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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 24 Feb 2020 14:13:57 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01OEDuBI52297908 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 24 Feb 2020 14:13:56 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3260F52051; Mon, 24 Feb 2020 14:13:56 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.152.224.211]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id EDA885204E; Mon, 24 Feb 2020 14:13:55 +0000 (GMT) Subject: Re: [PATCH v4 03/16] s390x: protvirt: Support unpack facility To: Janosch Frank , qemu-devel@nongnu.org References: <20200220125638.7241-1-frankja@linux.ibm.com> <20200220125638.7241-4-frankja@linux.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: <20200220125638.7241-4-frankja@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20022414-4275-0000-0000-000003A5002D X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20022414-4276-0000-0000-000038B9135A Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-02-24_04:2020-02-21, 2020-02-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 mlxscore=0 malwarescore=0 phishscore=0 mlxlogscore=999 lowpriorityscore=0 bulkscore=0 adultscore=0 impostorscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002240117 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.156.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cohuck@redhat.com, qemu-s390x@nongnu.org, mihajlov@linux.ibm.com, david@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 20.02.20 13:56, Janosch Frank wrote: > When a guest has saved a ipib of type 5 and calls diagnose308 with > subcode 10, we have to setup the protected processing environment via > Ultravisor calls. The calls are done by KVM and are exposed via an > API. > > The following steps are necessary: > 1. Create a VM (register it with the Ultravisor) > 2. Create secure CPUs for all of our current cpus maybe rephrase that to reflect the enable/disable change? > 3. Forward the secure header to the Ultravisor (has all information on > how to decrypt the image and VM information) > 4. Protect image pages from the host and decrypt them > 5. Verify the image integrity > > Only after step 5 a protected VM is allowed to run. > > Signed-off-by: Janosch Frank > Signed-off-by: Christian Borntraeger [Changes > to machine] [...] > diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c > new file mode 100644 > index 0000000000..8ae20f31c1 > --- /dev/null > +++ b/hw/s390x/pv.c > @@ -0,0 +1,106 @@ > +/* > + * Secure execution functions > + * > + * Copyright IBM Corp. 2020 > + * Author(s): > + * Janosch Frank > + * > + * This work is licensed under the terms of the GNU GPL, version 2 or (at > + * your option) any later version. See the COPYING file in the top-level > + * directory. > + */ > +#include "qemu/osdep.h" > +#include > + > +#include > + > +#include "qemu/error-report.h" > +#include "sysemu/kvm.h" > +#include "pv.h" > + > +const char *cmd_names[] = { > + "VM_CREATE", > + "VM_DESTROY", ENABLE/DISABLE? > + "VM_SET_SEC_PARAMS", > + "VM_UNPACK", > + "VM_VERIFY", > + "VM_PREP_RESET", > + "VM_UNSHARE_ALL", > + NULL > +}; Wild idea. Not sure if this is acceptable in QEMU. These strings are only for the error_report, no? Could we use a MACRO that uses this a as a string and b as the inter value? -static int s390_pv_cmd(uint32_t cmd, void *data) +#define S390_PV_CMD(cmd, data) s390_pv_cmd(cmd, #cmd, data) +static int s390_pv_cmd(uint32_t cmd, const char *name, void *data) and then replace all calls with S390_PV_CMD. (Of course also change the error report to use name). > + > +static int s390_pv_cmd(uint32_t cmd, void *data) > +{ > + int rc; > + struct kvm_pv_cmd pv_cmd = { > + .cmd = cmd, > + .data = (uint64_t)data, > + }; > + > + rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd); > + if (rc) { > + error_report("KVM PV command %d (%s) failed: header rc %x rrc %x " > + "IOCTL rc: %d", cmd, cmd_names[cmd], pv_cmd.rc, pv_cmd.rrc, > + rc); > + } > + return rc; > +} [...] Maybe also change the subject. We do more than just unpack.