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171 lines
4.4 KiB
171 lines
4.4 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Firmware-Assisted Dump internal code. |
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* |
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* Copyright 2011, Mahesh Salgaonkar, IBM Corporation. |
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* Copyright 2019, Hari Bathini, IBM Corporation. |
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*/ |
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#ifndef _ASM_POWERPC_FADUMP_INTERNAL_H |
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#define _ASM_POWERPC_FADUMP_INTERNAL_H |
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/* Maximum number of memory regions kernel supports */ |
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#define FADUMP_MAX_MEM_REGS 128 |
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#ifndef CONFIG_PRESERVE_FA_DUMP |
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/* The upper limit percentage for user specified boot memory size (25%) */ |
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#define MAX_BOOT_MEM_RATIO 4 |
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#define memblock_num_regions(memblock_type) (memblock.memblock_type.cnt) |
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/* Alignment per CMA requirement. */ |
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#define FADUMP_CMA_ALIGNMENT (PAGE_SIZE << \ |
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max_t(unsigned long, MAX_ORDER - 1, \ |
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pageblock_order)) |
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/* FAD commands */ |
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#define FADUMP_REGISTER 1 |
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#define FADUMP_UNREGISTER 2 |
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#define FADUMP_INVALIDATE 3 |
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/* |
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* Copy the ascii values for first 8 characters from a string into u64 |
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* variable at their respective indexes. |
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* e.g. |
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* The string "FADMPINF" will be converted into 0x4641444d50494e46 |
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*/ |
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static inline u64 fadump_str_to_u64(const char *str) |
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{ |
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u64 val = 0; |
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int i; |
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for (i = 0; i < sizeof(val); i++) |
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val = (*str) ? (val << 8) | *str++ : val << 8; |
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return val; |
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} |
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#define FADUMP_CPU_UNKNOWN (~((u32)0)) |
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#define FADUMP_CRASH_INFO_MAGIC fadump_str_to_u64("FADMPINF") |
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/* fadump crash info structure */ |
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struct fadump_crash_info_header { |
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u64 magic_number; |
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u64 elfcorehdr_addr; |
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u32 crashing_cpu; |
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struct pt_regs regs; |
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struct cpumask online_mask; |
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}; |
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struct fadump_memory_range { |
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u64 base; |
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u64 size; |
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}; |
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/* fadump memory ranges info */ |
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#define RNG_NAME_SZ 16 |
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struct fadump_mrange_info { |
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char name[RNG_NAME_SZ]; |
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struct fadump_memory_range *mem_ranges; |
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u32 mem_ranges_sz; |
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u32 mem_range_cnt; |
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u32 max_mem_ranges; |
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bool is_static; |
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}; |
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/* Platform specific callback functions */ |
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struct fadump_ops; |
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/* Firmware-assisted dump configuration details. */ |
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struct fw_dump { |
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unsigned long reserve_dump_area_start; |
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unsigned long reserve_dump_area_size; |
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/* cmd line option during boot */ |
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unsigned long reserve_bootvar; |
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unsigned long cpu_state_data_size; |
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u64 cpu_state_dest_vaddr; |
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u32 cpu_state_data_version; |
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u32 cpu_state_entry_size; |
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unsigned long hpte_region_size; |
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unsigned long boot_memory_size; |
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u64 boot_mem_dest_addr; |
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u64 boot_mem_addr[FADUMP_MAX_MEM_REGS]; |
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u64 boot_mem_sz[FADUMP_MAX_MEM_REGS]; |
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u64 boot_mem_top; |
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u64 boot_mem_regs_cnt; |
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unsigned long fadumphdr_addr; |
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unsigned long cpu_notes_buf_vaddr; |
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unsigned long cpu_notes_buf_size; |
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/* |
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* Maximum size supported by firmware to copy from source to |
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* destination address per entry. |
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*/ |
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u64 max_copy_size; |
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u64 kernel_metadata; |
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int ibm_configure_kernel_dump; |
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unsigned long fadump_enabled:1; |
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unsigned long fadump_supported:1; |
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unsigned long dump_active:1; |
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unsigned long dump_registered:1; |
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unsigned long nocma:1; |
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struct fadump_ops *ops; |
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}; |
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struct fadump_ops { |
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u64 (*fadump_init_mem_struct)(struct fw_dump *fadump_conf); |
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u64 (*fadump_get_metadata_size)(void); |
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int (*fadump_setup_metadata)(struct fw_dump *fadump_conf); |
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u64 (*fadump_get_bootmem_min)(void); |
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int (*fadump_register)(struct fw_dump *fadump_conf); |
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int (*fadump_unregister)(struct fw_dump *fadump_conf); |
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int (*fadump_invalidate)(struct fw_dump *fadump_conf); |
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void (*fadump_cleanup)(struct fw_dump *fadump_conf); |
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int (*fadump_process)(struct fw_dump *fadump_conf); |
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void (*fadump_region_show)(struct fw_dump *fadump_conf, |
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struct seq_file *m); |
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void (*fadump_trigger)(struct fadump_crash_info_header *fdh, |
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const char *msg); |
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}; |
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/* Helper functions */ |
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s32 fadump_setup_cpu_notes_buf(u32 num_cpus); |
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void fadump_free_cpu_notes_buf(void); |
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u32 *fadump_regs_to_elf_notes(u32 *buf, struct pt_regs *regs); |
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void fadump_update_elfcore_header(char *bufp); |
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bool is_fadump_boot_mem_contiguous(void); |
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bool is_fadump_reserved_mem_contiguous(void); |
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#else /* !CONFIG_PRESERVE_FA_DUMP */ |
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/* Firmware-assisted dump configuration details. */ |
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struct fw_dump { |
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u64 boot_mem_top; |
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u64 dump_active; |
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}; |
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#endif /* CONFIG_PRESERVE_FA_DUMP */ |
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#ifdef CONFIG_PPC_PSERIES |
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extern void rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node); |
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#else |
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static inline void |
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rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { } |
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#endif |
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#ifdef CONFIG_PPC_POWERNV |
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extern void opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node); |
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#else |
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static inline void |
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opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { } |
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#endif |
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#endif /* _ASM_POWERPC_FADUMP_INTERNAL_H */
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