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/*
* s390 related definitions and functions.
*
* Copyright IBM Corp. 2013, 2023
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef S390_DUMP_H
#define S390_DUMP_H
#include <stdint.h>
#include "boot/page.h"
#include "lib/zt_common.h"
/*
* S390 dump format defines
*/
#define DF_S390_MAGIC 0xa8190173618f23fdULL
#define DF_S390_MAGIC_EXT 0xa8190173618f23feULL
#define DF_S390_HDR_SIZE 0x1000
#define DF_S390_EM_SIZE 16
#define DF_S390_EM_MAGIC 0x44554d505f454e44ULL
#define DF_S390_EM_STR "DUMP_END"
#define DF_S390_CPU_MAX 512
#define DF_S390_MAGIC_BLK_ECKD 3
#define DF_S390_DUMPER_MAGIC_SIZE 7
#define DF_S390_DUMPER_MAGIC_EXT "XECKD64"
#define DF_S390_DUMPER_MAGIC_FBA_EXT "XDFBA64"
#define DF_S390_DUMPER_MAGIC_MV_EXT "XMULT64"
/*
* Architecture of dumped system
*/
enum df_s390_arch {
DF_S390_ARCH_32 = 1,
DF_S390_ARCH_64 = 2,
};
/*
* zipl parameters passed at tail of dump tools
*/
struct stage2dump_parm_tail {
char reserved[6];
uint8_t no_compress;
uint8_t mvdump_force;
uint64_t mem_upper_limit;
} __packed;
/*
* s390 dump header format
*/
struct df_s390_hdr {
uint64_t magic; /* 0x000 */
uint32_t version; /* 0x008 */
uint32_t hdr_size; /* 0x00c */
uint32_t dump_level; /* 0x010 */
uint32_t page_size; /* 0x014 */
uint64_t mem_size; /* 0x018 */
uint64_t mem_start; /* 0x020 */
uint64_t mem_end; /* 0x028 */
uint32_t num_pages; /* 0x030 */
uint32_t pad; /* 0x034 */
uint64_t tod; /* 0x038 */
uint64_t cpu_id; /* 0x040 */
uint32_t arch; /* 0x048 */
uint32_t volnr; /* 0x04c */
uint32_t build_arch; /* 0x050 */
uint64_t mem_size_real; /* 0x054 */
uint8_t mvdump; /* 0x05c */
uint16_t cpu_cnt; /* 0x05d */
uint16_t real_cpu_cnt; /* 0x05f */
uint8_t zlib_version_s390; /* 0x061 */
uint32_t zlib_entry_size; /* 0x062 */
uint8_t end_pad1[0x200 - 0x066]; /* 0x066 */
uint64_t mvdump_sign; /* 0x200 */
uint64_t mvdump_zipl_time; /* 0x208 */
uint8_t end_pad2[0x800 - 0x210]; /* 0x210 */
uint32_t lc_vec[DF_S390_CPU_MAX]; /* 0x800 */
} __packed __aligned(16);
/*
* End marker: Should be at the end of every valid s390 crash dump
*/
struct df_s390_em {
union {
uint64_t magic;
char str[8];
};
uint64_t tod;
} __packed __aligned(16);
/*
* Dump segment header
*/
struct df_s390_dump_segm_hdr {
union {
struct {
uint64_t start; /* 0x000 */
uint64_t len; /* 0x008 */
uint64_t stop_marker; /* 0x010 */
/* Size in blocks of compressed dump segment written to disk */
uint32_t size_on_disk; /* 0x018 */
uint8_t reserved_pad[0x30 - 0x1c]; /* 0x01c */
/*
* Number of compressed entries in this dump segment (up to
* 1011 entries)
*/
uint32_t entry_count; /* 0x030 */
/*
* Offsets in blocks to compressed entries written to disk
* from the start of the dump segment.
* High-order bit is set if the entry has been written
* uncompressed.
*/
uint32_t entry_offset[]; /* 0x034 */
} __packed;
uint8_t padding[PAGE_SIZE];
};
};
/* Data compression granularity (size of input data chunk for zlib deflate) */
#define DUMP_SEGM_ZLIB_ENTSIZE (1 * MIB)
/* Maximum number of compressed entries in one dump segment */
#define DUMP_SEGM_ZLIB_MAXENTS ((sizeof(struct df_s390_dump_segm_hdr) \
- offsetof(struct df_s390_dump_segm_hdr, entry_offset)) \
/ sizeof(uint32_t))
/*
* Maximum length of compressed dump segment considering the size of
* a single input chunk
*/
#define DUMP_SEGM_ZLIB_MAXLEN (DUMP_SEGM_ZLIB_MAXENTS * DUMP_SEGM_ZLIB_ENTSIZE)
/* Bitmask to mark uncompressed chunks */
#define DUMP_SEGM_ENTRY_UNCOMPRESSED 0x80000000
#endif /* S390_DUMP_H */
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