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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 239B9F8D763 for ; Thu, 16 Apr 2026 18:03:53 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4fxQpB0bDFz3cHS; Fri, 17 Apr 2026 04:02:26 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=172.234.252.31 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1776362546; cv=none; b=Bp8bS3H7U/qhdno231BwVocVsQbj1bkKb5y5Aw1afHLAfvi4iAedDKA+MdfPgVX7RmV7CrmfjpBrbc7+3wA67FrQxRVKnCIG0M2mA5JbB4FGN+JNuFwZA/gLYQhXhrIWBIGjpvUOxEjl1rd7WRX0WABStIxhYRTmknpnGT9mNF8Jbv4VO28nDm/5iarXz9DeGUQ/IQp1QCVhrm89MKYX0LFgA8J1Pe4MzghnRzefNVYcuuuis4XtGszAHId+GtdjxpAWaZlyfhpe3Ej00pUtHdTbabaRIIWBAorSlegM3nNYQzH9tNiORQulNmjuNkZDcf7Pmy4W90FO1kImaVv0Fw== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1776362546; c=relaxed/relaxed; bh=qSe2jMZYguaP33I5HEBEuUG0xfaEyFrbEUN9iiB96pc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=dbzS5jgdC1WK8TCo33asmmIDRKAWpmAdNydSi3EBgIAA2rzNCpUwU9zrG+mTfHC61f/hUPUbWNOuKEeSMf5yKh7MH8mjsPh2NN61/vr13KmZmg/0IYnNVaFhl8UTljTg5BmNhntvTRMwoH9CJtBsqS7RT8JHfp2kZgXE6gyGG3GjvFEuM5I8/+r1wdyMHVDChstKjU3VL5Bcbz6e8gbKVmsGNSJeVSJDha2flBvctlGWxydzufVMIux9PgTBkIHE51vFLT2cpy+Zky5rq7zZnNILuOjQG9FSpI58lbk9oG5/inCjSHTxxjtSphlogWfKmNm4ehst3rgnC5Vol0W5Yg== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=JZROWxYM; dkim-atps=neutral; spf=pass (client-ip=172.234.252.31; helo=sea.source.kernel.org; envelope-from=kwilczynski@kernel.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=JZROWxYM; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=172.234.252.31; helo=sea.source.kernel.org; envelope-from=kwilczynski@kernel.org; receiver=lists.ozlabs.org) Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4fxQp93hc1z2yYK for ; Fri, 17 Apr 2026 04:02:25 +1000 (AEST) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id E515640350; Thu, 16 Apr 2026 18:02:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5E97C2BCB4; Thu, 16 Apr 2026 18:02:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776362543; bh=3y3q4SKWG8uBCQVxES1VtyO8TFOC6cRnNz4hWDgP87I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JZROWxYMyZnpkJ0LQfB/oZHknpvcDP9f05j4Zye6NbiSSEieB0+XAtLHztwXaLNQP zUXBh6dafQRhY1r9+qHucHSisgWRn/svKtQzC6xjKzBb6Jsa2kAR1jl3w1z1f3iZ7Z Bk7P0gGLjPJOWm/yFifbnORGr0npbqP7+2sSSgUnOT4EEPKaMOa/7AynmfHVPxLPg5 1yrGSEq59p/RT7qDszGEmJEexbKvIRE6sFMZ4Bss8kyrphry6iaYnWRkdnqOEJxq7E i0ZEa4KlWRTFmL8jNDEMLXdwVB20c9lVSn55q2g5W7PFSYQ2RR2SY/m2omgxCctDqH Ru0xO0Y0zcMYQ== From: =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= To: Bjorn Helgaas Cc: Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Magnus Lindholm , Matt Turner , Richard Henderson , Christophe Leroy , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Dexuan Cui , =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= , Lukas Wunner , "Oliver O'Halloran" , Saurabh Singh Sengar , Shuan He , Srivatsa Bhat , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v5 20/23] alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range() Date: Thu, 16 Apr 2026 18:01:04 +0000 Message-ID: <20260416180107.777065-21-kwilczynski@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260416180107.777065-1-kwilczynski@kernel.org> References: <20260416180107.777065-1-kwilczynski@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently, pci_mmap_legacy_page_range() reads the legacy resource size from bus->legacy_mem->size or bus->legacy_io->size. This couples the mmap bounds check to the struct pci_bus fields that will be removed when legacy attributes are converted to static definitions. Compute the size directly using PCI_LEGACY_MEM_SIZE (0x100000) and PCI_LEGACY_IO_SIZE (0xffff) macros, and shift by 5 bits for sparse systems. Tested-by: Magnus Lindholm Acked-by: Magnus Lindholm Signed-off-by: Krzysztof Wilczyński --- arch/alpha/kernel/pci-sysfs.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c index 2e9693e5abe1..b986ff1e7a82 100644 --- a/arch/alpha/kernel/pci-sysfs.c +++ b/arch/alpha/kernel/pci-sysfs.c @@ -180,8 +180,11 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma, int sparse = has_sparse(hose, mmap_type); unsigned long res_size; - res_size = (mmap_type == pci_mmap_mem) ? bus->legacy_mem->size : - bus->legacy_io->size; + res_size = (mmap_type == pci_mmap_mem) ? PCI_LEGACY_MEM_SIZE : + PCI_LEGACY_IO_SIZE; + if (sparse) + res_size <<= 5; + if (!__legacy_mmap_fits(hose, vma, res_size, sparse)) return -EINVAL; -- 2.53.0