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 1DA43F36BA7 for ; Sat, 11 Apr 2026 08:04:40 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4ft5l30S2Nz2yr8; Sat, 11 Apr 2026 18:03:11 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2600:3c04:e001:324:0:1991:8:25" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1775894591; cv=none; b=Ogh3S4l/YtpJrH8m3MmBoCh/WQTNJUVuR3iZnD3W6w2CL7JrRmgPe2UI36dfYWHYnkNQLcpQ2xcgPSFY31D7XMK0lbcXhPu1Biv67Q230Ttk+wmRiOIFabwyjiGkwv/IotTZq/nOwqDnd7dTavOOzwgs68g0Rde2beUetouYe6e6aaL7FjXX8+Mbap8Iz0vT8TttR5QJSNo7rsQOI2c6w3i0s7JFZRGwhmJqMuIOLaHpxZiKV/AVnVqlJJa3qE8dhwmwh6XuHrVXfEDlITOw2lh5BRe2i9uFseyg8s+Lpr6Dlrcfag3t6kogpLw7o7uNzAlyo9iFSxqiYVp8y5KIEQ== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1775894591; c=relaxed/relaxed; bh=roku7nry9hr3kb8D2tlI5HZwGM5sF/zi2mzoneIm+D4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=FGvx6hSLwUb3Zr6k6zbNQLqhVSyAxdMt6gD9uuxSid3vU2mNe9wzTWNWfMOiAtbHRuS/GIj4+3ULNV29wtB44udmiqw3I74z4FTN/nakCVwDj5x2ubJqODWVg2xJHRn6XaJSOpwwTaw95NWb6vxoApaFY9S3Y38/DWQLmXlaFHYOe8mmvwKy7fjuYyWyS/CpCZziXhsjeNVChQ1N53FVXPV+ZBPxDyX+fDbFUY0cPsy4VcsICCkpaI/LNWVutV0m+lR32vTwaR3jyp+QwwVh+i8qnj304g+M2bKhLXJWPVIKJVerHDxG/ngc5Tq8Hwr1CQaWHMWQhust8Rrh4R5ErQ== 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=f8NEYhhq; dkim-atps=neutral; spf=pass (client-ip=2600:3c04:e001:324:0:1991:8:25; helo=tor.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=f8NEYhhq; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2600:3c04:e001:324:0:1991:8:25; helo=tor.source.kernel.org; envelope-from=kwilczynski@kernel.org; receiver=lists.ozlabs.org) Received: from tor.source.kernel.org (tor.source.kernel.org [IPv6:2600:3c04:e001:324:0:1991:8:25]) (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 4ft5l235pZz2yk6 for ; Sat, 11 Apr 2026 18:03:10 +1000 (AEST) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 3090160142; Sat, 11 Apr 2026 08:03:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4C61C19425; Sat, 11 Apr 2026 08:03:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775894587; bh=zSxumLDhzl/GXuL/vxCq5TbNSO065j7mWpkMfmgLc8Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f8NEYhhq6D8W6aFmYfs/BzPuBeHU9YkT8aICazqPgenLqFEffyJIXEsTcGBwRGffm ZOCGP1llYQkF7hIklBiiS9wz+9Wl4stAdeqDdQ1EPoRT2S8Z2quciSpc3VfYsu37Wa gSuR1wTJ1DmzMUPVTfR7MzVvhoxxHg+JG7zQxHoJBFfWhhDu4O44SzkUqHKyTFo00a AIaVxOLERCJcltbMq67MdL9AYOE8zLzR7EbujGs/KsYD4OmqCd/KNFq9D8xBerMF6H iRUqVmdN1Ic3XqqXtWQ8eymzyF0zG9saApjbGnAvhzqBJFmDy8U6Dh3Amkykvkb6Bs qVDfTdOLUlsSg== 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 v4 21/24] alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range() Date: Sat, 11 Apr 2026 08:01:45 +0000 Message-ID: <20260411080148.471335-22-kwilczynski@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260411080148.471335-1-kwilczynski@kernel.org> References: <20260411080148.471335-1-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. 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..a9dea147528d 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