Quoting Matthew Auld (2020-11-27 12:06:19)
> Based on a patch from Michel Thierry.
>
> Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Abdiel Janulgue <abdiel.janulgue@xxxxxxxxxxxxxxx>
> ---
> .../drm/i915/gt/intel_execlists_submission.c | 31 ++++++++++++++++++-
> 1 file changed, 30 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> index 582a9044727e..c640b90711fd 100644
> --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
> @@ -108,6 +108,8 @@
> */
> #include <linux/interrupt.h>
>
> +#include "gem/i915_gem_lmem.h"
> +
> #include "i915_drv.h"
> #include "i915_perf.h"
> #include "i915_trace.h"
> @@ -4660,6 +4662,21 @@ static struct intel_timeline *pinned_timeline(struct intel_context *ce)
> page_unmask_bits(tl));
> }
>
> +static int context_clear_lmem(struct drm_i915_gem_object *ctx_obj)
> +{
> + void *vaddr;
> +
> + vaddr = i915_gem_object_pin_map(ctx_obj, I915_MAP_WC);
> + if (IS_ERR(vaddr))
> + return PTR_ERR(vaddr);
> +
> + memset64(vaddr, 0, ctx_obj->base.size / sizeof(u64));
> +
> + i915_gem_object_unpin_map(ctx_obj);
What? We copy over the entire object with the default state.
-Chris
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