From patchwork Thu Nov 21 01:37:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amirreza Zarrabi X-Patchwork-Id: 844735 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 789A32F3B; Thu, 21 Nov 2024 01:37:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732153067; cv=none; b=a+KKiGMb54dl+hK7rL73qyExnJJbTQ2n471x1m4+CZXEfUdHIrppmQMsNZ/YOzVlQhYvgJoGH69Y2yy593EDKdIldy1uGiNWSmOophgcDsspEv95Orno+a2NsbXuKvKsX30yPJfkgAVF+prnK0J9ffaREq2o0nCWBMvhF/nfupo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732153067; c=relaxed/simple; bh=9K6suTcQu49lfLr9ezcWRyBB8GMOiU3qoALqMYzIMOk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=Ih2D4vig1YkwnJe79x7gRQXM5IMwy/5kE6snkSvr52Nkd3hCfT/1TXTo9U/k1jJ4UXVUJE+zrFxBa9Rt1XnuRq5N5OMxMZcSh9kIb+q8Bytlk+UEAk0J5JzOxXmrHn3hiTN8pNtxcPZggfo6sVamhzdxCs7fLsLejXlOPrgUjTo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=mH/VpuER; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="mH/VpuER" Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4AKK262Y005916; Thu, 21 Nov 2024 01:37:43 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= An+w7vVEdUluZfITPbwC2YBMoE9AzBksAtduAIhoa4U=; b=mH/VpuERtntdswhU 8SQZUr6riJDaPmO4FHAv8Mp8qBsiNKz/r5j48adTkoFpFdJZyqrTzk8wtGUxE7uI Zj4XmoTOj5H7Dxk969h6UkPcoY4bJMsO2SbFLSUcUascYJ6IQZGXsUyC7iWYbIPL 2FtUUjDyQ66Q3Tqb/EMjlP6umwkXA4YVMFxi8OWSxtXyKnnBFWkeQ28N5Ftf5w8C N4uWXov2G6FYRwJfZfNG7FLE1eesfxddjgi4p/R1TEzeQg6xjpBKd3b2jsx0hgNv oHCG5CHxsakkKJuhgq5dyx2AGmK7YkX1oQxkz7wGqu49QMRrphQXjFfpaA/8j3up o+KjWw== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4317t23287-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Nov 2024 01:37:43 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA02.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4AL1bgKM012769 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 Nov 2024 01:37:42 GMT Received: from hu-azarrabi-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 20 Nov 2024 17:37:41 -0800 From: Amirreza Zarrabi Date: Wed, 20 Nov 2024 17:37:16 -0800 Subject: [PATCH RFC 2/3] tee: revert removal of linked list of struct tee_shm Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20241120-fix-tee_shm-refcount-upstream-v1-2-5da97f584fcd@quicinc.com> References: <20241120-fix-tee_shm-refcount-upstream-v1-0-5da97f584fcd@quicinc.com> In-Reply-To: <20241120-fix-tee_shm-refcount-upstream-v1-0-5da97f584fcd@quicinc.com> To: Jens Wiklander , Sumit Garg CC: , , , Amirreza Zarrabi X-Mailer: b4 0.13.0 X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: blkLjxCVKKalmrwM0VA4XFJZSHF0HHr9 X-Proofpoint-ORIG-GUID: blkLjxCVKKalmrwM0VA4XFJZSHF0HHr9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 mlxlogscore=999 spamscore=0 bulkscore=0 lowpriorityscore=0 mlxscore=0 malwarescore=0 impostorscore=0 phishscore=0 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411210011 Partially revert commit 59a135f6fb66 ("tee: remove linked list of struct tee_shm"). Reintroduce the linked list to track all tee_shm instances associated with a context. Signed-off-by: Amirreza Zarrabi --- drivers/tee/tee_core.c | 1 + drivers/tee/tee_shm.c | 13 +++++++++++++ include/linux/tee_drv.h | 4 ++++ 3 files changed, 18 insertions(+) diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index d113679b1e2d..93f3b330aec8 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -59,6 +59,7 @@ struct tee_context *teedev_open(struct tee_device *teedev) kref_init(&ctx->refcount); ctx->teedev = teedev; + INIT_LIST_HEAD(&ctx->list_shm); rc = teedev->desc->ops->open(ctx); if (rc) goto err; diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 31e032446cf5..c0164c0f4a01 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -108,6 +108,10 @@ static struct tee_shm *shm_alloc_helper(struct tee_context *ctx, size_t size, goto err_kfree; } + mutex_lock(&teedev->mutex); + list_add_tail(&shm->link, &ctx->list_shm); + mutex_unlock(&teedev->mutex); + teedev_ctx_get(ctx); return shm; err_kfree: @@ -343,6 +347,10 @@ register_shm_helper(struct tee_context *ctx, struct iov_iter *iter, u32 flags, goto err_put_shm_pages; } + mutex_lock(&teedev->mutex); + list_add_tail(&shm->link, &ctx->list_shm); + mutex_unlock(&teedev->mutex); + return shm; err_put_shm_pages: if (!iov_iter_is_kvec(iter)) @@ -577,6 +585,11 @@ void tee_shm_put(struct tee_shm *shm) */ if (shm->id >= 0) idr_remove(&teedev->idr, shm->id); + + /* The context owns shm may be gone already. */ + if (shm->ctx) + list_del(&shm->link); + do_release = true; } mutex_unlock(&teedev->mutex); diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h index 56560441b2cb..1b57cddfecc8 100644 --- a/include/linux/tee_drv.h +++ b/include/linux/tee_drv.h @@ -23,6 +23,7 @@ struct tee_device; /** * struct tee_context - driver specific context on file pointer data * @teedev: pointer to this drivers struct tee_device + * @list_shm: List of shared memory object owned by this context * @data: driver specific context data, managed by the driver * @refcount: reference counter for this structure * @releasing: flag that indicates if context is being released right now. @@ -38,6 +39,7 @@ struct tee_device; */ struct tee_context { struct tee_device *teedev; + struct list_head list_shm; void *data; struct kref refcount; bool releasing; @@ -49,6 +51,7 @@ struct tee_context { * struct tee_shm - shared memory object * @teedev: device used to allocate the object * @ctx: context using the object + * @link link element * @paddr: physical address of the shared memory * @kaddr: virtual address of the shared memory * @size: size of shared memory @@ -66,6 +69,7 @@ struct tee_context { struct tee_shm { struct tee_device *teedev; struct tee_context *ctx; + struct list_head link; phys_addr_t paddr; void *kaddr; size_t size;