contains the architecture-dependant parts of system setup.
  5  *
  6  */
  7 
  8 #include <linux/export.h>
  9 #include <linux/bootmem.h>
 10 #include <linux/console.h>
 11 #include <linux/cpu.h>
 12 #include <linux/delay.h>
 13 #include <linux/errno.h>
 14 #include <linux/fs.h>
 15 #include <linux/genhd.h>
 16 #include <linux/init.h>
 17 #include <linux/initrd.h>
 18 #include <linux/interrupt.h>
 19 #include <linux/kernel.h>
 20 #include <linux/memblock.h>
 21 #include <linux/mm.h>
 22 #include <linux/of_fdt.h>
 23 #include <linux/of_platform.h>
 24 #include <linux/pfn.h>
 25 #include <linux/root_dev.h>
 26 #include <linux/sched.h>
 27 #include <linux/seq_file.h>
 28 #include <linux/start_kernel.h>
 29 #include <linux/string.h>
 30 
 31 #include <asm/cachepart.h>
 32 #include <asm/clock.h>
 33 #include <asm/core_reg.h>
 34 #include <asm/cpu.h>
 35 #include <asm/da.h>
 36 #include <asm/highmem.h>
 37 #include <asm/hwthread.h>
 38 #include <asm/l2cache.h>
 39 #include <asm/mach/arch.h>
 40 #include <asm/metag_mem.h>
 41 #include <asm/metag_regs.h>
 42 #include <asm/mmu.h>
 43 #include <asm/mmzone.h>
 44 #include <asm/processor.h>
 45 #include <asm/sections.h>
 46 #include <asm/setup.h>
 47 #include <asm/traps.h>
 48 
 49 /* Priv protect as many registers as possible. */
 50 #define DEFAULT_PRIV    (TXPRIVEXT_COPRO_BITS           | \
 51                          TXPRIVEXT_TXTRIGGER_BIT        | \
 52                          TXPRIVEXT_TXGBLCREG_BIT        | \
 53                          TXPRIVEXT_ILOCK_BIT            | \
 54                          TXPRIVEXT_TXITACCYC_BIT        | \
 55                          TXPRIVEXT_TXDIVTIME_BIT        | \
 56                          TXPRIVEXT_TXAMAREGX_BIT        | \
 57                          TXPRIVEXT_TXTIMERI_BIT         | \
 58                          TXPRIVEXT_TXSTATUS_BIT         | \
 59                          TXPRIVEXT_TXDISABLE_BIT)
 60 
 61 /* Meta2 specific bits. */
 62 #ifdef CONFIG_METAG_META12
 63 #define META2_PRIV      0
 64 #else
 65 #define META2_PRIV      (TXPRIVEXT_TXTIMER_BIT          | \
 66                          TXPRIVEXT_TRACE_BIT)
 67 #endif
 68 
 69 /* Unaligned access checking bits. */
 70 #ifdef CONFIG_METAG_UNALIGNED
 71 #define UNALIGNED_PRIV  TXPRIVEXT_ALIGNREW_BIT
 72 #else
 73 #define UNALIGNED_PRIV  0
 74 #endif
 75 
 76 #define PRIV_BITS       (DEFAULT_PRIV                   | \
 77                          META2_PRIV                     | \
 78                          UNALIGNED_PRIV)
 79 
 80 /*
 81  * Protect access to:
 82  * 0x06000000-0x07ffffff Direct mapped region
 83  * 0x05000000-0x05ffffff MMU table region (Meta1)
 84  * 0x04400000-0x047fffff Cache flush region
 85  * 0x84000000-0x87ffffff Core cache memory region (Meta2)
 86  *
 87  * Allow access to:
 88  * 0x80000000-0x81ffffff Core code memory region (Meta2)
 89  */
 90 #ifdef CONFIG_METAG_META12
 91 #define PRIVSYSR_BITS   TXPRIVSYSR_ALL_BITS
 92 #else
 93 #define PRIVSYSR_BITS   (TXPRIVSYSR_ALL_BITS & ~TXPRIVSYSR_CORECODE_BIT)
 94 #endif
 95 
 96 /* Protect all 0x02xxxxxx and 0x048xxxxx. */
 97 #define PIOREG_BITS     0xffffffff
 98 
 99 /*
100  * Protect all 0x04000xx0 (system events)
101  * except write combiner flush and write fence (system events 4 and 5).
