KVM: s390: Add a function for checking the low-address protection

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The s390 architecture has a special protection mechanism that can
be used to prevent write access to the vital data in the low-core
memory area. This patch adds a new helper function that can be used
to check for such write accesses and in case of protection, it also
sets up the exception data accordingly.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

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Thomas Huth 2014-03-03 23:34:42 +01:00 • committed by Christian Borntraeger

parent 9a558ee3cc

commit f8232c8cf7

2 changed files with 29 additions and 0 deletions

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28

arch/s390/kvm/gaccess.c

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1

arch/s390/kvm/gaccess.h

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