From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF0F071444 for ; Mon, 18 Dec 2023 17:23:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="kddJd4V4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB19AC433C7; Mon, 18 Dec 2023 17:23:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1702920212; bh=AR+Hg+mqixf9WUP6shoBeBIxjiQ7uZPNeHZpBGS0U4Y=; h=Date:To:From:Subject:From; b=kddJd4V4OaVUatj2/CMnuaYpdP0YbAdw7q4ji9jnPzVCTOOzjxsWyyzPjXL1BFO3N MsUIWGG0UDtu3yFUdhPqn0t1ieO0PVNpL+Yu9+y6q0t3O9E4v06J22pT9FvYJh2rj8 xfzrG4rzzh9OE12ElMl3+PRXNrB+a9GPmp4l4le8= Date: Mon, 18 Dec 2023 09:23:31 -0800 To: mm-commits@vger.kernel.org,ziy@nvidia.com,yuzhao@google.com,yuzenghui@huawei.com,willy@infradead.org,will@kernel.org,wangkefeng.wang@huawei.com,vincenzo.frascino@arm.com,suzuki.poulose@arm.com,shy828301@gmail.com,ryabinin.a.a@gmail.com,oliver.upton@linux.dev,maz@kernel.org,mark.rutland@arm.com,jhubbard@nvidia.com,james.morse@arm.com,glider@google.com,dvyukov@google.com,david@redhat.com,catalin.marinas@arm.com,ardb@kernel.org,apopple@nvidia.com,anshuman.khandual@arm.com,andreyknvl@gmail.com,21cnbao@gmail.com,ryan.roberts@arm.com,akpm@linux-foundation.org From: Andrew Morton Subject: + arm64-mm-ptep_set_wrprotect-new-layer-to-manage-contig-bit.patch added to mm-unstable branch Message-Id: <20231218172331.EB19AC433C7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: arm64/mm: ptep_set_wrprotect(): new layer to manage contig bit has been added to the -mm mm-unstable branch. Its filename is arm64-mm-ptep_set_wrprotect-new-layer-to-manage-contig-bit.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/arm64-mm-ptep_set_wrprotect-new-layer-to-manage-contig-bit.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Ryan Roberts Subject: arm64/mm: ptep_set_wrprotect(): new layer to manage contig bit Date: Mon, 18 Dec 2023 10:50:54 +0000 Create a new layer for the in-table PTE manipulation APIs. For now, The existing API is prefixed with double underscore to become the arch-private API and the public API is just a simple wrapper that calls the private API. The public API implementation will subsequently be used to transparently manipulate the contiguous bit where appropriate. But since there are already some contig-aware users (e.g. hugetlb, kernel mapper), we must first ensure those users use the private API directly so that the future contig-bit manipulations in the public API do not interfere with those existing uses. Link: https://lkml.kernel.org/r/20231218105100.172635-11-ryan.roberts@arm.com Signed-off-by: Ryan Roberts Tested-by: John Hubbard Cc: Alexander Potapenko Cc: Alistair Popple Cc: Andrey Konovalov Cc: Andrey Ryabinin Cc: Anshuman Khandual Cc: Ard Biesheuvel Cc: Barry Song <21cnbao@gmail.com> Cc: Catalin Marinas Cc: David Hildenbrand Cc: Dmitry Vyukov Cc: James Morse Cc: Kefeng Wang Cc: Marc Zyngier Cc: Mark Rutland Cc: Matthew Wilcox Cc: Oliver Upton Cc: Suzuki Poulouse Cc: Vincenzo Frascino Cc: Will Deacon Cc: Yang Shi Cc: Yu Zhao Cc: Zenghui Yu Cc: Zi Yan Signed-off-by: Andrew Morton --- arch/arm64/include/asm/pgtable.h | 10 ++++++---- arch/arm64/mm/hugetlbpage.c | 2 +- 2 files changed, 7 insertions(+), 5 deletions(-) --- a/arch/arm64/include/asm/pgtable.h~arm64-mm-ptep_set_wrprotect-new-layer-to-manage-contig-bit +++ a/arch/arm64/include/asm/pgtable.h @@ -958,11 +958,11 @@ static inline pmd_t pmdp_huge_get_and_cl #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ /* - * ptep_set_wrprotect - mark read-only while trasferring potential hardware + * __ptep_set_wrprotect - mark read-only while trasferring potential hardware * dirty status (PTE_DBM && !PTE_RDONLY) to the software PTE_DIRTY bit. */ -#define __HAVE_ARCH_PTEP_SET_WRPROTECT -static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long address, pte_t *ptep) +static inline void __ptep_set_wrprotect(struct mm_struct *mm, + unsigned long address, pte_t *ptep) { pte_t old_pte, pte; @@ -980,7 +980,7 @@ static inline void ptep_set_wrprotect(st static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long address, pmd_t *pmdp) { - ptep_set_wrprotect(mm, address, (pte_t *)pmdp); + __ptep_set_wrprotect(mm, address, (pte_t *)pmdp); } #define pmdp_establish pmdp_establish @@ -1120,6 +1120,8 @@ extern void ptep_modify_prot_commit(stru #define ptep_test_and_clear_young __ptep_test_and_clear_young #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH #define ptep_clear_flush_young __ptep_clear_flush_young +#define __HAVE_ARCH_PTEP_SET_WRPROTECT +#define ptep_set_wrprotect __ptep_set_wrprotect #endif /* !__ASSEMBLY__ */ --- a/arch/arm64/mm/hugetlbpage.c~arm64-mm-ptep_set_wrprotect-new-layer-to-manage-contig-bit +++ a/arch/arm64/mm/hugetlbpage.c @@ -493,7 +493,7 @@ void huge_ptep_set_wrprotect(struct mm_s pte_t pte; if (!pte_cont(READ_ONCE(*ptep))) { - ptep_set_wrprotect(mm, addr, ptep); + __ptep_set_wrprotect(mm, addr, ptep); return; } _ Patches currently in -mm which might be from ryan.roberts@arm.com are mm-allow-deferred-splitting-of-arbitrary-anon-large-folios.patch mm-non-pmd-mappable-large-folios-for-folio_add_new_anon_rmap.patch mm-thp-introduce-multi-size-thp-sysfs-interface.patch mm-thp-introduce-multi-size-thp-sysfs-interface-fix.patch mm-thp-support-allocation-of-anonymous-multi-size-thp.patch mm-thp-support-allocation-of-anonymous-multi-size-thp-fix.patch selftests-mm-kugepaged-restore-thp-settings-at-exit.patch selftests-mm-factor-out-thp-settings-management.patch selftests-mm-support-multi-size-thp-interface-in-thp_settings.patch selftests-mm-khugepaged-enlighten-for-multi-size-thp.patch selftests-mm-cow-generalize-do_run_with_thp-helper.patch selftests-mm-cow-add-tests-for-anonymous-multi-size-thp.patch mm-thp-batch-collapse-pmd-with-set_ptes.patch mm-batch-copy-pte-ranges-during-fork.patch mm-batch-clear-pte-ranges-during-zap_pte_range.patch arm64-mm-set_pte-new-layer-to-manage-contig-bit.patch arm64-mm-set_ptes-set_pte_at-new-layer-to-manage-contig-bit.patch arm64-mm-pte_clear-new-layer-to-manage-contig-bit.patch arm64-mm-ptep_get_and_clear-new-layer-to-manage-contig-bit.patch arm64-mm-ptep_test_and_clear_young-new-layer-to-manage-contig-bit.patch arm64-mm-ptep_clear_flush_young-new-layer-to-manage-contig-bit.patch arm64-mm-ptep_set_wrprotect-new-layer-to-manage-contig-bit.patch arm64-mm-ptep_set_access_flags-new-layer-to-manage-contig-bit.patch arm64-mm-ptep_get-new-layer-to-manage-contig-bit.patch arm64-mm-split-__flush_tlb_range-to-elide-trailing-dsb.patch arm64-mm-wire-up-pte_cont-for-user-mappings.patch arm64-mm-implement-new-helpers-to-optimize-fork.patch arm64-mm-implement-clear_ptes-to-optimize-exit-munmap-dontneed.patch selftests-mm-log-run_vmtestssh-results-in-tap-format.patch