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55a5542a54
linux-next/drivers/s390/char
History
Gerald Schaefer 55a5542a54 s390/hibernate: fix error handling when suspend cpu != resume cpu 
The resume code checks if the resume cpu is the same as the suspend cpu.
If not, and if it is also not possible to switch to the suspend cpu, an
error message should be printed and the resume process should be stopped
by loading a disabled wait psw.

The current logic is broken in multiple ways, the message is never printed,
and the disabled wait psw never loaded because the kernel panics before that:
- sam31 and SIGP_SET_ARCHITECTURE to ESA mode is wrong, this will break
  on the first 64bit instruction in sclp_early_printk().
- The init stack should be used, but the stack pointer is not set up correctly
  (missing aghi %r15,-STACK_FRAME_OVERHEAD).
- __sclp_early_printk() checks the sclp_init_state. If it is not
  sclp_init_state_uninitialized, it simply returns w/o printing anything.
  In the resumed kernel however, sclp_init_state will never be uninitialized.

This patch fixes those issues by removing the sam31/ESA logic, adding a
correct init stack pointer, and also introducing sclp_early_printk_force()
to allow using sclp_early_printk() even when sclp_init_state is not
uninitialized.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-09-20 13:20:23 +02:00
..
con3215.c s390/sclp: Convert timers to use timer_setup() 2017-11-14 11:01:39 +01:00
con3270.c s390/sclp: Convert timers to use timer_setup() 2017-11-14 11:01:39 +01:00
ctrlchar.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ctrlchar.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
defkeymap.c s390/defkeymap: fix global init to zero 2018-03-18 23:02:02 -07:00
defkeymap.map s390: add a few more SPDX identifiers 2017-12-05 07:51:09 +01:00
diag_ftp.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
diag_ftp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fs3270.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
hmcdrv_cache.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hmcdrv_cache.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hmcdrv_dev.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hmcdrv_dev.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hmcdrv_ftp.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hmcdrv_ftp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hmcdrv_mod.c s390: char: add SPDX identifiers to the remaining files 2017-11-24 14:28:42 +01:00
Kconfig s390: add a few more SPDX identifiers 2017-12-05 07:51:09 +01:00
keyboard.c TTY/Serial driver patches for 4.19-rc1 2018-08-18 10:50:41 -07:00
keyboard.h s390/char : Rename EBCDIC keymap variables 2018-03-18 23:01:56 -07:00
Makefile s390/decompressor: avoid reusing uncompressed image objects 2018-06-25 10:14:39 +02:00
monreader.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
monwriter.c s390/monwriter: fix gcc 8 stringop-truncation warning 2018-07-02 11:25:03 +02:00
raw3270.c s390: char: add SPDX identifiers to the remaining files 2017-11-24 14:28:42 +01:00
raw3270.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_async.c s390/sclp_async: replace callhome proc handler with generic one 2018-07-06 08:47:53 +02:00
sclp_cmd.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_con.c s390/sclp: Convert timers to use timer_setup() 2017-11-14 11:01:39 +01:00
sclp_config.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_cpi_sys.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_cpi_sys.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_ctl.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
sclp_diag.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_early_core.c s390/hibernate: fix error handling when suspend cpu != resume cpu 2018-09-20 13:20:23 +02:00
sclp_early.c s390/sclp: generic event mask accessors 2018-02-22 15:31:24 +01:00
sclp_ftp.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_ftp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_ocf.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_pci.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_quiesce.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_rw.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_rw.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_sd.c treewide: Use array_size() in vzalloc() 2018-06-12 16:19:22 -07:00
sclp_sdias.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_sdias.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_tty.c s390/sclp_tty: enable line mode tty even if there is an ascii console 2018-03-18 23:02:00 -07:00
sclp_tty.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sclp_vt220.c s390/sclp: Convert timers to use timer_setup() 2017-11-14 11:01:39 +01:00
sclp.c s390/sclp: 32 bit event mask compatibility mode 2018-02-22 15:31:24 +01:00
sclp.h s390/sclp: 64 bit event mask 2018-02-22 15:31:24 +01:00
tape_34xx.c s390: char: add SPDX identifiers to the remaining files 2017-11-24 14:28:42 +01:00
tape_3590.c s390/tape: fix gcc 8 stringop-truncation warning 2018-07-02 11:25:03 +02:00
tape_3590.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tape_char.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tape_class.c s390/tape: replace PTR_RET with PTR_ERR_OR_ZERO 2018-07-19 16:37:37 +02:00
tape_class.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tape_core.c s390: char: add SPDX identifiers to the remaining files 2017-11-24 14:28:42 +01:00
tape_proc.c proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
tape_std.c Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
tape_std.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tape.h Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
tty3270.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
tty3270.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vmcp.c mm/cma: remove unsupported gfp_mask parameter from cma_alloc() 2018-08-17 16:20:32 -07:00
vmlogrdr.c s390: char: add SPDX identifiers to the remaining files 2017-11-24 14:28:42 +01:00
vmur.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
vmur.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2017-11-13 11:47:01 -08:00
zcore.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00