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| author |   David Hildenbrand <dahi@linux.vnet.ibm.com> | 2016-06-21 14:19:51 +0200 |
|---|---|---|
| committer |   Christian Borntraeger <borntraeger@de.ibm.com> | 2016-07-18 14:15:00 +0200 |
| commit | 6502a34cfd6695929086187f63fe670cc3050e68 (patch) | |
| tree | 774e386aac358c15baeeba02a38bb8b080e3887d /arch/s390/kvm/intercept.c | |
| parent | KVM: x86: bump KVM_MAX_VCPU_ID to 1023 (diff) | |
| download | linux-dev-6502a34cfd6695929086187f63fe670cc3050e68.tar.xz linux-dev-6502a34cfd6695929086187f63fe670cc3050e68.zip | |
KVM: s390: allow user space to handle instr 0x0000
We will use illegal instruction 0x0000 for handling 2 byte sw breakpoints
from user space. As it can be enabled dynamically via a capability,
let's move setting of ICTL_OPEREXC to the post creation step, so we avoid
any races when enabling that capability just while adding new cpus.
Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/intercept.c')
| -rw-r--r-- | arch/s390/kvm/intercept.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 850be47c4cc9..7a2f1551bc39 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -359,6 +359,9 @@ static int handle_operexc(struct kvm_vcpu *vcpu) test_kvm_facility(vcpu->kvm, 74)) return handle_sthyi(vcpu); + if (vcpu->arch.sie_block->ipa == 0 && vcpu->kvm->arch.user_instr0) + return -EOPNOTSUPP; + return kvm_s390_inject_program_int(vcpu, PGM_OPERATION); } |