mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
724dc336b7
Try to print out startup pgm check info including exact linux kernel version, pgm interruption code and ilc, psw and general registers. Like the following: Linux version 5.3.0-rc7-07282-ge7b4d41d61bd-dirty (gor@tuxmaker) #3 SMP PREEMPT Thu Sep 5 16:07:34 CEST 2019 Kernel fault: interruption code 0005 ilc:2 PSW : 0000000180000000 0000000000012e52 R:0 T:0 IO:0 EX:0 Key:0 M:0 W:0 P:0 AS:0 CC:0 PM:0 RI:0 EA:3 GPRS: 0000000000000000 00ffffffffffffff 0000000000000000 0000000000019a58 000000000000bf68 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 000000000001a041 0000000000000000 0000000004c9c000 0000000000010070 0000000000012e42 000000000000beb0 This info makes it apparent that kernel startup failed and might help to understand what went wrong without actual standalone dump. Printing code runs on its own stack of 1 page (at unused 0x5000), which should be sufficient for sclp_early_printk usage (typical stack usage observed has been around 512 bytes). The code has pgm check recursion prevention, despite pgm check info printing failure (follow on pgm check) or success it restores original faulty psw and gprs and does disabled wait. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
21 lines
540 B
C
21 lines
540 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef BOOT_BOOT_H
|
|
#define BOOT_BOOT_H
|
|
|
|
void startup_kernel(void);
|
|
void detect_memory(void);
|
|
void store_ipl_parmblock(void);
|
|
void setup_boot_command_line(void);
|
|
void parse_boot_command_line(void);
|
|
void setup_memory_end(void);
|
|
void print_missing_facilities(void);
|
|
void print_pgm_check_info(void);
|
|
unsigned long get_random_base(unsigned long safe_addr);
|
|
|
|
extern int kaslr_enabled;
|
|
extern const char kernel_version[];
|
|
|
|
unsigned long read_ipl_report(unsigned long safe_offset);
|
|
|
|
#endif /* BOOT_BOOT_H */
|