>From fed782e33714e6a44bca9a8c3ab8b017393e8089 Mon Sep 17 00:00:00 2001

From: Alon Levy <alevy@redhat.com>

Date: Sun, 5 Jun 2011 11:01:48 +0300

Subject: [PATCH 21/28] qxl: add QXL_IO_FLUSH_{SURFACES,RELEASE} for guest

 S3&S4 support

Add two new IOs.

 QXL_IO_FLUSH_SURFACES - equivalent to update area for all surfaces, used

  to reduce vmexits from NumSurfaces to 1 on guest S3, S4 and resolution change (windows

  driver implementation is such that this is done on each of those occasions).

 QXL_IO_FLUSH_RELEASE - used to ensure anything on last_release is put on the release ring

  for the client to free.

Signed-off-by: Yonit Halperin <yhalperi@redhat.com>

Signed-off-by: Alon Levy <alevy@redhat.com>

---

 hw/qxl.c |   30 ++++++++++++++++++++++++++++++

 1 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/hw/qxl.c b/hw/qxl.c

index d3109e4..847a9b8 100644

--- a/hw/qxl.c

+++ b/hw/qxl.c

@@ -185,6 +185,13 @@ static void qxl_spice_destroy_surface_wait(PCIQXLDevice *qxl, uint32_t id,

     }

 }

+#if SPICE_INTERFACE_QXL_MINOR >= 1

+static void qxl_spice_flush_surfaces_async(PCIQXLDevice *qxl)

+{

+    spice_qxl_flush_surfaces_async(&qxl->ssd.qxl, 0);

+}

+#endif

+

 void qxl_spice_loadvm_commands(PCIQXLDevice *qxl, struct QXLCommandExt *ext,

                                uint32_t count)

 {

@@ -1184,6 +1191,8 @@ static void ioport_write(void *opaque, uint32_t addr, uint32_t val)

         goto async_common;

     case QXL_IO_DESTROY_ALL_SURFACES_ASYNC:

         io_port = QXL_IO_DESTROY_ALL_SURFACES;

+        goto async_common;

+    case QXL_IO_FLUSH_SURFACES_ASYNC:

 async_common:

         async = QXL_ASYNC;

         qemu_mutex_lock(&d->async_lock);

@@ -1296,6 +1305,27 @@ async_common:

         }

         qxl_spice_destroy_surface_wait(d, val, async);

         break;

+#if SPICE_INTERFACE_QXL_MINOR >= 1

+    case QXL_IO_FLUSH_RELEASE: {

+        QXLReleaseRing *ring = &d->ram->release_ring;

+        if (ring->prod - ring->cons + 1 == ring->num_items) {

+            fprintf(stderr,

+                "ERROR: no flush, full release ring [p%d,%dc]\n",

+                ring->prod, ring->cons);

+        }

+        qxl_push_free_res(d, 1 /* flush */);

+        dprint(d, 1, "QXL_IO_FLUSH_RELEASE exit (%s, s#=%d, res#=%d,%p)\n",

+            qxl_mode_to_string(d->mode), d->guest_surfaces.count,

+            d->num_free_res, d->last_release);

+        break;

+    }

+    case QXL_IO_FLUSH_SURFACES_ASYNC:

+        dprint(d, 1, "QXL_IO_FLUSH_SURFACES_ASYNC (%d) (%s, s#=%d, res#=%d)\n",

+               val, qxl_mode_to_string(d->mode), d->guest_surfaces.count,

+               d->num_free_res);

+        qxl_spice_flush_surfaces_async(d);

+        break;

+#endif

     case QXL_IO_DESTROY_ALL_SURFACES:

         d->mode = QXL_MODE_UNDEFINED;

         qxl_spice_destroy_surfaces(d, async);

-- 

1.7.5.1