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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 19 Feb 2020 11:06:32 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01JB6Sib46662120 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 19 Feb 2020 11:06:28 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B331411C04A; Wed, 19 Feb 2020 11:06:28 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2F0B911C052; Wed, 19 Feb 2020 11:06:28 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.145.166.21]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 19 Feb 2020 11:06:28 +0000 (GMT) Subject: Re: [PATCH v2 32/42] KVM: s390: protvirt: Support cmd 5 operation state To: David Hildenbrand , Janosch Frank Cc: KVM , Cornelia Huck , Thomas Huth , Ulrich Weigand , Claudio Imbrenda , linux-s390 , Michael Mueller , Vasily Gorbik , Janosch Frank References: <20200214222658.12946-1-borntraeger@de.ibm.com> <20200214222658.12946-33-borntraeger@de.ibm.com> From: Christian Borntraeger Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 20021911-0008-0000-0000-0000035462D0 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20021911-0009-0000-0000-00004A756F1E Message-Id: <31c40864-4f34-42b2-0435-f0580033f1d1@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-19_03:2020-02-19,2020-02-19 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 spamscore=0 bulkscore=0 impostorscore=0 mlxlogscore=999 lowpriorityscore=0 malwarescore=0 phishscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002190084 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 18.02.20 10:50, David Hildenbrand wrote: > On 14.02.20 23:26, Christian Borntraeger wrote: >> From: Janosch Frank >> >> Code 5 for the set cpu state UV call tells the UV to load a PSW from >> the SE header (first IPL) or from guest location 0x0 (diag 308 subcode >> 0/1). Also it sets the cpu into operating state afterwards, so we can >> start it. >> >> Signed-off-by: Janosch Frank >> Reviewed-by: Thomas Huth >> Reviewed-by: Cornelia Huck >> [borntraeger@de.ibm.com: patch merging, splitting, fixing] >> Signed-off-by: Christian Borntraeger >> --- >> arch/s390/include/asm/uv.h | 1 + >> arch/s390/kvm/kvm-s390.c | 8 ++++++++ >> include/uapi/linux/kvm.h | 1 + >> 3 files changed, 10 insertions(+) >> >> diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h >> index 7b82881ec3b4..d59825d95b9d 100644 >> --- a/arch/s390/include/asm/uv.h >> +++ b/arch/s390/include/asm/uv.h >> @@ -169,6 +169,7 @@ struct uv_cb_unp { >> #define PV_CPU_STATE_OPR 1 >> #define PV_CPU_STATE_STP 2 >> #define PV_CPU_STATE_CHKSTP 3 >> +#define PV_CPU_STATE_OPR_LOAD 5 >> >> struct uv_cb_cpu_set_state { >> struct uv_cb_header header; >> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c >> index 5426b01e3da1..b6113285f47f 100644 >> --- a/arch/s390/kvm/kvm-s390.c >> +++ b/arch/s390/kvm/kvm-s390.c >> @@ -4656,6 +4656,14 @@ static int kvm_s390_handle_pv_vcpu(struct kvm_vcpu *vcpu, >> r = kvm_s390_pv_destroy_cpu(vcpu, &cmd->rc, &cmd->rrc); >> break; >> } >> + case KVM_PV_VCPU_SET_IPL_PSW: { >> + if (!kvm_s390_pv_handle_cpu(vcpu)) >> + return -EINVAL; >> + >> + r = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_OPR_LOAD, >> + &cmd->rc, &cmd->rrc); > > Can we squeeze that into kvm_arch_vcpu_ioctl_set_mpstate() instead? The > interface seems to do exactly what you want it to do. > > KVM_MP_STATE_OPERATING_LOAD > > Allow it only when in PV. Ack, something like this seems to work. diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index a95c82089386..9496616cccc7 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -3710,6 +3710,12 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, kvm_s390_vcpu_start(vcpu); break; case KVM_MP_STATE_LOAD: + if (!kvm_s390_pv_cpu_is_protected(vcpu)) { + rc = -ENXIO; + break; + } + kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_OPR_LOAD); + break; case KVM_MP_STATE_CHECK_STOP: /* fall through - CHECK_STOP and LOAD are not supported yet */ default: