Re: [PATCH 4/7] drm/i915: always pin lrc context for vgpu with Intel GVT-g

Chris Wilson
2015-08-20T08:36:06Z

On Thu, Aug 20, 2015 at 03:45:21PM +0800, Zhiyuan Lv wrote:
> Intel GVT-g will perform EXECLIST context shadowing and ring buffer
> shadowing. The shadow copy is created when guest creates a context.
> If a context changes its LRCA address, the hypervisor is hard to know
> whether it is a new context or not. We always pin context objects to
> global GTT to make life easier.

Nak. Please explain why we need to workaround a bug in the host. We
cannot pin the context as that breaks userspace (e.g. synmark) who can
and will try to use more contexts than we have room.
-Chris

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Chris Wilson, Intel Open Source Technology Centre