From patchwork Tue Sep 15 14:13:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 263882 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CF4EDC43461 for ; Tue, 15 Sep 2020 23:56:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A59E20756 for ; Tue, 15 Sep 2020 23:56:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600214184; bh=UPQXZeCNkXHFtjD2PxRqbIz0d0bL7pyAIvK0EYxJTDA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=p1Ga//06QEYVcrNDwhJZd+EAutvomLWLsM0r4LshcOMCKmN7dTWVFNS7iGy8RK4je ZoGFFRpgXq7n4/fYdviRDNI4V6h3DrmMMabmDPfWm7B3yjvTW8kdyeeugkbaaKFWSu Zp8xC0sTjr/urtvWxhdtPD0ckdNtTIDMZC1UmNl8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727185AbgIOX4X (ORCPT ); Tue, 15 Sep 2020 19:56:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:43890 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726949AbgIOOba (ORCPT ); Tue, 15 Sep 2020 10:31:30 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E446022B3A; Tue, 15 Sep 2020 14:22:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600179753; bh=UPQXZeCNkXHFtjD2PxRqbIz0d0bL7pyAIvK0EYxJTDA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SOhmKg2Ro08DzljvnoPmMOhRsrPRxl8Vk6PiFe9968GDT+ecXADuXVVmE6ohjKpxK I4apNxPvr36X4tA8nSQFiTk4fgNiG63OnTDnzt1wXOBq6U/i0OI/IrELK3zWcDc48M BItblohmE6pdnhAZqbnEQHQ7PyDCWbD2w0xWZhM0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jordan Crouse , Rob Clark Subject: [PATCH 5.4 105/132] drm/msm: Split the a5xx preemption record Date: Tue, 15 Sep 2020 16:13:27 +0200 Message-Id: <20200915140649.400517956@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200915140644.037604909@linuxfoundation.org> References: <20200915140644.037604909@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jordan Crouse commit 34221545d2069dc947131f42392fd4cebabe1b39 upstream. The main a5xx preemption record can be marked as privileged to protect it from user access but the counters storage needs to be remain unprivileged. Split the buffers and mark the critical memory as privileged. Cc: stable@vger.kernel.org Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/msm/adreno/a5xx_gpu.h | 1 + drivers/gpu/drm/msm/adreno/a5xx_preempt.c | 25 ++++++++++++++++++++----- 2 files changed, 21 insertions(+), 5 deletions(-) --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.h +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.h @@ -31,6 +31,7 @@ struct a5xx_gpu { struct msm_ringbuffer *next_ring; struct drm_gem_object *preempt_bo[MSM_GPU_MAX_RINGS]; + struct drm_gem_object *preempt_counters_bo[MSM_GPU_MAX_RINGS]; struct a5xx_preempt_record *preempt[MSM_GPU_MAX_RINGS]; uint64_t preempt_iova[MSM_GPU_MAX_RINGS]; --- a/drivers/gpu/drm/msm/adreno/a5xx_preempt.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_preempt.c @@ -226,19 +226,31 @@ static int preempt_init_ring(struct a5xx struct adreno_gpu *adreno_gpu = &a5xx_gpu->base; struct msm_gpu *gpu = &adreno_gpu->base; struct a5xx_preempt_record *ptr; - struct drm_gem_object *bo = NULL; - u64 iova = 0; + void *counters; + struct drm_gem_object *bo = NULL, *counters_bo = NULL; + u64 iova = 0, counters_iova = 0; ptr = msm_gem_kernel_new(gpu->dev, A5XX_PREEMPT_RECORD_SIZE + A5XX_PREEMPT_COUNTER_SIZE, - MSM_BO_UNCACHED, gpu->aspace, &bo, &iova); + MSM_BO_UNCACHED | MSM_BO_MAP_PRIV, gpu->aspace, &bo, &iova); if (IS_ERR(ptr)) return PTR_ERR(ptr); + /* The buffer to store counters needs to be unprivileged */ + counters = msm_gem_kernel_new(gpu->dev, + A5XX_PREEMPT_COUNTER_SIZE, + MSM_BO_UNCACHED, gpu->aspace, &counters_bo, &counters_iova); + if (IS_ERR(counters)) { + msm_gem_kernel_put(bo, gpu->aspace, true); + return PTR_ERR(counters); + } + msm_gem_object_set_name(bo, "preempt"); + msm_gem_object_set_name(counters_bo, "preempt_counters"); a5xx_gpu->preempt_bo[ring->id] = bo; + a5xx_gpu->preempt_counters_bo[ring->id] = counters_bo; a5xx_gpu->preempt_iova[ring->id] = iova; a5xx_gpu->preempt[ring->id] = ptr; @@ -249,7 +261,7 @@ static int preempt_init_ring(struct a5xx ptr->data = 0; ptr->cntl = MSM_GPU_RB_CNTL_DEFAULT; ptr->rptr_addr = rbmemptr(ring, rptr); - ptr->counter = iova + A5XX_PREEMPT_RECORD_SIZE; + ptr->counter = counters_iova; return 0; } @@ -260,8 +272,11 @@ void a5xx_preempt_fini(struct msm_gpu *g struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu); int i; - for (i = 0; i < gpu->nr_rings; i++) + for (i = 0; i < gpu->nr_rings; i++) { msm_gem_kernel_put(a5xx_gpu->preempt_bo[i], gpu->aspace, true); + msm_gem_kernel_put(a5xx_gpu->preempt_counters_bo[i], + gpu->aspace, true); + } } void a5xx_preempt_init(struct msm_gpu *gpu)