+ if (dev->nr_guest_pages == dev->max_guest_pages) {
+ dev->max_guest_pages *= 2;
+ dev->guest_pages = realloc(dev->guest_pages,
+ dev->max_guest_pages * sizeof(*page));
+ }
+
+ if (dev->nr_guest_pages > 0) {
+ last_page = &dev->guest_pages[dev->nr_guest_pages - 1];
+ /* merge if the two pages are continuous */
+ if (host_phys_addr == last_page->host_phys_addr +
+ last_page->size) {
+ last_page->size += size;
+ return;
+ }
+ }
+
+ page = &dev->guest_pages[dev->nr_guest_pages++];
+ page->guest_phys_addr = guest_phys_addr;
+ page->host_phys_addr = host_phys_addr;
+ page->size = size;
+}
+
+static void
+add_guest_pages(struct virtio_net *dev, struct virtio_memory_region *reg,
+ uint64_t page_size)
+{
+ uint64_t reg_size = reg->size;
+ uint64_t host_user_addr = reg->host_user_addr;
+ uint64_t guest_phys_addr = reg->guest_phys_addr;
+ uint64_t host_phys_addr;
+ uint64_t size;
+
+ host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)host_user_addr);
+ size = page_size - (guest_phys_addr & (page_size - 1));
+ size = RTE_MIN(size, reg_size);
+
+ add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
+ host_user_addr += size;
+ guest_phys_addr += size;
+ reg_size -= size;
+
+ while (reg_size > 0) {
+ size = RTE_MIN(reg_size, page_size);
+ host_phys_addr = rte_mem_virt2phy((void *)(uintptr_t)
+ host_user_addr);
+ add_one_guest_page(dev, guest_phys_addr, host_phys_addr, size);
+
+ host_user_addr += size;
+ guest_phys_addr += size;
+ reg_size -= size;
+ }
+}
+
+#ifdef RTE_LIBRTE_VHOST_DEBUG
+/* TODO: enable it only in debug mode? */
+static void
+dump_guest_pages(struct virtio_net *dev)
+{
+ uint32_t i;
+ struct guest_page *page;
+
+ for (i = 0; i < dev->nr_guest_pages; i++) {
+ page = &dev->guest_pages[i];
+
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "guest physical page region %u\n"
+ "\t guest_phys_addr: %" PRIx64 "\n"
+ "\t host_phys_addr : %" PRIx64 "\n"
+ "\t size : %" PRIx64 "\n",
+ i,
+ page->guest_phys_addr,
+ page->host_phys_addr,
+ page->size);
+ }