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linux
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tools
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testing
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vma
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include
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custom.h
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tools/testing/vma: separate out vma_internal.h into logical headers The vma_internal.h file is becoming entirely unmanageable. It combines duplicated kernel implementation logic that needs to be kept in-sync with the kernel, stubbed out declarations that we simply ignore for testing purposes and custom logic added to aid testing. If we separate each of the three things into separate headers it makes things far more manageable, so do so: * include/stubs.h contains the stubbed declarations, * include/dup.h contains the duplicated kernel declarations, and * include/custom.h contains declarations customised for testing. [lorenzo.stoakes@oracle.com: avoid a duplicate struct define] Link: https://lkml.kernel.org/r/1e032732-61c3-485c-9aa7-6a09016fefc1@lucifer.local Link: https://lkml.kernel.org/r/dd57baf5b5986cb96a167150ac712cbe804b63ee.1769097829.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Zi Yan <ziy@nvidia.com> Cc: Damien Le Moal <dlemoal@kernel.org> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Jarkko Sakkinen <jarkko@kernel.org> Cc: Yury Norov <ynorov@nvidia.com> Cc: Chris Mason <clm@fb.com> Cc: Pedro Falcato <pfalcato@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-22 16:06:21 +00:00
tools/testing/vma: add VMA userland tests for VMA flag functions Now we have the capability to test the new helpers for the bitmap VMA flags in userland, do so. We also update the Makefile such that both VMA (and while we're here) mm_struct flag sizes can be customised on build. We default to 128-bit to enable testing of flags above word size even on 64-bit systems. We add userland tests to ensure that we do not regress VMA flag behaviour with the introduction when using bitmap VMA flags, nor accidentally introduce unexpected results due to for instance higher bit values not being correctly cleared/set. As part of this change, make __mk_vma_flags() a custom function so we can handle specifying invalid VMA bits. This is purposeful so we can have the VMA tests work at lower and higher number of VMA flags without having to duplicate code too much. Link: https://lkml.kernel.org/r/7fe6afe9c8c61e4d3cfc9a2d50a5d24da8528e68.1769097829.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Zi Yan <ziy@nvidia.com> Cc: Damien Le Moal <dlemoal@kernel.org> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Jarkko Sakkinen <jarkko@kernel.org> Cc: Yury Norov <ynorov@nvidia.com> Cc: Chris Mason <clm@fb.com> Cc: Pedro Falcato <pfalcato@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-22 16:06:22 +00:00
mm: move vma_mmu_pagesize() from hugetlb to vma.c vma_mmu_pagesize() is also queried on non-hugetlb VMAs and does not really belong into hugetlb.c. PPC64 provides a custom overwrite with CONFIG_HUGETLB_PAGE, see arch/powerpc/mm/book3s64/slice.c, so we cannot easily make this a static inline function. So let's move it to vma.c and add some proper kerneldoc. To make vma tests happy, add a simple vma_kernel_pagesize() stub in tools/testing/vma/include/custom.h. Link: https://lkml.kernel.org/r/20260309151901.123947-3-david@kernel.org Signed-off-by: David Hildenbrand (Arm) <david@kernel.org> Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Cc: "Christophe Leroy (CS GROUP)" <chleroy@kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jann Horn <jannh@google.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@suse.com> Cc: Muchun Song <muchun.song@linux.dev> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Pedro Falcato <pfalcato@suse.de> Cc: Suren Baghdasaryan <surenb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-03-09 16:18:59 +01:00
