From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 727C37DCEA for ; Thu, 13 Jun 2019 15:35:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726779AbfFMPfC (ORCPT ); Thu, 13 Jun 2019 11:35:02 -0400 Received: from mail-pl1-f195.google.com ([209.85.214.195]:34579 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727971AbfFMKbg (ORCPT ); Thu, 13 Jun 2019 06:31:36 -0400 Received: by mail-pl1-f195.google.com with SMTP id i2so7957572plt.1 for ; Thu, 13 Jun 2019 03:31:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=zNYSDlioe1/7qDzUymWdeZ+QFAflos+mlnY8eEGg+0o=; b=yGqrc+PyiSy4n5qr9NdwCtvk10NU0RuIEZpKtR38SSnXyuNE9KtNc4LOsjqZwwRHrh PQjFPkSB3hzxovhRjl67Bjzjq+MyaDq8caifL9XcLBUffnDo6fKiNVZJMaRJqYYrTpLD 236tIR/c1HHyhBzC+DbYQbzknd6nXkp2yR69CfUSomWNfHZq7zDwLo6CtP6Rcz9jQoyU t+UUwCGOlMlfHHdRXEbat32VLMC64YiRRvC+ES6Lwz/POGU5yfdzTRVFTEJkScAUUYU3 CLOA6wc/os0XTJLHRiURlUUYawm0WGmE6fu8bzeXwSSiF2jgcH82LXA8DmqI9CW5kKWM JwmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=zNYSDlioe1/7qDzUymWdeZ+QFAflos+mlnY8eEGg+0o=; b=rrmSua2ojlSusc8cxeDAs9SzrXnLKGG3cCsqwvYRkqarvZs6bVuO/7zgth+/Yt0DyU 1ihGdTGMYj6mKJPzedBH500PVXv1cvnckqTUunxRB0gZn8ZCWZrZ+WHv2JTKfHKE/Fth 36ZrOsqlWS2R76DWrXLw8QCkMy0GRXGxotqVZo96ih6YMG/1g2Y+D0rWqt9/0oKqckbF 02QR08gawj6B2Bhj04y35bTASgcUhJK/ul5RIzC8JpvH9tvTam61r1Tduvv9j/RmdpI0 kQEvysaviSbV0Ab77InXgBlQo0aqkGeA8Gze4dPyLDgBQVL47aDfKOkgQZnXxEKB7lqi iwGQ== X-Gm-Message-State: APjAAAULZVOCWWzvqo9hPWQ5PJl3mQ3moSmXGXBRZO83BiIt2CpRuk6S 6h3476HfD3O1ekvTBT93I+rlKw== X-Google-Smtp-Source: APXvYqy4QNXOS9+usIQOYreRnBfssjCFTNyHTKoO86Zu6g/HvXHvK12eofupFfZNMLkwbIdNB6kb7A== X-Received: by 2002:a17:902:1e6:: with SMTP id b93mr43575179plb.295.1560421895353; Thu, 13 Jun 2019 03:31:35 -0700 (PDT) Received: from localhost.localdomain ([117.196.234.139]) by smtp.gmail.com with ESMTPSA id a12sm2265078pgq.0.2019.06.13.03.31.23 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 13 Jun 2019 03:31:34 -0700 (PDT) From: Sumit Garg To: keyrings@vger.kernel.org, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org Cc: jens.wiklander@linaro.org, corbet@lwn.net, dhowells@redhat.com, jejb@linux.ibm.com, jarkko.sakkinen@linux.intel.com, zohar@linux.ibm.com, jmorris@namei.org, serge@hallyn.com, ard.biesheuvel@linaro.org, daniel.thompson@linaro.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, tee-dev@lists.linaro.org, Sumit Garg Subject: [RFC 1/7] tee: optee: allow kernel pages to register as shm Date: Thu, 13 Jun 2019 16:00:27 +0530 Message-Id: <1560421833-27414-2-git-send-email-sumit.garg@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1560421833-27414-1-git-send-email-sumit.garg@linaro.org> References: <1560421833-27414-1-git-send-email-sumit.garg@linaro.org> Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Kernel pages are marked as normal type memory only so allow kernel pages to be registered as shared memory with OP-TEE. Signed-off-by: Sumit Garg --- drivers/tee/optee/call.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index aa94270..bce45b1 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -553,6 +553,13 @@ static int check_mem_type(unsigned long start, size_t num_pages) struct mm_struct *mm = current->mm; int rc; + /* + * Allow kernel address to register with OP-TEE as kernel + * pages are configured as normal memory only. + */ + if (virt_addr_valid(start)) + return 0; + down_read(&mm->mmap_sem); rc = __check_mem_type(find_vma(mm, start), start + num_pages * PAGE_SIZE); -- 2.7.4