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-rw-r--r--arch/s390/kvm/priv.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 3605df45dd41..4b88834b8dd8 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;
}