From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej2-f43.google.com (mail-ej2-f43.google.com [74.125.228.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BCB193B6C0C for ; Sun, 27 Sep 2026 21:43:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.228.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790545427; cv=none; b=IK9o0tRw9gazt+p3EYYQ/nXgfsoYABjlpH6ryvZvQim6yVPG9e6guBs7+3ca+yn3uPxJU9vfzkT1cT6Ro/nylUY4HP4kbhl/db6l2ZTeH5Fiyhu8y1X17j7jI8Ctgd0+OWDSZ+6tDgiu4EcNR4JQ5+QTiXoJniP61xG0KvZZ7Qk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790545427; c=relaxed/simple; bh=L01dxEkesUBA3VBO8737+O0T4hT4GIFzjrZLjQXI62s=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bmkr+yfgxPNudopKuXnvL5vV6J1/PHwJWThKkaYq4MbgwBqEbRVgEYGwW/sKu1ANZh88n6aOVivEEI46FoGEtW81PpNen1cQ64lxbRHFf9XKam0x7vsiH/HQAV6S9hxkRKnlB0N/OMdFikGTM1H5CQHluC8xHRqcjInJLeRfjVg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=f83Hp21Q; arc=none smtp.client-ip=74.125.228.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="f83Hp21Q" Received: by mail-ej2-f43.google.com with SMTP id a640c23a62f3a-c2a8b9acbc6so334691766b.0 for ; Sun, 27 Sep 2026 14:43:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1790545424; x=1791150224; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=YmHZZ2mWny07hG6UzfEwL1BdtLA8PVUAlm+jdgUs4YI=; b=f83Hp21Qt21KyLDykyMppfPdAOIc6/Ax7YRJG7N2udJ6zu7vgW2f+69A2/Mb4OeCdi WN2RDdroBwIDF7w1G7Jt38+xzTTVIYuSnLw2JIGqo6tG/XWBwUoZb1vEi8Oso5+zs8XL pumrZ6MGSlOL0XqyM7A8gzhPu2CYPWalwK3xi035hd3sceH0o7Q30sD6Sii9qYCuyuyx QaJy/PEkJMZbn8gFnAwdMjJMH9xZ3atDdjAdrB/IRwCUdcHWiaMdiSyacI4EtGY5yf0d 3cgnD4cHnCgSKjXXY0N+dWSFsyqryPIC8w1E0Krh1XNYdft9RzoBj1pFBIaDof+mVi0Z 7zdQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790545424; x=1791150224; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=YmHZZ2mWny07hG6UzfEwL1BdtLA8PVUAlm+jdgUs4YI=; b=Qyxi9EikfIJeGFqZd4LDIpfy5/wscowEHk2HHD7LTOpuBwZW6jQuGLoS5CT4VAX0hk zLPXH3tO7Yy50Lo4cs+dntUrtuL84LYzogQb+iPClEy2e3Wpl8EX8A7FfrP6LP5etflg eitlz4KDcA0u2PjWaTB4VtF/+IePOCkIaSWhqNkuKA6Fb2PNBYaGIaSAgC6a77ZAKW5p apv/McZiDBWjEAFFaFPAY7BH8Gk7Wvf9OaCkyQzW2+P4pygl1T29TcF8YJ5lgW7/yEzc HIwRzUTGzMeH0jxl5MOyyQ2CH5/P2BjMrg6MKFM49GXXYYtlEalP03+r3KxHs+LIrX+x mnfQ== X-Forwarded-Encrypted: i=1; AKwUvBwyLUkwaXkiba9khTQuwX8s5/109bggxG5RvVTtcYyzUJVlDjhid7BsqrEQFoPc1K6WdPWrDo/qasUA@vger.kernel.org X-Gm-Message-State: AFuF++ltthRN9e6g0cxDE0TuiI25ZLavVdsBvcMzkzxU8bd8o0LiJo8R zTJO9tUhC0bo9uIERpqPj/7Cd17AmlRrBfnizkBTgsUQnXORXZEwqkcA X-Gm-Gg: AYBFou1BQARLtkoish77JLoqPG44DWU6Sc9R+p5vtQdysXzj2OfiojpMnYAirFRFQSb GN1pATqg7ENx2K6LdR/63eG9CFhaEDbu+yTap9bHebgwgyFcb76UxgC0uzxxhnZi+3KXqGAgCz7 ov2t/T8KENsLIoDMhcI5cmeRLS6AAQHalWK8qh8mHPJEaK/wXWt3zytlbeL5ysVvqKqCgf80j0Z PX6nScjqKCH6KPFrxNMItv+r02kmTnJx/WJTdKys66VZpOFgmy0b4VTuxjNpT99rk9Y7IpG1/UL XzhR1y+2+RhDQ2rI8IGroMWtnKmwe9UfOlHw7vzSVaeoAqVHv8rwrZjJmbXIwyDnHrl5T7FRYpi mUVis85NDSuhdx9rcRe0kjQetCUGJnk1wyX6WnYoZfjHOoajhKEwl45usQ/cZ+ZSzIokfEBGqiq l2hxUT5vxQ/75MQpq7zwm8b5K6Hq5UCDGHDYZwLCsueQxhpDAf8+ObzSBPFfAw4C7XhOEQgZ2lL JLT7P07OMMobfz+bBK/1I6ki1JwiXduT1PePge9 X-Received: by 2002:a17:907:97cd:b0:c29:f5d5:5a97 with SMTP id a640c23a62f3a-c2ac241b098mr961595666b.33.1790545423787; Sun, 27 Sep 2026 14:43:43 -0700 (PDT) Received: from buildhost.darklands.se ([2001:9b1:ff:d701:51eb:176f:63d9:53f8]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c2ae757b9c1sm376091866b.33.2026.09.27.14.43.