diff options
Diffstat (limited to 'arch/s390/kvm/priv.c')
| -rw-r--r-- | arch/s390/kvm/priv.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 3605df45dd4..4b88834b8dd 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -304,12 +304,24 @@ static intercept_handler_t priv_handlers[256] = { [0xb1] = handle_stfl, }; -int kvm_s390_handle_priv(struct kvm_vcpu *vcpu) +int kvm_s390_handle_b2(struct kvm_vcpu *vcpu) { intercept_handler_t handler; + /* + * a lot of B2 instructions are priviledged. We first check for + * the priviledges ones, that we can handle in the kernel. If the + * kernel can handle this instruction, we check for the problem + * state bit and (a) handle the instruction or (b) send a code 2 + * program check. + * Anything else goes to userspace.*/ handler = priv_handlers[vcpu->arch.sie_block->ipa & 0x00ff]; - if (handler) - return handler(vcpu); + if (handler) { + if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) + return kvm_s390_inject_program_int(vcpu, + PGM_PRIVILEGED_OPERATION); + else + return handler(vcpu); + } return -ENOTSUPP; } |