qemu-kvm/kvm-vfio-container-Implement-attach-detach_device.patch

From a5d19bfbfddb36fa6d68ca6282a5acd9b245d48a Mon Sep 17 00:00:00 2001
From: Eric Auger <eric.auger@redhat.com>
Date: Thu, 2 Nov 2023 15:12:41 +0800
Subject: [PATCH 016/101] vfio/container: Implement attach/detach_device
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RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 211: IOMMUFD backend backport
RH-Jira: RHEL-19302 RHEL-21057
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
RH-Acked-by: Sebastian Ott <sebott@redhat.com>
RH-Commit: [15/67] e233c90e4af2061dc0612bc1b1d17be1a47daeae (eauger1/centos-qemu-kvm)

No functional change intended.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
(cherry picked from commit 1eb31f13b24c49884d8256f96a6664df2dd0824d)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/vfio/common.c    | 16 ++++++++++++++++
 hw/vfio/container.c | 12 +++++-------
 2 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 8ef2e7967d..483ba82089 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1498,3 +1498,19 @@ retry:
 
     return info;
 }
+
+int vfio_attach_device(char *name, VFIODevice *vbasedev,
+                       AddressSpace *as, Error **errp)
+{
+    const VFIOIOMMUOps *ops = &vfio_legacy_ops;
+
+    return ops->attach_device(name, vbasedev, as, errp);
+}
+
+void vfio_detach_device(VFIODevice *vbasedev)
+{
+    if (!vbasedev->bcontainer) {
+        return;
+    }
+    vbasedev->bcontainer->ops->detach_device(vbasedev);
+}
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index 721c0d7375..6bacf38222 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -873,8 +873,8 @@ static int vfio_device_groupid(VFIODevice *vbasedev, Error **errp)
  * @name and @vbasedev->name are likely to be different depending
  * on the type of the device, hence the need for passing @name
  */
-int vfio_attach_device(char *name, VFIODevice *vbasedev,
-                       AddressSpace *as, Error **errp)
+static int vfio_legacy_attach_device(const char *name, VFIODevice *vbasedev,
+                                     AddressSpace *as, Error **errp)
 {
     int groupid = vfio_device_groupid(vbasedev, errp);
     VFIODevice *vbasedev_iter;
@@ -914,14 +914,10 @@ int vfio_attach_device(char *name, VFIODevice *vbasedev,
     return ret;
 }
 
-void vfio_detach_device(VFIODevice *vbasedev)
+static void vfio_legacy_detach_device(VFIODevice *vbasedev)
 {
     VFIOGroup *group = vbasedev->group;
 
-    if (!vbasedev->bcontainer) {
-        return;
-    }
-
     QLIST_REMOVE(vbasedev, global_next);
     QLIST_REMOVE(vbasedev, container_next);
     vbasedev->bcontainer = NULL;
@@ -933,6 +929,8 @@ void vfio_detach_device(VFIODevice *vbasedev)
 const VFIOIOMMUOps vfio_legacy_ops = {
     .dma_map = vfio_legacy_dma_map,
     .dma_unmap = vfio_legacy_dma_unmap,
+    .attach_device = vfio_legacy_attach_device,
+    .detach_device = vfio_legacy_detach_device,
     .set_dirty_page_tracking = vfio_legacy_set_dirty_page_tracking,
     .query_dirty_bitmap = vfio_legacy_query_dirty_bitmap,
 };
-- 
2.39.3