From nobody Thu Nov 13 12:01:36 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1579798177; cv=none; d=zohomail.com; s=zohoarc; b=CvoTjhpMo6ez2uihXnF71lvmUvm5fsqGkz77kbfwiTwnwphUj0GCE4bJN6B0g95oZy3tm0mcNwMqBmc1ob1dX9bz2esWORqPwjKIkwmmtzRgzhcjMfu9s33NkglStza4HgALKV1n2hDQI7NLYXqASxYEFbjNsi4JAvW07K6MVBQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1579798177; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=ilokD4M6W4KESd/ovh4GTzXkqb+mzMor6iNsQOCbfKU=; b=jnLjPyMPkKjqtIPG23Q0J1MoycY1iBV8nyru+mP+1DHf/ZcXC+nApt3izbVKzWWoI2//JJdthoKN1bXjP0JH1QsGGIHR/a+rYZNt2WQRmadEdN4oHJKK57Ak0pc7oChgvL2i0IE2QhYE6wimDPpGzN5qjiyGP8Kho0dZaehKAFI= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1579798177792856.2610372867906; Thu, 23 Jan 2020 08:49:37 -0800 (PST) Received: from localhost ([::1]:60938 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iuffj-0006Kl-T0 for importer@patchew.org; Thu, 23 Jan 2020 11:49:35 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52202) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iucsz-0007Yc-5g for qemu-devel@nongnu.org; Thu, 23 Jan 2020 08:51:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iucsx-0006hj-T3 for qemu-devel@nongnu.org; Thu, 23 Jan 2020 08:51:04 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:27700 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iucsx-0006hZ-Qg for qemu-devel@nongnu.org; Thu, 23 Jan 2020 08:51:03 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-373-_4OVby09OnCxDcoaqB1-xw-1; Thu, 23 Jan 2020 08:50:59 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 556611800D48; Thu, 23 Jan 2020 13:50:58 +0000 (UTC) Received: from 640k.localdomain.com (unknown [10.36.112.13]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2E0F01CB; Thu, 23 Jan 2020 13:50:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1579787463; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ilokD4M6W4KESd/ovh4GTzXkqb+mzMor6iNsQOCbfKU=; b=BlbWPgjrE6h3Spu0c40vPPQzQIRDuosrFnCXbQ9Uq/ctePrVP2iEd2HRVuDh6lPaXep+wK 6N+KCsphBTiztMwKSSsjzwGGt9M+CoJFx7VWfjvKKSrgRj+75zvsn019lrmGUOAg0I/O/+ U9v8E+tMi4fFcWmT570Xj5OB0cXyZKM= From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 03/59] pvpanic: introduce crashloaded for pvpanic Date: Thu, 23 Jan 2020 14:49:53 +0100 Message-Id: <1579787449-27599-4-git-send-email-pbonzini@redhat.com> In-Reply-To: <1579787449-27599-1-git-send-email-pbonzini@redhat.com> References: <1579787449-27599-1-git-send-email-pbonzini@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: _4OVby09OnCxDcoaqB1-xw-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: zhenwei pi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: zhenwei pi Add bit 1 for pvpanic. This bit means that guest hits a panic, but guest wants to handle error by itself. Typical case: Linux guest runs kdump in panic. It will help us to separate the abnormal reboot from normal operation. Signed-off-by: zhenwei pi Message-Id: <20200114023102.612548-2-pizhenwei@bytedance.com> Signed-off-by: Paolo Bonzini --- docs/specs/pvpanic.txt | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt index c7bbacc..bdea68a 100644 --- a/docs/specs/pvpanic.txt +++ b/docs/specs/pvpanic.txt @@ -16,8 +16,12 @@ pvpanic exposes a single I/O port, by default 0x505. On = read, the bits recognized by the device are set. Software should ignore bits it doesn't recognize. On write, the bits not recognized by the device are ignored. Software should set only bits both itself and the device recognize. -Currently, only bit 0 is recognized, setting it indicates a guest panic -has happened. + +Bit Definition +-------------- +bit 0: setting it indicates a guest panic has happened. +bit 1: named crashloaded. setting it indicates a guest panic and run + kexec to handle error by guest itself. =20 ACPI Interface -------------- --=20 1.8.3.1