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non_uniform_split_supported()
uniform_split_supported() and non_uniform_split_supported() share
significantly similar logic.
The only functional difference is that uniform_split_supported() includes
an additional check on the requested @new_order.
The reason for this check comes from the following two aspects:
* some file system or swap cache just supports order-0 folio
* the behavioral difference between uniform/non-uniform split
The behavioral difference between uniform split and non-uniform:
* uniform split splits folio directly to @new_order
* non-uniform split creates after-split folios with orders from
folio_order(folio) - 1 to new_order.
This means for non-uniform split or !new_order split we should check the
file system and swap cache respectively.
This commit unifies the logic and merge the two functions into a single
combined helper, removing redundant code and simplifying the split
support checking mechanism.
Link: https://lkml.kernel.org/r/20251106034155.21398-3-richard.weiyang@gmail.com
Fixes: c010d47f107f ("mm: thp: split huge page to any lower order pages")
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: "David Hildenbrand (Red Hat)" <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Patch series "mm/huge_memory: Define split_type and consolidate split
support checks", v3.
This two-patch series focuses on improving code clarity and removing
redundancy in the huge memory handling logic related to folio splitting.
The series is based on an original proposal to merge two significantly
identical functions that check folio split support[1]. During this
process, we found an opportunity to improve readability by explicitly
defining the split types.
Patch 1: define split_type and use it
Patch 2: merge uniform_split_supported() and non_uniform_split_supported()
This patch (of 2):
We currently handle two distinct types of large folio splitting:
* uniform split
* non-uniform split
Differentiating between these types using a simple boolean variable is not
obvious and can harm code readability.
This commit introduces enum split_type to explicitly define these two
types. Replacing the existing boolean variable with this enumeration
significantly improves code clarity and expressiveness when dealing with
folio splitting logic.
No functional change is expected.
[akpm@linux-foundation.org: tweak layout, per David]
Link: https://lkml.kernel.org/r/20251106034155.21398-1-richard.weiyang@gmail.com
Link: https://lkml.kernel.org/r/20251106034155.21398-2-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: "David Hildenbrand (Red Hat)" <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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try_folio_split_to_order(), folio_split, __folio_split(), and
__split_unmapped_folio() do not have correct kernel-doc comment format.
Fix them.
[ziy@nvidia.com: kernel-doc fixup]
Link: https://lkml.kernel.org/r/BE7AC5F3-9E64-4923-861D-C2C4E0CB91EB@nvidia.com
[ziy@nvidia.com: add newline to fix an error and a warning from docutils]
Link: https://lkml.kernel.org/r/040B38C0-23C6-4AEA-B069-69AE6DAA828B@nvidia.com
Link: https://lkml.kernel.org/r/20251031162001.670503-4-ziy@nvidia.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Barry Song <baohua@kernel.org>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jane Chu <jane.chu@oracle.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Luis Chamberalin <mcgrof@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Pankaj Raghav <kernel@pankajraghav.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Patch series "Optimize folio split in memory failure", v5.
This patchset optimizes folio split operations in memory failure code by
always splitting a folio to min_order_for_split() to minimize unusable
pages, even if min_order_for_split() is non zero and memory failure code
would take the failed path eventually for a successfully split folio.
This means instead of making the entire original folio unusable memory
failure code would only make its after-split folio, which has order of
min_order_for_split() and contains HWPoison page, unusable.
For soft offline case, since the original folio is still accessible, no
split is performed if the folio cannot be split to order-0 to prevent
potential performance loss.
In addition, add split_huge_page_to_order() to improve code readability
and fix kernel-doc comment format for folio_split() and other related
functions.
Background
==========
This patchset is a follow-up of "[PATCH v3] mm/huge_memory: do not change
split_huge_page*() target order silently."[1] and [PATCH v4]
mm/huge_memory: preserve PG_has_hwpoisoned if a folio is split to >0
order[2], since both are separated out as hotfixes. It improves how
memory failure code handles large block size(LBS) folios with
min_order_for_split() > 0. By splitting a large folio containing HW
poisoned pages to min_order_for_split(), the after-split folios without HW
poisoned pages could be freed for reuse. To achieve this, folio split
code needs to set has_hwpoisoned on after-split folios containing HW
poisoned pages and it is done in the hotfix in [2].
