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bh=Nl4vhpfQhIyJx89i8nuCn4wVTGTo+7VCGWnMBqDbzaw=; b=mwWQIZQR/vThiLaNcdsPgIWb4qg5zDl9h/9r/9SlIcHAGizqBBbr8HWiDrVX+bCJ5GQ0xlTD9QTq+XpmXVmWIhTSnTvcVl7ja/NNa7PO9YyAiFlctM9VdSnmHAIUtEtWy2gdwTg7fQgiHTc91Q5rZm6ECnxvSG42m9TthlDYk0Y= 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 From: Huang Rui To: Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Boris Ostrovsky , =?utf-8?q?Roger_Pau_Monn?= =?utf-8?q?=C3=A9?= , , , , CC: Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , "Stewart Hildebrand" , Xenia Ragiadakou , Honglei Huang , Julia Zhang , Chen Jiqian , Huang Rui Subject: [RFC PATCH 3/5] drm/amdgpu: set passthrough mode for xen pvh/hvm Date: Sun, 12 Mar 2023 20:01:55 +0800 Message-ID: <20230312120157.452859-4-ray.huang@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230312120157.452859-1-ray.huang@amd.com> References: <20230312120157.452859-1-ray.huang@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: CO1NAM11FT018:EE_|BN9PR12MB5210:EE_ X-MS-Office365-Filtering-Correlation-Id: 75556c49-7a07-4c63-bee5-08db22f1aa4c 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: 12 Mar 2023 12:02:34.0957 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 75556c49-7a07-4c63-bee5-08db22f1aa4c 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: CO1NAM11FT018.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN9PR12MB5210 There is an second stage translation between the guest machine address and host machine address in Xen PVH/HVM. The PCI bar address in the xen guest kernel are not translated at the second stage on Xen PVH/HVM, so it's not the real physical address that hardware would like to know, so we need to set passthrough mode for Xen PVH/HVM as well. Signed-off-by: Huang Rui --- drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index f2e2cbaa7fde..7b4369eba19d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -743,7 +743,8 @@ void amdgpu_detect_virtualization(struct amdgpu_device *adev) if (!reg) { /* passthrough mode exclus sriov mod */ - if (is_virtual_machine() && !xen_initial_domain()) + if (is_virtual_machine() && + !(xen_initial_domain() && xen_pv_domain())) adev->virt.caps |= AMDGPU_PASSTHROUGH_MODE; }