From patchwork Tue Aug 10 17:30:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 494362 Delivered-To: patch@linaro.org Received: by 2002:a05:6638:396:0:0:0:0 with SMTP id y22csp4183086jap; Tue, 10 Aug 2021 10:46:03 -0700 (PDT) X-Google-Smtp-Source: ABdhPJy1LQ3qIhpi1uEP+sL+/g4phqZqoL+ZfBFRbst9beetGHcvIkcUBGfP+etDAUYRVj+RLR89 X-Received: by 2002:a17:906:1783:: with SMTP id t3mr1849213eje.351.1628617562994; Tue, 10 Aug 2021 10:46:02 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1628617562; cv=none; d=google.com; s=arc-20160816; b=LULeb37IvjMh0zTkHruHQ3K4Fyw1Asg3l4KZai0K1Nc+fzWIRTgW5vwuk/GZV6rjzH 7d7SD8K285c1TeFirGkpogFFIzrHocd0Kh7kfZ9Nu+knOSb3+WzLHS1j2rAwEoEt9eiq a6JG0iP+CO0PUPhn+HP+X+JFxIFQtm/GkhBi7dQ556IPf80TrK8pO+Ljo4eVjYcyIha6 C60YZ4MmtLo6NXoIHNUmJ7wWs3FAkEIZgCiDTprBspr+0gQKxX90xIsUzzHkjCbJTAiA xjmZLNsKr/ce2mvkF0TiBwzdRsOcFBDd4QPWSoEil9ccFkMCLRgU+VEChC3FUH1rxfMs QbPQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :user-agent:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=T49vJrJ0iZXvrqZCCfvtHVYNL6rJGUY4SGtMCR0cf7s=; b=eFZNAouuJ5XfRbjuqKbPGBcl/MwsN3m9tv7BSdmm+dijtl+iAduUXOe0NK+9w7O49x cevb0CxSWMZ1KEY4+D/p7xR16AxnpuVv5rL7fyp32u48ZbHr+S14YCen4eJA4wSWAzwS Uii9/TbGwfzplqovzhEA/iNtxbW7nXsVZEH8ET1lgpoDlMu3Tl8u8ugQiqW+TQEjzIr1 4df9eVdlsfYP/FhfHVNM6nHrDruW2gKeqazAPmuGq7qcJllcC3/O/9/iQ29j85mJPJW9 vor4hCzmOtzPcz9clUhjR70hwxV5b2GK8qklxI0SC4aljypg5OKvvzHdN4HjfgmCNuU8 zPag== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=a8W8slFz; spf=pass (google.com: domain of stable-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id s10si23927565edd.167.2021.08.10.10.46.02; Tue, 10 Aug 2021 10:46:02 -0700 (PDT) Received-SPF: pass (google.com: domain of stable-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=a8W8slFz; spf=pass (google.com: domain of stable-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234195AbhHJRqV (ORCPT + 12 others); Tue, 10 Aug 2021 13:46:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:38840 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236183AbhHJRof (ORCPT ); Tue, 10 Aug 2021 13:44:35 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3D0F461101; Tue, 10 Aug 2021 17:39:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628617182; bh=A+ZmOuKwtpvP7/Z98qWtfl5PW+bujj7O8LS/Hqb3aoE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a8W8slFzXzlnBTS55laRl5zbmJfgBY8JmKHW56NkIzZs/XTqUlEG/9na5LDCjpxiq N6nOspOhFNeqKNmK6sSdHzy9yqmk2dNuD82q7+kSoILlzSWJEQK90YTaGcWG/43DRN 9GESciNv4z7xwf3PfwsSMgEmuz1za3UyoUlLwEgI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tyler Hicks , Sumit Garg , Jens Wiklander Subject: [PATCH 5.10 082/135] tee: add tee_shm_alloc_kernel_buf() Date: Tue, 10 Aug 2021 19:30:16 +0200 Message-Id: <20210810172958.531581012@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210810172955.660225700@linuxfoundation.org> References: <20210810172955.660225700@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jens Wiklander commit dc7019b7d0e188d4093b34bd0747ed0d668c63bf upstream. Adds a new function tee_shm_alloc_kernel_buf() to allocate shared memory from a kernel driver. This function can later be made more lightweight by unnecessary dma-buf export. Cc: stable@vger.kernel.org Reviewed-by: Tyler Hicks Reviewed-by: Sumit Garg Signed-off-by: Jens Wiklander Signed-off-by: Greg Kroah-Hartman --- drivers/tee/tee_shm.c | 18 ++++++++++++++++++ include/linux/tee_drv.h | 1 + 2 files changed, 19 insertions(+) --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -193,6 +193,24 @@ err_dev_put: } EXPORT_SYMBOL_GPL(tee_shm_alloc); +/** + * tee_shm_alloc_kernel_buf() - Allocate shared memory for kernel buffer + * @ctx: Context that allocates the shared memory + * @size: Requested size of shared memory + * + * The returned memory registered in secure world and is suitable to be + * passed as a memory buffer in parameter argument to + * tee_client_invoke_func(). The memory allocated is later freed with a + * call to tee_shm_free(). + * + * @returns a pointer to 'struct tee_shm' + */ +struct tee_shm *tee_shm_alloc_kernel_buf(struct tee_context *ctx, size_t size) +{ + return tee_shm_alloc(ctx, size, TEE_SHM_MAPPED | TEE_SHM_DMA_BUF); +} +EXPORT_SYMBOL_GPL(tee_shm_alloc_kernel_buf); + struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, size_t length, u32 flags) { --- a/include/linux/tee_drv.h +++ b/include/linux/tee_drv.h @@ -332,6 +332,7 @@ void *tee_get_drvdata(struct tee_device * @returns a pointer to 'struct tee_shm' */ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags); +struct tee_shm *tee_shm_alloc_kernel_buf(struct tee_context *ctx, size_t size); /** * tee_shm_register() - Register shared memory buffer