Merge tag 'pull-vfio-20231219' of https://github.com/legoater/qemu into staging

vfio queue:

* Introduce an IOMMU interface backend for VFIO devices
* Convert IOMMU type1 and sPAPR IOMMU to respective backends
* Introduce a new IOMMUFD backend for ARM, x86_64 and s390x platforms

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* tag 'pull-vfio-20231219' of https://github.com/legoater/qemu: (47 commits)
  hw/ppc/Kconfig: Imply VFIO_PCI
  docs/devel: Add VFIO iommufd backend documentation
  vfio: Introduce a helper function to initialize VFIODevice
  vfio/ccw: Move VFIODevice initializations in vfio_ccw_instance_init
  vfio/ap: Move VFIODevice initializations in vfio_ap_instance_init
  vfio/platform: Move VFIODevice initializations in vfio_platform_instance_init
  vfio/pci: Move VFIODevice initializations in vfio_instance_init
  hw/i386: Activate IOMMUFD for q35 machines
  kconfig: Activate IOMMUFD for s390x machines
  hw/arm: Activate IOMMUFD for virt machines
  vfio: Make VFIOContainerBase poiner parameter const in VFIOIOMMUOps callbacks
  vfio/ccw: Make vfio cdev pre-openable by passing a file handle
  vfio/ccw: Allow the selection of a given iommu backend
  vfio/ap: Make vfio cdev pre-openable by passing a file handle
  vfio/ap: Allow the selection of a given iommu backend
  vfio/platform: Make vfio cdev pre-openable by passing a file handle
  vfio/platform: Allow the selection of a given iommu backend
  vfio/pci: Make vfio cdev pre-openable by passing a file handle
  vfio/pci: Allow the selection of a given iommu backend
  vfio/iommufd: Enable pci hot reset through iommufd cdev interface
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 121 insertions, 0 deletions

diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
new file mode 100644
index 0000000000..2ae297ccda
--- /dev/null
+++ b/include/hw/vfio/vfio-container-base.h
@@ -0,0 +1,121 @@
+/*
+ * VFIO BASE CONTAINER
+ *
+ * Copyright (C) 2023 Intel Corporation.
+ * Copyright Red Hat, Inc. 2023
+ *
+ * Authors: Yi Liu <yi.l.liu@intel.com>
+ *          Eric Auger <eric.auger@redhat.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_VFIO_VFIO_CONTAINER_BASE_H
+#define HW_VFIO_VFIO_CONTAINER_BASE_H
+
+#include "exec/memory.h"
+
+typedef struct VFIODevice VFIODevice;
+typedef struct VFIOIOMMUOps VFIOIOMMUOps;
+
+typedef struct {
+    unsigned long *bitmap;
+    hwaddr size;
+    hwaddr pages;
+} VFIOBitmap;
+
+typedef struct VFIOAddressSpace {
+    AddressSpace *as;
+    QLIST_HEAD(, VFIOContainerBase) containers;
+    QLIST_ENTRY(VFIOAddressSpace) list;
+} VFIOAddressSpace;
+
+/*
+ * This is the base object for vfio container backends
+ */
+typedef struct VFIOContainerBase {
+    const VFIOIOMMUOps *ops;
+    VFIOAddressSpace *space;
+    MemoryListener listener;
+    Error *error;
+    bool initialized;
+    uint64_t dirty_pgsizes;
+    uint64_t max_dirty_bitmap_size;
+    unsigned long pgsizes;
+    unsigned int dma_max_mappings;
+    bool dirty_pages_supported;
+    QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
+    QLIST_HEAD(, VFIORamDiscardListener) vrdl_list;
+    QLIST_ENTRY(VFIOContainerBase) next;
+    QLIST_HEAD(, VFIODevice) device_list;
+    GList *iova_ranges;
+} VFIOContainerBase;
+
+typedef struct VFIOGuestIOMMU {
+    VFIOContainerBase *bcontainer;
+    IOMMUMemoryRegion *iommu_mr;
+    hwaddr iommu_offset;
+    IOMMUNotifier n;
+    QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
+} VFIOGuestIOMMU;
+
+typedef struct VFIORamDiscardListener {
+    VFIOContainerBase *bcontainer;
+    MemoryRegion *mr;
+    hwaddr offset_within_address_space;
+    hwaddr size;
+    uint64_t granularity;
+    RamDiscardListener listener;
+    QLIST_ENTRY(VFIORamDiscardListener) next;
+} VFIORamDiscardListener;
+
+int vfio_container_dma_map(VFIOContainerBase *bcontainer,
+                           hwaddr iova, ram_addr_t size,
+                           void *vaddr, bool readonly);
+int vfio_container_dma_unmap(VFIOContainerBase *bcontainer,
+                             hwaddr iova, ram_addr_t size,
+                             IOMMUTLBEntry *iotlb);
+int vfio_container_add_section_window(VFIOContainerBase *bcontainer,
+                                      MemoryRegionSection *section,
+                                      Error **errp);
+void vfio_container_del_section_window(VFIOContainerBase *bcontainer,
+                                       MemoryRegionSection *section);
+int vfio_container_set_dirty_page_tracking(VFIOContainerBase *bcontainer,
+                                           bool start);
+int vfio_container_query_dirty_bitmap(const VFIOContainerBase *bcontainer,
+                                      VFIOBitmap *vbmap,
+                                      hwaddr iova, hwaddr size);
+
+void vfio_container_init(VFIOContainerBase *bcontainer,
+                         VFIOAddressSpace *space,
+                         const VFIOIOMMUOps *ops);
+void vfio_container_destroy(VFIOContainerBase *bcontainer);
+
+struct VFIOIOMMUOps {
+    /* basic feature */
+    int (*dma_map)(const VFIOContainerBase *bcontainer,
+                   hwaddr iova, ram_addr_t size,
+                   void *vaddr, bool readonly);
+    int (*dma_unmap)(const VFIOContainerBase *bcontainer,
+                     hwaddr iova, ram_addr_t size,
+                     IOMMUTLBEntry *iotlb);
+    int (*attach_device)(const char *name, VFIODevice *vbasedev,
+                         AddressSpace *as, Error **errp);
+    void (*detach_device)(VFIODevice *vbasedev);
+    /* migration feature */
+    int (*set_dirty_page_tracking)(const VFIOContainerBase *bcontainer,
+                                   bool start);
+    int (*query_dirty_bitmap)(const VFIOContainerBase *bcontainer,
+                              VFIOBitmap *vbmap,
+                              hwaddr iova, hwaddr size);
+    /* PCI specific */
+    int (*pci_hot_reset)(VFIODevice *vbasedev, bool single);
+
+    /* SPAPR specific */
+    int (*add_window)(VFIOContainerBase *bcontainer,
+                      MemoryRegionSection *section,
+                      Error **errp);
+    void (*del_window)(VFIOContainerBase *bcontainer,
+                       MemoryRegionSection *section);
+};
+#endif /* HW_VFIO_VFIO_CONTAINER_BASE_H */