This patchset includes:
1. A patch adds split_huge_page_to_order(),
2. Patch 2 and Patch 3 of "[PATCH v2 0/3] Do not change split folio target
order"[3],
This patch (of 3):
When the caller does not supply a list to
split_huge_page_to_list_to_order(), use split_huge_page_to_order()
instead.
Link: https://lkml.kernel.org/r/20251031162001.670503-1-ziy@nvidia.com
Link: https://lkml.kernel.org/r/20251031162001.670503-2-ziy@nvidia.com
Link: https://lore.kernel.org/all/20251017013630.139907-1-ziy@nvidia.com/ [1]
Link: https://lore.kernel.org/all/20251023030521.473097-1-ziy@nvidia.com/ [2]
Link: https://lore.kernel.org/all/20251016033452.125479-1-ziy@nvidia.com/ [3]
Signed-off-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jane Chu <jane.chu@oracle.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Luis Chamberalin <mcgrof@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Pankaj Raghav <kernel@pankajraghav.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Currently we install pmd folio with map_anon_folio_pmd() in
__do_huge_pmd_anonymous_page() and do_huge_zero_wp_pmd(). While in
collapse_huge_page(), it is done with identical code except statistics
adjustment.
Unify the process with map_anon_folio_pmd() to install pmd folio. Split
it to map_anon_folio_pmd_pf() and map_anon_folio_pmd_nopf() to be used in
page fault or not respectively.
No functional change is intended.
[akpm@linux-foundation.org: remove unneeded map_anon_folio_pmd_nopf() stub, per Wei & David]
Link: https://lkml.kernel.org/r/20251008095453.18772-3-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: Lance Yang <lance.yang@linux.dev>
Cc: David Hildenbrand <david@redhat.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Implement migrate_vma_split_pages() to handle THP splitting during the
migration process when destination cannot allocate compound pages.
This addresses the common scenario where migrate_vma_setup() succeeds with
MIGRATE_PFN_COMPOUND pages, but the destination device cannot allocate
large pages during the migration phase.
Key changes:
- migrate_vma_split_pages(): Split already-isolated pages during migration
- Enhanced folio_split() and __split_unmapped_folio() with isolated
parameter to avoid redundant unmap/remap operations
This provides a fallback mechansim to ensure migration succeeds even when
large page allocation fails at the destination.
[matthew.brost@intel.com: add THP splitting during migration]
Link: https://lkml.kernel.org/r/20251120230825.181072-2-matthew.brost@intel.com
Link: https://lkml.kernel.org/r/20251001065707.920170-12-balbirs@nvidia.com
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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When a zone device page is split (via huge pmd folio split). The driver
callback for folio_split is invoked to let the device driver know that the
folio size has been split into a smaller order.
Provide a default implementation for drivers that do not provide this
callback that copies the pgmap and mapping fields for the split folios.
Update the HMM test driver to handle the split.
Link: https://lkml.kernel.org/r/20251001065707.920170-11-balbirs@nvidia.com
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Enhance the hmm test driver (lib/test_hmm) with support for THP pages.
A new pool of free_folios() has now been added to the dmirror device,
which can be allocated when a request for a THP zone device private page
is made.
Add compound page awareness to the allocation function during normal
migration and fault based migration. These routines also copy
folio_nr_pages() when moving data between system memory and device memory.
args.src and args.dst used to hold migration entries are now dynamically
allocated (as they need to hold HPAGE_PMD_NR entries or more).
Split and migrate support will be added in future patches in this series.
Link: https://lkml.kernel.org/r/20251001065707.920170-10-balbirs@nvidia.com
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Implement CPU fault handling for zone device THP entries through
do_huge_pmd_device_private(), enabling transparent migration of
device-private large pages back to system memory on CPU access.
When the CPU accesses a zone device THP entry, the fault handler calls the
device driver's migrate_to_ram() callback to migrate the entire large page
back to system memory.
Link: https://lkml.kernel.org/r/20251001065707.920170-9-balbirs@nvidia.com
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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MIGRATE_VMA_SELECT_COMPOUND will be used to select THP pages during
migrate_vma_setup() and MIGRATE_PFN_COMPOUND will make migrating device
pages as compound pages during device pfn migration.
migrate_device code paths go through the collect, setup and finalize
phases of migration.
