From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Anshuman Khandual <anshuman.khandual@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Ryan Roberts <ryan.roberts@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Linu Cherian <linu.cherian@arm.com>,
Usama Arif <usama.arif@linux.dev>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [RFC V2 11/14] arm64/mm: Override read-write accessors for vm_page_prot
Date: Wed, 13 May 2026 10:15:44 +0530 [thread overview]
Message-ID: <20260513044547.4128549-12-anshuman.khandual@arm.com> (raw)
In-Reply-To: <20260513044547.4128549-1-anshuman.khandual@arm.com>
Override pgprot_[read|write]() accessors using pxxval_[get|set]() providing
required single copy atomic operation for vma->vm_page_prot.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
Changes in RFC V2:
- Dropped _once from pgprot_read/write() per Mike
- Renamed all ptdesc_ instances as pxxval_ instead
arch/arm64/include/asm/pgtable.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 4065b68e8d79..c9457d133ae9 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -122,6 +122,18 @@ static inline pgd_t pgdp_get(pgd_t *pgdp)
return pxxval_get(*pgdp);
}
+#define pgprot_read pgprot_read
+static inline pgprot_t pgprot_read(pgprot_t *prot)
+{
+ return pxxval_get(*prot);
+}
+
+#define pgprot_write pgprot_write
+static inline void pgprot_write(pgprot_t *prot, pgprot_t val)
+{
+ pxxval_set(*prot, val);
+}
+
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
--
2.43.0
next prev parent reply other threads:[~2026-05-13 4:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-13 4:45 [RFC V2 00/14] arm64/mm: Enable 128 bit page table entries Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 01/14] mm: Abstract printing of pxd_val() Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 02/14] mm: Add read-write accessors for vm_page_prot Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 03/14] arm64/mm: Convert READ_ONCE() as pmdp_get() while accessing PMD Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 04/14] arm64/mm: Convert READ_ONCE() as pudp_get() while accessing PUD Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 05/14] arm64/mm: Convert READ_ONCE() as p4dp_get() while accessing P4D Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 06/14] arm64/mm: Convert READ_ONCE() as pgdp_get() while accessing PGD Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 07/14] arm64/mm: Route all pgtable reads via pxxval_get() Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 08/14] arm64/mm: Route all pgtable writes via pxxval_set() Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 09/14] arm64/mm: Route all pgtable atomics to central helpers Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 10/14] arm64/mm: Abstract printing of pxd_val() Anshuman Khandual
2026-05-13 4:45 ` Anshuman Khandual [this message]
2026-05-13 4:45 ` [RFC V2 13/14] arm64/mm: Add an abstraction level for tlbi_op Anshuman Khandual
2026-05-13 4:45 ` [RFC V2 14/14] arm64/mm: Add initial support for FEAT_D128 page tables Anshuman Khandual
2026-05-13 9:39 ` [RFC V2 00/14] arm64/mm: Enable 128 bit page table entries Lorenzo Stoakes
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