From nobody Fri Dec 19 08:04:44 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 71C0F12AAD7 for ; Thu, 15 Feb 2024 10:32:30 +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=1707993152; cv=none; b=P1kDGAlHTh8gAGGpwJt/seqShl2H7Q76bHqMe323OGEndj5dk1dZy8JJl2ptTBFoJVYo/iEXnlWQPC9DLyfE9fO8jU4J6OV7FOZn4dcdyGXj7zw1l4lHWZqL9JIvqouahe8C5E2gm5cORkHz+IJRxcjqLMzWO+A/4nr3EMIhvnA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707993152; c=relaxed/simple; bh=f9J310tQ1bNpyfSQ928lGyLybpb8KOoR/8xzLYJEgEk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=TqCyAeHphWpLmoofEzi8E9V1mTmwwG545uZZpH1wEabXDB/FsaIpFsyAY1GUqpWKIU088UjSqKY1gz0GBucC1wkib/rXXhgQ2sn/sE4PVL9J7r6qVQ+9g8jWlP/Jg+lm8gEmANIihaq242LtGsYsygrS3iWLlyuAmaiApZ9z4mM= 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; 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 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 149FD14BF; Thu, 15 Feb 2024 02:33:11 -0800 (PST) Received: from e125769.cambridge.arm.com (e125769.cambridge.arm.com [10.1.196.26]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0B7CA3F7B4; Thu, 15 Feb 2024 02:32:26 -0800 (PST) From: Ryan Roberts To: Catalin Marinas , Will Deacon , Ard Biesheuvel , Marc Zyngier , James Morse , Andrey Ryabinin , Andrew Morton , Matthew Wilcox , Mark Rutland , David Hildenbrand , Kefeng Wang , John Hubbard , Zi Yan , Barry Song <21cnbao@gmail.com>, Alistair Popple , Yang Shi , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Cc: Ryan Roberts , 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 v6 03/18] mm: Introduce pte_advance_pfn() and use for pte_next_pfn() Date: Thu, 15 Feb 2024 10:31:50 +0000 Message-Id: <20240215103205.2607016-4-ryan.roberts@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240215103205.2607016-1-ryan.roberts@arm.com> References: <20240215103205.2607016-1-ryan.roberts@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: quoted-printable Content-Type: text/plain; charset="utf-8" The goal is to be able to advance a PTE by an arbitrary number of PFNs. So introduce a new API that takes a nr param. Define the default implementation here and allow for architectures to override. pte_next_pfn() becomes a wrapper around pte_advance_pfn(). Follow up commits will convert each overriding architecture's pte_next_pfn() to pte_advance_pfn(). Signed-off-by: Ryan Roberts Acked-by: David Hildenbrand --- include/linux/pgtable.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 231370e1b80f..b7ac8358f2aa 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -212,14 +212,17 @@ static inline int pmd_dirty(pmd_t pmd) #define arch_flush_lazy_mmu_mode() do {} while (0) #endif =20 - #ifndef pte_next_pfn -static inline pte_t pte_next_pfn(pte_t pte) +#ifndef pte_advance_pfn +static inline pte_t pte_advance_pfn(pte_t pte, unsigned long nr) { - return __pte(pte_val(pte) + (1UL << PFN_PTE_SHIFT)); + return __pte(pte_val(pte) + (nr << PFN_PTE_SHIFT)); } #endif =20 +#define pte_next_pfn(pte) pte_advance_pfn(pte, 1) +#endif + #ifndef set_ptes /** * set_ptes - Map consecutive pages to a contiguous range of addresses. --=20 2.25.1