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=-3.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no 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 A0F71C2BA17 for ; Mon, 6 Apr 2020 15:53:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B5DA248E6 for ; Mon, 6 Apr 2020 15:53:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dTtf3Lcu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729075AbgDFPxg (ORCPT ); Mon, 6 Apr 2020 11:53:36 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:37659 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728945AbgDFPxg (ORCPT ); Mon, 6 Apr 2020 11:53:36 -0400 Received: by mail-pf1-f194.google.com with SMTP id u65so7723565pfb.4; Mon, 06 Apr 2020 08:53:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=PvwW/9sQV91GxFUMxx/QXPp3Z+S4dWs0vj3Jf2cw5SI=; b=dTtf3LcuHq9DVSUmTHwwFyk0GqNwJ8mmft/rvyPrytkiB+AE7if1Ewt4ZChTfA9cwa urTa9BVMKk/fjtxmdlXnZ+UrSYyLSK9CBgax/QDFF/cOGdoy2EHOTcNkjmQ/LbTLsPeE XyXvdVn8Sd2KiANJECpKl2aO3BCUkqtIp93IZb9M/sK7VrEqBM4RBHwotf52k+tAgh89 /BARescvH5q+Jid5Y7T4jb/+mktcyTP7C3A9yRplOJXKMJ9Ib28xpnew2k1qr2LdkUbF rdeUy1niAO9oA27ZDtaVtz5bi7oyUWH5atxERg7CSNPJTp9S4AeBVsaHkmwfJ9hxcP1k m73g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=PvwW/9sQV91GxFUMxx/QXPp3Z+S4dWs0vj3Jf2cw5SI=; b=c8MMQo3l/+Gi5QdD9IDbFqVLPOXJgGEZ6gpbJSxjWuCNG9tI0kufCsRaGseZKgOWJ5 D+DagIJkwQ1x4KSFJIJXJJA/GLWsyWzzG/BjBUfG2Z/O22+HVf/LfeHrylAg5ISxodch OOBF3tQqvC/kib8E6WT9kE1Y1zEEQx3h1+4k1fCzwFNm/MWkFv/p4ncQZ7TBD4+55R/2 URy4iRK9ij5b4GuITjkooSkeSUrCIRiMhCsp1/Ii7Z/wuLA96PbbN0d4aWfoaEy9/uRH CZsLbMJKxpyW6y356gScWRg1mu+aCxWubvkEYiVtXejh0n7JKxWvWfwOU3r3VJMHqUPt OBOw== X-Gm-Message-State: AGi0PuYkqCK5Ei2kmEEwf4S1eMSQ/lNCdALoONGimY4yuAfDsPkaf2Al +6/J/6HGA1eZvzm+h2yHvxj1d9+b X-Google-Smtp-Source: APiQypLlXZ9/q2dQeTVcu9eqF5ReVI3oGbpaCb79uKaT6u+hpkBbBGhfqjEIbl7GsUqZMbAn53jo+Q== X-Received: by 2002:aa7:9f12:: with SMTP id g18mr120263pfr.262.1586188415045; Mon, 06 Apr 2020 08:53:35 -0700 (PDT) Received: from localhost.corp.microsoft.com ([131.107.160.210]) by smtp.googlemail.com with ESMTPSA id 79sm11823275pfz.23.2020.04.06.08.53.34 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 06 Apr 2020 08:53:34 -0700 (PDT) From: ltykernel@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, liuwe@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, arnd@arndb.de, michael.h.kelley@microsoft.com Cc: Tianyu Lan , linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, vkuznets@redhat.com Subject: [PATCH V4 0/6] x86/Hyper-V: Panic code path fixes Date: Mon, 6 Apr 2020 08:53:25 -0700 Message-Id: <20200406155331.2105-1-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.14.5 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tianyu Lan This patchset fixes some issues in the Hyper-V panic code path. Patch 1 resolves issue that panic system still responses network packets. Patch 2-3,5-6 resolves crash enlightenment issues. Patch 4 is to set crash_kexec_post_notifiers to true for Hyper-V VM in order to report crash data or kmsg to host before running kdump kernel. Tianyu Lan (6): x86/Hyper-V: Unload vmbus channel in hv panic callback x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump x86/Hyper-V: Trigger crash enlightenment only once during 0;136;0c0;136;0c system crash. x86/Hyper-V: Report crash register data or kmsg before running crash kernel x86/Hyper-V: Report crash register data when sysctl_record_panic_msg is not set x86/Hyper-V: Report crash data in die() when panic_on_oops is set arch/x86/hyperv/hv_init.c | 6 +++- arch/x86/kernel/cpu/mshyperv.c | 10 +++++++ drivers/hv/channel_mgmt.c | 3 ++ drivers/hv/vmbus_drv.c | 62 ++++++++++++++++++++++++++++++------------ include/asm-generic/mshyperv.h | 2 +- 5 files changed, 63 insertions(+), 20 deletions(-) -- 2.14.5