From patchwork Thu Feb 28 10:31:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Chen X-Patchwork-Id: 10832767 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0A583180E for ; Thu, 28 Feb 2019 10:32:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED0A92E472 for ; Thu, 28 Feb 2019 10:32:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E125E2E47F; Thu, 28 Feb 2019 10:32:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 98A2F2E4A0 for ; Thu, 28 Feb 2019 10:32:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=F6x+5lH5BYJj7JaJeiFKOjT+pogTgJMB8w6h47kiwLw=; b=RoNLkwckT6ch6K DmOu8IY7p9lcwYPGHaPXzoqzDYlV9V7st4REQU7TidAAAj0xP+y0Hu9Is8qW9MQ5xnFKmE2yEB+Yd h1CYDGCEXyMdQ0vfQaRifdGDWVwWXXM9AMo3+3Mg+3cwuWaJedlynIsODXtjqvMkAwPUvQ2ZviNSa DsCLzhp3Oy6FylCaEk2o16N3/TxX01aiTPriINXIJzhQgeM7CgpcqUgCkrgHt6vvVXapF6sT+3bDT I77KsMvNAoKzhSOyF8sTn/ZwoOp/uxUCusHieadimZ31gMDmNUoMm+blKAZ1E+V4uwQzSwI+he5L/ QpvnZekOXzF0F0yoL3PA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gzIzC-0000ob-Di; Thu, 28 Feb 2019 10:32:18 +0000 Received: from 59-120-53-16.hinet-ip.hinet.net ([59.120.53.16] helo=ATCSQR.andestech.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gzIzA-0000lh-41 for linux-riscv@lists.infradead.org; Thu, 28 Feb 2019 10:32:17 +0000 Received: from mail.andestech.com (atcpcs16.andestech.com [10.0.1.222]) by ATCSQR.andestech.com with ESMTP id x1SAV8eA086824; Thu, 28 Feb 2019 18:31:08 +0800 (GMT-8) (envelope-from vincentc@andestech.com) Received: from atcsqa06.andestech.com (10.0.15.65) by ATCPCS16.andestech.com (10.0.1.222) with Microsoft SMTP Server id 14.3.123.3; Thu, 28 Feb 2019 18:31:42 +0800 From: Vincent Chen To: , , , , , , Subject: [PATCH 2/3] riscv: Support BUG() in kernel module Date: Thu, 28 Feb 2019 18:31:30 +0800 Message-ID: <1551349891-22683-3-git-send-email-vincentc@andestech.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1551349891-22683-1-git-send-email-vincentc@andestech.com> References: <1551349891-22683-1-git-send-email-vincentc@andestech.com> MIME-Version: 1.0 X-Originating-IP: [10.0.15.65] X-DNSRBL: X-MAIL: ATCSQR.andestech.com x1SAV8eA086824 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190228_023216_425562_A75D492F X-CRM114-Status: UNSURE ( 8.58 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vincentc@andestech.com, deanbo422@gmail.com Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The kernel module is loaded into vmalloc region which is located below to the PAGE_OFFSET. Hence the condition, pc < PAGE_OFFSET, in the is_valid_bugaddr() will filter out all trap exceptions triggered by kernel module. To support BUG() in kernel module, the condition is changed to pc < VMALLOC_START. Signed-off-by: Vincent Chen --- arch/riscv/kernel/traps.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index deae0e5..dee0e5e 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -144,7 +144,7 @@ int is_valid_bugaddr(unsigned long pc) { bug_insn_t insn; - if (pc < PAGE_OFFSET) + if (pc < VMALLOC_START) return 0; if (probe_kernel_address((bug_insn_t *)pc, insn)) return 0;