From patchwork Mon Mar 2 14:24:56 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Nan X-Patchwork-Id: 5913991 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 8D222BF440 for ; Mon, 2 Mar 2015 14:44:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 35893201FB for ; Mon, 2 Mar 2015 14:44:10 +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 4A88520218 for ; Mon, 2 Mar 2015 14:44:08 +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 1YSRX9-000172-AM; Mon, 02 Mar 2015 14:41:23 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YSRJH-00045N-JM for linux-arm-kernel@bombadil.infradead.org; Mon, 02 Mar 2015 14:27:03 +0000 Received: from szxga01-in.huawei.com ([119.145.14.64]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YSRJE-0003SN-IL for linux-arm-kernel@lists.infradead.org; Mon, 02 Mar 2015 14:27:02 +0000 Received: from 172.24.2.119 (EHLO lggeml422-hub.china.huawei.com) ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CKE50603; Mon, 02 Mar 2015 22:25:55 +0800 (CST) Received: from kernel-host.huawei (10.107.197.247) by lggeml422-hub.china.huawei.com (10.72.61.32) with Microsoft SMTP Server id 14.3.158.1; Mon, 2 Mar 2015 22:25:46 +0800 From: Wang Nan To: , , , , Subject: [RFC PATCH v4 18/34] early kprobes: add CONFIG_EARLY_KPROBES option. Date: Mon, 2 Mar 2015 22:24:56 +0800 Message-ID: <1425306312-3437-19-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1425306312-3437-1-git-send-email-wangnan0@huawei.com> References: <1425306312-3437-1-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-20150302_092701_363569_82FEC978 X-CRM114-Status: UNSURE ( 6.53 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -4.2 (----) Cc: x86@kernel.org, lizefan@huawei.com, 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. Currently only allow early kprobes for ARM. Following patchs will deal with KPROBES_ON_FTRACE. After that x86 will also be enabled. Signed-off-by: Wang Nan --- arch/Kconfig | 19 +++++++++++++++++++ arch/arm/Kconfig | 1 + 2 files changed, 20 insertions(+) diff --git a/arch/Kconfig b/arch/Kconfig index 05d7a8a..8a772ab 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -46,6 +46,22 @@ config KPROBES for kernel debugging, non-intrusive instrumentation and testing. If in doubt, say "N". +config EARLY_KPROBES + bool "Enable kprobes at very early booting stage" + depends on KPROBES + depends on HAVE_EARLY_KPROBES + def_bool y + help + Enable kprobe at very early booting stage. + +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 @@ -170,6 +186,9 @@ config HAVE_IOREMAP_PROT config HAVE_KPROBES bool +config HAVE_EARLY_KPROBES + bool + config HAVE_KRETPROBES bool diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 9f1f09a..84ad7f9 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -43,6 +43,7 @@ config ARM select HAVE_DMA_ATTRS select HAVE_DMA_CONTIGUOUS if MMU select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) + select HAVE_EARLY_KPROBES if (HAVE_KPROBES) select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)