hw/xen: Use XEN_PAGE_SIZE in PV backend drivers

XC_PAGE_SIZE comes from the actual Xen libraries, while XEN_PAGE_SIZE is
provided by QEMU itself in xen_backend_ops.h. For backends which may be
built for emulation mode, use the latter.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>

hw/block/dataplane/xen-block.c

@@ -101,9 +101,9 @@ static XenBlockRequest *xen_block_start_request(XenBlockDataPlane *dataplane)
          * re-use requests, allocate the memory once here. It will be freed
          * xen_block_dataplane_destroy() when the request list is freed.
          */
-        request->buf = qemu_memalign(XC_PAGE_SIZE,
+        request->buf = qemu_memalign(XEN_PAGE_SIZE,
                                      BLKIF_MAX_SEGMENTS_PER_REQUEST *
-                                     XC_PAGE_SIZE);
+                                     XEN_PAGE_SIZE);
         dataplane->requests_total++;
         qemu_iovec_init(&request->v, 1);
     } else {
@@ -185,7 +185,7 @@ static int xen_block_parse_request(XenBlockRequest *request)
             goto err;
         }
         if (request->req.seg[i].last_sect * dataplane->sector_size >=
-            XC_PAGE_SIZE) {
+            XEN_PAGE_SIZE) {
             error_report("error: page crossing");
             goto err;
         }
@@ -740,7 +740,7 @@ void xen_block_dataplane_start(XenBlockDataPlane *dataplane,
 
     dataplane->protocol = protocol;
 
-    ring_size = XC_PAGE_SIZE * dataplane->nr_ring_ref;
+    ring_size = XEN_PAGE_SIZE * dataplane->nr_ring_ref;
     switch (dataplane->protocol) {
     case BLKIF_PROTOCOL_NATIVE:
     {

hw/display/xenfb.c

@@ -489,13 +489,13 @@ static int xenfb_map_fb(struct XenFB *xenfb)
     }
 
     if (xenfb->pixels) {
-        munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
+        munmap(xenfb->pixels, xenfb->fbpages * XEN_PAGE_SIZE);
         xenfb->pixels = NULL;
     }
 
-    xenfb->fbpages = DIV_ROUND_UP(xenfb->fb_len, XC_PAGE_SIZE);
+    xenfb->fbpages = DIV_ROUND_UP(xenfb->fb_len, XEN_PAGE_SIZE);
     n_fbdirs = xenfb->fbpages * mode / 8;
-    n_fbdirs = DIV_ROUND_UP(n_fbdirs, XC_PAGE_SIZE);
+    n_fbdirs = DIV_ROUND_UP(n_fbdirs, XEN_PAGE_SIZE);
 
     pgmfns = g_new0(xen_pfn_t, n_fbdirs);
     fbmfns = g_new0(xen_pfn_t, xenfb->fbpages);
@@ -528,8 +528,8 @@ static int xenfb_configure_fb(struct XenFB *xenfb, size_t fb_len_lim,
 {
     size_t mfn_sz = sizeof_field(struct xenfb_page, pd[0]);
     size_t pd_len = sizeof_field(struct xenfb_page, pd) / mfn_sz;
-    size_t fb_pages = pd_len * XC_PAGE_SIZE / mfn_sz;
-    size_t fb_len_max = fb_pages * XC_PAGE_SIZE;
+    size_t fb_pages = pd_len * XEN_PAGE_SIZE / mfn_sz;
+    size_t fb_len_max = fb_pages * XEN_PAGE_SIZE;
     int max_width, max_height;
 
     if (fb_len_lim > fb_len_max) {
@@ -930,7 +930,7 @@ static void fb_disconnect(struct XenLegacyDevice *xendev)
      *   instead.  This releases the guest pages and keeps qemu happy.
      */
     qemu_xen_foreignmem_unmap(fb->pixels, fb->fbpages);
-    fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE,
+    fb->pixels = mmap(fb->pixels, fb->fbpages * XEN_PAGE_SIZE,
                       PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON,
                       -1, 0);
     if (fb->pixels == MAP_FAILED) {

hw/net/xen_nic.c

@@ -145,7 +145,7 @@ static void net_tx_packets(struct XenNetDev *netdev)
                 continue;
             }
 
