Merge tag 'pull-vfio-20231018' of https://github.com/legoater/qemu into staging

vfio queue:

* Support for VFIODisplay migration with ramfb
* Preliminary work for IOMMUFD support

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# gpg: Signature made Wed 18 Oct 2023 04:16:06 EDT
# gpg:                using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
# gpg: Good signature from "Cédric Le Goater <clg@redhat.com>" [unknown]
# gpg:                 aka "Cédric Le Goater <clg@kaod.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
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# Primary key fingerprint: A0F6 6548 F048 95EB FE6B  0B60 51A3 43C7 CFFB ECA1

* tag 'pull-vfio-20231018' of https://github.com/legoater/qemu: (22 commits)
  hw/vfio: add ramfb migration support
  ramfb-standalone: add migration support
  ramfb: add migration support
  vfio/pci: Remove vfio_detach_device from vfio_realize error path
  vfio/ccw: Remove redundant definition of TYPE_VFIO_CCW
  vfio/ap: Remove pointless apdev variable
  vfio/pci: Fix a potential memory leak in vfio_listener_region_add
  vfio/common: Move legacy VFIO backend code into separate container.c
  vfio/common: Introduce a global VFIODevice list
  vfio/common: Store the parent container in VFIODevice
  vfio/common: Introduce a per container device list
  vfio/common: Move VFIO reset handler registration to a group agnostic function
  vfio/ccw: Use vfio_[attach/detach]_device
  vfio/ap: Use vfio_[attach/detach]_device
  vfio/platform: Use vfio_[attach/detach]_device
  vfio/pci: Introduce vfio_[attach/detach]_device
  vfio/common: Extract out vfio_kvm_device_[add/del]_fd
  vfio/common: Introduce vfio_container_add|del_section_window()
  vfio/common: Propagate KVM_SET_DEVICE_ATTR error if any
  vfio/common: Move IOMMU agnostic helpers to a separate file
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 16 insertions, 60 deletions

diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
index 6e21d1da5a..5f257bffb9 100644
--- a/hw/vfio/ap.c
+++ b/hw/vfio/ap.c
@@ -53,40 +53,6 @@ struct VFIODeviceOps vfio_ap_ops = {
     .vfio_compute_needs_reset = vfio_ap_compute_needs_reset,
 };
 
-static void vfio_ap_put_device(VFIOAPDevice *vapdev)
-{
-    g_free(vapdev->vdev.name);
-    vfio_put_base_device(&vapdev->vdev);
-}
-
-static VFIOGroup *vfio_ap_get_group(VFIOAPDevice *vapdev, Error **errp)
-{
-    GError *gerror = NULL;
-    char *symlink, *group_path;
-    int groupid;
-
-    symlink = g_strdup_printf("%s/iommu_group", vapdev->vdev.sysfsdev);
-    group_path = g_file_read_link(symlink, &gerror);
-    g_free(symlink);
-
-    if (!group_path) {
-        error_setg(errp, "%s: no iommu_group found for %s: %s",
-                   TYPE_VFIO_AP_DEVICE, vapdev->vdev.sysfsdev, gerror->message);
-        g_error_free(gerror);
-        return NULL;
-    }
-
-    if (sscanf(basename(group_path), "%d", &groupid) != 1) {
-        error_setg(errp, "vfio: failed to read %s", group_path);
-        g_free(group_path);
-        return NULL;
-    }
-
-    g_free(group_path);
-
-    return vfio_get_group(groupid, &address_space_memory, errp);
-}
-
 static void vfio_ap_req_notifier_handler(void *opaque)
 {
     VFIOAPDevice *vapdev = opaque;
@@ -189,22 +155,14 @@ static void vfio_ap_unregister_irq_notifier(VFIOAPDevice *vapdev,
 static void vfio_ap_realize(DeviceState *dev, Error **errp)
 {
     int ret;
-    char *mdevid;
     Error *err = NULL;
-    VFIOGroup *vfio_group;
-    APDevice *apdev = AP_DEVICE(dev);
-    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
+    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(dev);
+    VFIODevice *vbasedev = &vapdev->vdev;
 
-    vfio_group = vfio_ap_get_group(vapdev, errp);
-    if (!vfio_group) {
-        return;
-    }
-
-    vapdev->vdev.ops = &vfio_ap_ops;
-    vapdev->vdev.type = VFIO_DEVICE_TYPE_AP;
-    mdevid = basename(vapdev->vdev.sysfsdev);
-    vapdev->vdev.name = g_strdup_printf("%s", mdevid);
-    vapdev->vdev.dev = dev;
+    vbasedev->name = g_path_get_basename(vbasedev->sysfsdev);
+    vbasedev->ops = &vfio_ap_ops;
+    vbasedev->type = VFIO_DEVICE_TYPE_AP;
+    vbasedev->dev = dev;
 
     /*
      * vfio-ap devices operate in a way compatible with discarding of
@@ -214,9 +172,10 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp)
      */
     vapdev->vdev.ram_block_discard_allowed = true;
 
-    ret = vfio_get_device(vfio_group, mdevid, &vapdev->vdev, errp);
+    ret = vfio_attach_device(vbasedev->name, vbasedev,
+                             &address_space_memory, errp);
     if (ret) {
-        goto out_get_dev_err;
+        goto error;
     }
 
     vfio_ap_register_irq_notifier(vapdev, VFIO_AP_REQ_IRQ_INDEX, &err);
@@ -230,20 +189,18 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp)
 
     return;
 
-out_get_dev_err:
-    vfio_ap_put_device(vapdev);
-    vfio_put_group(vfio_group);
+error:
+    error_prepend(errp, VFIO_MSG_PREFIX, vbasedev->name);
+    g_free(vbasedev->name);
 }
 
 static void vfio_ap_unrealize(DeviceState *dev)
 {
-    APDevice *apdev = AP_DEVICE(dev);
-    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
-    VFIOGroup *group = vapdev->vdev.group;
+    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(dev);
 
     vfio_ap_unregister_irq_notifier(vapdev, VFIO_AP_REQ_IRQ_INDEX);
-    vfio_ap_put_device(vapdev);
-    vfio_put_group(group);
+    vfio_detach_device(&vapdev->vdev);
+    g_free(vapdev->vdev.name);
 }
 
 static Property vfio_ap_properties[] = {
@@ -254,8 +211,7 @@ static Property vfio_ap_properties[] = {
 static void vfio_ap_reset(DeviceState *dev)
 {
     int ret;
-    APDevice *apdev = AP_DEVICE(dev);
-    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
+    VFIOAPDevice *vapdev = VFIO_AP_DEVICE(dev);
 
     ret = ioctl(vapdev->vdev.fd, VFIO_DEVICE_RESET);
     if (ret) {