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=1579794692; cv=none; d=zohomail.com; s=zohoarc; b=MNAlHVYTbvXmCXt5AAPEyGwc606UvUU3hmsbJSWg3aecfQWewqR6Tj2GQdRD0Kuzu7JFmGxIi3bcjT9aXkR1ywF09FAJb0KNyHyagK71zaWVWF8gHYT+ePOi+/7/4psyWTT5GdeQ1ipVBQpjiUf+sG9HjQ4xTjJrGtrE7fr/GXs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1579794692; 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=PPTdeRCRi0tlQK/tEkcE+Riv/JlR1YXbPbZK0rsXdY8=; b=QWtsa0fMLjqroFj6+PThDnfBlxLnj47hX9Sw7/mpzr0Tnsx4jRY1B3FZlCL8MXGsItJ9yPaheAMaIG2NdrLs+yZVXOo1I+f/gLkXuzdNQt3GtKNPVoO1L+GXpM+XiFmRcoYFupmpsOWPfx4zgsF4B9Y7UZnJVipk42qLcNM0wEc= 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 1579794692961705.2083399104096; Thu, 23 Jan 2020 07:51:32 -0800 (PST) Received: from localhost ([::1]:59774 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iuelX-0001Se-Gq for importer@patchew.org; Thu, 23 Jan 2020 10:51:31 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52219) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iuct0-0007bI-Ul for qemu-devel@nongnu.org; Thu, 23 Jan 2020 08:51:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iucsz-0006l3-C8 for qemu-devel@nongnu.org; Thu, 23 Jan 2020 08:51:06 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:39425 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iucsz-0006kU-96 for qemu-devel@nongnu.org; Thu, 23 Jan 2020 08:51:05 -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-388-tVaR__ASNOS7g1nPAed_2Q-1; Thu, 23 Jan 2020 08:51:00 -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 CADA08010DA; Thu, 23 Jan 2020 13:50:59 +0000 (UTC) Received: from 640k.localdomain.com (unknown [10.36.112.13]) by smtp.corp.redhat.com (Postfix) with ESMTP id C792A1CB; Thu, 23 Jan 2020 13:50:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1579787464; 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=PPTdeRCRi0tlQK/tEkcE+Riv/JlR1YXbPbZK0rsXdY8=; b=bDhr1awJPimTT1n1+GEdelFPrCuUp+zddrAyRS8BXG1AB/E5bDwE3SpVqvB5XRbY38WsKA CbWs46+Ivya2KcRdBOpZ2ZPnHgwHu3yJieONhVNRtOrkxsZgq3kdoTibhlaF/hV7fN7MXm J7gvCeBBzTuXEURQdzYPC8Kha6IdGug= From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 04/59] pvpanic: implement crashloaded event handling Date: Thu, 23 Jan 2020 14:49:54 +0100 Message-Id: <1579787449-27599-5-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: tVaR__ASNOS7g1nPAed_2Q-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: 205.139.110.120 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 Handle bit 1 write, then post event to monitor. Suggested by Paolo, declear a new event, using GUEST_PANICKED could cause upper layers to react by shutting down or rebooting the guest. In advance for extention, add GuestPanicInformation in event message. Signed-off-by: zhenwei pi Message-Id: <20200114023102.612548-3-pizhenwei@bytedance.com> Signed-off-by: Paolo Bonzini --- docs/specs/pvpanic.txt | 16 ++++++++-------- hw/misc/pvpanic.c | 11 +++++++++-- include/sysemu/runstate.h | 1 + qapi/run-state.json | 24 ++++++++++++++++++++++-- vl.c | 12 ++++++++++++ 5 files changed, 52 insertions(+), 12 deletions(-) diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt index bdea68a..a90fbca 100644 --- a/docs/specs/pvpanic.txt +++ b/docs/specs/pvpanic.txt @@ -19,9 +19,10 @@ Software should set only bits both itself and the device= recognize. =20 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. +bit 0: a guest panic has happened and should be processed by the host +bit 1: a guest panic has happened and will be handled by the guest; + the host should record it or report it, but should not affect + the execution of the guest. =20 ACPI Interface -------------- @@ -30,13 +31,12 @@ pvpanic device is defined with ACPI ID "QEMU0001". Cust= om methods: =20 RDPT: To determine whether guest panic notification