From nobody Sun Feb 8 11:26:05 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B5C7C1A254E; Sun, 11 Jan 2026 08:22:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768119759; cv=none; b=bXkHb01YrkCcYw5s+8cs/eyxzET9RDjGIxVdbrnTEj0eEqI5SYwx4S07v57E4Qa7wZsfKIVml+rRp7HIO8sjykNSN8jeIBfrB9wbBBg75q0QiNU7kLibEkx9QofGPWZcl9+EOVXB8uESUudh+4sPdCX+DSolUdEiHmUtDwhdkNg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768119759; c=relaxed/simple; bh=djQarGwsnsMGImsgSQVJ5sD5jo+ZigjiDeQZakHIJZw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MoUNbkYihg1Fr0H4racIXkEFCseMTHQxmHPQJCUloHP0H8jpLWcVkKpVhA44EaSvRY9L8UuvTHP3IL9Prd7Gffe/sdVEF4GVo3PDRXz2OQCAW9FCKLsGA38gavFIvLDceEi+Rqx4g+QJ0WZV1tHCidX2OcpH6wu1+eXJkOwBuIE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lw1lU3Ew; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lw1lU3Ew" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA77CC16AAE; Sun, 11 Jan 2026 08:22:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768119759; bh=djQarGwsnsMGImsgSQVJ5sD5jo+ZigjiDeQZakHIJZw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lw1lU3Ewc+dtv3vDYJfQvcR3SFOO3fNdQZbUcukOU8uBYk43EPjoMNLHvS+ZVTXFY kFiAwsUS0cL97IqVcj9lfrxTQhOT2vwhsvZsYZ978UiUZIG/ymSeKzXUMCvGav2t3T vM5MZTJCCtREKdgx/Ctorld3QmD4G38UlxAV/FKOUGToSqJ9W/z041Qg3ZqaKRg0C6 0pqyd0jXlvxFbMeJVINiPfxlP57E5VlMoy0DwyzLHcSHXAWp+XP+b3aDLtpYYqQcns gv9MGzAi0TPrvCroxyxabPW1rlLFsb8P84S1OTpkxsCAf7ZizWZpxO+8YyP01fxPJX jR8BRtnoVff+g== 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 , Klara Modin , "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 , Ritesh Harjani , 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 v3 05/29] arm64: introduce arch_zone_limits_init() Date: Sun, 11 Jan 2026 10:20:39 +0200 Message-ID: <20260111082105.290734-6-rppt@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260111082105.290734-1-rppt@kernel.org> References: <20260111082105.290734-1-rppt@kernel.org> 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" 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 zo= ne_limit) return min(zone_limit, memblock_end_of_DRAM() - 1) + 1; } =20 -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 =3D + max_zone_phys(DMA_BIT_MASK(32)); + +#ifdef CONFIG_ZONE_DMA + max_zone_pfns[ZONE_DMA] =3D PFN_DOWN(max_zone_phys(zone_dma_limit)); +#endif +#ifdef CONFIG_ZONE_DMA32 + max_zone_pfns[ZONE_DMA32] =3D PFN_DOWN(dma32_phys_limit); +#endif + max_zone_pfns[ZONE_NORMAL] =3D max_pfn; +} + +static void __init dma_limits_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES] =3D {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 =3D min(zone_dma_limit, U32_MAX); arm64_dma_phys_limit =3D max_zone_phys(zone_dma_limit); - max_zone_pfns[ZONE_DMA] =3D PFN_DOWN(arm64_dma_phys_limit); #endif #ifdef CONFIG_ZONE_DMA32 - max_zone_pfns[ZONE_DMA32] =3D PFN_DOWN(dma32_phys_limit); if (!arm64_dma_phys_limit) arm64_dma_phys_limit =3D dma32_phys_limit; #endif if (!arm64_dma_phys_limit) arm64_dma_phys_limit =3D PHYS_MASK + 1; - max_zone_pfns[ZONE_NORMAL] =3D max_pfn; =20 + arch_zone_limits_init(max_zone_pfns); free_area_init(max_zone_pfns); } =20 @@ -319,7 +331,7 @@ void __init bootmem_init(void) * done after the fixed reservations */ sparse_init(); - zone_sizes_init(); + dma_limits_init(); =20 /* * Reserve the CMA area after arm64_dma_phys_limit was initialised. --=20 2.51.0