Message ID | 20220812070557.1028499-4-tongtiangen@huawei.com (mailing list archive) |
---|---|
State | New |
Headers | show
Return-Path: <owner-linux-mm@kvack.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id D6434C00140 for <linux-mm@archiver.kernel.org>; Fri, 12 Aug 2022 07:06:32 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 65C738E0003; Fri, 12 Aug 2022 03:06:32 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 596CF8E0002; Fri, 12 Aug 2022 03:06:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 39B8E8E0003; Fri, 12 Aug 2022 03:06:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 100A08E0002 for <linux-mm@kvack.org>; Fri, 12 Aug 2022 03:06:32 -0400 (EDT) Received: from smtpin31.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id D1734813A1 for <linux-mm@kvack.org>; Fri, 12 Aug 2022 07:06:31 +0000 (UTC) X-FDA: 79790057382.31.28BB36F Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by imf22.hostedemail.com (Postfix) with ESMTP id E1BF8C0165 for <linux-mm@kvack.org>; Fri, 12 Aug 2022 07:06:30 +0000 (UTC) Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4M3vll1wdMzlVjx; Fri, 12 Aug 2022 15:03:31 +0800 (CST) Received: from kwepemm600017.china.huawei.com (7.193.23.234) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 12 Aug 2022 15:06:27 +0800 Received: from localhost.localdomain (10.175.112.125) by kwepemm600017.china.huawei.com (7.193.23.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 12 Aug 2022 15:06:25 +0800 From: Tong Tiangen <tongtiangen@huawei.com> To: Mark Rutland <mark.rutland@arm.com>, James Morse <james.morse@arm.com>, Andrew Morton <akpm@linux-foundation.org>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, Robin Murphy <robin.murphy@arm.com>, Dave Hansen <dave.hansen@linux.intel.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Alexander Viro <viro@zeniv.linux.org.uk>, Michael Ellerman <mpe@ellerman.id.au>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, <x86@kernel.org>, "H . Peter Anvin" <hpa@zytor.com> CC: <linuxppc-dev@lists.ozlabs.org>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>, Kefeng Wang <wangkefeng.wang@huawei.com>, Xie XiuQi <xiexiuqi@huawei.com>, Guohanjun <guohanjun@huawei.com>, Tong Tiangen <tongtiangen@huawei.com> Subject: [PATCH -next v7 3/4] arm64: add uaccess to machine check safe Date: Fri, 12 Aug 2022 07:05:56 +0000 Message-ID: <20220812070557.1028499-4-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220812070557.1028499-1-tongtiangen@huawei.com> References: <20220812070557.1028499-1-tongtiangen@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemm600017.china.huawei.com (7.193.23.234) X-CFilter-Loop: Reflected ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1660287991; a=rsa-sha256; cv=none; b=OwYHTcwMxQ1NTM5gKkk37syHalj8Veq121y1UwLhpC845Z/dKh/onoCiIb+2UDqFMyYbvc RBn9p54R0lMT2GlCZwhzFaP7F87cqBBbgygVNPElJhSG0hlO0K28uI2a0dxnN27k0w/zzP oeQqV3GpGGm7/jda+essEPKLEgoXlbc= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=none; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf22.hostedemail.com: domain of tongtiangen@huawei.com designates 45.249.212.188 as permitted sender) smtp.mailfrom=tongtiangen@huawei.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1660287991; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jQKhpRFZYNSMJJ68eyFcWrh5PEMv/jS/d7zTq+MXzzs=; b=BgcnbkqG0fxlo+rVEdqTUYIuvwf2HPlwJqZEVBvUz8SOfJbAOiZPN6xKZA2kVaRrJgMa3p fmiMIqwOY5S0BtUZuKXxxdh20sFLo0Y6SBP3ilZigIBrh6liOGxt39gQj4Xg+mHz6Xk6TZ qaP8b5i+r8FJBLPO724gEZfITI6K8uw= X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: E1BF8C0165 Authentication-Results: imf22.hostedemail.com; dkim=none; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf22.hostedemail.com: domain of tongtiangen@huawei.com designates 45.249.212.188 as permitted sender) smtp.mailfrom=tongtiangen@huawei.com X-Stat-Signature: qhkcnfh64k79meg5fzfdgprj687b8imk X-Rspam-User: X-HE-Tag: 1660287990-968349 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> |
Series | arm64: add machine check safe support | expand |
diff --git a/arch/arm64/mm/extable.c b/arch/arm64/mm/extable.c index 478e639f8680..28ec35e3d210 100644 --- a/arch/arm64/mm/extable.c +++ b/arch/arm64/mm/extable.c @@ -85,10 +85,10 @@ bool fixup_exception_mc(struct pt_regs *regs) if (!ex) return false; - /* - * This is not complete, More Machine check safe extable type can - * be processed here. - */ + switch (ex->type) { + case EX_TYPE_UACCESS_ERR_ZERO: + return ex_handler_uaccess_err_zero(ex, regs); + } return false; }
If user access fail due to hardware memory error, only the relevant processes are affected, so killing the user process and isolate the error page with hardware memory errors is a more reasonable choice than kernel panic. Signed-off-by: Tong Tiangen <tongtiangen@huawei.com> --- arch/arm64/mm/extable.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)