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Tue, 24 May 2022 19:03:13 +0000 (GMT) From: Matthew Rosato To: qemu-s390x@nongnu.org Cc: alex.williamson@redhat.com, schnelle@linux.ibm.com, cohuck@redhat.com, thuth@redhat.com, farman@linux.ibm.com, pmorel@linux.ibm.com, richard.henderson@linaro.org, david@redhat.com, pasic@linux.ibm.com, borntraeger@linux.ibm.com, mst@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: [PATCH v6 0/8] s390x/pci: zPCI interpretation support Date: Tue, 24 May 2022 15:02:57 -0400 Message-Id: <20220524190305.140717-1-mjrosato@linux.ibm.com> X-Mailer: git-send-email 2.27.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: NGq1p70JZ31y0wUWPCs_752H-XHyzxU5 X-Proofpoint-GUID: xVRXw3okr8ZjfJii8GoCTWCkkgm6boti Content-Transfer-Encoding: 8bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-24_09,2022-05-23_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 priorityscore=1501 mlxscore=0 malwarescore=0 suspectscore=0 bulkscore=0 adultscore=0 phishscore=0 mlxlogscore=740 impostorscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2204290000 definitions=main-2205240094 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org For QEMU, the majority of the work in enabling instruction interpretation is handled via SHM bit settings (to indicate to firmware whether or not interpretive execution facilities are to be used) + a new KVM ioctl is used to setup firmware-interpreted forwarding of Adapter Event Notifications. This series also adds a new, optional 'interpret' parameter to zpci which can be used to disable interpretation support (interpret=off) as well as an 'forwarding_assist' parameter to determine whether or not the firmware assist will be used for adapter event delivery (default when interpretation is in use) or whether the host will be responsible for delivering all adapter event notifications (forwarding_assist=off). The ZPCI_INTERP CPU feature is added beginning with the z14 model to enable this support. As a consequence of implementing zPCI interpretation, ISM devices now become eligible for passthrough (but only when zPCI interpretation is available). >From the perspective of guest configuration, you passthrough zPCI devices in the same manner as before, with intepretation support being used by default if available in kernel+qemu. Associated kernel series: https://lore.kernel.org/kvm/20220524185907.140285-1-mjrosato@linux.ibm.com/ Changelog v5->v6: - Update linux headers (KVM_CAP_S390_ZPCI_OP changed) - Move featoff to ccw_machine_7_0_instance_options() (Thomas) - s390_pci_get_host_fh: s/unsigned int/uint32_t/ (Thomas) - s390_pci_kvm_interp_allowed: add !s390_is_pv() check (Pierre) - Fail guest SET PCI FN (enable) if we cannot get the host fh or if the retrieved host FH is not enabled (Pierre) - bugfix: don't free msix if we never initialized it Matthew Rosato (8): Update linux headers target/s390x: add zpci-interp to cpu models s390x/pci: add routine to get host function handle from CLP info s390x/pci: enable for load/store intepretation s390x/pci: don't fence interpreted devices without MSI-X s390x/pci: enable adapter event notification for interpreted devices s390x/pci: let intercept devices have separate PCI groups s390x/pci: reflect proper maxstbl for groups of interpreted devices hw/s390x/meson.build | 1 + hw/s390x/s390-pci-bus.c | 111 ++++++++++++++++++++++-- hw/s390x/s390-pci-inst.c | 56 +++++++++++- hw/s390x/s390-pci-kvm.c | 53 ++++++++++++ hw/s390x/s390-pci-vfio.c | 129 +++++++++++++++++++++++----- hw/s390x/s390-virtio-ccw.c | 1 + include/hw/s390x/s390-pci-bus.h | 8 +- include/hw/s390x/s390-pci-kvm.h | 38 ++++++++ include/hw/s390x/s390-pci-vfio.h | 5 ++ linux-headers/asm-s390/kvm.h | 1 + linux-headers/linux/kvm.h | 32 +++++++ linux-headers/linux/vfio.h | 4 +- linux-headers/linux/vfio_zdev.h | 7 ++ target/s390x/cpu_features_def.h.inc | 1 + target/s390x/gen-features.c | 2 + target/s390x/kvm/kvm.c | 8 ++ target/s390x/kvm/kvm_s390x.h | 1 + 17 files changed, 426 insertions(+), 32 deletions(-) create mode 100644 hw/s390x/s390-pci-kvm.c create mode 100644 include/hw/s390x/s390-pci-kvm.h -- 2.27.0