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, 101 insertions, 0 deletions

diff --git a/hw/vfio/container-base.c b/hw/vfio/container-base.c
new file mode 100644
index 0000000000..1ffd25bbfa
--- /dev/null
+++ b/hw/vfio/container-base.c
@@ -0,0 +1,101 @@
+/*
+ * 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
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "hw/vfio/vfio-container-base.h"
+
+int vfio_container_dma_map(VFIOContainerBase *bcontainer,
+                           hwaddr iova, ram_addr_t size,
+                           void *vaddr, bool readonly)
+{
+    g_assert(bcontainer->ops->dma_map);
+    return bcontainer->ops->dma_map(bcontainer, iova, size, vaddr, readonly);
+}
+
+int vfio_container_dma_unmap(VFIOContainerBase *bcontainer,
+                             hwaddr iova, ram_addr_t size,
+                             IOMMUTLBEntry *iotlb)
+{
+    g_assert(bcontainer->ops->dma_unmap);
+    return bcontainer->ops->dma_unmap(bcontainer, iova, size, iotlb);
+}
+
+int vfio_container_add_section_window(VFIOContainerBase *bcontainer,
+                                      MemoryRegionSection *section,
+                                      Error **errp)
+{
+    if (!bcontainer->ops->add_window) {
+        return 0;
+    }
+
+    return bcontainer->ops->add_window(bcontainer, section, errp);
+}
+
+void vfio_container_del_section_window(VFIOContainerBase *bcontainer,
+                                       MemoryRegionSection *section)
+{
+    if (!bcontainer->ops->del_window) {
+        return;
+    }
+
+    return bcontainer->ops->del_window(bcontainer, section);
+}
+
+int vfio_container_set_dirty_page_tracking(VFIOContainerBase *bcontainer,
+                                           bool start)
+{
+    if (!bcontainer->dirty_pages_supported) {
+        return 0;
+    }
+
+    g_assert(bcontainer->ops->set_dirty_page_tracking);
+    return bcontainer->ops->set_dirty_page_tracking(bcontainer, start);
+}
+
+int vfio_container_query_dirty_bitmap(const VFIOContainerBase *bcontainer,
+                                      VFIOBitmap *vbmap,
+                                      hwaddr iova, hwaddr size)
+{
+    g_assert(bcontainer->ops->query_dirty_bitmap);
+    return bcontainer->ops->query_dirty_bitmap(bcontainer, vbmap, iova, size);
+}
+
+void vfio_container_init(VFIOContainerBase *bcontainer, VFIOAddressSpace *space,
+                         const VFIOIOMMUOps *ops)
+{
+    bcontainer->ops = ops;
+    bcontainer->space = space;
+    bcontainer->error = NULL;
+    bcontainer->dirty_pages_supported = false;
+    bcontainer->dma_max_mappings = 0;
+    bcontainer->iova_ranges = NULL;
+    QLIST_INIT(&bcontainer->giommu_list);
+    QLIST_INIT(&bcontainer->vrdl_list);
+}
+
+void vfio_container_destroy(VFIOContainerBase *bcontainer)
+{
+    VFIOGuestIOMMU *giommu, *tmp;
+
+    QLIST_REMOVE(bcontainer, next);
+
+    QLIST_FOREACH_SAFE(giommu, &bcontainer->giommu_list, giommu_next, tmp) {
+        memory_region_unregister_iommu_notifier(
+                MEMORY_REGION(giommu->iommu_mr), &giommu->n);
+        QLIST_REMOVE(giommu, giommu_next);
+        g_free(giommu);
+    }
+
+    g_list_free_full(bcontainer->iova_ranges, g_free);
+}