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qemu-kvm/kvm-vfio-iommufd-Introduce-...

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From f98defd6fe081bc44f5bd823d187d7d3b12832ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
Date: Tue, 19 Dec 2023 07:58:23 +0100
Subject: [PATCH 056/101] vfio/iommufd: Introduce a VFIOIOMMU iommufd QOM
interface
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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: [55/67] 789ecf74ace326b0df5d494fd558d7d0b6294a85 (eauger1/centos-qemu-kvm)
As previously done for the sPAPR and legacy IOMMU backends, convert
the VFIOIOMMUOps struct to a QOM interface. The set of of operations
for this backend can be referenced with a literal typename instead of
a C struct.
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 ce5f6d49f5845c3b9955cc377a5223c3f8d7ba1e)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
hw/vfio/common.c | 2 +-
hw/vfio/iommufd.c | 35 ++++++++++++++++++++-------
include/hw/vfio/vfio-common.h | 1 -
include/hw/vfio/vfio-container-base.h | 2 +-
4 files changed, 28 insertions(+), 12 deletions(-)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 2329d0efc8..89ff1c7aed 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1508,7 +1508,7 @@ int vfio_attach_device(char *name, VFIODevice *vbasedev,
#ifdef CONFIG_IOMMUFD
if (vbasedev->iommufd) {
- ops = &vfio_iommufd_ops;
+ ops = VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_IOMMUFD));
}
#endif
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index 87a561c545..d4c586e842 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -319,6 +319,8 @@ static int iommufd_cdev_attach(const char *name, VFIODevice *vbasedev,
int ret, devfd;
uint32_t ioas_id;
Error *err = NULL;
+ const VFIOIOMMUClass *iommufd_vioc =
+ VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_IOMMUFD));
if (vbasedev->fd < 0) {
devfd = iommufd_cdev_getfd(vbasedev->sysfsdev, errp);
@@ -340,7 +342,7 @@ static int iommufd_cdev_attach(const char *name, VFIODevice *vbasedev,
/* try to attach to an existing container in this space */
QLIST_FOREACH(bcontainer, &space->containers, next) {
container = container_of(bcontainer, VFIOIOMMUFDContainer, bcontainer);
- if (bcontainer->ops != &vfio_iommufd_ops ||
+ if (bcontainer->ops != iommufd_vioc ||
vbasedev->iommufd != container->be) {
continue;
}
@@ -374,7 +376,7 @@ static int iommufd_cdev_attach(const char *name, VFIODevice *vbasedev,
container->ioas_id = ioas_id;
bcontainer = &container->bcontainer;
- vfio_container_init(bcontainer, space, &vfio_iommufd_ops);
+ vfio_container_init(bcontainer, space, iommufd_vioc);
QLIST_INSERT_HEAD(&space->containers, bcontainer, next);
ret = iommufd_cdev_attach_container(vbasedev, container, errp);
@@ -476,9 +478,11 @@ static void iommufd_cdev_detach(VFIODevice *vbasedev)
static VFIODevice *iommufd_cdev_pci_find_by_devid(__u32 devid)
{
VFIODevice *vbasedev_iter;
+ const VFIOIOMMUClass *iommufd_vioc =
+ VFIO_IOMMU_CLASS(object_class_by_name(TYPE_VFIO_IOMMU_IOMMUFD));
QLIST_FOREACH(vbasedev_iter, &vfio_device_list, global_next) {
- if (vbasedev_iter->bcontainer->ops != &vfio_iommufd_ops) {
+ if (vbasedev_iter->bcontainer->ops != iommufd_vioc) {
continue;
}
if (devid == vbasedev_iter->devid) {
@@ -621,10 +625,23 @@ out_single:
return ret;
}
-const VFIOIOMMUOps vfio_iommufd_ops = {
- .dma_map = iommufd_cdev_map,
- .dma_unmap = iommufd_cdev_unmap,
- .attach_device = iommufd_cdev_attach,
- .detach_device = iommufd_cdev_detach,
- .pci_hot_reset = iommufd_cdev_pci_hot_reset,
+static void vfio_iommu_iommufd_class_init(ObjectClass *klass, void *data)
+{
+ VFIOIOMMUClass *vioc = VFIO_IOMMU_CLASS(klass);
+
+ vioc->dma_map = iommufd_cdev_map;
+ vioc->dma_unmap = iommufd_cdev_unmap;
+ vioc->attach_device = iommufd_cdev_attach;
+ vioc->detach_device = iommufd_cdev_detach;
+ vioc->pci_hot_reset = iommufd_cdev_pci_hot_reset;
};
+
+static const TypeInfo types[] = {
+ {
+ .name = TYPE_VFIO_IOMMU_IOMMUFD,
+ .parent = TYPE_VFIO_IOMMU,
+ .class_init = vfio_iommu_iommufd_class_init,
+ },
+};
+
+DEFINE_TYPES(types)
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 14c497b6b0..9b7ef7d02b 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -210,7 +210,6 @@ typedef QLIST_HEAD(VFIOGroupList, VFIOGroup) VFIOGroupList;
typedef QLIST_HEAD(VFIODeviceList, VFIODevice) VFIODeviceList;
extern VFIOGroupList vfio_group_list;
extern VFIODeviceList vfio_device_list;
-extern const VFIOIOMMUOps vfio_iommufd_ops;
extern const MemoryListener vfio_memory_listener;
extern int vfio_kvm_device_fd;
diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
index 9e21d7811f..b2813b0c11 100644
--- a/include/hw/vfio/vfio-container-base.h
+++ b/include/hw/vfio/vfio-container-base.h
@@ -17,7 +17,6 @@
typedef struct VFIODevice VFIODevice;
typedef struct VFIOIOMMUClass VFIOIOMMUClass;
-#define VFIOIOMMUOps VFIOIOMMUClass /* To remove */
typedef struct {
unsigned long *bitmap;
@@ -96,6 +95,7 @@ void vfio_container_destroy(VFIOContainerBase *bcontainer);
#define TYPE_VFIO_IOMMU "vfio-iommu"
#define TYPE_VFIO_IOMMU_LEGACY TYPE_VFIO_IOMMU "-legacy"
#define TYPE_VFIO_IOMMU_SPAPR TYPE_VFIO_IOMMU "-spapr"
+#define TYPE_VFIO_IOMMU_IOMMUFD TYPE_VFIO_IOMMU "-iommufd"
/*
* VFIOContainerBase is not an abstract QOM object because it felt
--
2.39.3
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