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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 ED12AC2D0D2 for ; Wed, 25 Dec 2019 06:26:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B2E9720730 for ; Wed, 25 Dec 2019 06:26:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=bytedance-com.20150623.gappssmtp.com header.i=@bytedance-com.20150623.gappssmtp.com header.b="IKWFxoZD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726469AbfLYG0f (ORCPT ); Wed, 25 Dec 2019 01:26:35 -0500 Received: from mail-pj1-f66.google.com ([209.85.216.66]:37620 "EHLO mail-pj1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725847AbfLYG0e (ORCPT ); Wed, 25 Dec 2019 01:26:34 -0500 Received: by mail-pj1-f66.google.com with SMTP id m13so2063503pjb.2 for ; Tue, 24 Dec 2019 22:26:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=w0hfOFdpppNhfx4JZoVAcogfBULm51LLYT9TT+3UyFc=; b=IKWFxoZD+dOqu5/O4YmTKkIIcrMFegYbTrWZ85TsffnrcT/oRZFoVeTz6dCtGwHKEu IZfGZqNQ/gknjhEOqkrUZl4AFtfr/tNxAz6fj9/5FevohzI1+nYfAEZ7BZKkhZKpc+ih 3/mF/x6nL5CDLuUK4kC7mBGUmG/mXZwzp/HayKiqR4Rt2BZ7MG/zg8fFSjOdVGTLnMEQ IHdTRg3P6vcf3foc64LZdXCbkafpoABxqZDoJKBy0dpDbTbsArGWwzqYfA8iJ1JUAFlO vCrcPl9zZvoF/hbc5WwnzcnnbZ+dXTTbyjFRViyvSSUNkd+eFtiLuOHJKalzgaRcwdsl ZKqQ== 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:in-reply-to :references; bh=w0hfOFdpppNhfx4JZoVAcogfBULm51LLYT9TT+3UyFc=; b=lguVsBvwiMTD+D0I6cetJTtP7jqg86v2OpOB5RztB9zAr3RlwT0JEde9VE7StM824T fPpR60agdAd54zOid9xdFcxB6nTHXblit1CSsgeVG6JoOhnxkK9HEsvbD23fU58dW0Ap RWLBDZzjsLoKioQpk/FXFYTA6HWIMwMJwd12pfGcdwUs9u2eFCLgcQcinl8mwJPZcB7n iu04KWvXSJvmBfgFNsMrqrnWjX+qPaR/ksYqOl4kb6+WizMKxfmiCPYdjGUVG2/YLMWf mCnRbXlMuGMynu7a3bvhUnaGWY0i/EAhZfaR/1V44V+WOcoYLGM2bczLA3ddn9P3rvB3 lbaw== X-Gm-Message-State: APjAAAW6DwbS0NKDFmMI1K+cplpsTxbQlukWOpq9YdV9mSQcQXNsq9cj b076ixWMgFQunVRwr+rkq/tS9g== X-Google-Smtp-Source: APXvYqwzqavlyiYyx9EoEqGXqZFwYwG+aF++DGYxCfQAyvIIJbxQwOTzLpWXewtHml5Ho+ETNluQsA== X-Received: by 2002:a17:90a:a88f:: with SMTP id h15mr11396906pjq.32.1577255193466; Tue, 24 Dec 2019 22:26:33 -0800 (PST) Received: from libai.bytedance.net ([61.120.150.71]) by smtp.gmail.com with ESMTPSA id j7sm30875474pgn.0.2019.12.24.22.26.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 24 Dec 2019 22:26:33 -0800 (PST) From: zhenwei pi To: arnd@arndb.de, gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, pizhenwei@bytedance.com Subject: [PATCH v2 2/2] misc: pvpanic: add crash loaded event Date: Wed, 25 Dec 2019 14:26:22 +0800 Message-Id: <20191225062622.60453-3-pizhenwei@bytedance.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20191225062622.60453-1-pizhenwei@bytedance.com> References: <20191225062622.60453-1-pizhenwei@bytedance.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some users prefer kdump tools to generate guest kernel dumpfile, at the same time, need a out-of-band kernel panic event. Currently if booting guest kernel with 'crash_kexec_post_notifiers', QEMU will receive PVPANIC_PANICKED event and stop VM. If booting guest kernel without 'crash_kexec_post_notifiers', guest will not call notifier chain. Add PVPANIC_CRASH_LOADED bit for pvpanic event, it means that guest kernel actually hit a kernel panic, but the guest kernel wants to handle by itself. Signed-off-by: zhenwei pi --- drivers/misc/pvpanic.c | 9 ++++++++- include/uapi/misc/pvpanic.h | 1 + 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c index 3f0de3be0a19..a6e1a8983e1f 100644 --- a/drivers/misc/pvpanic.c +++ b/drivers/misc/pvpanic.c @@ -10,6 +10,7 @@ #include #include +#include #include #include #include @@ -33,7 +34,13 @@ static int pvpanic_panic_notify(struct notifier_block *nb, unsigned long code, void *unused) { - pvpanic_send_event(PVPANIC_PANICKED); + unsigned int event = PVPANIC_PANICKED; + + if (kexec_crash_loaded()) + event = PVPANIC_CRASH_LOADED; + + pvpanic_send_event(event); + return NOTIFY_DONE; } diff --git a/include/uapi/misc/pvpanic.h b/include/uapi/misc/pvpanic.h index cae69a822b25..54b7485390d3 100644 --- a/include/uapi/misc/pvpanic.h +++ b/include/uapi/misc/pvpanic.h @@ -4,5 +4,6 @@ #define __PVPANIC_H__ #define PVPANIC_PANICKED (1 << 0) +#define PVPANIC_CRASH_LOADED (1 << 1) #endif /* __PVPANIC_H__ */ -- 2.11.0