s390: report spectre mitigation via syslog

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Add a boot message if either of the spectre defenses is active.
The message is
    "Spectre V2 mitigation: execute trampolines."
or  "Spectre V2 mitigation: limited branch prediction."

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Martin Schwidefsky 2018-03-20 16:33:43 +01:00

parent 6e179d6412

commit bc03559971

1 changed files with 10 additions and 0 deletions

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arch/s390/kernel/nospec-branch.c

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