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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 2007EC63777 for ; Mon, 30 Nov 2020 17:50:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D7C21206E3 for ; Mon, 30 Nov 2020 17:50:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387687AbgK3Rtb (ORCPT ); Mon, 30 Nov 2020 12:49:31 -0500 Received: from out30-45.freemail.mail.aliyun.com ([115.124.30.45]:56129 "EHLO out30-45.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729230AbgK3Rta (ORCPT ); Mon, 30 Nov 2020 12:49:30 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R341e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04400;MF=rongwei.wang@linux.alibaba.com;NM=1;PH=DS;RN=16;SR=0;TI=SMTPD_---0UH3N1OB_1606758525; Received: from localhost.localdomain(mailfrom:rongwei.wang@linux.alibaba.com fp:SMTPD_---0UH3N1OB_1606758525) by smtp.aliyun-inc.com(127.0.0.1); Tue, 01 Dec 2020 01:48:46 +0800 From: Rongwei Wang To: catalin.marinas@arm.com, will@kernel.org, bjorn.andersson@linaro.org, shawnguo@kernel.org Cc: vkoul@kernel.org, geert+renesas@glider.be, Anson.Huang@nxp.com, michael@walle.cc, krzk@kernel.org, olof@lixom.net, vincenzo.frascino@arm.com, ardb@kernel.org, masahiroy@kernel.org, gshan@redhat.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] arm64:insn: Export symbols for MSR ARM driver Date: Tue, 1 Dec 2020 01:48:31 +0800 Message-Id: <20201130174833.41315-2-rongwei.wang@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201130174833.41315-1-rongwei.wang@linux.alibaba.com> References: <20201130174833.41315-1-rongwei.wang@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In order to use the MSR-ARM driver in module and built-in ways, we need export following symbols. The MSR-ARM driver depends on function aarch64_insn_patch_text to modify the text at runtime, and function aarch64_insn_read to read one instruction in the specified address. In addition, we need register_undef_hook and unregister_undef_hook to handle the low probability undefined exception which triggered only by MSR-ARM driver. Signed-off-by: Rongwei Wang --- arch/arm64/kernel/insn.c | 2 ++ arch/arm64/kernel/traps.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index 6c0de2f..67a1f78 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -135,6 +135,7 @@ int __kprobes aarch64_insn_read(void *addr, u32 *insnp) return ret; } +EXPORT_SYMBOL(aarch64_insn_read); static int __kprobes __aarch64_insn_write(void *addr, __le32 insn) { @@ -247,6 +248,7 @@ int __kprobes aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt) return stop_machine_cpuslocked(aarch64_insn_patch_text_cb, &patch, cpu_online_mask); } +EXPORT_SYMBOL(aarch64_insn_patch_text); static int __kprobes aarch64_get_imm_shift_mask(enum aarch64_insn_imm_type type, u32 *maskp, int *shiftp) diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 8af4e0e..c76efa5 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -292,6 +292,7 @@ void register_undef_hook(struct undef_hook *hook) list_add(&hook->node, &undef_hook); raw_spin_unlock_irqrestore(&undef_lock, flags); } +EXPORT_SYMBOL(register_undef_hook); void unregister_undef_hook(struct undef_hook *hook) { @@ -301,6 +302,7 @@ void unregister_undef_hook(struct undef_hook *hook) list_del(&hook->node); raw_spin_unlock_irqrestore(&undef_lock, flags); } +EXPORT_SYMBOL(unregister_undef_hook); static int call_undef_hook(struct pt_regs *regs) { -- 1.8.3.1