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Wysocki" CC: Shyam Sundar S K , "open list:X86 PLATFORM DRIVERS" , "open list:PCI SUBSYSTEM" , , Mario Limonciello Subject: [PATCH v17 0/4] Allow drivers to influence D3 behavior for bridges Date: Wed, 6 Sep 2023 13:43:50 -0500 Message-ID: <20230906184354.45846-1-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB59:EE_|PH7PR12MB6740:EE_ X-MS-Office365-Filtering-Correlation-Id: 7d63688b-0022-488d-bae8-08dbaf0dc73e 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)(4636009)(39860400002)(376002)(346002)(136003)(396003)(1800799009)(82310400011)(186009)(451199024)(46966006)(36840700001)(40470700004)(8676002)(8936002)(4326008)(426003)(83380400001)(47076005)(36860700001)(478600001)(70586007)(70206006)(110136005)(54906003)(16526019)(2616005)(1076003)(26005)(6666004)(7696005)(336012)(41300700001)(2906002)(40460700003)(316002)(356005)(5660300002)(44832011)(81166007)(82740400003)(40480700001)(4744005)(86362001)(36756003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Sep 2023 19:16:31.4801 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7d63688b-0022-488d-bae8-08dbaf0dc73e 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: BL6PEPF0001AB59.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6740 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org D3 on PCIe root ports isn't used on Windows systems in Modern Standby. Windows uses a uPEP driver that helps to decide the policy for given ports. This series adjusts the PCI core to allow drivers to register influencing the policy and the amd-pmc driver will register. LPS0 constraints are the basis for it; which if they are added for Windows would also apply for Linux as well. Mario Limonciello (4): ACPI: x86: s2idle: Export symbol for fetching constraints for module use PCI: Add support for drivers to register optin or veto of D3 PCI: Check for changes in pci_bridge_d3_possible() when updating D3 platform/x86/amd: pmc: Report device constraints drivers/acpi/x86/s2idle.c | 1 + drivers/pci/pci.c | 172 +++++++++++++++++++++++++++-- drivers/platform/x86/amd/pmc/pmc.c | 57 ++++++++++ include/linux/pci.h | 9 ++ 4 files changed, 229 insertions(+), 10 deletions(-)