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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 24 Jan 2020 18:33:28 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 00OIXR5w30998886 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 24 Jan 2020 18:33:28 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D8ABF52050; Fri, 24 Jan 2020 18:33:27 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.152.224.41]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 6BB0A5204E; Fri, 24 Jan 2020 18:33:27 +0000 (GMT) Subject: Re: [PATCH v4 06/10] KVM: selftests: Add support for vcpu_args_set to aarch64 and s390x To: Paolo Bonzini , Ben Gardon , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Cannon Matthews , Peter Xu , Andrew Jones , Peter Shier , Oliver Upton , Marc Zyngier , Cornelia Huck , Thomas Huth References: <20200123180436.99487-1-bgardon@google.com> <20200123180436.99487-7-bgardon@google.com> <4dbb6d1b-3162-d9b3-4ebb-5e4061776bb6@redhat.com> From: Christian Borntraeger Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <4dbb6d1b-3162-d9b3-4ebb-5e4061776bb6@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 20012418-0016-0000-0000-000002E062EB X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20012418-0017-0000-0000-000033431925 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-24_06:2020-01-24,2020-01-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 mlxscore=0 impostorscore=0 adultscore=0 mlxlogscore=922 priorityscore=1501 malwarescore=0 spamscore=0 clxscore=1011 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001240151 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org On 24.01.20 10:03, Paolo Bonzini wrote: > CCing Marc, Conny and Christian (plus Thomas and Drew who were already > in the list) for review. CC Thomas Huth, > > Thanks, > > Paolo > > On 23/01/20 19:04, Ben Gardon wrote: >> Currently vcpu_args_set is only implemented for x86. This makes writing >> tests with multiple vCPUs difficult as each guest vCPU must either a.) >> do the same thing or b.) derive some kind of unique token from it's >> registers or the architecture. To simplify the process of writing tests >> with multiple vCPUs for s390 and aarch64, add set args functions for >> those architectures. [...] >> .../selftests/kvm/lib/s390x/processor.c | 35 +++++++++++++++++++ [...] >> --- a/tools/testing/selftests/kvm/lib/s390x/processor.c >> +++ b/tools/testing/selftests/kvm/lib/s390x/processor.c >> @@ -269,6 +269,41 @@ void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code) >> run->psw_addr = (uintptr_t)guest_code; >> } >> >> +/* VM VCPU Args Set >> + * >> + * Input Args: >> + * vm - Virtual Machine >> + * vcpuid - VCPU ID >> + * num - number of arguments >> + * ... - arguments, each of type uint64_t >> + * >> + * Output Args: None >> + * >> + * Return: None >> + * >> + * Sets the first num function input arguments to the values >> + * given as variable args. Each of the variable args is expected to >> + * be of type uint64_t. The registers set by this function are r2-r6. >> + */ >> +void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...) >> +{ >> + va_list ap; >> + struct kvm_regs regs; >> + >> + TEST_ASSERT(num >= 1 && num <= 5, "Unsupported number of args,\n" >> + " num: %u\n", >> + num); >> + >> + va_start(ap, num); >> + vcpu_regs_get(vm, vcpuid, ®s); >> + >> + for (i = 0; i < num; i++) >> + regs.gprs[i + 2] = va_arg(ap, uint64_t); >> + >> + vcpu_regs_set(vm, vcpuid, ®s); >> + va_end(ap); >> +} >> + >> void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent) >> { >> struct vcpu *vcpu = vm->vcpu_head; >> > Untested but the logic looks sane according to the ELF ABI.