diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-03-25 17:22:54 +0100 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-04-02 16:14:41 +0300 |
| commit | c51f068c23c76a86d427260b8219430ee6f99516 (patch) | |
| tree | 6c62f20259c8e9ae1d9e857873558533a98997fe /arch/s390/kvm/priv.c | |
| parent | db4a29cb6ac7b2fda505923bdbc58fc35a719f62 (diff) | |
| download | lwn-c51f068c23c76a86d427260b8219430ee6f99516.tar.gz lwn-c51f068c23c76a86d427260b8219430ee6f99516.zip | |
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>
Diffstat (limited to 'arch/s390/kvm/priv.c')
| -rw-r--r-- | arch/s390/kvm/priv.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 23a8370b1045..de1b1b6128e1 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -343,8 +343,8 @@ static int handle_stsi(struct kvm_vcpu *vcpu) 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 @@ static int handle_stsi(struct kvm_vcpu *vcpu) 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; } |