102  */
103 #define PSYREG_BITS     0xfffffffb
104 
105 
106 extern char _heap_start[];
107 
108 #ifdef CONFIG_METAG_BUILTIN_DTB
109 extern u32 __dtb_start[];
110 #endif
111 
112 #ifdef CONFIG_DA_CONSOLE
113 /* Our early channel based console driver */
114 extern struct console dash_console;
115 #endif
116 
117 const struct machine_desc *machine_desc __initdata;
118 
119 /*
120  * Map a Linux CPU number to a hardware thread ID
121  * In SMP this will be setup with the correct mapping at startup; in UP this
122  * will map to the HW thread on which we are running.
123  */
124 u8 cpu_2_hwthread_id[NR_CPUS] __read_mostly = {
125         [0 ... NR_CPUS-1] = BAD_HWTHREAD_ID
126 };
127 EXPORT_SYMBOL_GPL(cpu_2_hwthread_id);
128 
129 /*
130  * Map a hardware thread ID to a Linux CPU number
131  * In SMP this will be fleshed out with the correct CPU ID for a particular
132  * hardware thread. In UP this will be initialised with the boot CPU ID.
133  */
134 u8 hwthread_id_2_cpu[4] __read_mostly = {
135         [0 ... 3] = BAD_CPU_ID
136 };
137 
138 /* The relative offset of the MMU mapped memory (from ldlk or bootloader)
139  * to the real physical memory.  This is needed as we have to use the
140  * physical addresses in the MMU tables (pte entries), and not the virtual
141  * addresses.
142  * This variable is used in the __pa() and __va() macros, and should
143  * probably only be used via them.
144  */
145 unsigned int meta_memoffset;
146 EXPORT_SYMBOL(meta_memoffset);
147 
148 static char __initdata *original_cmd_line;
149 
150 DEFINE_PER_CPU(PTBI, pTBI);
151 
152 /*
153  * Mapping are specified as "CPU_ID:HWTHREAD_ID", e.g.
154  *
155  *      "hwthread_map=0:1,1:2,2:3,3:0"
156  *
157  *      Linux CPU ID    HWTHREAD_ID
158  *      ---------------------------
159  *          0                 1
160  *          1                 2
161  *          2                 3
162  *          3                 0
163  */
164 static int __init parse_hwthread_map(char *p)
165 {
166         int cpu;
167 
168         while (*p) {
169                 cpu = (*p++) - '';
170                 if (cpu < 0 || cpu > 9)
171                         goto err_cpu;
172 
173                 p++;            /* skip semi-colon */
174                 cpu_2_hwthread_id[cpu] = (*p++) - '';
175                 if (cpu_2_hwthread_id[cpu] >= 4)
176                         goto err_thread;
177                 hwthread_id_2_cpu[cpu_2_hwthread_id[cpu]] = cpu;
178 
179                 if (*p == ',')
180                         p++;            /* skip comma */
181         }
182 
183         return 0;
184 err_cpu:
185         pr_err("%s: hwthread_map cpu argument out of range\n", __func__);
186         return -EINVAL;
187 err_thread:
188         pr_err("%s: hwthread_map thread argument out of range\n", __func__);
189         return -EINVAL;
190 }
191 early_param("hwthread_map", parse_hwthread_map);
192 
193 void __init dump_machine_table(void)
194 {
195         struct machine_desc *p;
196         const char **compat;
197 
198         pr_info("Available machine support:\n\tNAME\t\tCOMPATIBLE LIST\n");
199         for_each_machine_desc(p) {
200                 pr_info("\t%s\t[", p->name);
201                 for (compat = p->dt_compat; compat && *compat; ++compat)
202                         printk(" '%s'", *compat);
203                 printk(" ]\n");
204         }
205 
206         pr_info("\nPlease check your kernel config and/or bootloader.\n");
207 
208         hard_processor_halt(HALT_PANIC);
209 }
210 
211 #ifdef CONFIG_METAG_HALT_ON_PANIC
