qemu-kvm/kvm-vfio-spapr-Extend-VFIOIOMMUOps-with-a-release-handle.patch

From e75ec2aca351daabe597ca6322c1589885f30d7a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
Date: Tue, 19 Dec 2023 07:58:16 +0100
Subject: [PATCH 049/101] vfio/spapr: Extend VFIOIOMMUOps with a release
 handler
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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: [48/67] 1c4d22a6f69324805d050767fcf178d8566f2030 (eauger1/centos-qemu-kvm)

This allows to abstract a bit more the sPAPR IOMMU support in the
legacy IOMMU backend.

Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Tested-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
(cherry picked from commit 001a013ea3f125d2ec0e709b5765754149d8d968)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/vfio/container.c                   | 10 +++-----
 hw/vfio/spapr.c                       | 35 +++++++++++++++------------
 include/hw/vfio/vfio-container-base.h |  1 +
 3 files changed, 24 insertions(+), 22 deletions(-)

diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index b22feb8ded..1e77a2929e 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -632,9 +632,8 @@ listener_release_exit:
     QLIST_REMOVE(bcontainer, next);
     vfio_kvm_device_del_group(group);
     memory_listener_unregister(&bcontainer->listener);
-    if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU ||
-        container->iommu_type == VFIO_SPAPR_TCE_IOMMU) {
-        vfio_spapr_container_deinit(container);
+    if (bcontainer->ops->release) {
+        bcontainer->ops->release(bcontainer);
     }
 
 enable_discards_exit:
@@ -667,9 +666,8 @@ static void vfio_disconnect_container(VFIOGroup *group)
      */
     if (QLIST_EMPTY(&container->group_list)) {
         memory_listener_unregister(&bcontainer->listener);
-        if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU ||
-            container->iommu_type == VFIO_SPAPR_TCE_IOMMU) {
-            vfio_spapr_container_deinit(container);
+        if (bcontainer->ops->release) {
+            bcontainer->ops->release(bcontainer);
         }
     }
 
diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c
index 5c6426e697..44617dfc6b 100644
--- a/hw/vfio/spapr.c
+++ b/hw/vfio/spapr.c
@@ -440,6 +440,24 @@ vfio_spapr_container_del_section_window(VFIOContainerBase *bcontainer,
     }
 }
 
+static void vfio_spapr_container_release(VFIOContainerBase *bcontainer)
+{
+    VFIOContainer *container = container_of(bcontainer, VFIOContainer,
+                                            bcontainer);
+    VFIOSpaprContainer *scontainer = container_of(container, VFIOSpaprContainer,
+                                                  container);
+    VFIOHostDMAWindow *hostwin, *next;
+
+    if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
+        memory_listener_unregister(&scontainer->prereg_listener);
+    }
+    QLIST_FOREACH_SAFE(hostwin, &scontainer->hostwin_list, hostwin_next,
+                       next) {
+        QLIST_REMOVE(hostwin, hostwin_next);
+        g_free(hostwin);
+    }
+}
+
 static VFIOIOMMUOps vfio_iommu_spapr_ops;
 
 static void setup_spapr_ops(VFIOContainerBase *bcontainer)
@@ -447,6 +465,7 @@ static void setup_spapr_ops(VFIOContainerBase *bcontainer)
     vfio_iommu_spapr_ops = *bcontainer->ops;
     vfio_iommu_spapr_ops.add_window = vfio_spapr_container_add_section_window;
     vfio_iommu_spapr_ops.del_window = vfio_spapr_container_del_section_window;
+    vfio_iommu_spapr_ops.release = vfio_spapr_container_release;
     bcontainer->ops = &vfio_iommu_spapr_ops;
 }
 
@@ -527,19 +546,3 @@ listener_unregister_exit:
     }
     return ret;
 }
-
-void vfio_spapr_container_deinit(VFIOContainer *container)
-{
-    VFIOSpaprContainer *scontainer = container_of(container, VFIOSpaprContainer,
-                                                  container);
-    VFIOHostDMAWindow *hostwin, *next;
-
-    if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
-        memory_listener_unregister(&scontainer->prereg_listener);
-    }
-    QLIST_FOREACH_SAFE(hostwin, &scontainer->hostwin_list, hostwin_next,
-                       next) {
-        QLIST_REMOVE(hostwin, hostwin_next);
-        g_free(hostwin);
-    }
-}
diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
index 2ae297ccda..5c9594b6c7 100644
--- a/include/hw/vfio/vfio-container-base.h
+++ b/include/hw/vfio/vfio-container-base.h
@@ -117,5 +117,6 @@ struct VFIOIOMMUOps {
                       Error **errp);
     void (*del_window)(VFIOContainerBase *bcontainer,
                        MemoryRegionSection *section);
+    void (*release)(VFIOContainerBase *bcontainer);
 };
 #endif /* HW_VFIO_VFIO_CONTAINER_BASE_H */
-- 
2.39.3