qemu-kvm/kvm-vfio-common-Introduce-vfio_container_init-destroy-he.patch

From 7de36998dd6177380e46b8c5f3a91c3fad75483c Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Thu, 2 Nov 2023 15:12:30 +0800
Subject: [PATCH 005/101] vfio/common: Introduce vfio_container_init/destroy
 helper
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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: [4/67] 8287f687ef19cd84afede1e8f3b16ac3caf29a1d (eauger1/centos-qemu-kvm)

This adds two helper functions vfio_container_init/destroy which will be
used by both legacy and iommufd containers to do base container specific
initialization and release.

No functional change intended.

Suggested-by: Cédric Le Goater <clg@redhat.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 ed2f7f80170251e7cdd2965a13ee97527d1fbec8)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/vfio/container-base.c              | 9 +++++++++
 hw/vfio/container.c                   | 4 +++-
 include/hw/vfio/vfio-container-base.h | 4 ++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/hw/vfio/container-base.c b/hw/vfio/container-base.c
index 55d3a35fa4..e929435751 100644
--- a/hw/vfio/container-base.c
+++ b/hw/vfio/container-base.c
@@ -30,3 +30,12 @@ int vfio_container_dma_unmap(VFIOContainerBase *bcontainer,
     g_assert(bcontainer->ops->dma_unmap);
     return bcontainer->ops->dma_unmap(bcontainer, iova, size, iotlb);
 }
+
+void vfio_container_init(VFIOContainerBase *bcontainer, const VFIOIOMMUOps *ops)
+{
+    bcontainer->ops = ops;
+}
+
+void vfio_container_destroy(VFIOContainerBase *bcontainer)
+{
+}
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index c04df26323..32a0251dd1 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -559,7 +559,7 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as,
     QLIST_INIT(&container->giommu_list);
     QLIST_INIT(&container->vrdl_list);
     bcontainer = &container->bcontainer;
-    bcontainer->ops = &vfio_legacy_ops;
+    vfio_container_init(bcontainer, &vfio_legacy_ops);
 
     ret = vfio_init_container(container, group->fd, errp);
     if (ret) {
@@ -661,6 +661,7 @@ put_space_exit:
 static void vfio_disconnect_container(VFIOGroup *group)
 {
     VFIOContainer *container = group->container;
+    VFIOContainerBase *bcontainer = &container->bcontainer;
 
     QLIST_REMOVE(group, container_next);
     group->container = NULL;
@@ -695,6 +696,7 @@ static void vfio_disconnect_container(VFIOGroup *group)
             QLIST_REMOVE(giommu, giommu_next);
             g_free(giommu);
         }
+        vfio_container_destroy(bcontainer);
 
         trace_vfio_disconnect_container(container->fd);
         close(container->fd);
diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
index 56b033f59f..577f52ccbc 100644
--- a/include/hw/vfio/vfio-container-base.h
+++ b/include/hw/vfio/vfio-container-base.h
@@ -38,6 +38,10 @@ int vfio_container_dma_unmap(VFIOContainerBase *bcontainer,
                              hwaddr iova, ram_addr_t size,
                              IOMMUTLBEntry *iotlb);
 
+void vfio_container_init(VFIOContainerBase *bcontainer,
+                         const VFIOIOMMUOps *ops);
+void vfio_container_destroy(VFIOContainerBase *bcontainer);
+
 struct VFIOIOMMUOps {
     /* basic feature */
     int (*dma_map)(VFIOContainerBase *bcontainer,
-- 
2.39.3