is supported. Arguments: None -Return: Returns a byte, bit 0 set to indicate guest panic - notification is supported. Other bits are reserved and - should be ignored. +Return: Returns a byte, with the same semantics as the I/O port + interface. =20 WRPT: To send a guest panic event -Arguments: Arg0 is a byte, with bit 0 set to indicate guest panic has - happened. Other bits are reserved and should be cleared. +Arguments: Arg0 is a byte to be written, with the same semantics as + the I/O interface. Return: None =20 The ACPI device will automatically refer to the right port in case it diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c index d65ac86..4ebda78 100644 --- a/hw/misc/pvpanic.c +++ b/hw/misc/pvpanic.c @@ -21,11 +21,13 @@ #include "hw/qdev-properties.h" #include "hw/misc/pvpanic.h" =20 -/* The bit of supported pv event */ +/* The bit of supported pv event, TODO: include uapi header and remove thi= s */ #define PVPANIC_F_PANICKED 0 +#define PVPANIC_F_CRASHLOADED 1 =20 /* The pv event value */ #define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED) +#define PVPANIC_CRASHLOADED (1 << PVPANIC_F_CRASHLOADED) =20 #define ISA_PVPANIC_DEVICE(obj) \ OBJECT_CHECK(PVPanicState, (obj), TYPE_PVPANIC) @@ -34,7 +36,7 @@ static void handle_event(int event) { static bool logged; =20 - if (event & ~PVPANIC_PANICKED && !logged) { + if (event & ~(PVPANIC_PANICKED | PVPANIC_CRASHLOADED) && !logged) { qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", ev= ent); logged =3D true; } @@ -43,6 +45,11 @@ static void handle_event(int event) qemu_system_guest_panicked(NULL); return; } + + if (event & PVPANIC_CRASHLOADED) { + qemu_system_guest_crashloaded(NULL); + return; + } } =20 #include "hw/isa/isa.h" diff --git a/include/sysemu/runstate.h b/include/sysemu/runstate.h index 0b41555..f760094 100644 --- a/include/sysemu/runstate.h +++ b/include/sysemu/runstate.h @@ -63,6 +63,7 @@ ShutdownCause qemu_reset_requested_get(void); void qemu_system_killed(int signal, pid_t pid); void qemu_system_reset(ShutdownCause reason); void qemu_system_guest_panicked(GuestPanicInformation *info); +void qemu_system_guest_crashloaded(GuestPanicInformation *info); =20 #endif =20 diff --git a/qapi/run-state.json b/qapi/run-state.json index d7477cd..b83a436 100644 --- a/qapi/run-state.json +++ b/qapi/run-state.json @@ -357,16 +357,36 @@ 'data': { 'action': 'GuestPanicAction', '*info': 'GuestPanicInformation'= } } =20 ## +# @GUEST_CRASHLOADED: +# +# Emitted when guest OS crash loaded is detected +# +# @action: action that has been taken, currently always "run" +# +# @info: information about a panic +# +# Since: 5.0 +# +# Example: +# +# <- { "event": "GUEST_CRASHLOADED", +# "data": { "action": "run" } } +# +## +{ 'event': 'GUEST_CRASHLOADED', + 'data': { 'action': 'GuestPanicAction', '*info': 'GuestPanicInformation'= } } + +## # @GuestPanicAction: # # An enumeration of the actions taken when guest OS panic is detected # # @pause: system pauses # -# Since: 2.1 (poweroff since 2.8) +# Since: 2.1 (poweroff since 2.8, run since 5.0) ## { 'enum': 'GuestPanicAction', - 'data': [ 'pause', 'poweroff' ] } + 'data': [ 'pause', 'poweroff', 'run' ] } =20 ## # @GuestPanicInformationType: diff --git a/vl.c b/vl.c index 71d3e7e..9f5f477 100644 --- a/vl.c +++ b/vl.c @@ -1468,6 +1468,18 @@ void qemu_system_guest_panicked(GuestPanicInformatio= n *info) } } =20 +void qemu_system_guest_crashloaded(GuestPanicInformation *info) +{ + qemu_log_mask(LOG_GUEST_ERROR, "Guest crash loaded"); + + qapi_event_send_guest_crashloaded(GUEST_PANIC_ACTION_RUN, + !!info, info); + + if (info) { + qapi_free_GuestPanicInformation(info); + } +} + void qemu_system_reset_request(ShutdownCause reason) { if (no_reboot && reason !=3D SHUTDOWN_CAUSE_SUBSYSTEM_RESET) { --=20 1.8.3.1