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KVM: s390: fix return code handling in lpsw/lpswe handlers 

kvm_s390_inject_program_int() may return with a non-zero return value, in
case of an error (out of memory). Report that to the calling functions
instead of ignoring the error case.

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>
This commit is contained in:
Heiko Carstens 2013-03-25 17:22:51 +01:00 коммит произвёл Gleb Natapov
Родитель ace5058763
Коммит 6fd0fcc93b
1 изменённых файлов: 14 добавлений и 30 удалений
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44
arch/s390/kvm/priv.c
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@ -269,20 +269,14 @@ int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
addr = kvm_s390_get_base_disp_s(vcpu);
if (addr & 7) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
goto out;
}
if (addr & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw))) {
kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
goto out;
}
if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
if (!(new_psw.mask & PSW32_MASK_BASE)) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
goto out;
}
if (!(new_psw.mask & PSW32_MASK_BASE))
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
vcpu->arch.sie_block->gpsw.mask =
(new_psw.mask & ~PSW32_MASK_BASE) << 32;
@ -293,13 +287,10 @@ int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
(!(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) &&
(vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_24)) ||
((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) ==
PSW_MASK_EA)) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
goto out;
}
PSW_MASK_EA))
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
handle_new_psw(vcpu);
out:
return 0;
}
@ -310,15 +301,11 @@ static int handle_lpswe(struct kvm_vcpu *vcpu)
addr = kvm_s390_get_base_disp_s(vcpu);
if (addr & 7) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
goto out;
}
if (addr & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw))) {
kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
goto out;
}
if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
vcpu->arch.sie_block->gpsw.mask = new_psw.mask;
vcpu->arch.sie_block->gpsw.addr = new_psw.addr;
@ -330,13 +317,10 @@ static int handle_lpswe(struct kvm_vcpu *vcpu)
(!(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) &&
(vcpu->arch.sie_block->gpsw.addr & ~PSW_ADDR_24)) ||
((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_ADDR_MODE) ==
PSW_MASK_EA)) {
kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
goto out;
}
PSW_MASK_EA))
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
handle_new_psw(vcpu);
out:
return 0;
}