From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 3B6F1C433E4 for ; Fri, 24 Jul 2020 05:06:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 145B5206F0 for ; Fri, 24 Jul 2020 05:06:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726782AbgGXFGK (ORCPT ); Fri, 24 Jul 2020 01:06:10 -0400 Received: from mga11.intel.com ([192.55.52.93]:31507 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725929AbgGXFGK (ORCPT ); Fri, 24 Jul 2020 01:06:10 -0400 IronPort-SDR: Emy5Vzi3rtI7JzrijeW5qOgBSrQHg1WJXEZtwS7UTIVVgco4qUOJPwJ7onZaXSQpHdRCAH4I8l 18JQ8mMaV/1w== X-IronPort-AV: E=McAfee;i="6000,8403,9691"; a="148578016" X-IronPort-AV: E=Sophos;i="5.75,389,1589266800"; d="scan'208";a="148578016" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jul 2020 22:06:10 -0700 IronPort-SDR: d4ms3xYCS47v748dTz8/hUkyD8ft8SyA2gI/KqU1nQ7NJMZNfTmvRlE4ns0yuPSbBWE/XDs919 NjVEtUrPPhZw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,389,1589266800"; d="scan'208";a="288879310" Received: from itopinsk-mobl1.ccr.corp.intel.com (HELO localhost) ([10.249.36.179]) by orsmga006.jf.intel.com with ESMTP; 23 Jul 2020 22:06:07 -0700 From: Jarkko Sakkinen To: linux-kernel@vger.kernel.org Cc: Jarkko Sakkinen , linux-mm@kvack.org, Andi Kleen , Masami Hiramatsu , Peter Zijlstra , Andrew Morton Subject: [PATCH v5 2/6] vmalloc: Add text_alloc() and text_free() Date: Fri, 24 Jul 2020 08:05:49 +0300 Message-Id: <20200724050553.1724168-3-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200724050553.1724168-1-jarkko.sakkinen@linux.intel.com> References: <20200724050553.1724168-1-jarkko.sakkinen@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce functions for allocating memory for dynamic trampolines, such as kprobes. An arch can promote the availability of these functions with CONFIG_ARCH_HAS_TEXT_ALLOC. Cc: linux-mm@kvack.org Cc: Andi Kleen Cc: Masami Hiramatsu Suggested-by: Peter Zijlstra Signed-off-by: Jarkko Sakkinen --- include/linux/vmalloc.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 0221f852a7e1..6c151a0ac02a 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -249,4 +249,21 @@ pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms) int register_vmap_purge_notifier(struct notifier_block *nb); int unregister_vmap_purge_notifier(struct notifier_block *nb); +/* + * These functions can be optionally implemented by an arch in order to + * provide specialized functions for allocating trampoline code. + */ + +#ifdef CONFIG_ARCH_HAS_TEXT_ALLOC +/* + * Allocate memory to be used for trampoline code. + */ +void *text_alloc(unsigned long size); + +/* + * Free memory returned from text_alloc(). + */ +void text_free(void *region); +#endif /* CONFIG_ARCH_HAS_TEXT_ALLOC */ + #endif /* _LINUX_VMALLOC_H */ -- 2.25.1