s390/cmf: Fix virtual vs physical address confusion

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The measurement block address is an absolute address. Define the
associated schib_config and schib fields as dma64_t to enable automatic
detection of incorrect assignments. Also add the missing virt_to_dma64()
translation.

Without this fix, a wrong address will be used by firmware when storing
extended format channel measurement data on kernels built with
CONFIG_RANDOMIZE_IDENTITY_BASE=y.

Fixes: 14edd0d73b ("s390/cmf: fix virtual vs physical address confusion")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

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Peter Oberparleiter 2026-09-21 15:16:48 +02:00 • committed by Heiko Carstens

parent 3a43be7a1f

commit f4d04425e6

2 changed files with 4 additions and 3 deletions

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5

drivers/s390/cio/cio.h

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2

drivers/s390/cio/cmf.c

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