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drm/v3d: Invalidate the caches from the outside in.

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This would be a fairly obscure race, but let's make sure we don't ever
lose it.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181203222438.25417-6-eric@anholt.net
Reviewed-by: Dave Emett <david.emett@broadcom.com>
This commit is contained in:
Eric Anholt 2018-12-03 14:24:38 -08:00
parent 7b9d2fe435
commit aa5beec32e
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/v3d/v3d_gem.c
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@ -171,11 +171,15 @@ v3d_invalidate_slices(struct v3d_dev *v3d, int core)
void
v3d_invalidate_caches(struct v3d_dev *v3d)
{
/* Invalidate the caches from the outside in. That way if
* another CL's concurrent use of nearby memory were to pull
* an invalidated cacheline back in, we wouldn't leave stale
* data in the inner cache.
*/
v3d_flush_l3(v3d);
v3d_invalidate_l2c(v3d, 0);
v3d_invalidate_slices(v3d, 0);
v3d_flush_l2t(v3d, 0);
v3d_invalidate_slices(v3d, 0);
}
static void