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[Qemu-arm] [RFC v4 09/16] virtio-iommu: Implement translate
From: |
Eric Auger |
Subject: |
[Qemu-arm] [RFC v4 09/16] virtio-iommu: Implement translate |
Date: |
Tue, 19 Sep 2017 09:46:41 +0200 |
This patch implements the translate callback
Signed-off-by: Eric Auger <address@hidden>
---
hw/virtio/trace-events | 1 +
hw/virtio/virtio-iommu.c | 39 +++++++++++++++++++++++++++++++++++++--
2 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index da298c1..9010fbd 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -45,3 +45,4 @@ virtio_iommu_put_as(uint32_t asid) "Free asid=%d"
virtio_iommu_unmap_left_interval(uint64_t low, uint64_t high, uint64_t
next_low, uint64_t next_high) "Unmap left [0x%"PRIx64",0x%"PRIx64"], new
interval=[0x%"PRIx64",0x%"PRIx64"]"
virtio_iommu_unmap_right_interval(uint64_t low, uint64_t high, uint64_t
next_low, uint64_t next_high) "Unmap right [0x%"PRIx64",0x%"PRIx64"], new
interval=[0x%"PRIx64",0x%"PRIx64"]"
virtio_iommu_unmap_inc_interval(uint64_t low, uint64_t high) "Unmap inc
[0x%"PRIx64",0x%"PRIx64"]"
+virtio_iommu_translate_out(uint64_t virt_addr, uint64_t phys_addr, uint32_t
sid) "0x%"PRIx64" -> 0x%"PRIx64 " for sid=%d"
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 6f1a7d1..db46a91 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -496,19 +496,54 @@ static IOMMUTLBEntry
virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
IOMMUAccessFlags flag)
{
IOMMUDevice *sdev = container_of(mr, IOMMUDevice, iommu_mr);
+ VirtIOIOMMU *s = sdev->viommu;
uint32_t sid;
+ viommu_dev *dev;
+ viommu_mapping *mapping;
+ viommu_interval interval;
+
+ interval.low = addr;
+ interval.high = addr + 1;
IOMMUTLBEntry entry = {
.target_as = &address_space_memory,
.iova = addr,
.translated_addr = addr,
- .addr_mask = ~(hwaddr)0,
- .perm = IOMMU_NONE,
+ .addr_mask = (1 << ctz32(s->config.page_size_mask)) - 1,
+ .perm = flag,
};
sid = virtio_iommu_get_sid(sdev);
trace_virtio_iommu_translate(mr->parent_obj.name, sid, addr, flag);
+ qemu_mutex_lock(&s->mutex);
+
+ dev = g_tree_lookup(s->devices, GUINT_TO_POINTER(sid));
+ if (!dev) {
+ /* device cannot be attached to another as */
+ printf("%s sid=%d is not known!!\n", __func__, sid);
+ goto unlock;
+ }
+
+ mapping = g_tree_lookup(dev->as->mappings, (gpointer)(&interval));
+ if (!mapping) {
+ printf("%s no mapping for 0x%"PRIx64" for sid=%d\n", __func__,
+ addr, sid);
+ goto unlock;
+ }
+
+ if (((flag & IOMMU_RO) && !(mapping->flags & VIRTIO_IOMMU_MAP_F_READ)) ||
+ ((flag & IOMMU_WO) && !(mapping->flags & VIRTIO_IOMMU_MAP_F_WRITE))) {
+ error_report("Permission error on 0x%"PRIx64"(%d): allowed=%d",
+ addr, flag, mapping->flags);
+ entry.perm = IOMMU_NONE;
+ goto unlock;
+ }
+ entry.translated_addr = addr - mapping->virt_addr + mapping->phys_addr,
+ trace_virtio_iommu_translate_out(addr, entry.translated_addr, sid);
+
+unlock:
+ qemu_mutex_unlock(&s->mutex);
return entry;
}
--
2.5.5
- [Qemu-arm] [RFC v4 00/16] VIRTIO-IOMMU device, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 01/16] update-linux-headers: import virtio_iommu.h, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 02/16] linux-headers: Update for virtio-iommu, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 03/16] virtio-iommu: add skeleton, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 04/16] virtio-iommu: Decode the command payload, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 05/16] virtio-iommu: Add the iommu regions, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 06/16] virtio-iommu: Register attached devices, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 07/16] virtio-iommu: Implement attach/detach command, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 08/16] virtio-iommu: Implement map/unmap, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 09/16] virtio-iommu: Implement translate,
Eric Auger <=
- [Qemu-arm] [RFC v4 10/16] virtio-iommu: Implement probe request, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 11/16] hw/arm/virt: Add 2.11 machine type, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 12/16] hw/arm/virt: Add virtio-iommu to the virt board, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 13/16] memory.h: Add set_page_size_mask IOMMUMemoryRegion callback, Eric Auger, 2017/09/19
- [Qemu-arm] [RFC v4 15/16] virtio-iommu: Implement set_page_size_mask, Eric Auger, 2017/09/19