arch/arm64/kernel/vmcore_info.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) Linaro.
   4  * Copyright (C) Huawei Futurewei Technologies.
   5  */
   6
   7 #include <linux/vmcore_info.h>
   8 #include <asm/cpufeature.h>
   9 #include <asm/memory.h>
  10 #include <asm/pgtable-hwdef.h>
  11 #include <asm/pointer_auth.h>
  12
  13 static inline u64 get_tcr_el1_t1sz(void);
  14
  15 static inline u64 get_tcr_el1_t1sz(void)
  16 {
  17         return (read_sysreg(tcr_el1) & TCR_T1SZ_MASK) >> TCR_T1SZ_OFFSET;
  18 }
  19
  20 void arch_crash_save_vmcoreinfo(void)
  21 {
  22         VMCOREINFO_NUMBER(VA_BITS);
  23         /* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */
  24         vmcoreinfo_append_str("NUMBER(MODULES_VADDR)=0x%lx\n", MODULES_VADDR);
  25         vmcoreinfo_append_str("NUMBER(MODULES_END)=0x%lx\n", MODULES_END);
  26         vmcoreinfo_append_str("NUMBER(VMALLOC_END)=0x%lx\n", VMALLOC_END);
  27         vmcoreinfo_append_str("NUMBER(VMEMMAP_START)=0x%lx\n", VMEMMAP_START);
  28         vmcoreinfo_append_str("NUMBER(VMEMMAP_END)=0x%lx\n", VMEMMAP_END);
  29         vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n",
  30                                                 kimage_voffset);
  31         vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n",
  32                                                 PHYS_OFFSET);
  33         vmcoreinfo_append_str("NUMBER(TCR_EL1_T1SZ)=0x%llx\n",
  34                                                 get_tcr_el1_t1sz());
  35         vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset());
  36         vmcoreinfo_append_str("NUMBER(KERNELPACMASK)=0x%llx\n",
  37                                                 system_supports_address_auth() ?
  38                                                 ptrauth_kernel_pac_mask() : 0);
  39 }