[Qemu-devel] [PATCH 2/3] hw/qxl: add support for QXL_IO_CAPABILITIES_SET

[Alon Levy <alevy@redhat.com>]

Guest set capabilities are written to the spice server via
spice_qxl_guest_capabilities_set, provided the compiled against
spice server is new enough to provide this symbol.

QXL device revision will be raised in a later patch to advertise this
support to the guest.

Signed-off-by: Alon Levy <alevy@redhat.com>
---
 configure    |  7 +++++++
 hw/qxl.c     | 24 ++++++++++++++++++++++++
 trace-events |  1 +
 3 files changed, 32 insertions(+)

diff --git a/configure b/configure
index 30be784..d0e3eb1 100755
--- a/configure
+++ b/configure
@@ -2709,6 +2709,9 @@ EOF
     if $pkg_config --atleast-version=0.12.0 spice-protocol >/dev/null 2>&1; then
         spice_qxl_io_monitors_config_async="yes"
     fi
+    if $pkg_config --atleast-version=0.12.2 spice-protocol >/dev/null 2>&1; then
+        spice_qxl_io_client_monitors_config="yes"
+    fi
   else
     if test "$spice" = "yes" ; then
       feature_not_found "spice"
@@ -3456,6 +3459,10 @@ if test "$spice_qxl_io_monitors_config_async" = "yes" ; then
   echo "CONFIG_QXL_IO_MONITORS_CONFIG_ASYNC=y" >> $config_host_mak
 fi
 
+if test "$spice_qxl_io_client_monitors_config" = "yes" ; then
+  echo "CONFIG_QXL_IO_CLIENT_MONITORS_CONFIG=y" >> $config_host_mak
+fi
+
 if test "$smartcard" = "yes" ; then
   echo "CONFIG_SMARTCARD=y" >> $config_host_mak
 fi
diff --git a/hw/qxl.c b/hw/qxl.c
index 94eb3c8..583a2d9 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -32,6 +32,10 @@
 #define QXL_IO_MONITORS_CONFIG_ASYNC (QXL_IO_FLUSH_RELEASE + 1)
 #endif
 
+#ifndef CONFIG_QXL_IO_CLIENT_MONITORS_CONFIG
+#define QXL_IO_CAPABILITIES_SET (QXL_IO_FLUSH_RELEASE + 2)
+#endif
+
 /*
  * NOTE: SPICE_RING_PROD_ITEM accesses memory on the pci bar and as
  * such can be changed by the guest, so to avoid a guest trigerrable
@@ -289,6 +293,21 @@ static void qxl_spice_monitors_config_async(PCIQXLDevice *qxl, int replay)
 #endif
 }
 
+static void qxl_spice_guest_capabilities_set(PCIQXLDevice *qxl)
+{
+#if SPICE_SERVER_VERSION >= 0x000b05 && \
+    defined(CONFIG_QXL_IO_CLIENT_MONITORS_CONFIG)
+    uint8_t guest_capabilities[sizeof(qxl->ram->guest_capabilities)];
+
+    trace_qxl_io_capabilities_set(qxl->id, sizeof(qxl->ram->guest_capabilities),
+                                  qxl->ram->guest_capabilities);
+    memcpy(guest_capabilities, qxl->ram->guest_capabilities,
+           sizeof(guest_capabilities));
+    spice_qxl_guest_capabilities_set(&qxl->ssd.qxl, sizeof(guest_capabilities),
+                                     guest_capabilities);
+#endif
+}
+
 void qxl_spice_reset_image_cache(PCIQXLDevice *qxl)
 {
     trace_qxl_spice_reset_image_cache(qxl->id);
@@ -576,6 +595,7 @@ static const char *io_port_to_string(uint32_t io_port)
         [QXL_IO_FLUSH_SURFACES_ASYNC]   = "QXL_IO_FLUSH_SURFACES_ASYNC",
         [QXL_IO_FLUSH_RELEASE]          = "QXL_IO_FLUSH_RELEASE",
         [QXL_IO_MONITORS_CONFIG_ASYNC]  = "QXL_IO_MONITORS_CONFIG_ASYNC",
+        [QXL_IO_CAPABILITIES_SET]       = "QXL_IO_CAPABILITIES_SET",
     };
 
     if (io_port >= ARRAY_SIZE(io_port_to_string)) {
@@ -1398,6 +1418,7 @@ static void ioport_write(void *opaque, target_phys_addr_t addr,
     case QXL_IO_LOG:
     case QXL_IO_MEMSLOT_ADD_ASYNC:
     case QXL_IO_CREATE_PRIMARY_ASYNC:
+    case QXL_IO_CAPABILITIES_SET:
         break;
     default:
         if (d->mode != QXL_MODE_VGA) {
@@ -1580,6 +1601,9 @@ async_common:
     case QXL_IO_MONITORS_CONFIG_ASYNC:
         qxl_spice_monitors_config_async(d, 0);
         break;
+    case QXL_IO_CAPABILITIES_SET:
+        qxl_spice_guest_capabilities_set(d);
+        break;
     default:
         qxl_set_guest_bug(d, "%s: unexpected ioport=0x%x\n", __func__, io_port);
     }
diff --git a/trace-events b/trace-events
index 42dfb93..7a35f62 100644
--- a/trace-events
+++ b/trace-events
@@ -927,6 +927,7 @@ qxl_io_destroy_primary_ignored(int qid, const char *mode) "%d %s"
 qxl_io_read_unexpected(int qid) "%d"
 qxl_io_unexpected_vga_mode(int qid, uint64_t addr, uint64_t val, const char *desc) "%d 0x%"PRIx64"=%"PRIu64" (%s)"
 qxl_io_write(int qid, const char *mode, uint64_t addr, uint64_t val, unsigned size, int async) "%d %s addr=%"PRIu64 " val=%"PRIu64" size=%u async=%d"
+qxl_io_capabilities_set(int qid, int caps_size, uint8_t *caps) "%d %d %p"
 qxl_memslot_add_guest(int qid, uint32_t slot_id, uint64_t guest_start, uint64_t guest_end) "%d %u: guest phys 0x%"PRIx64 " - 0x%" PRIx64
 qxl_post_load(int qid, const char *mode) "%d %s"
 qxl_pre_load(int qid) "%d"
-- 
1.7.12