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virtio-iommu: Implement translate 

This patch implements the translate callback

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>

Message-Id: <20200214132745.23392-6-eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
master
Eric Auger 2020-02-14 14:27:40 +01:00 committed by Michael S. Tsirkin
parent fe2cacae24
commit ed8449b30b
2 changed files with 60 additions and 1 deletions
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1
hw/virtio/trace-events
View File

@ -71,3 +71,4 @@ virtio_iommu_get_endpoint(uint32_t ep_id) "Alloc endpoint=%d"
virtio_iommu_put_endpoint(uint32_t ep_id) "Free endpoint=%d"
virtio_iommu_get_domain(uint32_t domain_id) "Alloc domain=%d"
virtio_iommu_put_domain(uint32_t domain_id) "Free domain=%d"
virtio_iommu_translate_out(uint64_t virt_addr, uint64_t phys_addr, uint32_t sid) "0x%"PRIx64" -> 0x%"PRIx64 " for sid=%d"

60
hw/virtio/virtio-iommu.c
View File

@ -473,19 +473,77 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
int iommu_idx)
{
IOMMUDevice *sdev = container_of(mr, IOMMUDevice, iommu_mr);
VirtIOIOMMUInterval interval, *mapping_key;
VirtIOIOMMUMapping *mapping_value;
VirtIOIOMMU *s = sdev->viommu;
VirtIOIOMMUEndpoint *ep;
bool bypass_allowed;
uint32_t sid;
bool found;
interval.low = addr;
interval.high = addr + 1;
IOMMUTLBEntry entry = {
.target_as = &address_space_memory,
.iova = addr,
.translated_addr = addr,
.addr_mask = ~(hwaddr)0,
.addr_mask = (1 << ctz32(s->config.page_size_mask)) - 1,
.perm = IOMMU_NONE,
};
bypass_allowed = virtio_vdev_has_feature(&s->parent_obj,
VIRTIO_IOMMU_F_BYPASS);
sid = virtio_iommu_get_bdf(sdev);
trace_virtio_iommu_translate(mr->parent_obj.name, sid, addr, flag);
qemu_mutex_lock(&s->mutex);
ep = g_tree_lookup(s->endpoints, GUINT_TO_POINTER(sid));
if (!ep) {
if (!bypass_allowed) {
error_report_once("%s sid=%d is not known!!", __func__, sid);
} else {
entry.perm = flag;
}
goto unlock;
}
if (!ep->domain) {
if (!bypass_allowed) {
error_report_once("%s %02x:%02x.%01x not attached to any domain",
__func__, PCI_BUS_NUM(sid),
PCI_SLOT(sid), PCI_FUNC(sid));
} else {
entry.perm = flag;
}
goto unlock;
}
found = g_tree_lookup_extended(ep->domain->mappings, (gpointer)(&interval),
(void **)&mapping_key,
(void **)&mapping_value);
if (!found) {
error_report_once("%s no mapping for 0x%"PRIx64" for sid=%d",
__func__, addr, sid);
goto unlock;
}
if (((flag & IOMMU_RO) &&
!(mapping_value->flags & VIRTIO_IOMMU_MAP_F_READ)) ||
((flag & IOMMU_WO) &&
!(mapping_value->flags & VIRTIO_IOMMU_MAP_F_WRITE))) {
error_report_once("%s permission error on 0x%"PRIx64"(%d): allowed=%d",
__func__, addr, flag, mapping_value->flags);
goto unlock;
}
entry.translated_addr = addr - mapping_key->low + mapping_value->phys_addr;
entry.perm = flag;
trace_virtio_iommu_translate_out(addr, entry.translated_addr, sid);
unlock:
qemu_mutex_unlock(&s->mutex);
return entry;
}