From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 76D382FDC3C for ; Wed, 13 May 2026 04:47:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778647650; cv=none; b=IEqIMOp4QTiKaRjVYSlzUvXzC3T6LLOPF4Cpq39E5sov0JCUIeGYwwRQI5P2bKsSDsPwP5dRB18xu6Vkwm5uVv1/sSU1qMdnuMMe69e8YeD/zxw1snLJG27wFGh9klHDtazsTi+Ec0fq1O4hpnMJqY2c1ZWiXNAOgsTdEy5AOKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778647650; c=relaxed/simple; bh=iOSPl55Bxk6YfqCKxXO93syHE1k8ylFOL8zG5k+VWfg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qF4NrzZk3OmVjHTFXlwQooVhKk7mlm3WvUDXQgAkVNUAcq8ouBVXfEdyFa6RFcYT02ixUQS9iLyeIIKY2kxrbBS/nkPYILV+Z9IAD5wmgd/iZSynyA6DbynsFl6xk5jRWIRmDfn28Lee0sUIHKrET6YWB4qQbNqGxrfx+Jj4mzQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=fypoJlnY; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="fypoJlnY" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9E4951CE0; Tue, 12 May 2026 21:47:23 -0700 (PDT) Received: from a085714.blr.arm.com (a085714.arm.com [10.164.18.87]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 995D73F7B4; Tue, 12 May 2026 21:47:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1778647648; bh=iOSPl55Bxk6YfqCKxXO93syHE1k8ylFOL8zG5k+VWfg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fypoJlnYx1WM9LUZPlxzbewydDqBg7qQn8k61MYWm0J/mlRh7a7H8DqUhaOBte4DX TeryiXPOVIXihT08YvxL3ggERzQkj+AYv2G9eIm44I+OKgIcdVbkYIR+hKiX7tyiYL EO/9qQEd//kdJLokCKezxf+tnz/DQCM3Aei1wj2c= From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Cc: Anshuman Khandual , Catalin Marinas , Will Deacon , Ryan Roberts , Mark Rutland , Lorenzo Stoakes , Andrew Morton , David Hildenbrand , Mike Rapoport , Linu Cherian , Usama Arif , 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 Message-ID: <20260513044547.4128549-12-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260513044547.4128549-1-anshuman.khandual@arm.com> References: <20260513044547.4128549-1-anshuman.khandual@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Override pgprot_[read|write]() accessors using pxxval_[get|set]() providing required single copy atomic operation for vma->vm_page_prot. Cc: Catalin Marinas Cc: Will Deacon Cc: Ryan Roberts Cc: Mark Rutland Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- 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