From: Ryan Roberts <ryan.roberts@arm.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Matthew Wilcox <willy@infradead.org>,
Mark Rutland <mark.rutland@arm.com>,
David Hildenbrand <david@redhat.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
John Hubbard <jhubbard@nvidia.com>, Zi Yan <ziy@nvidia.com>,
Barry Song <21cnbao@gmail.com>,
Alistair Popple <apopple@nvidia.com>,
Yang Shi <shy828301@gmail.com>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>,
linux-arm-kernel@lists.infradead.org, x86@kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v5 15/25] arm64/mm: ptep_set_wrprotect(): New layer to manage contig bit
Date: Fri, 2 Feb 2024 08:07:46 +0000 [thread overview]
Message-ID: <20240202080756.1453939-16-ryan.roberts@arm.com> (raw)
In-Reply-To: <20240202080756.1453939-1-ryan.roberts@arm.com>
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.
Tested-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
---
arch/arm64/include/asm/pgtable.h | 10 ++++++----
arch/arm64/mm/hugetlbpage.c | 2 +-
2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 2870bc12f288..4c2d6c483390 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -970,11 +970,11 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
#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;
@@ -992,7 +992,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres
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
@@ -1139,6 +1139,8 @@ void vmemmap_update_pte(unsigned long addr, pte_t *ptep, pte_t pte);
#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__ */
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index 7e74e7b67107..f6612f3e1c07 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -493,7 +493,7 @@ void huge_ptep_set_wrprotect(struct mm_struct *mm,
pte_t pte;
if (!pte_cont(READ_ONCE(*ptep))) {
- ptep_set_wrprotect(mm, addr, ptep);
+ __ptep_set_wrprotect(mm, addr, ptep);
return;
}
--
2.25.1
next prev parent reply other threads:[~2024-02-02 8:09 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-02 8:07 [PATCH v5 00/25] Transparent Contiguous PTEs for User Mappings Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 01/25] mm: Clarify the spec for set_ptes() Ryan Roberts
2024-02-12 12:03 ` David Hildenbrand
2024-02-02 8:07 ` [PATCH v5 02/25] mm: thp: Batch-collapse PMD with set_ptes() Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 03/25] mm: Make pte_next_pfn() a wrapper around pte_advance_pfn() Ryan Roberts
2024-02-12 12:14 ` David Hildenbrand
2024-02-12 14:10 ` Ryan Roberts
2024-02-12 14:29 ` David Hildenbrand
2024-02-12 21:34 ` Ryan Roberts
2024-02-13 9:54 ` David Hildenbrand
2024-02-02 8:07 ` [PATCH v5 04/25] arm/mm: Convert pte_next_pfn() to pte_advance_pfn() Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 05/25] arm64/mm: " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 06/25] powerpc/mm: " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 07/25] x86/mm: " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 08/25] mm: Remove pte_next_pfn() and replace with pte_advance_pfn() Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 09/25] arm64/mm: set_pte(): New layer to manage contig bit Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 10/25] arm64/mm: set_ptes()/set_pte_at(): " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 11/25] arm64/mm: pte_clear(): " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 12/25] arm64/mm: ptep_get_and_clear(): " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 13/25] arm64/mm: ptep_test_and_clear_young(): " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 14/25] arm64/mm: ptep_clear_flush_young(): " Ryan Roberts
2024-02-02 8:07 ` Ryan Roberts [this message]
2024-02-02 8:07 ` [PATCH v5 16/25] arm64/mm: ptep_set_access_flags(): " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 17/25] arm64/mm: ptep_get(): " Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 18/25] arm64/mm: Split __flush_tlb_range() to elide trailing DSB Ryan Roberts
2024-02-12 12:44 ` David Hildenbrand
2024-02-12 13:05 ` Ryan Roberts
2024-02-12 13:15 ` David Hildenbrand
2024-02-12 13:27 ` Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 19/25] arm64/mm: Wire up PTE_CONT for user mappings Ryan Roberts
2024-02-12 12:00 ` Mark Rutland
2024-02-12 12:59 ` Ryan Roberts
2024-02-12 13:54 ` David Hildenbrand
2024-02-12 14:45 ` Ryan Roberts
2024-02-12 15:26 ` David Hildenbrand
2024-02-12 15:34 ` Ryan Roberts
2024-02-12 16:24 ` David Hildenbrand
2024-02-13 15:29 ` Ryan Roberts
2024-02-12 15:30 ` Ryan Roberts
2024-02-12 20:38 ` Ryan Roberts
2024-02-13 10:01 ` David Hildenbrand
2024-02-13 12:06 ` Ryan Roberts
2024-02-13 12:19 ` David Hildenbrand
2024-02-13 13:06 ` Ryan Roberts
2024-02-13 13:13 ` David Hildenbrand
2024-02-13 13:20 ` Ryan Roberts
2024-02-13 13:22 ` David Hildenbrand
2024-02-13 13:24 ` Ryan Roberts
2024-02-13 13:33 ` Ard Biesheuvel
2024-02-13 13:45 ` David Hildenbrand
2024-02-13 14:02 ` Ryan Roberts
2024-02-13 14:05 ` David Hildenbrand
2024-02-13 14:08 ` Ard Biesheuvel
2024-02-13 14:21 ` Ryan Roberts
2024-02-13 12:02 ` Mark Rutland
2024-02-13 13:03 ` Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 20/25] arm64/mm: Implement new wrprotect_ptes() batch API Ryan Roberts
2024-02-13 16:31 ` Mark Rutland
2024-02-13 16:36 ` Ryan Roberts
2024-02-02 8:07 ` [PATCH v5 21/25] arm64/mm: Implement new [get_and_]clear_full_ptes() batch APIs Ryan Roberts
2024-02-13 16:43 ` Mark Rutland
2024-02-13 16:48 ` Ryan Roberts
2024-02-13 16:53 ` Mark Rutland
2024-02-02 8:07 ` [PATCH v5 22/25] mm: Add pte_batch_hint() to reduce scanning in folio_pte_batch() Ryan Roberts
2024-02-12 13:43 ` David Hildenbrand
2024-02-12 15:00 ` Ryan Roberts
2024-02-12 15:47 ` Ryan Roberts
2024-02-12 16:27 ` David Hildenbrand
2024-02-02 8:07 ` [PATCH v5 23/25] arm64/mm: Implement pte_batch_hint() Ryan Roberts
2024-02-12 13:46 ` David Hildenbrand
2024-02-13 16:54 ` Mark Rutland
2024-02-02 8:07 ` [PATCH v5 24/25] arm64/mm: __always_inline to improve fork() perf Ryan Roberts
2024-02-13 16:55 ` Mark Rutland
2024-02-02 8:07 ` [PATCH v5 25/25] arm64/mm: Automatically fold contpte mappings Ryan Roberts
2024-02-13 17:44 ` Mark Rutland
2024-02-13 18:05 ` Ryan Roberts
2024-02-08 17:34 ` [PATCH v5 00/25] Transparent Contiguous PTEs for User Mappings Mark Rutland
2024-02-09 8:54 ` Ryan Roberts
2024-02-09 22:16 ` David Hildenbrand
2024-02-09 23:52 ` Ryan Roberts
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