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Tue, 18 Aug 2020 14:58:33 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A56DE4203F; Tue, 18 Aug 2020 14:58:32 +0000 (GMT) Received: from oc3016276355.ibm.com (unknown [9.145.28.154]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 18 Aug 2020 14:58:32 +0000 (GMT) From: Pierre Morel To: linux-kernel@vger.kernel.org Cc: pasic@linux.ibm.com, borntraeger@de.ibm.com, frankja@linux.ibm.com, mst@redhat.com, jasowang@redhat.com, cohuck@redhat.com, kvm@vger.kernel.org, linux-s390@vger.kernel.org, virtualization@lists.linux-foundation.org, thomas.lendacky@amd.com, david@gibson.dropbear.id.au, linuxram@us.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com Subject: [PATCH v8 0/2] s390: virtio: let arch validate VIRTIO features Date: Tue, 18 Aug 2020 16:58:29 +0200 Message-Id: <1597762711-3550-1-git-send-email-pmorel@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-18_10:2020-08-18,2020-08-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 mlxlogscore=999 bulkscore=0 suspectscore=1 priorityscore=1501 malwarescore=0 impostorscore=0 adultscore=0 clxscore=1015 phishscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008180102 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, The goal of the series is to give a chance to the architecture to validate VIRTIO device features. in this respin: I use the original idea from Connie for an optional arch_has_restricted_memory_access. I renamed the callback accordingly, added the definition of ARCH_HAS_RESTRICTED_MEMORY_ACCESS inside the VIRTIO Kconfig and the selection in the PROTECTED_VIRTUALIZATION_GUEST config entry. Regards, Pierre Pierre Morel (2): virtio: let arch validate VIRTIO features s390: virtio: PV needs VIRTIO I/O device protection arch/s390/Kconfig | 1 + arch/s390/mm/init.c | 30 ++++++++++++++++++++++++++++++ drivers/virtio/Kconfig | 6 ++++++ drivers/virtio/virtio.c | 4 ++++ include/linux/virtio_config.h | 9 +++++++++ 5 files changed, 50 insertions(+) -- 2.25.1 Changelog to v8: - refactoring by using an optional callback (Connie) to v7: - typo in warning message (Connie) to v6: - rewording warning messages (Connie, Halil) to v5: - return directly from S390 arch_validate_virtio_features() when the guest is not protected. (Connie) - Somme rewording (Connie, Michael) - moved back code from arch/s390/ ...kernel/uv.c to ...mm/init.c (Christian) to v4: - separate virtio and arch code (Pierre) - moved code from arch/s390/mm/init.c to arch/s390/kernel/uv.c (as interpreted from Heiko's comment) - moved validation inside the arch code (Connie) - moved the call to arch validation before VIRTIO_F_1 test (Michael) to v3: - add warning (Connie, Christian) - add comment (Connie) - change hook name (Halil, Connie) to v2: - put the test in virtio_finalize_features() (Connie) - put the test inside VIRTIO core (Jason) - pass a virtio device as parameter (Halil)