arch/s390/boot/pgm_check_info.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/stdarg.h>
   4 #include <linux/string.h>
   5 #include <linux/ctype.h>
   6 #include <asm/stacktrace.h>
   7 #include <asm/boot_data.h>
   8 #include <asm/lowcore.h>
   9 #include <asm/setup.h>
  10 #include <asm/sclp.h>
  11 #include <asm/uv.h>
  12 #include "boot.h"
  13
  14 void print_stacktrace(unsigned long sp)
  15 {
  16         struct stack_info boot_stack = { STACK_TYPE_TASK, (unsigned long)_stack_start,
  17                                          (unsigned long)_stack_end };
  18         bool first = true;
  19
  20         boot_printk("Call Trace:\n");
  21         while (!(sp & 0x7) && on_stack(&boot_stack, sp, sizeof(struct stack_frame))) {
  22                 struct stack_frame *sf = (struct stack_frame *)sp;
  23
  24                 boot_printk(first ? "(sp:%016lx [<%016lx>] %pS)\n" :
  25                                     " sp:%016lx [<%016lx>] %pS\n",
  26                             sp, sf->gprs[8], (void *)sf->gprs[8]);
  27                 if (sf->back_chain <= sp)
  28                         break;
  29                 sp = sf->back_chain;
  30                 first = false;
  31         }
  32 }
  33
  34 void print_pgm_check_info(void)
  35 {
  36         unsigned long *gpregs = (unsigned long *)get_lowcore()->gpregs_save_area;
  37         struct psw_bits *psw = &psw_bits(get_lowcore()->psw_save_area);
  38
  39         boot_printk("Linux version %s\n", kernel_version);
  40         if (!is_prot_virt_guest() && early_command_line[0])
  41                 boot_printk("Kernel command line: %s\n", early_command_line);
  42         boot_printk("Kernel fault: interruption code %04x ilc:%x\n",
  43                     get_lowcore()->pgm_code, get_lowcore()->pgm_ilc >> 1);
  44         if (kaslr_enabled()) {
  45                 boot_printk("Kernel random base: %lx\n", __kaslr_offset);
  46                 boot_printk("Kernel random base phys: %lx\n", __kaslr_offset_phys);
  47         }
  48         boot_printk("PSW : %016lx %016lx (%pS)\n",
  49                     get_lowcore()->psw_save_area.mask,
  50                     get_lowcore()->psw_save_area.addr,
  51                     (void *)get_lowcore()->psw_save_area.addr);
  52         boot_printk(
  53                 "      R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x P:%x AS:%x CC:%x PM:%x RI:%x EA:%x\n",
  54                 psw->per, psw->dat, psw->io, psw->ext, psw->key, psw->mcheck,
  55                 psw->wait, psw->pstate, psw->as, psw->cc, psw->pm, psw->ri,
  56                 psw->eaba);
  57         boot_printk("GPRS: %016lx %016lx %016lx %016lx\n", gpregs[0], gpregs[1], gpregs[2], gpregs[3]);
  58         boot_printk("      %016lx %016lx %016lx %016lx\n", gpregs[4], gpregs[5], gpregs[6], gpregs[7]);
  59         boot_printk("      %016lx %016lx %016lx %016lx\n", gpregs[8], gpregs[9], gpregs[10], gpregs[11]);
  60         boot_printk("      %016lx %016lx %016lx %016lx\n", gpregs[12], gpregs[13], gpregs[14], gpregs[15]);
  61         print_stacktrace(get_lowcore()->gpregs_save_area[15]);
  62         boot_printk("Last Breaking-Event-Address:\n");
  63         boot_printk(" [<%016lx>] %pS\n", (unsigned long)get_lowcore()->pgm_last_break,
  64                     (void *)get_lowcore()->pgm_last_break);
  65 }