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GET /api/1.2/patches/2219881/?format=api
{ "id": 2219881, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2219881/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260405072857.66484-7-scottjgo@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.2/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260405072857.66484-7-scottjgo@gmail.com>", "list_archive_url": null, "date": "2026-04-05T07:28:50", "name": "[RFC,06/10] vfio: Add device_reset callback to VFIODeviceIOOps", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9b1a405b00ea98fb3ed1e384b7cb5bfb83d49591", "submitter": { "id": 93060, "url": "http://patchwork.ozlabs.org/api/1.2/people/93060/?format=api", "name": "Scott J. Goldman", "email": "scottjgo@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260405072857.66484-7-scottjgo@gmail.com/mbox/", "series": [ { "id": 498765, "url": "http://patchwork.ozlabs.org/api/1.2/series/498765/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=498765", "date": "2026-04-05T07:28:44", "name": "vfio: PCI device passthrough on Apple Silicon Macs", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498765/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219881/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219881/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=ZCV2QlFG;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Goldman\" <scottjgo@gmail.com>", "To": "qemu-devel@nongnu.org", "Cc": "alex@shazbot.org, clg@redhat.com, pbonzini@redhat.com, rbolshakov@ddn.com,\n phil@philjordan.eu, mst@redhat.com, john.levon@nutanix.com,\n thanos.makatos@nutanix.com, qemu-s390x@nongnu.org,\n \"Scott J. Goldman\" <scottjgo@gmail.com>", "Subject": "[RFC PATCH 06/10] vfio: Add device_reset callback to VFIODeviceIOOps", "Date": "Sun, 5 Apr 2026 00:28:50 -0700", "Message-ID": "<20260405072857.66484-7-scottjgo@gmail.com>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<20260405072857.66484-1-scottjgo@gmail.com>", "References": "<20260405072857.66484-1-scottjgo@gmail.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=2607:f8b0:4864:20::1332;\n envelope-from=scottjgo@gmail.com; helo=mail-dy1-x1332.google.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Route all VFIO_DEVICE_RESET ioctl calls through a new device_reset\nio_ops callback, matching the pattern established for region_map and\nregion_unmap. This allows non-Linux backends to provide their own\nreset implementation.\n\nThe Linux ioctl backend implements the callback by issuing the\nVFIO_DEVICE_RESET ioctl. All existing callsites in pci.c, ccw.c,\nap.c, and migration.c are converted to use the callback.\n\nSigned-off-by: Scott J. Goldman <scottjgo@gmail.com>\n---\n hw/vfio/ap.c | 4 ++--\n hw/vfio/ccw.c | 2 +-\n hw/vfio/device.c | 8 ++++++++\n hw/vfio/migration.c | 5 +++--\n hw/vfio/pci.c | 6 ++++--\n include/hw/vfio/vfio-device.h | 11 +++++++++++\n 6 files changed, 29 insertions(+), 7 deletions(-)", "diff": "diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c\nindex 5c8f305653..2f2f17e666 100644\n--- a/hw/vfio/ap.c\n+++ b/hw/vfio/ap.c\n@@ -290,10 +290,10 @@ static void vfio_ap_reset(DeviceState *dev)\n int ret;\n VFIOAPDevice *vapdev = VFIO_AP_DEVICE(dev);\n \n- ret = ioctl(vapdev->vdev.fd, VFIO_DEVICE_RESET);\n+ ret = vapdev->vdev.io_ops->device_reset(&vapdev->vdev);\n if (ret) {\n error_report(\"%s: failed to reset %s device: %s\", __func__,\n- vapdev->vdev.name, strerror(errno));\n+ vapdev->vdev.name, strerror(-ret));\n }\n }\n \ndiff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c\nindex ce9c014e6a..330b733b7e 100644\n--- a/hw/vfio/ccw.c\n+++ b/hw/vfio/ccw.c\n@@ -242,7 +242,7 @@ static void vfio_ccw_reset(DeviceState *dev)\n {\n VFIOCCWDevice *vcdev = VFIO_CCW(dev);\n \n- ioctl(vcdev->vdev.fd, VFIO_DEVICE_RESET);\n+ vcdev->vdev.io_ops->device_reset(&vcdev->vdev);\n }\n \n static void vfio_ccw_crw_read(VFIOCCWDevice *vcdev)\ndiff --git a/hw/vfio/device.c b/hw/vfio/device.c\nindex 1b703dcbec..cf3953d975 100644\n--- a/hw/vfio/device.c\n+++ b/hw/vfio/device.c\n@@ -657,6 +657,13 @@ static int vfio_device_io_region_write(VFIODevice *vbasedev, uint8_t index,\n return ret < 0 ? -errno : ret;\n }\n \n+static int vfio_device_io_device_reset(VFIODevice *vbasedev)\n+{\n+ int ret = ioctl(vbasedev->fd, VFIO_DEVICE_RESET);\n+\n+ return ret < 0 ? -errno : ret;\n+}\n+\n static int vfio_device_io_region_map(VFIODevice *vbasedev, VFIORegion *region)\n {\n return vfio_region_mmap_fd(region);\n@@ -673,6 +680,7 @@ static VFIODeviceIOOps vfio_device_io_ops_ioctl = {\n .get_region_info = vfio_device_io_get_region_info,\n .get_irq_info = vfio_device_io_get_irq_info,\n .set_irqs = vfio_device_io_set_irqs,\n+ .device_reset = vfio_device_io_device_reset,\n .region_read = vfio_device_io_region_read,\n .region_write = vfio_device_io_region_write,\n .region_map = vfio_device_io_region_map,\ndiff --git a/hw/vfio/migration.c b/hw/vfio/migration.c\nindex 83327b6573..b31253ea90 100644\n--- a/hw/vfio/migration.c\n+++ b/hw/vfio/migration.c\n@@ -216,9 +216,10 @@ int vfio_migration_set_state(VFIODevice *vbasedev,\n return 0;\n \n reset_device:\n- if (ioctl(vbasedev->fd, VFIO_DEVICE_RESET)) {\n+ ret = vbasedev->io_ops->device_reset(vbasedev);\n+ if (ret) {\n hw_error(\"%s: Failed resetting device, err: %s\", vbasedev->name,\n- strerror(errno));\n+ strerror(-ret));\n }\n \n vfio_migration_set_device_state(vbasedev, VFIO_DEVICE_STATE_RUNNING);\ndiff --git a/hw/vfio/pci.c b/hw/vfio/pci.c\nindex cf817d9ae7..458b3400cc 100644\n--- a/hw/vfio/pci.c\n+++ b/hw/vfio/pci.c\n@@ -3691,7 +3691,8 @@ static void vfio_pci_reset(DeviceState *dev)\n \n if (vdev->vbasedev.reset_works &&\n (vdev->has_flr || !vdev->has_pm_reset) &&\n- !ioctl(vdev->vbasedev.fd, VFIO_DEVICE_RESET)) {\n+ vdev->vbasedev.io_ops && vdev->vbasedev.io_ops->device_reset &&\n+ !vdev->vbasedev.io_ops->device_reset(&vdev->vbasedev)) {\n trace_vfio_pci_reset_flr(vdev->vbasedev.name);\n goto post_reset;\n }\n@@ -3703,7 +3704,8 @@ static void vfio_pci_reset(DeviceState *dev)\n \n /* If nothing else works and the device supports PM reset, use it */\n if (vdev->vbasedev.reset_works && vdev->has_pm_reset &&\n- !ioctl(vdev->vbasedev.fd, VFIO_DEVICE_RESET)) {\n+ vdev->vbasedev.io_ops && vdev->vbasedev.io_ops->device_reset &&\n+ !vdev->vbasedev.io_ops->device_reset(&vdev->vbasedev)) {\n trace_vfio_pci_reset_pm(vdev->vbasedev.name);\n goto post_reset;\n }\ndiff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h\nindex 1a3b42bcaf..0e6bff774e 100644\n--- a/include/hw/vfio/vfio-device.h\n+++ b/include/hw/vfio/vfio-device.h\n@@ -262,6 +262,17 @@ struct VFIODeviceIOOps {\n int (*region_write)(VFIODevice *vdev, uint8_t nr, off_t off, uint32_t size,\n void *data, bool post);\n \n+ /**\n+ * @device_reset\n+ *\n+ * Reset the device.\n+ *\n+ * @vdev: #VFIODevice to reset\n+ *\n+ * Returns 0 on success or -errno.\n+ */\n+ int (*device_reset)(VFIODevice *vdev);\n+\n /**\n * @region_map\n *\n", "prefixes": [ "RFC", "06/10" ] }