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drm/i915: Replace the unconditional clflush with drm_clflush_virt_range() 

Not all machines have clflush, so don't go assuming they do.
Not really sure why the clflush is even here since hwsp
is supposed to get snooped I thought.

Although in my case we're talking about a i830 machine where
render/blitter snooping is definitely busted. But it might
work for the hswp perhaps. Haven't really reverse engineered
that one fully.

Cc: stable@vger.kernel.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Fixes: b436a5f8b6 ("drm/i915/gt: Track all timelines created using the HWSP")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211014090941.12159-2-ville.syrjala@linux.intel.com
Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Ville Syrjälä 2021-10-14 12:09:38 +03:00
parent 4eb61ddc1b
commit ef7ec41f17
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/gt/intel_ring_submission.c
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@ -292,7 +292,7 @@ static void xcs_sanitize(struct intel_engine_cs *engine)
sanitize_hwsp(engine);
/* And scrub the dirty cachelines for the HWSP */
clflush_cache_range(engine->status_page.addr, PAGE_SIZE);
drm_clflush_virt_range(engine->status_page.addr, PAGE_SIZE);
intel_engine_reset_pinned_contexts(engine);
}