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[RFC 12/18] vfio/container-obj: Introduce [attach/detach]_device contain
From: |
Yi Liu |
Subject: |
[RFC 12/18] vfio/container-obj: Introduce [attach/detach]_device container callbacks |
Date: |
Thu, 14 Apr 2022 03:47:04 -0700 |
From: Eric Auger <eric.auger@redhat.com>
Let's turn attach/detach_device as container callbacks. That way,
their implementation can be easily customized for a given backend.
For the time being, only the legacy container is supported.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
hw/vfio/as.c | 36 ++++++++++++++++++++++++++++
hw/vfio/container.c | 11 +++++----
hw/vfio/pci.c | 2 +-
include/hw/vfio/vfio-common.h | 7 ++++++
include/hw/vfio/vfio-container-obj.h | 6 +++++
5 files changed, 57 insertions(+), 5 deletions(-)
diff --git a/hw/vfio/as.c b/hw/vfio/as.c
index 37423d2c89..30e86f6833 100644
--- a/hw/vfio/as.c
+++ b/hw/vfio/as.c
@@ -874,3 +874,39 @@ void vfio_put_address_space(VFIOAddressSpace *space)
g_free(space);
}
}
+
+static VFIOContainerClass *
+vfio_get_container_class(VFIOIOMMUBackendType be)
+{
+ ObjectClass *klass;
+
+ switch (be) {
+ case VFIO_IOMMU_BACKEND_TYPE_LEGACY:
+ klass = object_class_by_name(TYPE_VFIO_LEGACY_CONTAINER);
+ return VFIO_CONTAINER_OBJ_CLASS(klass);
+ default:
+ return NULL;
+ }
+}
+
+int vfio_attach_device(VFIODevice *vbasedev, AddressSpace *as, Error **errp)
+{
+ VFIOContainerClass *vccs;
+
+ vccs = vfio_get_container_class(VFIO_IOMMU_BACKEND_TYPE_LEGACY);
+ if (!vccs) {
+ return -ENOENT;
+ }
+ return vccs->attach_device(vbasedev, as, errp);
+}
+
+void vfio_detach_device(VFIODevice *vbasedev)
+{
+ VFIOContainerClass *vccs;
+
+ if (!vbasedev->container) {
+ return;
+ }
+ vccs = VFIO_CONTAINER_OBJ_GET_CLASS(vbasedev->container);
+ vccs->detach_device(vbasedev);
+}
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index 5d73f8285e..74febc1567 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -50,8 +50,6 @@
static int vfio_kvm_device_fd = -1;
#endif
-#define TYPE_VFIO_LEGACY_CONTAINER "qemu:vfio-legacy-container"
-
VFIOGroupList vfio_group_list =
QLIST_HEAD_INITIALIZER(vfio_group_list);
@@ -1240,7 +1238,8 @@ static int vfio_device_groupid(VFIODevice *vbasedev,
Error **errp)
return groupid;
}
-int vfio_attach_device(VFIODevice *vbasedev, AddressSpace *as, Error **errp)
+static int
+legacy_attach_device(VFIODevice *vbasedev, AddressSpace *as, Error **errp)
{
int groupid = vfio_device_groupid(vbasedev, errp);
VFIODevice *vbasedev_iter;
@@ -1269,14 +1268,16 @@ int vfio_attach_device(VFIODevice *vbasedev,
AddressSpace *as, Error **errp)
vfio_put_group(group);
return -1;
}
+ vbasedev->container = &group->container->obj;
return 0;
}
-void vfio_detach_device(VFIODevice *vbasedev)
+static void legacy_detach_device(VFIODevice *vbasedev)
{
vfio_put_base_device(vbasedev);
vfio_put_group(vbasedev->group);
+ vbasedev->container = NULL;
}
static void vfio_legacy_container_class_init(ObjectClass *klass,
@@ -1292,6 +1293,8 @@ static void vfio_legacy_container_class_init(ObjectClass
*klass,
vccs->add_window = vfio_legacy_container_add_section_window;
vccs->del_window = vfio_legacy_container_del_section_window;
vccs->check_extension = vfio_legacy_container_check_extension;
+ vccs->attach_device = legacy_attach_device;
+ vccs->detach_device = legacy_detach_device;
}
static const TypeInfo vfio_legacy_container_info = {
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 0363f81017..e1ab6d339d 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3063,7 +3063,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
}
if (!pdev->failover_pair_id &&
- vfio_container_check_extension(&vbasedev->group->container->obj,
