linux-kernel - [PATCH v1 5/6] drm/msm/gpu: Add ttbr0 to the memptrs

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Message-Id: <1580249770-1088-6-git-send-email-jcrouse@codeaurora.org>
Date:   Tue, 28 Jan 2020 15:16:09 -0700
From:   Jordan Crouse <jcrouse@...eaurora.org>
To:     iommu@...ts.linux-foundation.org
Cc:     robin.murphy@....com, will@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, Sean Paul <sean@...rly.run>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Rob Clark <robdclark@...il.com>,
        David Airlie <airlied@...ux.ie>,
        freedreno@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>
Subject: [PATCH v1 5/6] drm/msm/gpu: Add ttbr0 to the memptrs

Targets that support per-instance pagetable switching will have to keep
track of which pagetable belongs to each instance to be able to recover
for preemption.

Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
---

 drivers/gpu/drm/msm/msm_ringbuffer.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.h b/drivers/gpu/drm/msm/msm_ringbuffer.h
index 7764373..c5822bd 100644
--- a/drivers/gpu/drm/msm/msm_ringbuffer.h
+++ b/drivers/gpu/drm/msm/msm_ringbuffer.h
@@ -29,6 +29,7 @@ struct msm_gpu_submit_stats {
 struct msm_rbmemptrs {
 	volatile uint32_t rptr;
 	volatile uint32_t fence;
+	volatile uint64_t ttbr0;
 
 	volatile struct msm_gpu_submit_stats stats[MSM_GPU_SUBMIT_STATS_COUNT];
 };
-- 
2.7.4