s390/protvirt: add ultravisor initialization

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Before being able to host protected virtual machines, donate some of
the memory to the ultravisor. Besides that the ultravisor might impose
addressing limitations for memory used to back protected VM storage. Treat
that limit as protected virtualization host's virtual memory limit.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

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Vasily Gorbik 2019-10-23 13:56:39 +02:00 • committed by Christian Borntraeger

parent ecdc5d842b

commit 29d37e5b82

3 changed files with 68 additions and 0 deletions

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15

arch/s390/include/asm/uv.h

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5

arch/s390/kernel/setup.c

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48

arch/s390/kernel/uv.c

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