+ vfio_container_check_extension(vbasedev->container,
VFIO_FEAT_LIVE_MIGRATION)) {
ret = vfio_migration_probe(vbasedev, errp);
if (ret) {
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 7d7898717e..2040c27cda 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -83,9 +83,15 @@ typedef struct VFIOLegacyContainer {
typedef struct VFIODeviceOps VFIODeviceOps;
+typedef enum VFIOIOMMUBackendType {
+ VFIO_IOMMU_BACKEND_TYPE_LEGACY = 0,
+ VFIO_IOMMU_BACKEND_TYPE_IOMMUFD = 1,
+} VFIOIOMMUBackendType;
+
typedef struct VFIODevice {
QLIST_ENTRY(VFIODevice) next;
struct VFIOGroup *group;
+ VFIOContainer *container;
char *sysfsdev;
char *name;
DeviceState *dev;
@@ -97,6 +103,7 @@ typedef struct VFIODevice {
bool ram_block_discard_allowed;
bool enable_migration;
VFIODeviceOps *ops;
+ VFIOIOMMUBackendType be;
unsigned int num_irqs;
unsigned int num_regions;
unsigned int flags;
diff --git a/include/hw/vfio/vfio-container-obj.h
b/include/hw/vfio/vfio-container-obj.h
index 7ffbbb299f..ebc1340530 100644
--- a/include/hw/vfio/vfio-container-obj.h
+++ b/include/hw/vfio/vfio-container-obj.h
@@ -42,6 +42,8 @@
OBJECT_GET_CLASS(VFIOContainerClass, (obj), \
TYPE_VFIO_CONTAINER_OBJ)
+#define TYPE_VFIO_LEGACY_CONTAINER "qemu:vfio-legacy-container"
+
typedef enum VFIOContainerFeature {
VFIO_FEAT_LIVE_MIGRATION,
} VFIOContainerFeature;
@@ -101,6 +103,8 @@ struct VFIOContainer {
QLIST_ENTRY(VFIOContainer) next;
};
+typedef struct VFIODevice VFIODevice;
+
typedef struct VFIOContainerClass {
/* private */
ObjectClass parent_class;
@@ -126,6 +130,8 @@ typedef struct VFIOContainerClass {
Error **errp);
void (*del_window)(VFIOContainer *container,
MemoryRegionSection *section);
+ int (*attach_device)(VFIODevice *vbasedev, AddressSpace *as, Error **errp);
+ void (*detach_device)(VFIODevice *vbasedev);
} VFIOContainerClass;
bool vfio_container_check_extension(VFIOContainer *container,
--
2.27.0
- [RFC 02/18] linux-headers: Import latest vfio.h and iommufd.h, (continued)
- [RFC 02/18] linux-headers: Import latest vfio.h and iommufd.h, Yi Liu, 2022/04/14
- [RFC 04/18] vfio/pci: Use vbasedev local variable in vfio_realize(), Yi Liu, 2022/04/14
- [RFC 05/18] vfio/common: Rename VFIOGuestIOMMU::iommu into ::iommu_mr, Yi Liu, 2022/04/14
- [RFC 08/18] vfio/container: Introduce vfio_[attach/detach]_device, Yi Liu, 2022/04/14
- [RFC 06/18] vfio/common: Split common.c into common.c, container.c and as.c, Yi Liu, 2022/04/14
- [RFC 09/18] vfio/platform: Use vfio_[attach/detach]_device, Yi Liu, 2022/04/14
- [RFC 10/18] vfio/ap: Use vfio_[attach/detach]_device, Yi Liu, 2022/04/14
- [RFC 07/18] vfio: Add base object for VFIOContainer, Yi Liu, 2022/04/14
- [RFC 11/18] vfio/ccw: Use vfio_[attach/detach]_device, Yi Liu, 2022/04/14
- [RFC 13/18] vfio/container-obj: Introduce VFIOContainer reset callback, Yi Liu, 2022/04/14
- [RFC 12/18] vfio/container-obj: Introduce [attach/detach]_device container callbacks,
Yi Liu <=
- [RFC 14/18] hw/iommufd: Creation, Yi Liu, 2022/04/14
- [RFC 15/18] vfio/iommufd: Implement iommufd backend, Yi Liu, 2022/04/14
- Re: [RFC 15/18] vfio/iommufd: Implement iommufd backend, Jason Gunthorpe, 2022/04/22
- Re: [RFC 15/18] vfio/iommufd: Implement iommufd backend, Alex Williamson, 2022/04/22
- Re: [RFC 15/18] vfio/iommufd: Implement iommufd backend, Yi Liu, 2022/04/26
- RE: [RFC 15/18] vfio/iommufd: Implement iommufd backend, Tian, Kevin, 2022/04/26
- Re: [RFC 15/18] vfio/iommufd: Implement iommufd backend, Jason Gunthorpe, 2022/04/26
- Re: [RFC 15/18] vfio/iommufd: Implement iommufd backend, Yi Liu, 2022/04/26
- Re: [RFC 15/18] vfio/iommufd: Implement iommufd backend, Jason Gunthorpe, 2022/04/26
- Re: [RFC 15/18] vfio/iommufd: Implement iommufd backend, Alex Williamson, 2022/04/26