[Bug 100587] [CI]gem_mmap_gtt/coherency failing assertion cpu[x] == i

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100587

--- Comment #27 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit 21eb1850fa0bd0a9b729bf3708da78888433027f
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Wed Aug 1 11:47:21 2018 +0100

    drm/i95: Mark GGTT as incoherent for gen10+

    The evidence suggests that we need to start treating writes via GGTT as
    incoherent for gen10+, that is that they are internally buffered and not
    immediately visible via a read along a different physical path.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107398
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107400
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107435
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20180801104721.4030-1-chris@chris-wilson.co.uk

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