KVM: s390: Fix low-address protection for real addresses

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The kvm_s390_check_low_addr_protection() function is used only with real
addresses. According to the POP (the "Low-Address Protection"
paragraph in chapter 3), if the effective address is real or absolute,
the low-address protection procedure should raise a PROTECTION exception
only when the low-address protection is enabled in the control register
0 and the address is low.
This patch removes ASCE checks from the function and renames it to
better reflect its behavior.

Cc: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

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This commit is contained in:

Alexander Yarygin 2015-03-03 14:26:14 +03:00 • committed by Christian Borntraeger

parent 40f5b735e8

commit dd9e5b7bdb

3 changed files with 9 additions and 8 deletions

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11

arch/s390/kvm/gaccess.c

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2

arch/s390/kvm/gaccess.h

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4

arch/s390/kvm/priv.c

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