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Fri, 21 Oct 2022 18:56:33 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BN8NAM11FT053.mail.protection.outlook.com (10.13.177.209) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5746.16 via Frontend Transport; Fri, 21 Oct 2022 18:56:33 +0000 Received: from ethanolx7ea3host.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Fri, 21 Oct 2022 13:56:31 -0500 From: Terry Bowman To: , , , , , CC: , , , , , , , , Subject: [PATCH 1/5] cxl/acpi: Set ACPI's CXL _OSC to indicate CXL1.1 support Date: Fri, 21 Oct 2022 13:56:11 -0500 Message-ID: <20221021185615.605233-2-terry.bowman@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221021185615.605233-1-terry.bowman@amd.com> References: <20221021185615.605233-1-terry.bowman@amd.com> 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: BN8NAM11FT053:EE_|CY5PR12MB6154:EE_ X-MS-Office365-Filtering-Correlation-Id: a0832e09-4206-4961-6717-08dab395f8e9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Oct 2022 18:56:33.3578 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a0832e09-4206-4961-6717-08dab395f8e9 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: BN8NAM11FT053.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6154 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org ACPI includes a CXL _OSC support method 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 --- 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))