The entries in src and dst arrays passed to these functions still remain
at a PAGE_SIZE granularity. When a compound page is passed, the first
entry has the PFN along with MIGRATE_PFN_COMPOUND and other flags set
(MIGRATE_PFN_MIGRATE, MIGRATE_PFN_VALID), the remaining entries
(HPAGE_PMD_NR - 1) are filled with 0's. This representation allows for
the compound page to be split into smaller page sizes.
migrate_vma_collect_hole(), migrate_vma_collect_pmd() are now THP page
aware. Two new helper functions migrate_vma_collect_huge_pmd() and
migrate_vma_insert_huge_pmd_page() have been added.
migrate_vma_collect_huge_pmd() can collect THP pages, but if for some
reason this fails, there is fallback support to split the folio and
migrate it.
migrate_vma_insert_huge_pmd_page() closely follows the logic of
migrate_vma_insert_page()
Support for splitting pages as needed for migration will follow in later
patches in this series.
Link: https://lkml.kernel.org/r/20251001065707.920170-8-balbirs@nvidia.com
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Extend core huge page management functions to handle device-private THP
entries. This enables proper handling of large device-private folios in
fundamental MM operations.
The following functions have been updated:
- copy_huge_pmd(): Handle device-private entries during fork/clone
- zap_huge_pmd(): Properly free device-private THP during munmap
- change_huge_pmd(): Support protection changes on device-private THP
- __pte_offset_map(): Add device-private entry awareness
Link: https://lkml.kernel.org/r/20251001065707.920170-4-balbirs@nvidia.com
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Change page_free to folio_free to make the folio support for
zone device-private more consistent. The PCI P2PDMA callback
has also been updated and changed to folio_free() as a result.
For drivers that do not support folios (yet), the folio is
converted back into page via &folio->page and the page is used
as is, in the current callback implementation.
Link: https://lkml.kernel.org/r/20251001065707.920170-3-balbirs@nvidia.com
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Patch series "mm: support device-private THP", v7.
This patch series introduces support for Transparent Huge Page (THP)
migration in zone device-private memory. The implementation enables
efficient migration of large folios between system memory and
device-private memory
Background
Current zone device-private memory implementation only supports PAGE_SIZE
granularity, leading to:
- Increased TLB pressure
- Inefficient migration between CPU and device memory
This series extends the existing zone device-private infrastructure to
support THP, leading to:
- Reduced page table overhead
- Improved memory bandwidth utilization
- Seamless fallback to base pages when needed
In my local testing (using lib/test_hmm) and a throughput test, the series
shows a 350% improvement in data transfer throughput and a 80% improvement
in latency
These patches build on the earlier posts by Ralph Campbell [1]
Two new flags are added in vma_migration to select and mark compound
pages. migrate_vma_setup(), migrate_vma_pages() and
migrate_vma_finalize() support migration of these pages when
MIGRATE_VMA_SELECT_COMPOUND is passed in as arguments.
The series also adds zone device awareness to (m)THP pages along with
fault handling of large zone device private pages. page vma walk and the
rmap code is also zone device aware. Support has also been added for
folios that might need to be split in the middle of migration (when the
src and dst do not agree on MIGRATE_PFN_COMPOUND), that occurs when src
side of the migration can migrate large pages, but the destination has not
been able to allocate large pages. The code supported and used
folio_split() when migrating THP pages, this is used when
MIGRATE_VMA_SELECT_COMPOUND is not passed as an argument to
migrate_vma_setup().
The test infrastructure lib/test_hmm.c has been enhanced to support THP
migration. A new ioctl to emulate failure of large page allocations has
been added to test the folio split code path. hmm-tests.c has new test
cases for huge page migration and to test the folio split path. A new
throughput test has been added as well.
The nouveau dmem code has been enhanced to use the new THP migration
capability.
mTHP support:
The patches hard code, HPAGE_PMD_NR in a few places, but the code has been
kept generic to support various order sizes. With additional refactoring
of the code support of different order sizes should be possible.
The future plan is to post enhancements to support mTHP with a rough
design as follows:
1. Add the notion of allowable thp orders to the HMM based test driver
2. For non PMD based THP paths in migrate_device.c, check to see if
a suitable order is found and supported by the driver
3. Iterate across orders to check the highest supported order for migration
4. Migrate and finalize
The mTHP patches can be built on top of this series, the key design
elements that need to be worked out are infrastructure and driver support
for multiple ordered pages and their migration.
