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The following interrelated ranges are needed by the kdump crash tool: MODULES_VADDR ~ MODULES_END, VMALLOC_START ~ VMALLOC_END, VMEMMAP_START ~ VMEMMAP_END Since these values change from time to time, it is preferable to export them via vmcoreinfo than to change the crash's code frequently. Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com> Link: https://lore.kernel.org/r/20220209092642.9181-1-shijie@os.amperecomputing.com Signed-off-by: Will Deacon <will@kernel.org>
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) Linaro.
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* Copyright (C) Huawei Futurewei Technologies.
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*/
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#include <linux/crash_core.h>
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#include <asm/cpufeature.h>
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#include <asm/memory.h>
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#include <asm/pgtable-hwdef.h>
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static inline u64 get_tcr_el1_t1sz(void);
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static inline u64 get_tcr_el1_t1sz(void)
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{
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return (read_sysreg(tcr_el1) & TCR_T1SZ_MASK) >> TCR_T1SZ_OFFSET;
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}
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void arch_crash_save_vmcoreinfo(void)
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{
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VMCOREINFO_NUMBER(VA_BITS);
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/* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */
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vmcoreinfo_append_str("NUMBER(MODULES_VADDR)=0x%lx\n", MODULES_VADDR);
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vmcoreinfo_append_str("NUMBER(MODULES_END)=0x%lx\n", MODULES_END);
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vmcoreinfo_append_str("NUMBER(VMALLOC_START)=0x%lx\n", VMALLOC_START);
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vmcoreinfo_append_str("NUMBER(VMALLOC_END)=0x%lx\n", VMALLOC_END);
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vmcoreinfo_append_str("NUMBER(VMEMMAP_START)=0x%lx\n", VMEMMAP_START);
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vmcoreinfo_append_str("NUMBER(VMEMMAP_END)=0x%lx\n", VMEMMAP_END);
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vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n",
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kimage_voffset);
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vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n",
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PHYS_OFFSET);
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vmcoreinfo_append_str("NUMBER(TCR_EL1_T1SZ)=0x%llx\n",
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get_tcr_el1_t1sz());
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vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset());
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vmcoreinfo_append_str("NUMBER(KERNELPACMASK)=0x%llx\n",
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system_supports_address_auth() ?
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ptrauth_kernel_pac_mask() : 0);
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}
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