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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 74EEED25030 for ; Sun, 11 Jan 2026 08:25:14 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D98F86B00AD; Sun, 11 Jan 2026 03:25:13 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D70136B00AE; Sun, 11 Jan 2026 03:25:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C7C816B00AF; Sun, 11 Jan 2026 03:25:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id B748F6B00AD for ; Sun, 11 Jan 2026 03:25:13 -0500 (EST) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 85F155882F for ; Sun, 11 Jan 2026 08:25:13 +0000 (UTC) X-FDA: 84318998106.03.AFF4ABF Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf25.hostedemail.com (Postfix) with ESMTP id C4EA6A0011 for ; Sun, 11 Jan 2026 08:25:11 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=NJT6JCU7; spf=pass (imf25.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1768119912; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=a/l0u3Hxe5VmGHjW0jp1QC8gVmA78/lu+jqaojRNk7Q=; b=EUwcl3j9zN6ti5Wc+IsWfAN1X6Jrw1HBoJdyQc8Z06A2N0CaitCcO+GhdJDjruQircfKPQ /XBry7QHSHLD5qph/nVPyrlvUt+po7qM2DuBFfEf2qWolLstDRjAooj4BSH8E4kdnnStqz ZxS1eCEf5GcBaSZPpt0vgJR9MMeZQ2s= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=NJT6JCU7; spf=pass (imf25.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1768119912; a=rsa-sha256; cv=none; b=Y9uJsS4EAj0IfHiQSCNuiNr8+JLYMUMKqrHdRevaMeBmC8KySWLgpWtUCeP0EMeGYKoKrZ u17NzDrkSFzewsHYxkXmIhQg/NX2ED65bpPMd1bwsJ9LJJdMOkp4h56lJxgLTvuroD0Y5w FMwNI8BO/TU54UvDqf2J5vD4tuWpGJY= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id B72CD40D98; Sun, 11 Jan 2026 08:25:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F417AC4CEF7; Sun, 11 Jan 2026 08:24:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768119910; bh=XLJkxze/zRljNiS2gjyXo20G7bby5TmrPlX4304F60E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NJT6JCU7l1lxqyEUTX5FYSwW/ezRfbB5BhOsON2tIsFgcB6KzvRLR+VnOfjUnNUli 1Df8EMUsXpuMWNMEAA9p52WCryPzuB9RbNl4/dSrDVNn62F060YueIkx8RUqzMLl6f BhWB9bOPubZIrl7G5M3hr3fwWW14Tf1pPvDElI9X6i/zDAFVSfmNKdnay9gRKvt/PL Xp0l0kOl1v0LyjjDmg+r8L2t3wr9KtSAMNHGmCC+QweHEL3NWWYl1TRj4kT+Dh+ak9 au2MTE1nA096UC962hgd53ExdFcUsGJJZA+dyB8GHK3x3h15Sno3iINFa4dPcVEyf+ kN9pkH6svLtFQ== 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 15/29] powerpc: introduce arch_zone_limits_init() Date: Sun, 11 Jan 2026 10:20:49 +0200 Message-ID: <20260111082105.290734-16-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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: sprnis3axqy57wfrfsjod1wwij1q8q7u X-Rspam-User: X-Rspamd-Queue-Id: C4EA6A0011 X-Rspamd-Server: rspam08 X-HE-Tag: 1768119911-850902 X-HE-Meta: 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 pkZvkLGB cmHYghT1GEwgnq8W3Q5muLIurfyeLpnIODNhD4RHT/+SSsODvKk2ZE2hbZ12c9CkNSdVj6mAvHJhDE/h8ppEHKiZeVHdGfRHM5bpsfzLyIC8XyV32F34iA83XKJWz5XvB2qJgVexOCXN9ZZEN3jg8czH0gCPKyZ/AI2+ENgnCFzCvbsXjSn4+I9xnSGwHTHryavpRozuU7aFFPhHcugbJXJiDlbLwTBYpKgkv8S882wtJmUR0GmtxeXV2Se18p/5XxEVB9aV2Z90qWpPHDO4dNiQvoM4jyzTipLAAzKPivnm+mPzoSszgeHslMq5cNuaBMIjpBd5it0IzQ7noPHNlCEc1p91bHb8MEY/A X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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. Signed-off-by: Mike Rapoport (Microsoft) --- arch/powerpc/mm/mem.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 3ddbfdbfa941..03c05ec56041 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -221,13 +221,23 @@ static int __init mark_nonram_nosave(void) * anyway) will take a first dip into ZONE_NORMAL and get otherwise served by * ZONE_DMA. */ -static unsigned long max_zone_pfns[MAX_NR_ZONES]; +void __init arch_zone_limits_init(unsigned long *max_zone_pfns) +{ +#ifdef CONFIG_ZONE_DMA + max_zone_pfns[ZONE_DMA] = min((zone_dma_limit >> PAGE_SHIFT) + 1, max_low_pfn); +#endif + max_zone_pfns[ZONE_NORMAL] = max_low_pfn; +#ifdef CONFIG_HIGHMEM + max_zone_pfns[ZONE_HIGHMEM] = max_pfn; +#endif +} /* * paging_init() sets up the page tables - in fact we've already done this. */ void __init paging_init(void) { + unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0 }; unsigned long long total_ram = memblock_phys_mem_size(); phys_addr_t top_of_ram = memblock_end_of_DRAM(); int zone_dma_bits; @@ -259,15 +269,7 @@ void __init paging_init(void) zone_dma_limit = DMA_BIT_MASK(zone_dma_bits); -#ifdef CONFIG_ZONE_DMA - max_zone_pfns[ZONE_DMA] = min(max_low_pfn, - 1UL << (zone_dma_bits - PAGE_SHIFT)); -#endif - max_zone_pfns[ZONE_NORMAL] = max_low_pfn; -#ifdef CONFIG_HIGHMEM - max_zone_pfns[ZONE_HIGHMEM] = max_pfn; -#endif - + arch_zone_limits_init(max_zone_pfns); free_area_init(max_zone_pfns); mark_nonram_nosave(); -- 2.51.0