KVM: s390: protvirt: Secure memory is not mergeable

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KSM will not work on secure pages, because when the kernel reads a
secure page, it will be encrypted and hence no two pages will look the
same.

Let's mark the guest pages as unmergeable when we transition to secure
mode.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-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>

...

This commit is contained in:

Janosch Frank 2019-07-16 13:08:37 +02:00 • committed by Christian Borntraeger

parent 29b40f105e

commit fa0c5eabbd

3 changed files with 27 additions and 10 deletions

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1

arch/s390/include/asm/gmap.h

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6

arch/s390/kvm/kvm-s390.c

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30

arch/s390/mm/gmap.c

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