KVM: s390: Use guest address to mark guest page dirty

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Stop using the userspace address to mark the guest page dirty.
mark_page_dirty() expects a guest frame number, but was being passed a
host virtual frame number. When slot == NULL, mark_page_dirty_in_slot()
does nothing and does not complain.

This means that in some circumstances the dirtiness of the guest page
might have been lost.

Fix by adding two fields in struct kvm_s390_adapter_int to keep the
guest addressses, and use those for mark_page_dirty().

Fixes: f65470661f ("KVM: s390/interrupt: do not pin adapter interrupt pages")
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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This commit is contained in:

Claudio Imbrenda 2026-02-06 15:35:51 +01:00

parent f7ab71f178

commit 898885477e

2 changed files with 6 additions and 2 deletions

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6

arch/s390/kvm/interrupt.c

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2

include/linux/kvm_host.h

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