drm/amdgpu: always allocate cleared VRAM for GEM allocations

This adds allocation latency, but aligns better with user
expectations.  The latency should improve with the drm buddy
clearing patches that Arun has been working on.

In addition this fixes the high CPU spikes seen when doing
wipe on release.

v2: always set AMDGPU_GEM_CREATE_VRAM_CLEARED (Christian)

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3528
Fixes: a68c7ea ("drm/amdgpu: Enable clear page functionality")
Acked-by: Arunpravin Paneer Selvam <[email protected]>
Reviewed-by: Michel Dänzer <[email protected]> (v1)
Signed-off-by: Alex Deucher <[email protected]>
Cc: Arunpravin Paneer Selvam <[email protected]>
Cc: Christian König <[email protected]>
(cherry picked from commit 6c0a7c3)
Cc: [email protected] # 6.10.x

Author: alexdeucher

drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c

@@ -348,6 +348,9 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
 		return -EINVAL;
 	}
 
+	/* always clear VRAM */
+	flags |= AMDGPU_GEM_CREATE_VRAM_CLEARED;
+
 	/* create a gem object to contain this object in */
 	if (args->in.domains & (AMDGPU_GEM_DOMAIN_GDS |
 	    AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {