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KVM: s390: split SIE state guest prefix field

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This patch splits the SIE state guest prefix at offset 4
into a prefix bit field. Additionally it provides the
access functions:

 - kvm_s390_get_prefix()
 - kvm_s390_set_prefix()

to access the prefix per vcpu.

Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Michael Mueller
2014-05-13 16:58:30 +02:00
committed by Christian Borntraeger
parent 570126d370
commit fda902cb83
6 changed files with 22 additions and 13 deletions
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3
arch/s390/kvm/priv.c
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@@ -119,8 +119,7 @@ static int handle_store_prefix(struct kvm_vcpu *vcpu)
if (operand2 & 3)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
address = vcpu->arch.sie_block->prefix;
address = address & 0x7fffe000u;
address = kvm_s390_get_prefix(vcpu);
/* get the value */
rc = write_guest(vcpu, operand2, &address, sizeof(address));