HMM support for large folios was added in 10b9feee2d0d ("mm/hmm:
populate PFNs from PMD swap entry").
This patch (of 16)
Add routines to support allocation of large order zone device folios and
helper functions for zone device folios, to check if a folio is device
private and helpers for setting zone device data.
When large folios are used, the existing page_free() callback in pgmap is
called when the folio is freed, this is true for both PAGE_SIZE and higher
order pages.
Zone device private large folios do not support deferred split and scan
like normal THP folios.
Link: https://lkml.kernel.org/r/20251001065707.920170-1-balbirs@nvidia.com
Link: https://lkml.kernel.org/r/20251001065707.920170-2-balbirs@nvidia.com
Link: https://lore.kernel.org/linux-mm/20201106005147.20113-1-rcampbell@nvidia.com/ [1]
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Add the plumbing of GICv2 interrupt deactivation via GICV_DIR.
This requires adding a new device so that we can easily decode
the DIR address.
The deactivation itself is very similar to the GICv3 version.
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-39-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
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SPIs are specially annpying, as they can be activated on a CPU and
deactivated on another. WHich means that when an SPI is in flight
anywhere, all CPUs need to have their TDIR trap bit set.
This translates into broadcasting an IPI across all CPUs to make sure
they set their trap bit, The number of in-flight SPIs is kept in
an atomic variable so that CPUs can turn the trap bit off as soon
as possible.
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-32-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
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Deactivation via ICV_DIR_EL1 is both relatively straightforward
(we have the interrupt that needs deactivation) and really awkward.
The main issue is that the interrupt may either be in an LR on
another CPU, or ourside of any LR.
In the former case, we process the deactivation is if ot was
a write to GICD_CACTIVERn, which is already implemented as a big
hammer IPI'ing all vcpus. In the latter case, we just perform
a normal deactivation, similar to what we do for EOImode==0.
Another annoying aspect is that we need to tell the CPU owning
the interrupt that its ap_list needs laudering. We use a brand new
vcpu request to that effect.
Note that this doesn't address deactivation via the GICV MMIO view,
which will be taken care of in a later change.
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-29-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
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We currently cannot identify whether an interrupt is queued into
a LR. It wasn't needed until now, but that's about to change.
Add yet another flag to track that state.
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-9-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
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struct vgic_irq has grown over the years, in a rather bad way.
Repack it using bitfields so that the individual flags, and move
things around a bit so that it a bit smaller.
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-8-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
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Future changes will require KVM to be able to perform deactivations
by writing to the physical CPU interface. Add the corresponding
VA to the kvm_info structure, and let KVM stash it.
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-3-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
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The GICH_HCR description is missing a bunch of control bits that
control the maintenance interrupt. Add them.
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-2-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
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Update header inclusions to follow IWYU (Include What You Use)
principle.
Note that kernel.h is discouraged to be included as it's written
at the top of that file.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
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The shutdown ioctl should follow the XFS one, which use magic number 'X',
and ioctl number 125, with a uint32 as flags.
For now btrfs don't distinguish DEFAULT and LOGFLUSH flags (just like
f2fs), both will freeze the fs first (implies committing the current
transaction), setting the SHUTDOWN flag and finally thaw the fs.
For NOLOGFLUSH flag, the freeze/thaw part is skipped thus the current
transaction is aborted.
The new shutdown ioctl is hidden behind experimental features for more
testing.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Anand Jain <asj@kernel.org>
Tested-by: Anand Jain <asj@kernel.org>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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While running kernel-doc validation on linux-next, warnings were emitted
for functions in include/linux/string.h due to missing return value
documentation:
Warning: include/linux/string.h:375 No description found for return value of 'kbasename'
Warning: include/linux/string.h:560 No description found for return value of 'strstarts'
This patch adds the missing return value descriptions for both functions
and clears the related kernel-doc warnings.
Signed-off-by: Kriish Sharma <kriish.sharma2006@gmail.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://patch.msgid.link/20251118184828.2621595-1-kriish.sharma2006@gmail.com
Signed-off-by: Kees Cook <kees@kernel.org>
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Merge series from Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>:
Add support for RZ/T2H and RZ/N2H.
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Implement WARN_ONCE like WARN using BUGFLAG_ONCE.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251110115758.339309119@infradead.org
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Since we have an explicit format string, use it for the condition string
instead of frobbing it in the file string.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251110115758.097401406@infradead.org
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The existing FIELD_{GET,PREP}() macros are limited to compile-time
constants. However, it is very common to prepare or extract bitfield
elements where the bitfield mask is not a compile-time constant.
