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 1A23CC43603 for ; Sun, 15 Dec 2019 03:49:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E04D62072B for ; Sun, 15 Dec 2019 03:49:31 +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="WXIq8DfW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726551AbfLODsz (ORCPT ); Sat, 14 Dec 2019 22:48:55 -0500 Received: from mail-pl1-f193.google.com ([209.85.214.193]:45633 "EHLO mail-pl1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726081AbfLODsy (ORCPT ); Sat, 14 Dec 2019 22:48:54 -0500 Received: by mail-pl1-f193.google.com with SMTP id b22so25554pls.12 for ; Sat, 14 Dec 2019 19:48:54 -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=WXIq8DfWNNqntE5sjsiiJc8aM0hdIZ0I0iplda6l934CZG411RaQ3JmsLvd4ZSsPAk VjYR8qXVjX+ya/TxiWnNagUS9JbI2E9WjIS+Bo/Zoeoe5s22klWAobZRrAkqE1kQI/a+ qEEDNBC8F/Gn9zTTJQ5wctke9kAsLaGvcPATTj0OiwfDQbjiNqgVc6NRAgV6w5HHQvju nXzPc/OKWse1ASdw5Bo20+Cd5M3fYsP6EvU4g0PxVaQFWVB9etPtOUa8TPt362LzPf4S KyuoTqGSg5ZPwScgXEB4HF3jATmyB3piuaRI35WQJw60J4iJMFetvmQInHfPyZCObIEx TvOQ== 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=PPcgmPi0LA0fvWSAMlqr/GWBxGnvjmRjB2YBG1g8nb9ar2HTErtGdqEDHvfgsrLcrz erCLsxtA0N3zivxFV4dzSNw2+rv3HLUGKjLrBe4myZ+Fsj5N6pYeSA5dFEp6+fHgHUVR ImobVtUwfL9YSiMphywo5oL+IIYuDqY+59opXxyn9SZgZDb2xJDGJWgR4UYbr4UpZwUA +rMvW1vGjUWCmI0p/OF+TyJC2kdO6/qpaGA9jXLxR28oR+U0QQcfFRn97Uz0783bAmvG IAIeYVKF0JeHS/vj5Uf6uAyI2Mpr35MTobNZUzfXp2a+Q+8R1+IF5GdHXZOGkXf0srt4 iN0w== X-Gm-Message-State: APjAAAWkC1skmUSeFtV1lLTzTt1ptPHYHrTwkUgR5/AIrKNeBvJRa2hl XdN9eWwzFP5UMc59bUpybIuUGQ== X-Google-Smtp-Source: APXvYqzTbYlIqJ8ZOlpjDEpI4B8TCZfg8PLPqYYRQCl91Ux3tYZGqDLC2hOMJRjg9YCn8mjdYZKayw== X-Received: by 2002:a17:902:b788:: with SMTP id e8mr9090440pls.1.1576381734127; Sat, 14 Dec 2019 19:48:54 -0800 (PST) Received: from libai.bytedance.net ([61.120.150.71]) by smtp.gmail.com with ESMTPSA id e10sm17437727pfm.3.2019.12.14.19.48.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 14 Dec 2019 19:48:53 -0800 (PST) From: zhenwei pi To: arnd@arndb.de, gregkh@linuxfoundation.org, peng.hao2@zte.com.cn Cc: hutao@cn.fujitsu.com, linux-kernel@vger.kernel.org, pizhenwei@bytedance.com Subject: [PATCH v2 2/2] misc: pvpanic: add crash loaded event Date: Sun, 15 Dec 2019 11:48:40 +0800 Message-Id: <20191215034840.2273096-3-pizhenwei@bytedance.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20191215034840.2273096-1-pizhenwei@bytedance.com> References: <20191215034840.2273096-1-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