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Tue, 10 Oct 2023 11:02:17 +0000 (GMT) Message-ID: Date: Tue, 10 Oct 2023 13:02:17 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [PATCH v2 1/2] target/s390x/kvm: Turn KVM_CAP_SYNC_REGS into a hard requirement Content-Language: en-US To: Thomas Huth , qemu-devel@nongnu.org, Halil Pasic Cc: qemu-s390x@nongnu.org, David Hildenbrand , =?UTF-8?Q?C=c3=a9dric_Le_Goater?= References: <20231009170745.63446-1-thuth@redhat.com> <20231009170745.63446-2-thuth@redhat.com> From: Christian Borntraeger In-Reply-To: <20231009170745.63446-2-thuth@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: TE8Wg-jKdc69ZAeotRnBxgAsVtGap0YB X-Proofpoint-GUID: shABGvty1ZcjdANw6y23t12uKKGIzOF0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-10_06,2023-10-10_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 mlxlogscore=999 bulkscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 adultscore=0 clxscore=1011 mlxscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310100080 Received-SPF: pass client-ip=148.163.158.5; envelope-from=borntraeger@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -52 X-Spam_score: -5.3 X-Spam_bar: ----- X-Spam_report: (-5.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-3.339, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Am 09.10.23 um 19:07 schrieb Thomas Huth: > Since we already require at least kernel 3.15 in the s390x KVM code, > we can assume that the KVM_CAP_SYNC_REGS capability is always there. > Thus turn this into a hard requirement now. > > Signed-off-by: Thomas Huth > --- > target/s390x/kvm/kvm.c | 20 ++++++++++++++------ > 1 file changed, 14 insertions(+), 6 deletions(-) > > diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c > index bc5c56a305..b3e2eaa2eb 100644 > --- a/target/s390x/kvm/kvm.c > +++ b/target/s390x/kvm/kvm.c > @@ -337,21 +337,29 @@ int kvm_arch_get_default_type(MachineState *ms) > > int kvm_arch_init(MachineState *ms, KVMState *s) > { > + int required_caps[] = { > + KVM_CAP_DEVICE_CTRL, > + KVM_CAP_SYNC_REGS, > + }; > + > + for (int i = 0; i < ARRAY_SIZE(required_caps); i++) { > + if (!kvm_check_extension(s, required_caps[i])) { > + error_report("KVM is missing capability #%d - " > + "please use kernel 3.15 or newer", required_caps[i]); > + return -1; > + } > + } > + > object_class_foreach(ccw_machine_class_foreach, TYPE_S390_CCW_MACHINE, > false, NULL); > > - if (!kvm_check_extension(kvm_state, KVM_CAP_DEVICE_CTRL)) { > - error_report("KVM is missing capability KVM_CAP_DEVICE_CTRL - " > - "please use kernel 3.15 or newer"); > - return -1; > - } > if (!kvm_check_extension(s, KVM_CAP_S390_COW)) { > error_report("KVM is missing capability KVM_CAP_S390_COW - " > "unsupported environment"); > return -1; > } Not sure if we also want to move KVM_CAP_S390_COW somehow. The message would be different. Aparch from that: Reviewed-by: Christian Borntraeger > > - cap_sync_regs = kvm_check_extension(s, KVM_CAP_SYNC_REGS); > + cap_sync_regs = true; > cap_async_pf = kvm_check_extension(s, KVM_CAP_ASYNC_PF); > cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP); > cap_mem_op_extension = kvm_check_extension(s, KVM_CAP_S390_MEM_OP_EXTENSION);