From nobody Mon Feb 9 23:18:21 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1543232525242335.74970109354695; Mon, 26 Nov 2018 03:42:05 -0800 (PST) Received: from localhost ([::1]:35316 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gRFH1-0007Sb-NQ for importer@patchew.org; Mon, 26 Nov 2018 06:41:55 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56924) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gRF8o-0000Rp-2R for qemu-devel@nongnu.org; Mon, 26 Nov 2018 06:33:30 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gRF8k-000225-Dv for qemu-devel@nongnu.org; Mon, 26 Nov 2018 06:33:24 -0500 Received: from out1.zte.com.cn ([202.103.147.172]:56582 helo=mxct.zte.com.cn) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gRF8c-0001uW-Ah; Mon, 26 Nov 2018 06:33:14 -0500 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id 1F7F48C353C489583040; Mon, 26 Nov 2018 19:33:12 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id wAQBX3fM031875; Mon, 26 Nov 2018 19:33:03 +0800 (GMT-8) (envelope-from peng.hao2@zte.com.cn) Received: from localhost.localdomain.localdomain ([10.74.120.59]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2018112619331147-13057804 ; Mon, 26 Nov 2018 19:33:11 +0800 From: Peng Hao To: peter.maydell@linaro.org, drjones@redhat.com, philmd@redhat.com Date: Tue, 27 Nov 2018 03:56:02 +0800 Message-Id: <1543262162-6351-10-git-send-email-peng.hao2@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1543262162-6351-1-git-send-email-peng.hao2@zte.com.cn> References: <1543262162-6351-1-git-send-email-peng.hao2@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2018-11-26 19:33:11, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2018-11-26 19:33:03, Serialize complete at 2018-11-26 19:33:03 X-MAIL: mse01.zte.com.cn wAQBX3fM031875 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 202.103.147.172 Subject: [Qemu-devel] [PATCH V9 9/9] pvpanic : update pvpanic document X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peng Hao , qemu-arm@nongnu.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add mmio support info in docs/specs/pvpanic.txt. Signed-off-by: Peng Hao --- docs/specs/pvpanic.txt | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt index c7bbacc..67f5591 100644 --- a/docs/specs/pvpanic.txt +++ b/docs/specs/pvpanic.txt @@ -1,14 +1,18 @@ PVPANIC DEVICE =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =20 -pvpanic device is a simulated ISA device, through which a guest panic -event is sent to qemu, and a QMP event is generated. This allows +pvpanic device is a simulated ISA/SysBus device, through which a guest +panic event is sent to qemu, and a QMP event is generated. This allows management apps (e.g. libvirt) to be notified and respond to the event. =20 The management app has the option of waiting for GUEST_PANICKED events, and/or polling for guest-panicked RunState, to learn when the pvpanic device has fired a panic event. =20 +When pvpanic device is implemented as a ISA device, it supports IOPORT +mode. Since QEMU v3.2 pvpanic also supports MMIO mode, it will be +implemented as a SYSBUS device. + ISA Interface ------------- =20 @@ -19,6 +23,13 @@ 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. =20 +SYSBUS Interface +---------------- + +The SYSBUS interface is similar to the ISA interface except that it uses +MMIO. For example, the arm virt machine could put the pvpanic device at +[0x9070000, 0x9070001] and currently only the first byte is used. + ACPI Interface -------------- =20 --=20 1.8.3.1