KVM: s390/mm: handle guest unpin events

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The current code tries to first pin shared pages, if that fails (e.g.
because the page is not shared) it will export them. For shared pages
this means that we get a new intercept telling us that the guest is
unsharing that page. We will unpin the page at that point in time,
following the same rules as for making a page secure (i.e. waiting for
writeback, no elevated page references, etc.)

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

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Claudio Imbrenda 2020-01-31 15:00:39 -05:00 • committed by Christian Borntraeger

parent d274995ec2

commit 5322781008

1 changed files with 29 additions and 0 deletions

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arch/s390/kvm/intercept.c

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