From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3AA68CD4851 for ; Wed, 13 May 2026 04:47:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XQVHFBSeLLSRdwrdL0R8BCOPn2xo48mAH13JK+CARy0=; b=KScgAb3QcKIGP8ODMjO0zmPU0A xpeQ1JbSTYJiCCcCw3QZYB2TDmdk7UQ5FazdYWKHT99Sd2p4qZyGFeao1NfBYvm2zpxfnCN3ZC5L+ vbZ4X4aGd/ZpTPddVagACLm8DQ9whZIS3fW/NVC1Ne7xMfGqgX8m3ShdkJtWv1pZCfGN2BYV12iUX +U28YmglL3e3+TQs0V4SjUpP9xFq6X0OPXCPRyhp9UhIAClHH2zZY3Oycci5RHLTc0te8T4GtSUV7 Po3jIPhn7SbFhMZu22WDPZ9TVZ6dfUGOmZRqtMYEMLzoHaWdMiNpCDAlZXdVfAu+YEhhVM9MXBmov pcx+VGfA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wN1VR-00000001F5Y-1OV1; Wed, 13 May 2026 04:47:37 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wN1VO-00000001F2n-2ko0 for linux-arm-kernel@lists.infradead.org; Wed, 13 May 2026 04:47:35 +0000 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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260512_214734_791205_E5C8E69A X-CRM114-Status: UNSURE ( 8.57 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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