[Qemu-devel] [PULL for-1.7 0/1] spice bugfix queue

[Qemu-devel] [PULL for-1.7 0/1] spice bugfix queue

[Gerd Hoffmann]

  Hi,

Here comes the spice patch queue, with a qxl single bugfix for 1.7.

please pull,
  Gerd

The following changes since commit a126050a103c924b03388a9a64ce9af8c96b0969:

  Merge remote-tracking branch 'kwolf/tags/for-anthony' into staging (2013-10-31 17:02:26 +0100)

are available in the git repository at:


  git://anongit.freedesktop.org/spice/qemu spice.v76

for you to fetch changes up to 4a46c99c8118586f19894fe66fc6e353f159d4d9:

  qxl: replace pipe signaling with bottom half (2013-11-04 12:31:42 +0100)

----------------------------------------------------------------
Gerd Hoffmann (1):
      qxl: replace pipe signaling with bottom half

 hw/display/qxl.c | 33 +++------------------------------
 hw/display/qxl.h |  3 +--
 2 files changed, 4 insertions(+), 32 deletions(-)

[Qemu-devel] [PATCH 1/1] qxl: replace pipe signaling with bottom half

[Gerd Hoffmann]

qxl creates a pipe, then writes something to it to wake up the iothread
from the spice server thread to raise an irq.  These days qemu bottom
halves can be scheduled from threads and signals, so there is no reason
to do this any more.  Time to clean it up.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/qxl.c | 33 +++------------------------------
 hw/display/qxl.h |  3 +--
 2 files changed, 4 insertions(+), 32 deletions(-)

diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 5977d52..efdefd6 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -1701,15 +1701,9 @@ static const MemoryRegionOps qxl_io_ops = {
     },
 };
 
-static void pipe_read(void *opaque)
+static void qxl_update_irq_bh(void *opaque)
 {
     PCIQXLDevice *d = opaque;
-    char dummy;
-    int len;
-
-    do {
-        len = read(d->pipe[0], &dummy, sizeof(dummy));
-    } while (len == sizeof(dummy));
     qxl_update_irq(d);
 }
 
@@ -1730,28 +1724,7 @@ static void qxl_send_events(PCIQXLDevice *d, uint32_t events)
     if ((old_pending & le_events) == le_events) {
         return;
     }
-    if (qemu_thread_is_self(&d->main)) {
-        qxl_update_irq(d);
-    } else {
-        if (write(d->pipe[1], d, 1) != 1) {
-            dprint(d, 1, "%s: write to pipe failed\n", __func__);
-        }
-    }
-}
-
-static void init_pipe_signaling(PCIQXLDevice *d)
-{
-    if (pipe(d->pipe) < 0) {
-        fprintf(stderr, "%s:%s: qxl pipe creation failed\n",
-                __FILE__, __func__);
-        exit(1);
-    }
-    fcntl(d->pipe[0], F_SETFL, O_NONBLOCK);
-    fcntl(d->pipe[1], F_SETFL, O_NONBLOCK);
-    fcntl(d->pipe[0], F_SETOWN, getpid());
-
-    qemu_thread_get_self(&d->main);
-    qemu_set_fd_handler(d->pipe[0], pipe_read, NULL, d);
+    qemu_bh_schedule(d->update_irq);
 }
 
 /* graphics console */
@@ -2044,7 +2017,7 @@ static int qxl_init_common(PCIQXLDevice *qxl)
     }
     qemu_add_vm_change_state_handler(qxl_vm_change_state_handler, qxl);
 
-    init_pipe_signaling(qxl);
+    qxl->update_irq = qemu_bh_new(qxl_update_irq_bh, qxl);
     qxl_reset_state(qxl);
 
     qxl->update_area_bh = qemu_bh_new(qxl_render_update_area_bh, qxl);
diff --git a/hw/display/qxl.h b/hw/display/qxl.h
index 84f0182..c5de3d7 100644
--- a/hw/display/qxl.h
+++ b/hw/display/qxl.h
@@ -81,8 +81,7 @@ typedef struct PCIQXLDevice {
     QemuMutex          track_lock;
 
     /* thread signaling */
-    QemuThread         main;
-    int                pipe[2];
+    QEMUBH             *update_irq;
 
     /* ram pci bar */
     QXLRam             *ram;
-- 
1.8.3.1