From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754709AbbCBO0I (ORCPT ); Mon, 2 Mar 2015 09:26:08 -0500 Received: from szxga01-in.huawei.com ([119.145.14.64]:43000 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754641AbbCBO0D (ORCPT ); Mon, 2 Mar 2015 09:26:03 -0500 From: Wang Nan To: , , , , CC: , , , 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 Content-Type: text/plain X-Originating-IP: [10.107.197.247] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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) -- 1.8.4