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Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH V1] accel/amdxdna: Require carveout when PASID and force_iova are disabled Content-Language: en-US To: Mario Limonciello , , , , CC: , , References: <20260604195459.2423279-1-lizhi.hou@amd.com> From: Lizhi Hou In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN2PEPF000055DE:EE_|DS0PR12MB7802:EE_ X-MS-Office365-Filtering-Correlation-Id: dba46b96-2f17-43a7-d345-08dec31e9e91 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700016|82310400026|376014|6133799003|22082099003|18002099003|11063799006|4143699003|56012099006; X-Microsoft-Antispam-Message-Info: FAY38n64G/RZN91Ez/ePqdVeIYMI8lEPc1yy/lriYZeEmhJqNki6noocDTyEbfxYaF20JxtjSMC3Qjo6lN3SlA6NZlRZKICNRmREUizkX8A6pc5K8SpZzkvH/Xt8qOBFebvsYTKLVwTSyIAwpt/pCSLRxSvAfb9X5BMXe3dwBJ22KY0R9xVEVXpFiP0YorDcDVymv5uBk1zCbHjmQly2pnDkCsP5K7JAT1wCFs7380r5vfFkbXjpJATCBnypfEs9KvYkuzbUp94HjuW4/IeikwVk8dDt9iwmlBpmMLoKpUWUeAvL9spQGQY5/i278ssIgeo/QBPLukS8R3zWon3tp86QtreTy242xZIiNpkBGP+uKQZjtvLBJGT3SQPWUqMVZVD+OpWAkOou6KbkB+IY82bBnRBR79XtfUMieD0MjbfAn7QxKIdDQ0kVNNYjYbDZ8yM9nkuAtxxnJNQi4DA3ilf+POFHUUbWD6MggRT7o6LZRKDKOUkryAI+8Su3Do7hgr/h4+3Mlk7VhImjsAaWkKbsXZpExhDvKTmUzg2z9aTfLSL7klLjgurFcr32Gd9jM4WROCWEFh4wG8izEpB6QQb1o7P0BsNhETGPyC8LvLGl5B70W3hCJ8caAF4YgDz1AD1mcJSwkyuOZdgY7Xguxt/cHz2IhntqyW7CNHRsctwZq0mYNQeM6jzTjB8wGHEGg24pnseh1tkq8T6vel89786FKGOGAX7mBATtz+wwbVQ= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb08.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(36860700016)(82310400026)(376014)(6133799003)(22082099003)(18002099003)(11063799006)(4143699003)(56012099006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: v+tnQUM3vYgtmUBwI5h7BgB9kx/WWR1JgOqIwrkuyvaQOWo7XUge50jQRB6OlAhVA20UNktTEXNo5qCse7lINMokf9+QBBKBiX9YNPUCYh0t7sk5LUAmcRZhvM2d4EIXX/RfK6zfWgxpbQK33wCoSAVhQkdg1wSzHCxBSlih2IpVi5rRJ2GwtVWPg4J7YqX0P6iMmQvRNvcyTYYeCVH+6SrDrqAywzL3QEMegWY/D9nthvfQ2kCzzR76ZOcNLBCKGZK/meCXxk5CtGm70z5qBTQHkFgyfPfwfYLELUWERXYD2z4h1pWi/X/oOvQ9dOy50KwP1MBC/GxtPdPtoQtLqh6gPXZAoG93wlIduX2nM7SJeVhXjM4wqwo0uTBfj7WXLr9UpRRPuapif8kS+ug7sNbRGxfw36BnPoLr7t+bjKmxlVSBGuf5IiFtQa90p8Ax X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Jun 2026 16:22:20.9555 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: dba46b96-2f17-43a7-d345-08dec31e9e91 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000055DE.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7802 Applied to drm-misc-next-fixes On 6/4/26 12:56, Mario Limonciello wrote: > > > On 6/4/26 14:54, Lizhi Hou wrote: >> When both PASID and force_iova are disabled, carveout memory should be >> used. Reject buffer allocations that cannot use carveout memory in this >> configuration and return an error. >> >> Fixes: 3cc5d7a59519 ("accel/amdxdna: Add carveout memory support for >> non-IOMMU systems") >> Signed-off-by: Lizhi Hou > Reviewed-by: Mario Limonciello (AMD) >> --- >>   drivers/accel/amdxdna/amdxdna_pci_drv.c | 8 +++++++- >>   1 file changed, 7 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/accel/amdxdna/amdxdna_pci_drv.c >> b/drivers/accel/amdxdna/amdxdna_pci_drv.c >> index c677293c1ae7..1f066ed8d236 100644 >> --- a/drivers/accel/amdxdna/amdxdna_pci_drv.c >> +++ b/drivers/accel/amdxdna/amdxdna_pci_drv.c >> @@ -120,8 +120,14 @@ static int amdxdna_drm_open(struct drm_device >> *ddev, struct drm_file *filp) >>         if (!amdxdna_iova_on(xdna)) { >>           /* No need to fail open since user may use pa + carveout >> later. */ >> -        if (amdxdna_sva_init(client)) >> +        if (amdxdna_sva_init(client)) { >>               XDNA_WARN(xdna, "PASID not available for pid %d", >> client->pid); >> +            if (!amdxdna_use_carveout(xdna)) { >> +                XDNA_ERR(xdna, "PASID unavailable and carveout not >> configured"); >> +                kfree(client); >> +                return -EINVAL; >> +            } >> +        } >>       } >>       mmgrab(client->mm); >>       init_srcu_struct(&client->hwctx_srcu); >