To avoid this limitation, the AT91 clock driver and several other
drivers already have their own non-const field_{prep,get}() macros.
Make them available for general use by adding them to
<linux/bitfield.h>, and improve them slightly:
1. Avoid evaluating macro parameters more than once,
2. Replace "ffs() - 1" by "__ffs()",
3. Support 64-bit use on 32-bit architectures,
4. Wire field_{get,prep}() to FIELD_{GET,PREP}() when mask is
actually constant.
This is deliberately not merged into the existing FIELD_{GET,PREP}()
macros, as people expressed the desire to keep stricter variants for
increased safety, or for performance critical paths.
Yury: use __mask withing new macros.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Crt Mori <cmo@melexis.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Acked-by: Richard Genoud <richard.genoud@bootlin.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Reviewed-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
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The BUILD_BUG_ON_MSG() check against "~0ull" works only with "unsigned
(long) long" _mask types. For constant masks, that condition is usually
met, as GENMASK() yields an UL value. The few places where the
constant mask is stored in an intermediate variable were fixed by
changing the variable type to u64 (see e.g. [1] and [2]).
However, for non-constant masks, smaller unsigned types should be valid,
too, but currently lead to "result of comparison of constant
18446744073709551615 with expression of type ... is always
false"-warnings with clang and W=1.
Hence refactor the __BF_FIELD_CHECK() helper, and factor out
__FIELD_{GET,PREP}(). The later lack the single problematic check, but
are otherwise identical to FIELD_{GET,PREP}(), and are intended to be
used in the fully non-const variants later.
[1] commit 5c667d5a5a3ec166 ("clk: sp7021: Adjust width of _m in
HWM_FIELD_PREP()")
[2] commit cfd6fb45cfaf46fa ("crypto: ccree - avoid out-of-range
warnings from clang")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://git.kernel.org/torvalds/c/5c667d5a5a3ec166 [1]
Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
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The architectures supported by this driver have a maximum of 32-bits
of address, so we don't need more than 32-bits to store the length of
control data. Change the length in struct cs_dsp_coeff_ctl to an
unsigned int instead of a size_t. Also make a corresponding trivial
change to wm_adsp.c to prevent a compiler warning.
Tested on x86_64 builds this saves at least 4 bytes per control
(another 4 bytes might be saved if the compiler was inserting padding
to align the size_t).
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20251124171536.78962-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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In the origin logic, the bpf_arch_text_poke() assume that the old and new
instructions have the same opcode. However, they can have different opcode
if we want to replace a "call" insn with a "jmp" insn.
Therefore, add the new function parameter "old_t" along with the "new_t",
which are used to indicate the old and new poke type. Meanwhile, adjust
the implement of bpf_arch_text_poke() for all the archs.
"BPF_MOD_NOP" is added to make the code more readable. In
bpf_arch_text_poke(), we still check if the new and old address is NULL to
determine if nop insn should be used, which I think is more safe.
Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Link: https://lore.kernel.org/r/20251118123639.688444-6-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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In the origin call case, if BPF_TRAMP_F_SKIP_FRAME is not set, it means
that the trampoline is not called, but "jmp".
Introduce the function bpf_trampoline_use_jmp() to check if the trampoline
is in "jmp" mode.
Do some adjustment on the "jmp" mode for the x86_64. The main adjustment
that we make is for the stack parameter passing case, as the stack
alignment logic changes in the "jmp" mode without the "rip". What's more,
the location of the parameters on the stack also changes.
Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Link: https://lore.kernel.org/r/20251118123639.688444-5-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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For now, the "nop" will be replaced with a "call" instruction when a
function is hooked by the ftrace. However, sometimes the "call" can break
the RSB and introduce extra overhead. Therefore, introduce the flag
FTRACE_OPS_FL_JMP, which indicate that the ftrace_ops should be called
with a "jmp" instead of "call". For now, it is only used by the direct
call case.
When a direct ftrace_ops is marked with FTRACE_OPS_FL_JMP, the last bit of
the ops->direct_call will be set to 1. Therefore, we can tell if we should
use "jmp" for the callback in ftrace_call_replace().
Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20251118123639.688444-2-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Move the gpib drivers out of staging and into the "real" part of the
kernel. This entails:
- Remove the gpib Kconfig menu and Makefile build rule from staging.
- Remove gpib/uapi from the header file search path in subdir-ccflags
of the gpib Makefile
- move the gpib/uapi files to include/uapi/linux
- Move the gpib tree out of staging to drivers.
- Remove the word "Linux" from the gpib Kconfig file.
- Add the gpib Kconfig menu and Makefile build rule to drivers
Signed-off-by: Dave Penkler <dpenkler@gmail.com>
Link: https://patch.msgid.link/20251117144021.23569-5-dpenkler@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Stephen Rothwell reports htmldocs warnings when merging char-misc tree:
WARNING: include/linux/firmware/intel/stratix10-svc-client.h:22 This comment
starts with '/**', but isn't a kernel-doc comment.
WARNING: include/linux/firmware/intel/stratix10-svc-client.h:184 Enum value
'COMMAND_HWMON_READTEMP' not described in enum 'stratix10_svc_command_code'
WARNING: include/linux/firmware/intel/stratix10-svc-client.h:184 Enum value
'COMMAND_HWMON_READVOLT' not described in enum 'stratix10_svc_command_code'
WARNING: include/linux/firmware/intel/stratix10-svc-client.h:307 function
parameter 'cb_arg' not described in 'async_callback_t'
Fixes: 4f49088c1625 ("firmware: stratix10-svc: Add definition for voltage and temperature sensor")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-next/20251114153920.1c5df700@canb.auug.org.au/
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://patch.msgid.link/20251114185815.358423-3-dinguyen@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/djakov/icc into char-misc-next
Georgi writes:
interconnect changes for 6.19
This pull request contains the interconnect changes for the 6.19-rc1
merge window. The core and driver changes are listed below.
Core changes:
- kbps_to_icc() macro optimization
Driver changes:
- Switch all Qualcomm RPMh interconnect drivers to use the dynamic
node IDs and drop support for non-dynamic ID allocation
- Add new driver and BWMON support for the Kaanapali SoC
- Add QoS support for the SM6350 SoC
- Add QoS support for the SA8775p SoC
- Fix missing link from SNOC_PNOC to the USB 2 on MSM8996 SoC that
includes also a dts change that has been acked by the maintainer
- Drop the QPIC interconnect and BCM nodes for the SDX75 SoC, as these
should be handled by the rpmh-clk driver
- Other misc fixes
Signed-off-by: Georgi Djakov <djakov@kernel.org>
* tag 'icc-6.19-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/djakov/icc: (40 commits)
interconnect: qcom: sm6350: enable QoS configuration
interconnect: qcom: sm6350: Remove empty BCM arrays
interconnect: qcom: icc-rpmh: Get parent's regmap for nested NoCs
dt-bindings: interconnect: qcom,sm6350-rpmh: Add clocks for QoS
dt-bindings: interconnect: qcom-bwmon: Document Kaanapali BWMONs
interconnect: qcom: icc-rpmh: drop support for non-dynamic IDS
interconnect: qcom: sm8750: convert to dynamic IDs
interconnect: qcom: sm8650: convert to dynamic IDs
interconnect: qcom: sm8550: convert to dynamic IDs
interconnect: qcom: sm8450: convert to dynamic IDs
interconnect: qcom: sm8350: convert to dynamic IDs
interconnect: qcom: sm8150: convert to dynamic IDs
interconnect: qcom: sm7150: convert to dynamic IDs
interconnect: qcom: sm6350: convert to dynamic IDs
interconnect: qcom: sdx75: convert to dynamic IDs
interconnect: qcom: sdx65: convert to dynamic IDs
interconnect: qcom: sdx55: convert to dynamic IDs
interconnect: qcom: sdm670: convert to dynamic IDs
interconnect: qcom: sc7180: convert to dynamic IDs
interconnect: qcom: sar2130p: convert to dynamic IDs
...
