From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5F3052D3A6A for ; Fri, 2 Jan 2026 07:01:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=172.234.252.31 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767337284; cv=none; b=TH4uK/DRbsWqoHnUGUOk2PBcRiRQeSATr3tay38pVmzZyduxFT/85+5HC5Uh2JhwDnhZi4xyrBDA91dArARVHilUETLAJKGw3SC6FLZi93KR3eFpQoRwg830+v6v2MSC/mFU5T7FdppSSKqERllebVxJiTBW1MQGu7oIHtz0HLc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767337284; c=relaxed/simple; bh=djQarGwsnsMGImsgSQVJ5sD5jo+ZigjiDeQZakHIJZw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tfxxQ17MujmyIFC33yUwfG+nWI8pXI6DXqNf+4n2fsV0J069/5hJorxV1OO6UoWDcKXt0j0Un9GtGwZooJYqMxweczva7PVh29how3s4g+emugBvOqxCoCqBm3sfYWZtldcPyjsCX9SKzvK8VqVzwyi1CM7gdXGBxHOWUTAAIic= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YfFbGR66; arc=none smtp.client-ip=172.234.252.31 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YfFbGR66" Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 063C7439EC; Fri, 2 Jan 2026 07:01:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0E256C116B1; Fri, 2 Jan 2026 07:01:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767337281; bh=djQarGwsnsMGImsgSQVJ5sD5jo+ZigjiDeQZakHIJZw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YfFbGR66VHayErTkQoIoUIc4G3/Zokhn15LvFAqjzKw26utOu1LBn48hs2H6HzNQq enWDeSBA/K3oa8124S39Ky2QzRfQWKFy5skfNoCEkG9sz9vKEVoMX6gEHdOtbCXbst YovEdBmAC4uGLaHGNAqP3BqXeZF+EKxoW8SDO9IcHD6qwesn+Gli/x6/TpHAYsUlrD UCxGtUCULcfUxhXrs9KtImo/ip7nUbo9TQd43s1ekjsaSWhD1ejl+EXFJWf86KxJTp WhffTvUE+ThhBNL4rEwUFZ6nXbB9jltND/rGE7Zw/xtewRIoZJM55k7N+y1oDTnXyg wl/J8tjy8RWJQ== From: Mike Rapoport To: Andrew Morton Cc: Alex Shi , Alexander Gordeev , Andreas Larsson , Borislav Petkov , Brian Cain , "Christophe Leroy (CS GROUP)" , Catalin Marinas , "David S. Miller" , Dave Hansen , David Hildenbrand , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , Heiko Carstens , Helge Deller , Huacai Chen , Ingo Molnar , Johannes Berg , John Paul Adrian Glaubitz , Jonathan Corbet , "Liam R. Howlett" , Lorenzo Stoakes , Magnus Lindholm , Matt Turner , Max Filippov , Michael Ellerman , Michal Hocko , Michal Simek , Mike Rapoport , Muchun Song , Oscar Salvador , Palmer Dabbelt , Pratyush Yadav , Richard Weinberger , Russell King , Stafford Horne , Suren Baghdasaryan , Thomas Bogendoerfer , Thomas Gleixner , Vasily Gorbik , Vineet Gupta , Vlastimil Babka , Will Deacon , x86@kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-cxl@vger.kernel.org, linux-doc@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-um@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org Subject: [PATCH v2 04/28] arm64: introduce arch_zone_limits_init() Date: Fri, 2 Jan 2026 08:59:40 +0200 Message-ID: <20260102070005.65328-5-rppt@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260102070005.65328-1-rppt@kernel.org> References: <20260102070005.65328-1-rppt@kernel.org> Precedence: bulk X-Mailing-List: linux-m68k@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "Mike Rapoport (Microsoft)" Move calculations of zone limits to a dedicated arch_zone_limits_init() function. Later MM core will use this function as an architecture specific callback during nodes and zones initialization and thus there won't be a need to call free_area_init() from every architecture. While on it rename zone_sizes_init() to dma_limits_init() to better reflect what that function does. Signed-off-by: Mike Rapoport (Microsoft) --- arch/arm64/mm/init.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 524d34a0e921..06815d34cc11 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -118,7 +118,21 @@ static phys_addr_t __init max_zone_phys(phys_addr_t zone_limit) return min(zone_limit, memblock_end_of_DRAM() - 1) + 1; } -static void __init zone_sizes_init(void) +void __init arch_zone_limits_init(unsigned long *max_zone_pfns) +{ + phys_addr_t __maybe_unused dma32_phys_limit = + max_zone_phys(DMA_BIT_MASK(32)); + +#ifdef CONFIG_ZONE_DMA + max_zone_pfns[ZONE_DMA] = PFN_DOWN(max_zone_phys(zone_dma_limit)); +#endif +#ifdef CONFIG_ZONE_DMA32 + max_zone_pfns[ZONE_DMA32] = PFN_DOWN(dma32_phys_limit); +#endif + max_zone_pfns[ZONE_NORMAL] = max_pfn; +} + +static void __init dma_limits_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES] = {0}; phys_addr_t __maybe_unused acpi_zone_dma_limit; @@ -139,17 +153,15 @@ static void __init zone_sizes_init(void) if (memblock_start_of_DRAM() < U32_MAX) zone_dma_limit = min(zone_dma_limit, U32_MAX); arm64_dma_phys_limit = max_zone_phys(zone_dma_limit); - max_zone_pfns[ZONE_DMA] = PFN_DOWN(arm64_dma_phys_limit); #endif #ifdef CONFIG_ZONE_DMA32 - max_zone_pfns[ZONE_DMA32] = PFN_DOWN(dma32_phys_limit); if (!arm64_dma_phys_limit) arm64_dma_phys_limit = dma32_phys_limit; #endif if (!arm64_dma_phys_limit) arm64_dma_phys_limit = PHYS_MASK + 1; - max_zone_pfns[ZONE_NORMAL] = max_pfn; + arch_zone_limits_init(max_zone_pfns); free_area_init(max_zone_pfns); } @@ -319,7 +331,7 @@ void __init bootmem_init(void) * done after the fixed reservations */ sparse_init(); - zone_sizes_init(); + dma_limits_init(); /* * Reserve the CMA area after arm64_dma_phys_limit was initialised. -- 2.51.0