Re: [Xen-devel] [PATCH v3 2/2] libxl: save/restore qemu's physmap

[Shriram Rajagopalan <rshriram@xxxxxxxxx>]

On Mon, Jan 30, 2012 at 8:54 AM, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> wrote:

+
+static int libxl__toolstack_restore(uint32_t domid, uint8_t *buf,
+        uint32_t size, void *data)
+{
+    libxl__gc *gc = (libxl__gc *) data;
+    int i, ret;
+    uint8_t *ptr = buf;
+    uint32_t count = 0, version = 0;
+    struct libxl__physmap_info* pi;
+
+    if (size < sizeof(version) + sizeof(count))
+        return -1;
+
+    memcpy(&version, ptr, sizeof(version));
+    ptr += sizeof(version);
+
+    if (version != TOOLSTACK_SAVE_VERSION)
+        return -1;
+
+    memcpy(&count, ptr, sizeof(count));
+    ptr += sizeof(count);
+
+    if (size < sizeof(version) + sizeof(count) +
+            count * (sizeof(struct libxl__physmap_info)))
+        return -1;
+
+    for (i = 0; i < count; i++) {
+        pi = (struct libxl__physmap_info*) ptr;
+        ptr += sizeof(struct libxl__physmap_info) + pi->namelen;
+
+        ret = libxl__xs_write(gc, 0, libxl__sprintf(gc,
+                    "/local/domain/0/device-model/%d/physmap/%"PRIx64"/start_addr",
+                    domid, pi->phys_offset), "%"PRIx64, pi->start_addr);
+        if (ret)
+            return -1;
+        ret = libxl__xs_write(gc, 0, libxl__sprintf(gc,
+                    "/local/domain/0/device-model/%d/physmap/%"PRIx64"/size",
+                    domid, pi->phys_offset), "%"PRIx64, pi->size);
+        if (ret)
+            return -1;
+        if (pi->namelen > 0) {
+            ret = libxl__xs_write(gc, 0, libxl__sprintf(gc,
+                        "/local/domain/0/device-model/%d/physmap/%"PRIx64"/name",
+                        domid, pi->phys_offset), "%s", pi->name);
+            if (ret)
+                return -1;
+        }
+    }
+    return 0;
+}
+

Sorry if this sounds silly. Is the save/restore of Qemu Physmap equivalent to
save/restore of the Qemu Device Model ?
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