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KVM: s390: Decoding helper functions.

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Introduce helper functions for decoding the various base/displacement
instruction formats.

Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Cornelia Huck
2012-12-20 15:32:07 +01:00
committed by Marcelo Tosatti
parent 7797535795
commit b1c571a50d
4 changed files with 55 additions and 51 deletions
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6
arch/s390/kvm/sigp.c
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@@ -324,8 +324,6 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
{
int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
int r3 = vcpu->arch.sie_block->ipa & 0x000f;
int base2 = vcpu->arch.sie_block->ipb >> 28;
int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
u32 parameter;
u16 cpu_addr = vcpu->run->s.regs.gprs[r3];
u8 order_code;
@@ -336,9 +334,7 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
return kvm_s390_inject_program_int(vcpu,
PGM_PRIVILEGED_OPERATION);
order_code = disp2;
if (base2)
order_code += vcpu->run->s.regs.gprs[base2];
order_code = kvm_s390_get_base_disp_rs(vcpu);
if (r1 % 2)
parameter = vcpu->run->s.regs.gprs[r1];