212 static int metag_panic_event(struct notifier_block *this, unsigned long event,
213                              void *ptr)
214 {
215         hard_processor_halt(HALT_PANIC);
216         return NOTIFY_DONE;
217 }
218 
219 static struct notifier_block metag_panic_block = {
220         metag_panic_event,
221         NULL,
222         0
223 };
224 #endif
225 
226 void __init setup_arch(char **cmdline_p)
227 {
228         unsigned long start_pfn;
229         unsigned long text_start = (unsigned long)(&_stext);
230         unsigned long cpu = smp_processor_id();
231         unsigned long heap_start, heap_end;
232         unsigned long start_pte;
233         PTBI _pTBI;
234         PTBISEG p_heap;
235         int heap_id, i;
236 
237         metag_cache_probe();
238 
239         metag_da_probe();
240 #ifdef CONFIG_DA_CONSOLE
241         if (metag_da_enabled()) {
242                 /* An early channel based console driver */
243                 register_console(&dash_console);
244                 add_preferred_console("ttyDA", 1, NULL);
245         }
246 #endif
247 
248         /* try interpreting the argument as a device tree */
249         machine_desc = setup_machine_fdt(original_cmd_line);
250         /* if it doesn't look like a device tree it must be a command line */
251         if (!machine_desc) {
252 #ifdef CONFIG_METAG_BUILTIN_DTB
253                 /* try the embedded device tree */
254                 machine_desc = setup_machine_fdt(__dtb_start);
255                 if (!machine_desc)
256                         panic("Invalid embedded device tree.");
257 #else
258                 /* use the default machine description */
259                 machine_desc = default_machine_desc();
260 #endif
261 #ifndef CONFIG_CMDLINE_FORCE
262                 /* append the bootloader cmdline to any builtin fdt cmdline */
263                 if (boot_command_line[0] && original_cmd_line[0])
264                         strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
265                 strlcat(boot_command_line, original_cmd_line,
266                         COMMAND_LINE_SIZE);
267 #endif
268         }
269         setup_meta_clocks(machine_desc->clocks);
270 
271         *cmdline_p = boot_command_line;
272         parse_early_param();
273 
274         /*
275          * Make sure we don't alias in dcache or icache
276          */
277         check_for_cache_aliasing(cpu);
278 
279 
280 #ifdef CONFIG_METAG_HALT_ON_PANIC
281         atomic_notifier_chain_register(&panic_notifier_list,
282                                        &metag_panic_block);
283 #endif
284 
285 #ifdef CONFIG_DUMMY_CONSOLE
286         conswitchp = &dummy_con;
287 #endif
288 
289         if (!(__core_reg_get(TXSTATUS) & TXSTATUS_PSTAT_BIT))
290                 panic("Privilege must be enabled for this thread.");
291 
292         _pTBI = __TBI(TBID_ISTAT_BIT);
293 
294         per_cpu(pTBI, cpu) = _pTBI;
295 
296         if (!per_cpu(pTBI, cpu))
297                 panic("No TBI found!");
298 
299         /*
300          * Initialize all interrupt vectors to our copy of __TBIUnExpXXX,
301          * rather than the version from the bootloader. This makes call
302          * stacks easier to understand and may allow us to unmap the
303          * bootloader at some point.
304          */
305         for (i = 0; i <= TBID_SIGNUM_MAX; i++)
306                 _pTBI->fnSigs[i] = __TBIUnExpXXX;
307 
308         /* A Meta requirement is that the kernel is loaded (virtually)
309          * at the PAGE_OFFSET.
