On 2019.03.27 09:15:36 +0000, Chris Wilson wrote: > Quoting Zhenyu Wang (2019-03-27 09:06:36) > > This is to disable semaphore usage when on vGPU for now. Unfortunately > > GVT-g hasn't fully enabled semaphore usage yet, so current guest with > > semaphore use would cause vGPU failure. > > > > Although current semaphore failure with vGPU can be simply resolved by > > allowing cmd parser to accept MI_SEMAPHORE_WAIT command with address > > audit, we're checking general usage of semaphore and how we should > > handle it properly for virtualization in consider of function and > > security concern. So we decide to request to disable it for now in > > guest driver. Once GVT could support it, we would add new compat bit > > to turn it on. > > MI_WAIT_SEMAPHORE are used by Vulkan (anvil) as well for VkEvents. For batch buffer usage, current GVT won't scan on non-privileged buffer so that's still accepted. We need to consider all use case of semaphore anyway. thanks -- Open Source Technology Center, Intel ltd. $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
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