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2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390 
 kernel/arch/powerpc/include/asm/fadump.h
....@@ -1,209 +1,19 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
12 /*
23  * Firmware Assisted dump header file.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
174  *
185  * Copyright 2011 IBM Corporation
196  * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
207  */
218 
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-#ifndef __PPC64_FA_DUMP_H__
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-#define __PPC64_FA_DUMP_H__
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+#ifndef _ASM_POWERPC_FADUMP_H
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+#define _ASM_POWERPC_FADUMP_H
2411 
2512 #ifdef CONFIG_FA_DUMP
2613 
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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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-/*
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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 aditional 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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-
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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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-
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-#define memblock_num_regions(memblock_type)	(memblock.memblock_type.cnt)
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-
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-/* Firmware provided dump sections */
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-#define FADUMP_CPU_STATE_DATA	0x0001
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-#define FADUMP_HPTE_REGION	0x0002
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-#define FADUMP_REAL_MODE_REGION	0x0011
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-
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-/* Dump request flag */
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-#define FADUMP_REQUEST_FLAG	0x00000001
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-
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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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-/* Dump status flag */
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-#define FADUMP_ERROR_FLAG	0x2000
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-
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-#define FADUMP_CPU_ID_MASK	((1UL << 32) - 1)
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-
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-#define CPU_UNKNOWN		(~((u32)0))
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-
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-/* Utility macros */
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-#define SKIP_TO_NEXT_CPU(reg_entry)					\
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-({									\
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-	while (be64_to_cpu(reg_entry->reg_id) != REG_ID("CPUEND"))	\
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-		reg_entry++;						\
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-	reg_entry++;							\
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-})
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-
7914 extern int crashing_cpu;
8015 
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-/* Kernel Dump section info */
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-struct fadump_section {
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-	__be32	request_flag;
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-	__be16	source_data_type;
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-	__be16	error_flags;
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-	__be64	source_address;
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-	__be64	source_len;
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-	__be64	bytes_dumped;
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-	__be64	destination_address;
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-};
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-
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-/* ibm,configure-kernel-dump header. */
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-struct fadump_section_header {
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-	__be32	dump_format_version;
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-	__be16	dump_num_sections;
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-	__be16	dump_status_flag;
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-	__be32	offset_first_dump_section;
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-
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-	/* Fields for disk dump option. */
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-	__be32	dd_block_size;
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-	__be64	dd_block_offset;
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-	__be64	dd_num_blocks;
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-	__be32	dd_offset_disk_path;
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-
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-	/* Maximum time allowed to prevent an automatic dump-reboot. */
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-	__be32	max_time_auto;
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-};
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-
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-/*
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- * Firmware Assisted dump memory structure. This structure is required for
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- * registering future kernel dump with power firmware through rtas call.
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- *
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- * No disk dump option. Hence disk dump path string section is not included.
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- */
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-struct fadump_mem_struct {
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-	struct fadump_section_header	header;
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-
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-	/* Kernel dump sections */
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-	struct fadump_section		cpu_state_data;
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-	struct fadump_section		hpte_region;
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-	struct fadump_section		rmr_region;
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-};
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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	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	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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-
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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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-
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-	int		ibm_configure_kernel_dump;
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-
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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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-};
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-
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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 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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-
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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 STR_TO_HEX(x)	str_to_u64(x)
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-#define REG_ID(x)	str_to_u64(x)
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-
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-#define FADUMP_CRASH_INFO_MAGIC		STR_TO_HEX("FADMPINF")
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-#define REGSAVE_AREA_MAGIC		STR_TO_HEX("REGSAVE")
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-
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-/* The firmware-assisted dump format.
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- *
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- * The register save area is an area in the partition's memory used to preserve
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- * the register contents (CPU state data) for the active CPUs during a firmware
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- * assisted dump. The dump format contains register save area header followed
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- * by register entries. Each list of registers for a CPU starts with
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- * "CPUSTRT" and ends with "CPUEND".
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- */
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-
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-/* Register save area header. */
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-struct fadump_reg_save_area_header {
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-	__be64		magic_number;
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-	__be32		version;
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-	__be32		num_cpu_offset;
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-};
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-
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-/* Register entry. */
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-struct fadump_reg_entry {
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-	__be64		reg_id;
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-	__be64		reg_value;
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-};
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-
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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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-
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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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-
20316 extern int is_fadump_memory_area(u64 addr, ulong size);
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-extern int early_init_dt_scan_fw_dump(unsigned long node,
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-		const char *uname, int depth, void *data);
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-extern int fadump_reserve_mem(void);
20717 extern int setup_fadump(void);
20818 extern int is_fadump_active(void);
20919 extern int should_fadump_crash(void);
....@@ -214,5 +24,12 @@
21424 static inline int is_fadump_active(void) { return 0; }
21525 static inline int should_fadump_crash(void) { return 0; }
21626 static inline void crash_fadump(struct pt_regs *regs, const char *str) { }
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+static inline void fadump_cleanup(void) { }
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+#endif /* !CONFIG_FA_DUMP */
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+
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+#if defined(CONFIG_FA_DUMP) || defined(CONFIG_PRESERVE_FA_DUMP)
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+extern int early_init_dt_scan_fw_dump(unsigned long node, const char *uname,
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+				      int depth, void *data);
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+extern int fadump_reserve_mem(void);
21734 #endif
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-#endif
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+#endif /* _ASM_POWERPC_FADUMP_H */