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/coresight/linux into char-misc-next
Suzuki writes:
coresight: Updates for Linux v6.19
The changes for Linux v6.19 include :
- Support for static TPDM
- Fixes to TMC-ETR with CATU where buffer wasn't available to CATU in perf mode
- Clean ups to the component operations to accept coresight_path
- Fixes to the ETM4x/ETM3x driver
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
* tag 'coresight-next-v6.19' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/coresight/linux:
coresight: etm4x: Remove the state_needs_restore flag
coresight: etm4x: Remove the redundant DSB
coresight: etm4x: Properly control filter in CPU idle with FEAT_TRF
coresight: etm4x: Add context synchronization before enabling trace
coresight: etm4x: Correct polling IDLE bit
coresight: etm3x: Always set tracer's device mode on target CPU
coresight: etm4x: Always set tracer's device mode on target CPU
coresight: Change device mode to atomic type
coresight: change the sink_ops to accept coresight_path
coresight: change helper_ops to accept coresight_path
coresight: tmc: add the handle of the event to the path
coresight: tpdm: remove redundant check for drvdata
coresight: tpdm: add static tpdm support
dt-bindings: arm: document the static TPDM compatible
coresight: ETR: Fix ETR buffer use-after-free issue
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Arm FEAT_SPE_FDS adds the ability to filter on the data source of a
packet using another 64-bits of event filtering control. As the existing
perf_event_attr::configN fields are all used up for SPE PMU, an
additional field is needed. Add a new 'config4' field.
Reviewed-by: Leo Yan <leo.yan@arm.com>
Tested-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: James Clark <james.clark@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>
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Add the NPU generic layer in mt76 module. NPU will be used to enable
traffic forward offloading between the MT76 NIC and the Airoha ethernet one
available on the Airoha EN7581 SoC using Netfilter Flowtable APIs.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20251017-mt76-npu-devel-v2-4-ddaa90901723@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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MT7996 driver can use both wed and wed_hif2 devices to offload traffic
from/to the wireless NIC. In the current codebase we assume to always
use the primary wed device in wed callbacks resulting in the following
crash if the hw runs wed_hif2 (e.g. 6GHz link).
[ 297.455876] Unable to handle kernel read from unreadable memory at virtual address 000000000000080a
[ 297.464928] Mem abort info:
[ 297.467722] ESR = 0x0000000096000005
[ 297.471461] EC = 0x25: DABT (current EL), IL = 32 bits
[ 297.476766] SET = 0, FnV = 0
[ 297.479809] EA = 0, S1PTW = 0
[ 297.482940] FSC = 0x05: level 1 translation fault
[ 297.487809] Data abort info:
[ 297.490679] ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
[ 297.496156] CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[ 297.501196] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[ 297.506500] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000107480000
[ 297.512927] [000000000000080a] pgd=08000001097fb003, p4d=08000001097fb003, pud=08000001097fb003, pmd=0000000000000000
[ 297.523532] Internal error: Oops: 0000000096000005 [#1] SMP
[ 297.715393] CPU: 2 UID: 0 PID: 45 Comm: kworker/u16:2 Tainted: G O 6.12.50 #0
[ 297.723908] Tainted: [O]=OOT_MODULE
[ 297.727384] Hardware name: Banana Pi BPI-R4 (2x SFP+) (DT)
[ 297.732857] Workqueue: nf_ft_offload_del nf_flow_rule_route_ipv6 [nf_flow_table]
[ 297.740254] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 297.747205] pc : mt76_wed_offload_disable+0x64/0xa0 [mt76]
[ 297.752688] lr : mtk_wed_flow_remove+0x58/0x80
[ 297.757126] sp : ffffffc080fe3ae0
[ 297.760430] x29: ffffffc080fe3ae0 x28: ffffffc080fe3be0 x27: 00000000deadbef7
[ 297.767557] x26: ffffff80c5ebca00 x25: 0000000000000001 x24: ffffff80c85f4c00
[ 297.774683] x23: ffffff80c1875b78 x22: ffffffc080d42cd0 x21: ffffffc080660018
[ 297.781809] x20: ffffff80c6a076d0 x19: ffffff80c6a043c8 x18: 0000000000000000
[ 297.788935] x17: 0000000000000000 x16: 0000000000000001 x15: 0000000000000000
[ 297.796060] x14: 0000000000000019 x13: ffffff80c0ad8ec0 x12: 00000000fa83b2da
[ 297.803185] x11: ffffff80c02700c0 x10: ffffff80c0ad8ec0 x9 : ffffff81fef96200
[ 297.810311] x8 : ffffff80c02700c0 x7 : ffffff80c02700d0 x6 : 0000000000000002
[ 297.817435] x5 : 0000000000000400 x4 : 0000000000000000 x3 : 0000000000000000
[ 297.824561] x2 : 0000000000000001 x1 : 0000000000000800 x0 : ffffff80c6a063c8
[ 297.831686] Call trace:
[ 297.834123] mt76_wed_offload_disable+0x64/0xa0 [mt76]
[ 297.839254] mtk_wed_flow_remove+0x58/0x80
[ 297.843342] mtk_flow_offload_cmd+0x434/0x574
[ 297.847689] mtk_wed_setup_tc_block_cb+0x30/0x40
[ 297.852295] nf_flow_offload_ipv6_hook+0x7f4/0x964 [nf_flow_table]
[ 297.858466] nf_flow_rule_route_ipv6+0x438/0x4a4 [nf_flow_table]
[ 297.864463] process_one_work+0x174/0x300
[ 297.868465] worker_thread+0x278/0x430
[ 297.872204] kthread+0xd8/0xdc
[ 297.875251] ret_from_fork+0x10/0x20
[ 297.878820] Code: 928b5ae0 8b000273 91400a60 f943fa61 (79401421)
[ 297.884901] ---[ end trace 0000000000000000 ]---
Fix the issue detecting the proper wed reference to use running wed
callabacks.
Fixes: 83eafc9251d6 ("wifi: mt76: mt7996: add wed tx support")
Tested-by: Daniel Pawlik <pawlik.dan@gmail.com>
Tested-by: Matteo Croce <teknoraver@meta.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20251008-wed-fixes-v1-1-8f7678583385@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Since the rework of the kernel virtual address space [1] the module area
and the kernel image are within the same 4GB area. Therefore there is no
need for the weak per cpu workaround for modules anymore. Remove it.
[1] commit c98d2ecae08f ("s390/mm: Uncouple physical vs virtual address spaces")
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Add the new rates as defined in the Infiniband spec for XDR and 8x
link width support.
Furthermore, modify the utility conversion methods accordingly.
Reference: IB Spec Release 1.8
Reviewed-by: Michael Guralnik <michaelgur@nvidia.com>
Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Link: https://patch.msgid.link/20251120-speed-8-v1-1-e6a7efef8cb8@nvidia.com
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Add device tree bindings for clock and reset unit on RK3506 SoC.
Add clock and reset IDs for RK3506 SoC.
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20251121075350.2564860-2-zhangqing@rock-chips.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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If we notice that we're renaming a file within a directory then we take
that as a sign that the user is working with the current directory and
may want a delegation to avoid extra revalidations when possible.
The nfs_request_directory_delegation() function exists within the NFS v4
module, so I add an extra flag to rename_setup() to indicate if a dentry
is being renamed within the same parent directory.
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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This patch adds a new flag: NFS_INO_REQ_DIR_DELEG to signal that a
directory wants to request a directory delegation the next time it does
a GETATTR. I have the client request a directory delegation when doing
an access, create, or unlink call since these calls indicate that a user
is working with a directory.
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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I add this to the existing GETATTR compound as an option extra step that
we can send if the "dir_deleg" flag is set to 'true'. Actually enabling
this value will happen in a later patch.
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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Create a new backchannel function to stop the backchannel server
and clear the bc_serv in transport protected under the bc_pa_lock.
Signed-off-by: Olga Kornievskaia <okorniev@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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Create a helper function for common code between rdma
and tcp backchannel handling of the backchannel request.
Make sure that access is protected by the bc_pa_lock
lock.
Signed-off-by: Olga Kornievskaia <okorniev@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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Add the at_least (i.e. 'static') decoration to the fixed-size array
parameters of the sha2 library functions. This causes clang to warn
when a too-small array of known size is passed.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: "Jason A. Donenfeld" <Jason@zx2c4.com>
Link: https://lore.kernel.org/r/20251122194206.31822-7-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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Add the at_least (i.e. 'static') decoration to the fixed-size array
parameters of the sha1 library functions. This causes clang to warn
when a too-small array of known size is passed.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: "Jason A. Donenfeld" <Jason@zx2c4.com>
Link: https://lore.kernel.org/r/20251122194206.31822-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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Add the at_least (i.e. 'static') decoration to the fixed-size array
parameters of the poly1305 library functions. This causes clang to warn
when a too-small array of known size is passed.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: "Jason A. Donenfeld" <Jason@zx2c4.com>
Link: https://lore.kernel.org/r/20251122194206.31822-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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