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Sep 2026 14:43:43 -0700 (PDT) From: Magnus Lindholm To: davem@davemloft.net, andreas@gaisler.com Cc: sam@ravnborg.org, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linmag7@gmail.com Subject: [PATCH v4 0/6] sparc32: replace sp_banks with memblock Date: Sun, 27 Sep 2026 23:43:11 +0200 Message-ID: <20260927214334.886582-1-linmag7@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: sparclinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace the sparc32-private sp_banks memory description with memblock. The first two patches convert the SRMMU consumers that already run after bootmem_init() has populated memblock. The third patch moves memblock population to prom_meminit() and applies the mem= limit there. Patch 4 removes an unused address bitmap before patch 5 moves the early memory setup into setup_32.c. Patch 6 removes the now-unused sp_banks array. This work is based on an earlier eight-patch series by Sam Ravnborg. Patch 2 directly carries over Sam's memblock sizing conversion. The series has otherwise been substantially reorganized and reworked for the current kernel. It retains the sparc32 mem= command-line option by using memblock_enforce_memory_limit() and uses memblock's exclusive range-end semantics throughout. The series applies on top of the sparc32 phys_base and Viking fixes, rebased onto Linux 7.3-rc1. The prerequisite tip is recorded below as the base commit. setup_memory() preserves relocated-kernel handling by removing RAM below the physical address to which PAGE_OFFSET maps. Link: https://lore.kernel.org/sparclinux/20260816075141.3489194-1-linmag7@gmail.com/T/#t The v1 series was boot tested on a Sun SPARCstation 20 with dual SuperSPARC-II CPUs (SM71). The v2 series was boot tested on a Sun SPARCstation 20 with dual ROSS HyperSPARC (RT626) CPUs. The v3 series was cross-compiled with the SPARCstation 20 and LEON configurations as well as boot tested on a Sun SPARCstation 20 with dual ROSS HyperSPARC (RT626) CPUs. The v4 series was cross-compiled with the SPARCstation 20 SMP configuration and a sparc32_defconfig-derived LEON configuration, both with HIGHMEM enabled. Boot tested on a SPARCstation 20 SMP (ROSS) Changes in v4: - Use max_pfn in LEON's _pfn_valid() check, preserving the bounds of last_valid_pfn instead of restricting the check to lowmem, as requested by Andreas Larsson. - Correct the description: LEON systems can use highmem. - Carry Sam's Reviewed-by tag on patch 5; all six patches now retain his review tags. - Rebase onto Linux 7.3-rc1 plus the three prerequisite patches; adjust patch 6's context without changing its code changes. Changes in v3: - Add Sam's Reviewed-by tag to patch 4. - Initialize max_pfn in patch 5 and use it as the highmem zone limit. - Use PHYS_PFN() instead of open-coded PAGE_SHIFT conversions in patch 5. - Remove the obsolete highstart_pfn and highend_pfn declarations. - Use the generic PFN limit declarations from linux/memblock.h. - Document removal of the duplicate private HIGHMEM summary. Changes in v2: - Add Sam's Reviewed-by tags to patches 1-3 and 6. Patch 6 is the unchanged source change from patch 5 in v1, renumbered by the new patch. - Drop the unused sparc_valid_addr_bitmap in a preparation patch. - Use for_each_mem_pfn_range() and the standard max_low_pfn variable in the early memory setup. The change to LEON's PFN check made in v2 is corrected in v4 to preserve its original bounds. Suggested-by: Sam Ravnborg Link: https://lore.kernel.org/r/20260817153237.GA702187@ravnborg.org Link: https://lore.kernel.org/r/20260901214611.60560-1-linmag7@gmail.com Magnus Lindholm (6): sparc32: use memblock when mapping the kernel sparc32: use memblock to find available system memory sparc32: populate memblock from the PROM memory map sparc32: drop unused valid address bitmap sparc32: move early memory setup to setup_arch sparc32: drop sp_banks arch/sparc/include/asm/highmem.h | 3 - arch/sparc/include/asm/leon.h | 2 +- arch/sparc/include/asm/page_32.h | 16 --- arch/sparc/include/asm/pgtable_32.h | 3 +- arch/sparc/include/asm/pgtsrmmu.h | 1 - arch/sparc/kernel/setup_32.c | 112 ++++++++++--------- arch/sparc/mm/init_32.c | 167 +--------------------------- arch/sparc/mm/leon_mm.c | 1 + arch/sparc/mm/srmmu.c | 69 ++++-------- arch/sparc/prom/memory.c | 51 ++------- 10 files changed, 98 insertions(+), 327 deletions(-) base-commit: ff3cbaedcebcb60f8f13fa4dd667116f29cd53e4 -- 2.43.0