310          */
311         if (PAGE_OFFSET != text_start)
312                 panic("Kernel not loaded at PAGE_OFFSET (%#x) but at %#lx.",
313                       PAGE_OFFSET, text_start);
314 
315         start_pte = mmu_read_second_level_page(text_start);
316 
317         /*
318          * Kernel pages should have the PRIV bit set by the bootloader.
319          */
320         if (!(start_pte & _PAGE_KERNEL))
321                 panic("kernel pte does not have PRIV set");
322 
323         /*
324          * See __pa and __va in include/asm/page.h.
325          * This value is negative when running in local space but the
326          * calculations work anyway.
327          */
328         meta_memoffset = text_start - (start_pte & PAGE_MASK);
329 
330         /* Now lets look at the heap space */
331         heap_id = (__TBIThreadId() & TBID_THREAD_BITS)
332                 + TBID_SEG(0, TBID_SEGSCOPE_LOCAL, TBID_SEGTYPE_HEAP);
333 
334         p_heap = __TBIFindSeg(NULL, heap_id);
335 
336         if (!p_heap)
337                 panic("Could not find heap from TBI!");
338 
339         /* The heap begins at the first full page after the kernel data. */
340         heap_start = (unsigned long) &_heap_start;
341 
342         /* The heap ends at the end of the heap segment specified with
343          * ldlk.
344          */
345         if (is_global_space(text_start)) {
346                 pr_debug("WARNING: running in global space!\n");
347                 heap_end = (unsigned long)p_heap->pGAddr + p_heap->Bytes;
348         } else {
349                 heap_end = (unsigned long)p_heap->pLAddr + p_heap->Bytes;
350         }
351 
352         ROOT_DEV = Root_RAM0;
353 
354         /* init_mm is the mm struct used for the first task.  It is then
355          * cloned for all other tasks spawned from that task.
356          *
357          * Note - we are using the virtual addresses here.
358          */
359         init_mm.start_code = (unsigned long)(&_stext);
360         init_mm.end_code = (unsigned long)(&_etext);
361         init_mm.end_data = (unsigned long)(&_edata);
362         init_mm.brk = (unsigned long)heap_start;
363 
364         min_low_pfn = PFN_UP(__pa(text_start));
365         max_low_pfn = PFN_DOWN(__pa(heap_end));
366 
367         pfn_base = min_low_pfn;
368 
369         /* Round max_pfn up to a 4Mb boundary. The free_bootmem_node()
370          * call later makes sure to keep the rounded up pages marked reserved.
371          */
372         max_pfn = max_low_pfn + ((1 << MAX_ORDER) - 1);
373         max_pfn &= ~((1 << MAX_ORDER) - 1);
374 
375         start_pfn = PFN_UP(__pa(heap_start));
376 
377         if (min_low_pfn & ((1 << MAX_ORDER) - 1)) {
378                 /* Theoretically, we could expand the space that the
379                  * bootmem allocator covers - much as we do for the
380                  * 'high' address, and then tell the bootmem system
381                  * that the lowest chunk is 'not available'.  Right
382                  * now it is just much easier to constrain the
383                  * user to always MAX_ORDER align their kernel space.
384                  */
385 
386                 panic("Kernel must be %d byte aligned, currently at %#lx.",
387                       1 << (MAX_ORDER + PAGE_SHIFT),
388                       min_low_pfn << PAGE_SHIFT);
389         }
390 
391 #ifdef CONFIG_HIGHMEM
392         highstart_pfn = highend_pfn = max_pfn;
393         high_memory = (void *) __va(PFN_PHYS(highstart_pfn));
394 #else
395         high_memory = (void *)__va(PFN_PHYS(max_pfn));
396 #endif
397 
398         paging_init(heap_end);
399 
400         setup_priv();
401 
402         /* Setup the boot cpu's mapping. The rest will be setup below. */
403         cpu_2_hwthread_id[smp_processor_id()] = hard_processor_id();
404         hwthread_id_2_cpu[hard_processor_id()] = smp_processor_id();
405 
406         unflatten_and_copy_device_tree();
407 
408 #ifdef CONFIG_SMP
409         smp_init_cpus();
410 #endif
411 
412         if (machine_desc->init_early)
413                 machine_desc->init_early();
414 }
415 
416 static int __init customize_machine(void)
417 {
418         /* customizes platform devices, or adds new ones */
419         if (machine_desc->init_machine)
420                 machine_desc->init_machine();
421         else
422                 of_platform_populate(NULL, of_default_bus_match_table, NULL,
423                                      NULL);
424         return 0;
425 }
426 arch_initcall(customize_machine);
427 
428 static int __init init_machine_late(void)
429 {
430         if (machine_desc->init_late)
431                 machine_desc->init_late();
432         return 0;
433 }
434 late_initcall(init_machine_late);
435 
436 #ifdef CONFIG_PROC_FS
437 /*
438  *      Get CPU information for use by the procfs.
439  */
440 static const char *get_cpu_capabilities(unsigned int txenable)
441 {
442 #ifdef CONFIG_METAG_META21
443         /* See CORE_ID in META HTP.GP TRM - Architecture Overview 2.1.238 */
444         int coreid = metag_in32(METAC_CORE_ID);
445         unsigned int dsp_type = (coreid >> 3) & 7;
446         unsigned int fpu_type = (coreid >> 7) & 3;
447 
448         switch (dsp_type | fpu_type << 3) {
449         case (0x00): return "EDSP";
450         case (0x01): return "DSP";
451         case (0x08): return "EDSP+LFPU";
452         case (0x09): return "DSP+LFPU";
453         case (0x10): return "EDSP+FPU";
454         case (0x11): return "DSP+FPU";
455         }
456         return "UNKNOWN";
457 
458 #else
459         if (!(txenable & TXENABLE_CLASS_BITS))
460                 return "DSP";
461         else
462                 return "";
463 #endif
464 }
465 
466 static int show_cpuinfo(struct seq_file *m, void *v)
467 {
468         const char *cpu;
469         unsigned int txenable, thread_id, major, minor;
470         unsigned long clockfreq = get_coreclock();
471 #ifdef CONFIG_SMP
472         int i;
473         unsigned long lpj;
474 #endif
475 
476         cpu = "META";
477 
478         txenable = __core_reg_get(TXENABLE);
479         major = (txenable & TXENABLE_MAJOR_REV_BITS) >> TXENABLE_MAJOR_REV_S;
480         minor = (txenable & TXENABLE_MINOR_REV_BITS) >> TXENABLE_MINOR_REV_S;
481         thread_id = (txenable >> 8) & 0x3;
482 
483 #ifdef CONFIG_SMP
484         for_each_online_cpu(i) {
485                 lpj = per_cpu(cpu_data, i).loops_per_jiffy;
486                 txenable = core_reg_read(TXUCT_ID, TXENABLE_REGNUM,
487                                                         cpu_2_hwthread_id[i]);
488 
489                 seq_printf(m, "CPU:\t\t%s %d.%d (thread %d)\n"
490                               "Clocking:\t%lu.%1luMHz\n"
491                               "BogoMips:\t%lu.%02lu\n"
492                               "Calibration:\t%lu loops\n"
493                               "Capabilities:\t%s\n\n",
494                               cpu, major, minor, i,
495                               clockfreq / 1000000, (clockfreq / 100000) % 10,
496                               lpj / (500000 / HZ), (lpj / (5000 / HZ)) % 100,
497                               lpj,
498                               get_cpu_capabilities(txenable));
499         }
500 #else
501         seq_printf(m, "CPU:\t\t%s %d.%d (thread %d)\n"
502                    "Clocking:\t%lu.%1luMHz\n"
503                    "BogoMips:\t%lu.%02lu\n"
504                    "Calibration:\t%lu loops\n"
505                    "Capabilities:\t%s\n",
506                    cpu, major, minor, thread_id,
507                    clockfreq / 1000000, (clockfreq / 100000) % 10,
508                    loops_per_jiffy / (500000 / HZ),
509                    (loops_per_jiffy / (5000 / HZ)) % 100,
510                    loops_per_jiffy,
511                    get_cpu_capabilities(txenable));
512 #endif /* CONFIG_SMP */
513 
514 #ifdef CONFIG_METAG_L2C
515         if (meta_l2c_is_present()) {
516                 seq_printf(m, "L2 cache:\t%s\n"
517                               "L2 cache size:\t%d KB\n",
518                               meta_l2c_is_enabled() ? "enabled" : "disabled",
519                               meta_l2c_size() >> 10);
