KVM: s390: fix task size check

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The gmap_map_segment function uses PGDIR_SIZE in the check for the
maximum address in the tasks address space. This incorrectly limits
the amount of memory usable for a kvm guest to 4TB. The correct limit
is (1UL << 53). As the TASK_SIZE has different values (4TB vs 8PB)
dependent on the existance of the fourth page table level, create
a new define 'TASK_MAX_SIZE' for (1UL << 53).

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Martin Schwidefsky 2013-07-26 15:04:03 +02:00 • committed by Paolo Bonzini

parent 3eabaee998

commit ee6ee55bb5

2 changed files with 3 additions and 1 deletions

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arch/s390/include/asm/processor.h

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2

arch/s390/mm/pgtable.c

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