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Tue, 3 Aug 2021 08:26:48 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0516BA405D; Tue, 3 Aug 2021 08:26:48 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.75.95]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 3 Aug 2021 08:26:47 +0000 (GMT) From: Pierre Morel To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, borntraeger@de.ibm.com, frankja@linux.ibm.com, cohuck@redhat.com, david@redhat.com, thuth@redhat.com, imbrenda@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, pmorel@linux.ibm.com Subject: [PATCH v3 1/3] s390x: KVM: accept STSI for CPU topology information Date: Tue, 3 Aug 2021 10:26:44 +0200 Message-Id: <1627979206-32663-2-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1627979206-32663-1-git-send-email-pmorel@linux.ibm.com> References: <1627979206-32663-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: yr6EgA-hxe1ozPlaPLt9WzVgf3a33Y7b X-Proofpoint-GUID: 1VN58dVkjlKTnda4kFo9g-UJ5gMuN3d5 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-08-03_02:2021-08-03,2021-08-03 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 impostorscore=0 spamscore=0 mlxscore=0 phishscore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 adultscore=0 clxscore=1015 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108030055 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org STSI(15.1.x) gives information on the CPU configuration topology. Let's accept the interception of STSI with the function code 15 and let the userland part of the hypervisor handle it when userland support the CPU Topology facility. Signed-off-by: Pierre Morel --- arch/s390/kvm/priv.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 9928f785c677..8581b6881212 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -856,7 +856,8 @@ static int handle_stsi(struct kvm_vcpu *vcpu) if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); - if (fc > 3) { + if ((fc > 3 && fc != 15) || + (fc == 15 && !test_kvm_facility(vcpu->kvm, 11))) { kvm_s390_set_psw_cc(vcpu, 3); return 0; } @@ -893,6 +894,10 @@ static int handle_stsi(struct kvm_vcpu *vcpu) goto out_no_data; handle_stsi_3_2_2(vcpu, (void *) mem); break; + case 15: + trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2); + insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2); + return -EREMOTE; } if (kvm_s390_pv_cpu_is_protected(vcpu)) { memcpy((void *)sida_origin(vcpu->arch.sie_block), (void *)mem, -- 2.25.1