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Tsirkin" , CC: Huang Rui , Jiqian Chen Subject: [RFC QEMU PATCH v8 1/2] virtio-pci: only reset pm state during resetting Date: Thu, 28 Mar 2024 18:39:02 +0800 Message-ID: <20240328103903.408290-2-Jiqian.Chen@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240328103903.408290-1-Jiqian.Chen@amd.com> References: <20240328103903.408290-1-Jiqian.Chen@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9D6:EE_|PH7PR12MB7986:EE_ X-MS-Office365-Filtering-Correlation-Id: 51fcaef2-1ee4-45df-1bfe-08dc4f13566d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230031)(1800799015)(36860700004)(82310400014)(376005); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Mar 2024 10:39:25.1794 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 51fcaef2-1ee4-45df-1bfe-08dc4f13566d X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9D6.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7986 Received-SPF: permerror client-ip=2a01:111:f403:2416::601; envelope-from=Jiqian.Chen@amd.com; helo=NAM11-CO1-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Fix bug imported by 27ce0f3afc9dd25d21b43bbce505157afd93d111 (fix Power Management Control Register for PCI Express virtio devices) Only state of PM_CTRL is writable. Only when flag VIRTIO_PCI_FLAG_INIT_PM is set, need to reset state. Signed-off-by: Jiqian Chen --- hw/virtio/virtio-pci.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index eaaf86402cfa..05dd03758d9f 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -2448,10 +2448,16 @@ static void virtio_pci_bus_reset_hold(Object *obj) virtio_pci_reset(qdev); if (pci_is_express(dev)) { + VirtIOPCIProxy *proxy = VIRTIO_PCI(dev); + pcie_cap_deverr_reset(dev); pcie_cap_lnkctl_reset(dev); - pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0); + if (proxy->flags & VIRTIO_PCI_FLAG_INIT_PM) { + pci_word_test_and_clear_mask( + dev->config + dev->exp.pm_cap + PCI_PM_CTRL, + PCI_PM_CTRL_STATE_MASK); + } } } -- 2.34.1