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KVM: s390: Allow NULL parameter for kvm_s390_get_regs_rre 

We're not always interested in both registers that are specified
for an RRE instruction. So allow NULL as parameter, too, to indicate
that we do not need the corresponding value.

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>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Thomas Huth 2013-09-12 10:33:46 +02:00 committed by Paolo Bonzini
parent 800c1065c3
commit ff7158b227
1 changed files with 4 additions and 2 deletions
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6
arch/s390/kvm/kvm-s390.h
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@ -90,8 +90,10 @@ static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
{
*r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
*r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
if (r1)
*r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
if (r2)
*r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
}
static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu)