KVM: s390: provide prog irq ilc on SIE faults

On SIE faults, the ilc cannot be detected automatically, as the icptcode
is 0. The ilc indicated in the program irq will always be 0. Therefore we
have to manually specify the ilc in order to tell the guest which ilen was
used when forwarding the PSW.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index aa51a8d5179f185b6d1bfa929916af276814ca2d..12cec63eda276734bb936e46f693ce2001861930 100644 (file)
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2163,7 +2163,10 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu)
 
 static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
 {
-       u8 opcode;
+       struct kvm_s390_pgm_info pgm_info = {
+               .code = PGM_ADDRESSING,
+       };
+       u8 opcode, ilen;
        int rc;
 
        VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction");
@@ -2180,9 +2183,10 @@ static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu)
        rc = read_guest_instr(vcpu, &opcode, 1);
        if (rc)
                return kvm_s390_inject_prog_cond(vcpu, rc);
-       kvm_s390_forward_psw(vcpu, insn_length(opcode));
-
-       return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+       ilen = insn_length(opcode);
+       pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID;
+       kvm_s390_forward_psw(vcpu, ilen);
+       return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
 }
 
 static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)