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zdump: Drop support of obsolete dumps and dumpers

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Drop support of obsolete dump and dump-tool versions (single-volume DASD,
FBA and Tape) in order to simplify zgetdump logic:
- CCW dumpers written in assembler instructions as well as stage2 dumpers
  of size less than 0x3000 (STAGE2_DUMPER_SIZE_V1 or STAGE2_DUMPER_SIZE_V2)
  haven't been used for years. Remove its traces completely as a cleanup.
  Keep the last version (version 5) of non-extended DASD dumper as well as
  newer extended DASD dumpers.
- Rename STAGE2_DUMPER_SIZE_V3 and STAGE2_DUMPER_SIZE_ZLIB constants.
- Drop support of non-extended s390 dumps of version < 5. Dump files
  of s390 format version 5 can be still produced by zgetdump (dfo_s390).
- Drop excessive dump version checking in df_s390_cpu_info_add() and
  df_s390_hdr_add() considering that obsolete s390 dumps of version lower
  than 5 no longer supported.
- Use cpu_cnt field in s390 dump header instead of the s390 dump version to
  indicate no cpu info available (DFI_CPU_CONTENT_NONE) for dfo_s390.
- Make df_s390_dumper_read() return error code upon unknown dumper
  version/magic detection.

Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Mikhail Zaslonko
2024-10-09 18:13:27 +02:00
committed by Jan Höppner
parent 9efd1df31d
commit 2c5d4073a7
9 changed files with 77 additions and 109 deletions
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6
include/boot/loaders_layout.h
View File

@@ -31,11 +31,9 @@
#define ECKD2DUMP_STACK_SIZE _AC(0x2000, UL)
#define STAGE2_MAX_SIZE _AC(0x3000, UL)
#define STAGE2_DUMPER_SIZE_V1 _AC(0x1000, UL)
#define STAGE2_DUMPER_SIZE_V2 _AC(0x2000, UL)
#define STAGE2_DUMPER_SIZE_V3 _AC(0x3000, UL)
#define STAGE2_DUMPER_SIZE_SV _AC(0x3000, UL)
#define STAGE2_DUMPER_SIZE_MV _AC(0x4000, UL)
#define STAGE2_DUMPER_SIZE_ZLIB _AC(0x8000, UL)
#define STAGE2_DUMPER_SIZE_SV_ZLIB _AC(0x8000, UL)
#define STAGE3_ENTRY _AC(0xa000, UL)

4
include/dump/s390_dump.h
View File

@@ -27,16 +27,12 @@
#define DF_S390_CPU_MAX 512
#define DF_S390_MAGIC_BLK_ECKD 3
#define DF_S390_DUMPER_MAGIC_SIZE 7
#define DF_S390_DUMPER_MAGIC32 "ZECKD31"
#define DF_S390_DUMPER_MAGIC64 "ZECKD64"
#define DF_S390_DUMPER_MAGIC_EXT "XECKD64"
#define DF_S390_DUMPER_MAGIC32_FBA "ZDFBA31"
#define DF_S390_DUMPER_MAGIC64_FBA "ZDFBA64"
#define DF_S390_DUMPER_MAGIC_FBA_EXT "XDFBA64"
#define DF_S390_DUMPER_MAGIC_MV "ZMULT64"
#define DF_S390_DUMPER_MAGIC_MV_EXT "XMULT64"
#define OLD_DUMPER_HEX_INSTR1 "\x0d\x10\x47\xf0" /* BASR + 1st halfword of BC */
#define OLD_DUMPER_HEX_INSTR2 "\x0d\xd0" /* BASR 13,0 */
/*
* Architecture of dumped system