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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Oct 2025 04:55:57.9365 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7d5275d1-04dc-42e0-d633-08de11274a40 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: DB5PEPF00014B8B.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR08MB9900 On 10/21/25 17:09, Boris Brezillon wrote: > On Tue, 21 Oct 2025 15:32:45 +0100 > Akash Goel wrote: > >> On 10/19/25 04:19, Adrián Larumbe wrote: >>> Commit 33729a5fc0ca ("iommu/io-pgtable-arm: Remove split on unmap >>> behavior") did away with the treatment of partial unmaps of huge IOPTEs. >>> >> >> Sorry have a doubt. >> >> Corresponding to the commit 33729a5fc0ca, can we now remove the code to >> pre-allocate L3 page table pages i.e. 'op_ctx->rsvd_page_tables.pages' >> inside panthor_vm_prepare_unmap_op_ctx() ?. > > Well, not if we want to support partial unmaps of huge pages at a non-2M > boundary. Thanks Boris for clarifying. Sorry I didn't consider that in order to support partial unmaps of huge pages at a non-2M boundary, we still need to call panthor_vm_map_pages() so as to remap the difference between the start/end of huge page and the start/end of the actual unmap range. Best Regards Akash