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87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
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/* 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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#define FADUMP_CRASH_INFO_MAGIC 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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/* 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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unsigned long fadumphdr_addr;
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unsigned long cpu_notes_buf;
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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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};
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#endif /* _ASM_POWERPC_FADUMP_INTERNAL_H */
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