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Peter Anvin" CC: , , , , Kefeng Wang , Xie XiuQi , Guohanjun , Tong Tiangen 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: 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 --- arch/arm64/mm/extable.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) 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; } -- 2.25.1