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(parent: b2e2f43) | patch
s390: add automatic detection of the spectre defense
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Fri, 23 Mar 2018 12:04:49 +0000 (13:04 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Wed, 28 Mar 2018 06:38:24 +0000 (08:38 +0200)
commit6e179d64126b909f0b288fa63cdbf07c531e9b1d
treed3b27e05dca18c669c42ba1b7833179c1b83a273tree
parentb2e2f43a01bace1a25bdbae04c9f9846882b727acommit | diff
s390: add automatic detection of the spectre defense

Automatically decide between nobp vs. expolines if the spectre_v2=auto
kernel parameter is specified or CONFIG_EXPOLINE_AUTO=y is set.

The decision made at boot time due to CONFIG_EXPOLINE_AUTO=y being set
can be overruled with the nobp, nospec and spectre_v2 kernel parameters.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/Kconfig diff | blob | blame | history
arch/s390/Makefile diff | blob | blame | history
arch/s390/include/asm/nospec-branch.h diff | blob | blame | history
arch/s390/kernel/alternative.c diff | blob | blame | history
arch/s390/kernel/module.c diff | blob | blame | history
arch/s390/kernel/nospec-branch.c diff | blob | blame | history
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