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backends/iommufd: Introduce TYPE_HOST_IOMMU_DEVICE_IOMMUFD[_VFIO] devices 

TYPE_HOST_IOMMU_DEVICE_IOMMUFD represents a host IOMMU device under
iommufd backend. It is abstract, because it is going to be derived
into VFIO or VDPA type'd device.

It will have its own .get_cap() implementation.

TYPE_HOST_IOMMU_DEVICE_IOMMUFD_VFIO is a sub-class of
TYPE_HOST_IOMMU_DEVICE_IOMMUFD, represents a VFIO type'd host IOMMU
device under iommufd backend. It will be created during VFIO device
attaching and passed to vIOMMU.

It will have its own .realize() implementation.

Opportunistically, add missed header to include/sysemu/iommufd.h.

Suggested-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhenzhong Duan 2024-06-05 16:30:30 +08:00 committed by Cédric Le Goater
parent 0533739ece
commit 9005f92844
4 changed files with 41 additions and 18 deletions
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35
backends/iommufd.c
View File

@ -208,23 +208,24 @@ int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
return ret;
}
static const TypeInfo iommufd_backend_info = {
.name = TYPE_IOMMUFD_BACKEND,
.parent = TYPE_OBJECT,
.instance_size = sizeof(IOMMUFDBackend),
.instance_init = iommufd_backend_init,
.instance_finalize = iommufd_backend_finalize,
.class_size = sizeof(IOMMUFDBackendClass),
.class_init = iommufd_backend_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
static const TypeInfo types[] = {
{
.name = TYPE_IOMMUFD_BACKEND,
.parent = TYPE_OBJECT,
.instance_size = sizeof(IOMMUFDBackend),
.instance_init = iommufd_backend_init,
.instance_finalize = iommufd_backend_finalize,
.class_size = sizeof(IOMMUFDBackendClass),
.class_init = iommufd_backend_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
}, {
.name = TYPE_HOST_IOMMU_DEVICE_IOMMUFD,
.parent = TYPE_HOST_IOMMU_DEVICE,
.abstract = true,
}
};
static void register_types(void)
{
type_register_static(&iommufd_backend_info);
}
type_init(register_types);
DEFINE_TYPES(types)

5
hw/vfio/iommufd.c
View File

@ -624,7 +624,10 @@ static const TypeInfo types[] = {
.name = TYPE_VFIO_IOMMU_IOMMUFD,
.parent = TYPE_VFIO_IOMMU,
.class_init = vfio_iommu_iommufd_class_init,
},
}, {
.name = TYPE_HOST_IOMMU_DEVICE_IOMMUFD_VFIO,
.parent = TYPE_HOST_IOMMU_DEVICE_IOMMUFD,
}
};
DEFINE_TYPES(types)

3
include/hw/vfio/vfio-common.h
View File

@ -32,6 +32,7 @@
#include "sysemu/sysemu.h"
#include "hw/vfio/vfio-container-base.h"
#include "sysemu/host_iommu_device.h"
#include "sysemu/iommufd.h"
#define VFIO_MSG_PREFIX "vfio %s: "
@ -173,6 +174,8 @@ typedef struct VFIOGroup {
} VFIOGroup;
#define TYPE_HOST_IOMMU_DEVICE_LEGACY_VFIO TYPE_HOST_IOMMU_DEVICE "-legacy-vfio"
#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD_VFIO \
TYPE_HOST_IOMMU_DEVICE_IOMMUFD "-vfio"
typedef struct VFIODMABuf {
QemuDmaBuf *buf;

16
include/sysemu/iommufd.h
View File

@ -1,9 +1,23 @@
/*
* iommufd container backend declaration
*
* Copyright (C) 2024 Intel Corporation.
* Copyright Red Hat, Inc. 2024
*
* Authors: Yi Liu <yi.l.liu@intel.com>
* Eric Auger <eric.auger@redhat.com>
* Zhenzhong Duan <zhenzhong.duan@intel.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef SYSEMU_IOMMUFD_H
#define SYSEMU_IOMMUFD_H
#include "qom/object.h"
#include "exec/hwaddr.h"
#include "exec/cpu-common.h"
#include "sysemu/host_iommu_device.h"
#define TYPE_IOMMUFD_BACKEND "iommufd"
OBJECT_DECLARE_TYPE(IOMMUFDBackend, IOMMUFDBackendClass, IOMMUFD_BACKEND)
@ -33,4 +47,6 @@ int iommufd_backend_map_dma(IOMMUFDBackend *be, uint32_t ioas_id, hwaddr iova,
ram_addr_t size, void *vaddr, bool readonly);
int iommufd_backend_unmap_dma(IOMMUFDBackend *be, uint32_t ioas_id,
hwaddr iova, ram_addr_t size);
#define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd"
#endif