From: Peter Oberparleiter <oberpar@linux.ibm.com>
To: Vineeth Vijayan <vneethv@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
linux-s390@vger.kernel.org,
Peter Oberparleiter <oberpar@linux.ibm.com>
Subject: [PATCH] s390/cmf: Fix virtual vs physical address confusion
Date: Fri, 18 Sep 2026 18:12:07 +0200 [thread overview]
Message-ID: <20260918161207.1756809-1-oberpar@linux.ibm.com> (raw)
The measurement block address is an absolute address; therefore add a
missing virt_to_phys() 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.
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
---
drivers/s390/cio/cmf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c
index 92ab3d546fe4..5f57a12762d2 100644
--- a/drivers/s390/cio/cmf.c
+++ b/drivers/s390/cio/cmf.c
@@ -183,7 +183,7 @@ static int set_schib(struct ccw_device *cdev, u32 mme, int mbfc,
sch->config.mbfc = mbfc;
/* address can be either a block address or a block index */
if (mbfc)
- sch->config.mba = address;
+ sch->config.mba = address ? virt_to_phys((void *)address) : 0;
else
sch->config.mbi = address;
--
2.53.0
next reply other threads:[~2026-09-18 16:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-18 16:12 Peter Oberparleiter [this message]
2026-09-18 16:20 ` [PATCH] s390/cmf: Fix virtual vs physical address confusion sashiko-bot
2026-09-20 16:15 ` Heiko Carstens
2026-09-21 10:58 ` Peter Oberparleiter
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