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Wysocki" CC: , , Len Brown , Jonathan Cameron , "Davidlohr Bueso" , Dave Jiang , Robert Richter , Terry Bowman , , Subject: [PATCH v3 9/9] cxl/acpi: Set ACPI's CXL _OSC to indicate CXL1.1 support Date: Wed, 9 Nov 2022 11:40:59 +0100 Message-ID: <20221109104059.766720-10-rrichter@amd.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221109104059.766720-1-rrichter@amd.com> References: <20221109104059.766720-1-rrichter@amd.com> MIME-Version: 1.0 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: BN8NAM11FT105:EE_|PH7PR12MB5687:EE_ X-MS-Office365-Filtering-Correlation-Id: 323ab923-8b23-4f2a-e6da-08dac23f0151 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:(13230022)(4636009)(39860400002)(376002)(136003)(396003)(346002)(451199015)(36840700001)(46966006)(40470700004)(82310400005)(478600001)(54906003)(81166007)(110136005)(6666004)(356005)(316002)(47076005)(2906002)(40480700001)(26005)(4326008)(8676002)(70586007)(70206006)(82740400003)(7416002)(2616005)(36756003)(8936002)(41300700001)(5660300002)(16526019)(186003)(1076003)(83380400001)(40460700003)(426003)(336012)(36860700001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Nov 2022 10:41:48.6750 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 323ab923-8b23-4f2a-e6da-08dac23f0151 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: BN8NAM11FT105.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB5687 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org From: Terry Bowman ACPI includes a CXL _OSC support procedure to communicate the available CXL support to FW. The CXL support _OSC includes a field to indicate CXL1.1 RCH RCD support. The OS sets this bit to 1 if it supports access to RCD and RCH Port registers.[1] FW can potentially change it's operation depending on the _OSC support setting reported by the OS. The ACPI driver does not currently set the ACPI _OSC support to indicate CXL1.1 RCD RCH support. Change the capability reported to include CXL1.1. [1] CXL3.0 Table 9-26 'Interpretation of CXL _OSC Support Field' Signed-off-by: Terry Bowman Signed-off-by: Robert Richter Acked-by: Rafael J. Wysocki --- drivers/acpi/pci_root.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index c8385ef54c37..094a59b216ae 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -492,6 +492,7 @@ static u32 calculate_cxl_support(void) u32 support; support = OSC_CXL_2_0_PORT_DEV_REG_ACCESS_SUPPORT; + support |= OSC_CXL_1_1_PORT_REG_ACCESS_SUPPORT; if (pci_aer_available()) support |= OSC_CXL_PROTOCOL_ERR_REPORTING_SUPPORT; if (IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE))