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Mon, 6 Jun 2022 20:33:30 +0000 (GMT) From: Matthew Rosato To: linux-s390@vger.kernel.org Cc: alex.williamson@redhat.com, cohuck@redhat.com, schnelle@linux.ibm.com, farman@linux.ibm.com, pmorel@linux.ibm.com, borntraeger@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, gerald.schaefer@linux.ibm.com, agordeev@linux.ibm.com, svens@linux.ibm.com, frankja@linux.ibm.com, david@redhat.com, imbrenda@linux.ibm.com, vneethv@linux.ibm.com, oberpar@linux.ibm.com, freude@linux.ibm.com, thuth@redhat.com, pasic@linux.ibm.com, pbonzini@redhat.com, corbet@lwn.net, jgg@nvidia.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v9 00/21] KVM: s390: enable zPCI for interpretive execution Date: Mon, 6 Jun 2022 16:33:04 -0400 Message-Id: <20220606203325.110625-1-mjrosato@linux.ibm.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: omq43zn8Fvpd3iFHsPjZqZEbFgnkl7K6 X-Proofpoint-ORIG-GUID: sMVQ8GBkz46JvGw-FcCj701Z55cO68El X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.517,FMLib:17.11.64.514 definitions=2022-06-06_06,2022-06-03_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 mlxscore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 adultscore=0 impostorscore=0 malwarescore=0 phishscore=0 mlxlogscore=711 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2204290000 definitions=main-2206060081 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org Enable interpretive execution of zPCI instructions + adapter interruption forwarding for s390x KVM vfio-pci. This is done by triggering a routine when the VFIO group is associated with the KVM guest, transmitting to firmware a special token (GISA designation) to enable that specific guest for interpretive execution on that zPCI device. Load/store interpreation enablement is then controlled by userspace (based upon whether or not a SHM bit is placed in the virtual function handle). Adapter Event Notification interpretation is controlled from userspace via a new KVM ioctl. By allowing intepretation of zPCI instructions and firmware delivery of interrupts to guests, we can reduce the frequency of guest SIE exits for zPCI. >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. Will follow up with a link the most recent QEMU series. Changelog v8->v9: - Rebase on top of 5.19-rc1, adjust ioctl and capability defines - s/kzdev = 0/kzdev = NULL/ (Alex) - rename vfio_pci_zdev_open to vfio_pci_zdev_open_device (Jason) - rename vfio_pci_zdev_release to vfio_pci_zdev_close_device (Jason) - make vfio_pci_zdev_close_device return void, instead WARN_ON or ignore errors in lower level function (kvm_s390_pci_unregister_kvm) (Jason) - remove notifier accidentally left in struct zpci_dev + associated include statment (Jason) - Remove patch 'KVM: s390: introduce CPU feature for zPCI Interpretation' based on discussion in QEMU thread. Matthew Rosato (21): s390/sclp: detect the zPCI load/store interpretation facility s390/sclp: detect the AISII facility s390/sclp: detect the AENI facility s390/sclp: detect the AISI facility s390/airq: pass more TPI info to airq handlers s390/airq: allow for airq structure that uses an input vector s390/pci: externalize the SIC operation controls and routine s390/pci: stash associated GISA designation s390/pci: stash dtsm and maxstbl vfio/pci: introduce CONFIG_VFIO_PCI_ZDEV_KVM KVM: s390: pci: add basic kvm_zdev structure KVM: s390: pci: do initial setup for AEN interpretation KVM: s390: pci: enable host forwarding of Adapter Event Notifications KVM: s390: mechanism to enable guest zPCI Interpretation KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding KVM: s390: pci: add routines to start/stop interpretive execution vfio-pci/zdev: add open/close device hooks vfio-pci/zdev: add function handle to clp base capability vfio-pci/zdev: different maxstbl for interpreted devices KVM: s390: add KVM_S390_ZPCI_OP to manage guest zPCI devices MAINTAINERS: additional files related kvm s390 pci passthrough Documentation/virt/kvm/api.rst | 47 +++ MAINTAINERS | 1 + arch/s390/include/asm/airq.h | 7 +- arch/s390/include/asm/kvm_host.h | 23 ++ arch/s390/include/asm/pci.h | 11 + arch/s390/include/asm/pci_clp.h | 9 +- arch/s390/include/asm/pci_insn.h | 29 +- arch/s390/include/asm/sclp.h | 4 + arch/s390/include/asm/tpi.h | 13 + arch/s390/kvm/Makefile | 1 + arch/s390/kvm/interrupt.c | 96 ++++- arch/s390/kvm/kvm-s390.c | 83 +++- arch/s390/kvm/kvm-s390.h | 10 + arch/s390/kvm/pci.c | 690 +++++++++++++++++++++++++++++++ arch/s390/kvm/pci.h | 88 ++++ arch/s390/pci/pci.c | 16 + arch/s390/pci/pci_clp.c | 7 + arch/s390/pci/pci_insn.c | 4 +- arch/s390/pci/pci_irq.c | 48 ++- drivers/s390/char/sclp_early.c | 4 + drivers/s390/cio/airq.c | 12 +- drivers/s390/cio/qdio_thinint.c | 6 +- drivers/s390/crypto/ap_bus.c | 9 +- drivers/s390/virtio/virtio_ccw.c | 6 +- drivers/vfio/pci/Kconfig | 11 + drivers/vfio/pci/Makefile | 2 +- drivers/vfio/pci/vfio_pci_core.c | 10 +- drivers/vfio/pci/vfio_pci_zdev.c | 35 +- include/linux/sched/user.h | 3 +- include/linux/vfio_pci_core.h | 12 +- include/uapi/linux/kvm.h | 31 ++ include/uapi/linux/vfio_zdev.h | 7 + 32 files changed, 1279 insertions(+), 56 deletions(-) create mode 100644 arch/s390/kvm/pci.c create mode 100644 arch/s390/kvm/pci.h -- 2.27.0