From patchwork Thu Feb 12 12:21:10 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Nan X-Patchwork-Id: 5819381 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 7EE47BF440 for ; Thu, 12 Feb 2015 12:42:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B78FE200E6 for ; Thu, 12 Feb 2015 12:42:18 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EEB6C200DE for ; Thu, 12 Feb 2015 12:42:17 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YLt3J-0004g5-JR; Thu, 12 Feb 2015 12:39:29 +0000 Received: from szxga02-in.huawei.com ([119.145.14.65]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YLstk-0000nZ-W0; Thu, 12 Feb 2015 12:29:38 +0000 Received: from 172.24.2.119 (EHLO lggeml423-hub.china.huawei.com) ([172.24.2.119]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CHF26331; Thu, 12 Feb 2015 20:27:58 +0800 (CST) Received: from kernel-host.huawei (10.107.197.247) by lggeml423-hub.china.huawei.com (10.72.61.33) with Microsoft SMTP Server id 14.3.158.1; Thu, 12 Feb 2015 20:27:50 +0800 From: Wang Nan To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [RFC PATCH v2 21/26] early kprobes: add CONFIG_EARLY_KPROBES option. Date: Thu, 12 Feb 2015 20:21:10 +0800 Message-ID: <1423743670-12943-1-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1423743476-11927-1-git-send-email-wangnan0@huawei.com> References: <1423743476-11927-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.107.197.247] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150212_042937_251824_92FF5AA0 X-CRM114-Status: UNSURE ( 5.32 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: lizefan@huawei.com, x86@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Enable early kprobes in Kconfig. Signed-off-by: Wang Nan --- arch/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/Kconfig b/arch/Kconfig index 05d7a8a..06dff4b 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -46,6 +46,18 @@ config KPROBES for kernel debugging, non-intrusive instrumentation and testing. If in doubt, say "N". +config EARLY_KPROBES + depends on KPROBES && OPTPROBES + def_bool y + +config NR_EARLY_KPROBES_SLOTS + int "Number of possible early kprobes" + range 1 64 + default 16 + depends on EARLY_KPROBES + help + Number of early kprobes slots. + config JUMP_LABEL bool "Optimize very unlikely/likely branches" depends on HAVE_ARCH_JUMP_LABEL