Quoting Lionel Landwerlin (2020-03-27 10:32:07)
> We want to enable performance monitoring on multiple contexts to cover
> the Iris use case of using 2 GEM contexts (3D & compute).
>
> So start by breaking the OA configuration BO which contains global &
> per context register writes.
>
> NOA muxes & OA configurations are global, while FLEXEU register
> configurations are per context.
>
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_perf.c | 194 ++++++++++++++++++++++---------
> 1 file changed, 137 insertions(+), 57 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
> index 3222f6cd8255..f524f50abdef 100644
> --- a/drivers/gpu/drm/i915/i915_perf.c
> +++ b/drivers/gpu/drm/i915/i915_perf.c
> @@ -376,7 +376,8 @@ struct i915_oa_config_bo {
> struct llist_node node;
>
> struct i915_oa_config *oa_config;
> - struct i915_vma *vma;
> + struct i915_vma *ctx_vma;
> + struct i915_vma *global_vma;
What's the allocation like? Worth packing into one vma and use an
offset?
-Chris
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