From patchwork Tue Aug 10 17:30:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 494355 Delivered-To: patch@linaro.org Received: by 2002:a05:6638:396:0:0:0:0 with SMTP id y22csp4172543jap; Tue, 10 Aug 2021 10:33:12 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzlJX+x8Yxrhqq0AFrPwS9yhKi/6OgsN2KBVZxilGDca91cDQIcgUJlWtMBUfpG4AAvbY0Q X-Received: by 2002:a05:6402:4243:: with SMTP id g3mr6348400edb.254.1628616792428; Tue, 10 Aug 2021 10:33:12 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1628616792; cv=none; d=google.com; s=arc-20160816; b=dwhQtcK+QWWnT+Btn2Za0l/U8xZeBfoteNcS5AlqVkp6Gu06sJKnGOZYH21b85tgEH 7f+LUgG7cfLds1mfl6OUT+cVwxMzRbLX+fUpHsczsTz2z2aGTbEfdb8AroJqdT7/c36n vwQwSxjFCI951c5uFEmlksgOYGp+7TtHrGIco01ceFnynwyPn/QuViq1GJ7JZwoXgTg1 wPA5TZMmXux55wyt5R54zPx35BGqVgylzbLs1oGdDdGOg545/qN0uz11TW906q3PM7ot +nVTBJjcr8zXcLtsbHCcawD41zo7pJ+1XUp9GZ7Wr7GN8Rh3o7y5H1IEKrewgTinrQSu Snog== 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=OQ1mLE4SpNf7cZFt5j92gT1BcjCzOOUTNVMU9WLl93g=; b=JkcX8uTAMi4CSBPJq+ijwxlpZcuSyq7+0mG5LGOFvh+zIOaA3kXAJhU1K3wEyzuC63 MMfc7zo15MEe/1+wkC24wY48VtQ+g/EIqBfJy43vBU10oWdwyfwbnepgqIOUVZwHV0vA tYGlMuJ553i+b+lQEylQYzVwQP55PzpW7gwfIARLmEhfKLJlVKhnl5ixgCqeOVcscmjE +Yux9M2Zftc5P66GOBsCZeTNCUCpUafjyer8FnQfsyvnVRuaDWNEtJ89oLhKVmucLDvJ TgppuqLwX5o4QwT3SjRUGi6V9IP+ON6PUGsSGzzf98NdZSk+fZaq3pnUlcYLif3eNWPX o9fg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=qVMKrmgA; 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 hq34si1262475ejc.343.2021.08.10.10.33.11; Tue, 10 Aug 2021 10:33:12 -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=qVMKrmgA; 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 S232659AbhHJRdd (ORCPT + 12 others); Tue, 10 Aug 2021 13:33:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:33730 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232206AbhHJRdJ (ORCPT ); Tue, 10 Aug 2021 13:33:09 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 35D2E60F56; Tue, 10 Aug 2021 17:32:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628616766; bh=U9voHKdbdy7j3vhSy8C//XOKs1jcQG0JGPELGqh0ZNg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qVMKrmgAbTD6YRkEzxd+MmMUXjksxyHd6ppYJUfQeH5pFLyEQp6H7K++BLyVy8/he SMVKxQeSWno1M2Iy3mRcSNSWLrs8gRifkkJ2cX+xdZ3w5MvmVqxBRI2dsnmhM8GcUI 36P8Z5s1cUDal7/gt6zsoBCeAXNO+T82UUHfvYvw= 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 4.19 36/54] tee: add tee_shm_alloc_kernel_buf() Date: Tue, 10 Aug 2021 19:30:30 +0200 Message-Id: <20210810172945.369365872@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210810172944.179901509@linuxfoundation.org> References: <20210810172944.179901509@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 @@ -228,6 +228,24 @@ struct tee_shm *tee_shm_priv_alloc(struc } EXPORT_SYMBOL_GPL(tee_shm_priv_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 @@ -317,6 +317,7 @@ 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_priv_alloc() - Allocate shared memory privately