6a01308788
Preparation for further scenarios when memory allocation failure can happen and we'll need to use fallback when possible. Memory allocation can fail in following cases: - when non-forced memory allocation used and the attempt to allocate the memory must be as fast as possible, without waits - when forced memory allocation used, but the driver already received stop command and waits for thread termination. Note that in case the VSync control is enabled stop command may happen even after the video subsystem executes switch to VGA mode. In such case QEMU will not return previously allocated objects (assuming the QXL driver already disabled and ignoring callbacks from Spice server in VGA mode). In case of forced memory allocation the allocation routine waits unpredictable time until the request is satisfied. In current commit we do not acquire m_MemLock mutex for all this time, but release it when entering long wait to allow another caller to try allocating memory. Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com> Acked-by: Frediano Ziglio <fziglio@redhat.com>
QXL-WDDM-DOD
Heavily based on Microsoft KMDOD example and XDDM QXL driver
The most recent binaries can be found at https://www.spice-space.org/download/windows/qxl-wddm-dod/