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Wed, 20 Jan 2021 11:19:03 +0000 From: Mihai Carabas To: qemu-devel@nongnu.org Subject: [PATCH v4 3/4] pvpanic : update pvpanic spec document Date: Wed, 20 Jan 2021 12:31:56 +0200 Message-Id: <1611138717-1672-4-git-send-email-mihai.carabas@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1611138717-1672-1-git-send-email-mihai.carabas@oracle.com> References: <1611138717-1672-1-git-send-email-mihai.carabas@oracle.com> Content-Type: text/plain X-Originating-IP: [138.3.200.25] X-ClientProxiedBy: SN6PR16CA0062.namprd16.prod.outlook.com (2603:10b6:805:ca::39) To MWHPR1001MB2285.namprd10.prod.outlook.com (2603:10b6:301:2e::32) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mihai.localdomain (138.3.200.25) by SN6PR16CA0062.namprd16.prod.outlook.com (2603:10b6:805:ca::39) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3763.10 via Frontend Transport; Wed, 20 Jan 2021 11:19:02 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 00d0995c-36af-46ab-8fb8-08d8bd35316d X-MS-TrafficTypeDiagnostic: MWHPR10MB1342: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8273; 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envelope-from=mihai.carabas@oracle.com; helo=userp2130.oracle.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: Mihai Carabas , peter.maydell@linaro.org, kraxel@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add pvpanic PCI device support details in docs/specs/pvpanic.txt. Signed-off-by: Mihai Carabas Reviewed-by: Peter Maydell --- docs/specs/pvpanic.txt | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/docs/specs/pvpanic.txt b/docs/specs/pvpanic.txt index a90fbca..8afcde1 100644 --- a/docs/specs/pvpanic.txt +++ b/docs/specs/pvpanic.txt @@ -1,7 +1,7 @@ PVPANIC DEVICE ============== -pvpanic device is a simulated ISA device, through which a guest panic +pvpanic device is a simulated 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. @@ -9,6 +9,9 @@ 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. +The pvpanic device can be implemented as an ISA device (using IOPORT) or as a +PCI device. + ISA Interface ------------- @@ -24,6 +27,14 @@ 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. +PCI Interface +------------- + +The PCI interface is similar to the ISA interface except that it uses an MMIO +address space provided by its BAR0, 1 byte long. Any machine with a PCI bus +can enable a pvpanic device by adding '-device pvpanic-pci' to the command +line. + ACPI Interface -------------- -- 1.8.3.1