forked from rpms/qemu-kvm
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88 lines
2.9 KiB
88 lines
2.9 KiB
9 months ago
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From db09b7c60c01ee75d602261ee959a96fa0d89d68 Mon Sep 17 00:00:00 2001
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From: Zhenzhong Duan <zhenzhong.duan@intel.com>
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Date: Tue, 21 Nov 2023 16:44:14 +0800
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Subject: [PATCH 035/101] vfio/ap: Make vfio cdev pre-openable by passing a
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file handle
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Eric Auger <eric.auger@redhat.com>
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RH-MergeRequest: 211: IOMMUFD backend backport
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RH-Jira: RHEL-19302 RHEL-21057
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RH-Acked-by: Cédric Le Goater <clg@redhat.com>
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RH-Acked-by: Sebastian Ott <sebott@redhat.com>
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RH-Commit: [34/67] aaafa6088a9b0302d53aa539f67792d02ea0f663 (eauger1/centos-qemu-kvm)
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This gives management tools like libvirt a chance to open the vfio
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cdev with privilege and pass FD to qemu. This way qemu never needs
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to have privilege to open a VFIO or iommu cdev node.
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Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
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Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
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Reviewed-by: Cédric Le Goater <clg@redhat.com>
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Tested-by: Nicolin Chen <nicolinc@nvidia.com>
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Signed-off-by: Cédric Le Goater <clg@redhat.com>
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(cherry picked from commit 5e7ba401b71d18544a3e44b2a58b9e63fd5148d5)
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Signed-off-by: Eric Auger <eric.auger@redhat.com>
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---
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hw/vfio/ap.c | 23 ++++++++++++++++++++++-
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1 file changed, 22 insertions(+), 1 deletion(-)
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diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
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index 80629609ae..f180e4a32a 100644
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--- a/hw/vfio/ap.c
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+++ b/hw/vfio/ap.c
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@@ -160,7 +160,10 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp)
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VFIOAPDevice *vapdev = VFIO_AP_DEVICE(dev);
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VFIODevice *vbasedev = &vapdev->vdev;
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- vbasedev->name = g_path_get_basename(vbasedev->sysfsdev);
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+ if (vfio_device_get_name(vbasedev, errp) < 0) {
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+ return;
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+ }
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+
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vbasedev->ops = &vfio_ap_ops;
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vbasedev->type = VFIO_DEVICE_TYPE_AP;
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vbasedev->dev = dev;
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@@ -230,11 +233,28 @@ static const VMStateDescription vfio_ap_vmstate = {
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.unmigratable = 1,
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};
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+static void vfio_ap_instance_init(Object *obj)
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+{
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+ VFIOAPDevice *vapdev = VFIO_AP_DEVICE(obj);
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+
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+ vapdev->vdev.fd = -1;
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+}
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+
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+#ifdef CONFIG_IOMMUFD
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+static void vfio_ap_set_fd(Object *obj, const char *str, Error **errp)
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+{
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+ vfio_device_set_fd(&VFIO_AP_DEVICE(obj)->vdev, str, errp);
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+}
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+#endif
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+
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static void vfio_ap_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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device_class_set_props(dc, vfio_ap_properties);
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+#ifdef CONFIG_IOMMUFD
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+ object_class_property_add_str(klass, "fd", NULL, vfio_ap_set_fd);
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+#endif
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dc->vmsd = &vfio_ap_vmstate;
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dc->desc = "VFIO-based AP device assignment";
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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@@ -249,6 +269,7 @@ static const TypeInfo vfio_ap_info = {
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.name = TYPE_VFIO_AP_DEVICE,
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.parent = TYPE_AP_DEVICE,
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.instance_size = sizeof(VFIOAPDevice),
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+ .instance_init = vfio_ap_instance_init,
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.class_init = vfio_ap_class_init,
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};
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--
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2.39.3
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