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    Subject[PATCH 03/21] drm/i915/gt: Invalidate TLB of the OA unit at TLB invalidations
    Date
    From: Chris Wilson <chris.p.wilson@intel.com>

    Ensure that the TLB of the OA unit is also invalidated
    on gen12 HW, as just invalidating the TLB of an engine is not
    enough.

    Cc: stable@vger.kernel.org
    Fixes: 7938d61591d3 ("drm/i915: Flush TLBs before releasing backing store")
    Signed-off-by: Chris Wilson <chris.p.wilson@intel.com>
    Cc: Fei Yang <fei.yang@intel.com>
    Cc: Andi Shyti <andi.shyti@linux.intel.com>
    Acked-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
    Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
    ---

    See [PATCH 00/21] at: https://lore.kernel.org/all/cover.1657703926.git.mchehab@kernel.org/

    drivers/gpu/drm/i915/gt/intel_gt.c | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
    index c4d43da84d8e..1d84418e8676 100644
    --- a/drivers/gpu/drm/i915/gt/intel_gt.c
    +++ b/drivers/gpu/drm/i915/gt/intel_gt.c
    @@ -11,6 +11,7 @@
    #include "pxp/intel_pxp.h"

    #include "i915_drv.h"
    +#include "i915_perf_oa_regs.h"
    #include "intel_context.h"
    #include "intel_engine_pm.h"
    #include "intel_engine_regs.h"
    @@ -969,6 +970,15 @@ void intel_gt_invalidate_tlbs(struct intel_gt *gt)
    awake |= engine->mask;
    }

    + /* Wa_2207587034:tgl,dg1,rkl,adl-s,adl-p */
    + if (awake &&
    + (IS_TIGERLAKE(i915) ||
    + IS_DG1(i915) ||
    + IS_ROCKETLAKE(i915) ||
    + IS_ALDERLAKE_S(i915) ||
    + IS_ALDERLAKE_P(i915)))
    + intel_uncore_write_fw(uncore, GEN12_OA_TLB_INV_CR, 1);
    +
    spin_unlock_irq(&uncore->lock);

    for_each_engine_masked(engine, gt, awake, tmp) {
    --
    2.36.1
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