520         }
521 #endif
522         return 0;
523 }
524 
525 static void *c_start(struct seq_file *m, loff_t *pos)
526 {
527         return (void *)(*pos == 0);
528 }
529 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
530 {
531         return NULL;
532 }
533 static void c_stop(struct seq_file *m, void *v)
534 {
535 }
536 const struct seq_operations cpuinfo_op = {
537         .start = c_start,
538         .next  = c_next,
539         .stop  = c_stop,
540         .show  = show_cpuinfo,
541 };
542 #endif /* CONFIG_PROC_FS */
543 
544 void __init metag_start_kernel(char *args)
545 {
546         /* Zero the timer register so timestamps are from the point at
547          * which the kernel started running.
548          */
549         __core_reg_set(TXTIMER, 0);
550 
551         /* Clear the bss. */
552         memset(__bss_start, 0,
553                (unsigned long)__bss_stop - (unsigned long)__bss_start);
554 
555         /* Remember where these are for use in setup_arch */
556         original_cmd_line = args;
557 
558         current_thread_info()->cpu = hard_processor_id();
559 
560         start_kernel();
561 }
562 
563 /**
564  * setup_priv() - Set up privilege protection registers.
565  *
566  * Set up privilege protection registers such as TXPRIVEXT to prevent userland
567  * from touching our precious registers and sensitive memory areas.
568  */
569 void setup_priv(void)
570 {
571         unsigned int offset = hard_processor_id() << TXPRIVREG_STRIDE_S;
572 
573         __core_reg_set(TXPRIVEXT, PRIV_BITS);
574 
575         metag_out32(PRIVSYSR_BITS, T0PRIVSYSR + offset);
576         metag_out32(PIOREG_BITS,   T0PIOREG   + offset);
577         metag_out32(PSYREG_BITS,   T0PSYREG   + offset);
578 }
579 
580 PTBI pTBI_get(unsigned int cpu)
581 {
582         return per_cpu(pTBI, cpu);
583 }
584 EXPORT_SYMBOL(pTBI_get);
585 
586 #if defined(CONFIG_METAG_DSP) && defined(CONFIG_METAG_FPU)
587 static char capabilities[] = "dsp fpu";
588 #elif defined(CONFIG_METAG_DSP)
589 static char capabilities[] = "dsp";
590 #elif defined(CONFIG_METAG_FPU)
591 static char capabilities[] = "fpu";
592 #else
593 static char capabilities[] = "";
594 #endif
595 
596 static struct ctl_table caps_kern_table[] = {
597         {
598                 .procname       = "capabilities",
599                 .data           = capabilities,
600                 .maxlen         = sizeof(capabilities),
601                 .mode           = 0444,
602                 .proc_handler   = proc_dostring,
603         },
604         {}
605 };
606 
607 static struct ctl_table caps_root_table[] = {
608         {
609                 .procname       = "kernel",
610                 .mode           = 0555,
611                 .child          = caps_kern_table,
612         },
613         {}
614 };
615 
616 static int __init capabilities_register_sysctl(void)
617 {
618         struct ctl_table_header *caps_table_header;
619 
620         caps_table_header = register_sysctl_table(caps_root_table);
621         if (!caps_table_header) {
622                 pr_err("Unable to register CAPABILITIES sysctl\n");
623                 return -ENOMEM;
624         }
625 
626         return 0;
627 }
628 
629 core_initcall(capabilities_register_sysctl);
630 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp