[07/13] virtio-iommu: Implement set_iova_ranges() callback

Commit Message

Eric Auger Sept. 4, 2023, 8:03 a.m. UTC

The implementation populates the array of per IOMMUDevice
host reserved regions.

Signed-off-by: Eric Auger <[e-mail]>
---
 include/hw/virtio/virtio-iommu.h |  2 ++
 hw/virtio/virtio-iommu.c         | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)

Patch

diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h
index 70b8ace34d..31b69c8261 100644
--- a/include/hw/virtio/virtio-iommu.h
+++ b/include/hw/virtio/virtio-iommu.h
@@ -40,6 +40,8 @@  typedef struct IOMMUDevice {
     MemoryRegion root;          /* The root container of the device */
     MemoryRegion bypass_mr;     /* The alias of shared memory MR */
     GList *resv_regions;
+    Range *host_resv_regions;
+    uint32_t nr_host_resv_regions;
 } IOMMUDevice;
 
 typedef struct IOMMUPciBus {
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index ea359b586a..02f1a59d57 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -20,6 +20,7 @@ 
 #include "qemu/osdep.h"
 #include "qemu/log.h"
 #include "qemu/iov.h"
+#include "qemu/range.h"
 #include "exec/target_page.h"
 #include "hw/qdev-properties.h"
 #include "hw/virtio/virtio.h"
@@ -1158,6 +1159,21 @@  static int virtio_iommu_set_page_size_mask(IOMMUMemoryRegion *mr,
     return 0;
 }
 
+static int virtio_iommu_set_iova_ranges(IOMMUMemoryRegion *mr,
+                                        uint32_t nr_ranges,
+                                        struct Range *iova_ranges,
+                                        Error **errp)
+{
+    IOMMUDevice *sdev = container_of(mr, IOMMUDevice, iommu_mr);
+    assert(nr_ranges);
+
+
+    range_inverse_array(nr_ranges, iova_ranges,
+                        &sdev->nr_host_resv_regions, &sdev->host_resv_regions);
+
+    return 0;
+}
+
 static void virtio_iommu_system_reset(void *opaque)
 {
     VirtIOIOMMU *s = opaque;
@@ -1453,6 +1469,7 @@  static void virtio_iommu_memory_region_class_init(ObjectClass *klass,
     imrc->replay = virtio_iommu_replay;
     imrc->notify_flag_changed = virtio_iommu_notify_flag_changed;
     imrc->iommu_set_page_size_mask = virtio_iommu_set_page_size_mask;
+    imrc->iommu_set_iova_ranges = virtio_iommu_set_iova_ranges;
 }
 
 static const TypeInfo virtio_iommu_info = {