-            if ((txreq.offset + txreq.size) > XC_PAGE_SIZE) {
+            if ((txreq.offset + txreq.size) > XEN_PAGE_SIZE) {
                 xen_pv_printf(&netdev->xendev, 0, "error: page crossing\n");
                 net_tx_error(netdev, &txreq, rc);
                 continue;
@@ -171,7 +171,7 @@ static void net_tx_packets(struct XenNetDev *netdev)
             if (txreq.flags & NETTXF_csum_blank) {
                 /* have read-only mapping -> can't fill checksum in-place */
                 if (!tmpbuf) {
-                    tmpbuf = g_malloc(XC_PAGE_SIZE);
+                    tmpbuf = g_malloc(XEN_PAGE_SIZE);
                 }
                 memcpy(tmpbuf, page + txreq.offset, txreq.size);
                 net_checksum_calculate(tmpbuf, txreq.size, CSUM_ALL);
@@ -243,9 +243,9 @@ static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t size
     if (rc == rp || RING_REQUEST_CONS_OVERFLOW(&netdev->rx_ring, rc)) {
         return 0;
     }
-    if (size > XC_PAGE_SIZE - NET_IP_ALIGN) {
+    if (size > XEN_PAGE_SIZE - NET_IP_ALIGN) {
         xen_pv_printf(&netdev->xendev, 0, "packet too big (%lu > %ld)",
-                      (unsigned long)size, XC_PAGE_SIZE - NET_IP_ALIGN);
+                      (unsigned long)size, XEN_PAGE_SIZE - NET_IP_ALIGN);
         return -1;
     }
 
@@ -348,8 +348,8 @@ static int net_connect(struct XenLegacyDevice *xendev)
         netdev->txs = NULL;
         return -1;
     }
-    BACK_RING_INIT(&netdev->tx_ring, netdev->txs, XC_PAGE_SIZE);
-    BACK_RING_INIT(&netdev->rx_ring, netdev->rxs, XC_PAGE_SIZE);
+    BACK_RING_INIT(&netdev->tx_ring, netdev->txs, XEN_PAGE_SIZE);
+    BACK_RING_INIT(&netdev->rx_ring, netdev->rxs, XEN_PAGE_SIZE);
 
     xen_be_bind_evtchn(&netdev->xendev);
 

hw/usb/xen-usb.c

@@ -161,7 +161,7 @@ static int usbback_gnttab_map(struct usbback_req *usbback_req)
 
     for (i = 0; i < nr_segs; i++) {
         if ((unsigned)usbback_req->req.seg[i].offset +
-            (unsigned)usbback_req->req.seg[i].length > XC_PAGE_SIZE) {
+            (unsigned)usbback_req->req.seg[i].length > XEN_PAGE_SIZE) {
             xen_pv_printf(xendev, 0, "segment crosses page boundary\n");
             return -EINVAL;
         }
@@ -185,7 +185,7 @@ static int usbback_gnttab_map(struct usbback_req *usbback_req)
 
         for (i = 0; i < usbback_req->nr_buffer_segs; i++) {
             seg = usbback_req->req.seg + i;
-            addr = usbback_req->buffer + i * XC_PAGE_SIZE + seg->offset;
+            addr = usbback_req->buffer + i * XEN_PAGE_SIZE + seg->offset;
             qemu_iovec_add(&usbback_req->packet.iov, addr, seg->length);
         }
     }
@@ -902,8 +902,8 @@ static int usbback_connect(struct XenLegacyDevice *xendev)
     usbif->conn_ring_ref = conn_ring_ref;
     urb_sring = usbif->urb_sring;
     conn_sring = usbif->conn_sring;
-    BACK_RING_INIT(&usbif->urb_ring, urb_sring, XC_PAGE_SIZE);
-    BACK_RING_INIT(&usbif->conn_ring, conn_sring, XC_PAGE_SIZE);
+    BACK_RING_INIT(&usbif->urb_ring, urb_sring, XEN_PAGE_SIZE);
+    BACK_RING_INIT(&usbif->conn_ring, conn_sring, XEN_PAGE_SIZE);
 
     xen_be_bind_evtchn(xendev);