s390/uv: Provide host-key hashes in sysfs

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Utilize the new Query Ultravisor Keys UVC to give user space the
information which host-keys are installed on the system.

Create a new sysfs directory 'firmware/uv/keys' that contains the hash
of the host-key and the backup host-key of that system. Additionally,
the file 'all' contains the response from the UVC possibly containing
more key-hashes than currently known.

Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Link: https://lore.kernel.org/r/20241023075529.2561384-1-seiden@linux.ibm.com
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

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Steffen Eiden 2024-10-23 09:55:28 +02:00 • committed by Heiko Carstens

parent bb4ad73a28

commit 28a51ee8eb

2 changed files with 88 additions and 0 deletions

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17

arch/s390/include/asm/uv.h

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71

arch/s390/kernel/uv.c

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