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41a65d1618
Move platform specific register/un-register code, the RTAS calls, to register/un-register callback functions. This would also mean moving code that initializes and prints the platform specific FADump data. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Reviewed-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/156821332856.5656.16380417702046411631.stgit@hbathini.in.ibm.com
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/* 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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/*
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* The RMA region will be saved for later dumping when kernel crashes.
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* RMA is Real Mode Area, the first block of logical memory address owned
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* by logical partition, containing the storage that may be accessed with
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* translate off.
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*/
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#define RMA_START 0x0
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#define RMA_END (ppc64_rma_size)
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/*
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* On some Power systems where RMO is 128MB, it still requires minimum of
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* 256MB for kernel to boot successfully. When kdump infrastructure is
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* configured to save vmcore over network, we run into OOM issue while
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* loading modules related to network setup. Hence we need additional 64M
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* of memory to avoid OOM issue.
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*/
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#define MIN_BOOT_MEM (((RMA_END < (0x1UL << 28)) ? (0x1UL << 28) : RMA_END) \
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+ (0x1UL << 26))
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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 fad_crash_memory_ranges {
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unsigned long long base;
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unsigned long long size;
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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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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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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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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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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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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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#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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#endif /* _ASM_POWERPC_FADUMP_INTERNAL_H */
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