> -----Original Message----- > From: Gerd Hoffmann [mailto:kraxel@xxxxxxxxxx] > Sent: Monday, July 17, 2017 7:03 PM > To: Kirti Wankhede <kwankhede@xxxxxxxxxx>; Zhang, Tina > <tina.zhang@xxxxxxxxx>; Tian, Kevin <kevin.tian@xxxxxxxxx>; linux- > kernel@xxxxxxxxxxxxxxx; intel-gfx@xxxxxxxxxxxxxxxxxxxxx; > alex.williamson@xxxxxxxxxx; zhenyuw@xxxxxxxxxxxxxxx; chris@chris- > wilson.co.uk; Lv, Zhiyuan <zhiyuan.lv@xxxxxxxxx>; intel-gvt- > dev@xxxxxxxxxxxxxxxxxxxxx; Wang, Zhi A <zhi.a.wang@xxxxxxxxx> > Subject: Re: [PATCH v10] vfio: ABI for mdev display dma-buf operation > > Hi, > > > No need of flag here. If vGPU driver is not loaded in the guest, there > > is no surface being managed by vGPU, in that case this size will be > > zero. > > Ok, we certainly have the same situation with intel. When the guest driver is not > loaded (yet) there is no valid surface. > > We should cleanly define what the ioctl should do in that case, so all drivers > behave the same way. > > I'd suggest that all fields defining the surface (drm_format, width, height, stride, > size) should be set to zero in that case. Yeah, it's reasonable. How about the return value? Currently, the ioctl also returns "-ENODEV" in that situation. thanks, Tina > > cheers, > Gerd _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
