This patch extends VIRTIO_IOMMU_T_MAP/UNMAP request to
notify registered iommu-notifier. Which will call vfio
notifier to map/unmap region in iommu.
Signed-off-by: Bharat Bhushan <bbhush...@marvell.com>
Signed-off-by: Eric Auger <eric.au...@redhat.com>
---
hw/virtio/trace-events | 2 +
hw/virtio/virtio-iommu.c | 66 +++++++++++++++++++++++++++++++-
include/hw/virtio/virtio-iommu.h | 6 +++
3 files changed, 73 insertions(+), 1 deletion(-)
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index e83500bee9..d94a1cd8a3 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -73,3 +73,5 @@ 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"
virtio_iommu_report_fault(uint8_t reason, uint32_t flags, uint32_t endpoint,
uint64_t addr) "FAULT reason=%d flags=%d endpoint=%d address =0x%"PRIx64
+virtio_iommu_notify_map(const char *name, uint64_t iova, uint64_t paddr,
uint64_t map_size) "mr=%s iova=0x%"PRIx64" pa=0x%" PRIx64" size=0x%"PRIx64
+virtio_iommu_notify_unmap(const char *name, uint64_t iova, uint64_t map_size)
"mr=%s iova=0x%"PRIx64" size=0x%"PRIx64
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 4cee8083bc..e51344a53e 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -123,6 +123,38 @@ static gint interval_cmp(gconstpointer a, gconstpointer b,
gpointer user_data)
}
}
+static void virtio_iommu_notify_map(IOMMUMemoryRegion *mr, hwaddr iova,
+ hwaddr paddr, hwaddr size)
+{
+ IOMMUTLBEntry entry;
+
+ entry.target_as = &address_space_memory;
+ entry.addr_mask = size - 1;
+
+ entry.iova = iova;
+ trace_virtio_iommu_notify_map(mr->parent_obj.name, iova, paddr, size);
+ entry.perm = IOMMU_RW;
+ entry.translated_addr = paddr;
+
+ memory_region_notify_iommu(mr, 0, entry);
+}
+
+static void virtio_iommu_notify_unmap(IOMMUMemoryRegion *mr, hwaddr iova,
+ hwaddr size)
+{
+ IOMMUTLBEntry entry;
+
+ entry.target_as = &address_space_memory;
+ entry.addr_mask = size - 1;
+
+ entry.iova = iova;
+ trace_virtio_iommu_notify_unmap(mr->parent_obj.name, iova, size);
+ entry.perm = IOMMU_NONE;
+ entry.translated_addr = 0;
+
+ memory_region_notify_iommu(mr, 0, entry);
+}
+
static void virtio_iommu_detach_endpoint_from_domain(VirtIOIOMMUEndpoint *ep)
{
if (!ep->domain) {
@@ -307,9 +339,12 @@ static int virtio_iommu_map(VirtIOIOMMU *s,
uint64_t virt_start = le64_to_cpu(req->virt_start);
uint64_t virt_end = le64_to_cpu(req->virt_end);
uint32_t flags = le32_to_cpu(req->flags);
+ hwaddr size = virt_end - virt_start + 1;
+ VirtioIOMMUNotifierNode *node;
VirtIOIOMMUDomain *domain;
VirtIOIOMMUInterval *interval;
VirtIOIOMMUMapping *mapping;
+ VirtIOIOMMUEndpoint *ep;
if (flags & ~VIRTIO_IOMMU_MAP_F_MASK) {
return VIRTIO_IOMMU_S_INVAL;
@@ -339,9 +374,37 @@ static int virtio_iommu_map(VirtIOIOMMU *s,
g_tree_insert(domain->mappings, interval, mapping);
+ /* All devices in an address-space share mapping */
+ QLIST_FOREACH(node, &s->notifiers_list, next) {
+ QLIST_FOREACH(ep, &domain->endpoint_list, next) {
+ if (ep->id == node->iommu_dev->devfn) {
+ virtio_iommu_notify_map(&node->iommu_dev->iommu_mr,
+ virt_start, phys_start, size);
+ }
+ }
+ }
+
return VIRTIO_IOMMU_S_OK;
}
+static void virtio_iommu_remove_mapping(VirtIOIOMMU *s, VirtIOIOMMUDomain
*domain,
+ VirtIOIOMMUInterval *interval)
+{
+ VirtioIOMMUNotifierNode *node;
+ VirtIOIOMMUEndpoint *ep;
+
+ QLIST_FOREACH(node, &s->notifiers_list, next) {
+ QLIST_FOREACH(ep, &domain->endpoint_list, next) {
+ if (ep->id == node->iommu_dev->devfn) {
+ virtio_iommu_notify_unmap(&node->iommu_dev->iommu_mr,
+ interval->low,
+ interval->high - interval->low + 1);
+ }
+ }
+ }
+ g_tree_remove(domain->mappings, (gpointer)(interval));
+}
+
static int virtio_iommu_unmap(VirtIOIOMMU *s,
struct virtio_iommu_req_unmap *req)
{
@@ -368,7 +431,7 @@ static int virtio_iommu_unmap(VirtIOIOMMU *s,
uint64_t current_high = iter_key->high;
if (interval.low <= current_low && interval.high >= current_high) {
- g_tree_remove(domain->mappings, iter_key);
+ virtio_iommu_remove_mapping(s, domain, iter_key);
trace_virtio_iommu_unmap_done(domain_id, current_low,
current_high);
} else {
ret = VIRTIO_IOMMU_S_RANGE;
@@ -655,6 +718,7 @@ static void virtio_iommu_device_realize(DeviceState *dev,
Error **errp)
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOIOMMU *s = VIRTIO_IOMMU(dev);
+ QLIST_INIT(&s->notifiers_list);
virtio_init(vdev, "virtio-iommu", VIRTIO_ID_IOMMU,
sizeof(struct virtio_iommu_config));
diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h
index 6f67f1020a..4539c8ae72 100644
--- a/include/hw/virtio/virtio-iommu.h
+++ b/include/hw/virtio/virtio-iommu.h
@@ -44,6 +44,11 @@ typedef struct IOMMUPciBus {
IOMMUDevice *pbdev[0]; /* Parent array is sparse, so dynamically alloc */
} IOMMUPciBus;
+typedef struct VirtioIOMMUNotifierNode {
+ IOMMUDevice *iommu_dev;
+ QLIST_ENTRY(VirtioIOMMUNotifierNode) next;
+} VirtioIOMMUNotifierNode;
+
typedef struct VirtIOIOMMU {
VirtIODevice parent_obj;
VirtQueue *req_vq;
@@ -56,6 +61,7 @@ typedef struct VirtIOIOMMU {
GTree *domains;
QemuMutex mutex;
GTree *endpoints;
+ QLIST_HEAD(, VirtioIOMMUNotifierNode) notifiers_list;
} VirtIOIOMMU;
#endif
--
2.17.1
