KVM: s390: fix stsi exception handling
In case of an exception the guest psw condition code should be left alone.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-By: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 23a8370..de1b1b6 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -343,8 +343,8 @@
int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
+ unsigned long mem = 0;
u64 operand2;
- unsigned long mem;
int rc = 0;
vcpu->stat.instruction_stsi++;
@@ -364,36 +364,36 @@
case 2:
mem = get_zeroed_page(GFP_KERNEL);
if (!mem)
- goto out_fail;
+ goto out_no_data;
if (stsi((void *) mem, fc, sel1, sel2))
- goto out_mem;
+ goto out_no_data;
break;
case 3:
if (sel1 != 2 || sel2 != 2)
- goto out_fail;
+ goto out_no_data;
mem = get_zeroed_page(GFP_KERNEL);
if (!mem)
- goto out_fail;
+ goto out_no_data;
handle_stsi_3_2_2(vcpu, (void *) mem);
break;
default:
- goto out_fail;
+ goto out_no_data;
}
if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
- goto out_mem;
+ goto out_exception;
}
trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
free_page(mem);
vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
vcpu->run->s.regs.gprs[0] = 0;
return 0;
-out_mem:
- free_page(mem);
-out_fail:
+out_no_data:
/* condition code 3 */
vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
+out_exception:
+ free_page(mem);
return rc;
}