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KVM: s390: Add helper function for setting condition code

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Introduced a helper function for setting the CC in the
guest PSW to improve the readability of the code.

Signed-off-by: Thomas Huth <thuth@linux.vnet.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
2013-07-26 15:04:06 +02:00
committed by Paolo Bonzini
parent 843200e7cc
commit ea828ebf59
2 changed files with 13 additions and 9 deletions
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15
arch/s390/kvm/priv.c
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@@ -163,8 +163,7 @@ static int handle_tpi(struct kvm_vcpu *vcpu)
kfree(inti);
no_interrupt:
/* Set condition code and we're done. */
vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
vcpu->arch.sie_block->gpsw.mask |= (cc & 3ul) << 44;
kvm_s390_set_psw_cc(vcpu, cc);
return 0;
}
@@ -219,8 +218,7 @@ static int handle_io_inst(struct kvm_vcpu *vcpu)
* Set condition code 3 to stop the guest from issueing channel
* I/O instructions.
*/
vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
vcpu->arch.sie_block->gpsw.mask |= (3 & 3ul) << 44;
kvm_s390_set_psw_cc(vcpu, 3);
return 0;
}
}
@@ -383,7 +381,7 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
if (fc > 3) {
vcpu->arch.sie_block->gpsw.mask |= 3ul << 44; /* cc 3 */
kvm_s390_set_psw_cc(vcpu, 3);
return 0;
}
@@ -393,7 +391,7 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
if (fc == 0) {
vcpu->run->s.regs.gprs[0] = 3 << 28;
vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44); /* cc 0 */
kvm_s390_set_psw_cc(vcpu, 0);
return 0;
}
@@ -427,12 +425,11 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
}
trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
free_page(mem);
vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
kvm_s390_set_psw_cc(vcpu, 0);
vcpu->run->s.regs.gprs[0] = 0;
return 0;
out_no_data:
/* condition code 3 */
vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
kvm_s390_set_psw_cc(vcpu, 3);
out_exception:
free_page(mem);
return rc;