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 X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5CDE0C48BD1 for ; Wed, 9 Jun 2021 16:33:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3797E61376 for ; Wed, 9 Jun 2021 16:33:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235194AbhFIQf3 (ORCPT ); Wed, 9 Jun 2021 12:35:29 -0400 Received: from mail-il1-f176.google.com ([209.85.166.176]:36463 "EHLO mail-il1-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235342AbhFIQfX (ORCPT ); Wed, 9 Jun 2021 12:35:23 -0400 Received: by mail-il1-f176.google.com with SMTP id i13so21436755ilk.3; Wed, 09 Jun 2021 09:33:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=GtZXviG8uKoMfdBFxqtDjPPlrA8OzkIV4mPRyCmfPJ0=; b=YzkkczauS2WvRJIVgV/DNuSg7McxEpu8TA5olLmTNHDc5vb0b/VtwnwDhUFEB3gH78 XlfTwupw2p3xj+8LVdPmgEsyKLftx8Xu1s1anzpb+3mXJfMx+iFFhty9IyWM7i6ata1m dTQ+CRRGK68Qdw2v0wrgavXwnLxMhc6Ci26sUG73UMk32BNChJHmxRZHx0wqcTI+yfLx QUzqrgISJSKQnKKvIUAcnYDxbcJ+qXSJ8qGZ8OZ8jCxmytRPbS+cOiOr6u1iwXmgwLka 8zS/m4IuZtraftHXLX+Os3qA01m6T6rNdjn1fKUJ6iF+pxaTMeRjEheT4fIoeMyfxYZa P+MA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=GtZXviG8uKoMfdBFxqtDjPPlrA8OzkIV4mPRyCmfPJ0=; b=ljeWuqK9mWRd/GGb7TMUVao7bTE8SlaUAiOvpt6FqMcK5WVtdG0QmRQ2XtjAKbBR8Q udlnbZ+qVdWdWvi2pEEQvUOJ5cnAN1sJVAvNJ0ZDlV5B9X2+iDlE5iMkzLdl8DvFLLAp X+orOWQeQfrUAKgS35guRdtm7tSQXjlGH+5Cg10hXKvwiecxvJQ655wHBti0Y2odDiz0 1C1pDagcKzhxxgXTBXfQU9F50IwMu/DRSZSbnvpD8e1hwq29DNbrpLdXZqVu+eKYSKbi 4tyNqDIs8jmmRsHNQNOFJ6gAMcgPRK22bBFlkf7xhBm2zLWBlyHh5OKAm04oGSH8xdL8 VYtA== X-Gm-Message-State: AOAM5310FEQkGx08x1H3ZSTCTR5DFL8sW1+5Sc88DNyzcIWBSnv8hJaj ysSzIcoiWeTKgYLvPHamjEM= X-Google-Smtp-Source: ABdhPJyCaLxflqzQktggIYp8gGGDpxLAoGlXyBklc7M80uKlmRSeQ9JOVwhdJWE91P1RNtG49SHSnw== X-Received: by 2002:a05:6e02:13ec:: with SMTP id w12mr444534ilj.248.1623256338755; Wed, 09 Jun 2021 09:32:18 -0700 (PDT) Received: from auth2-smtp.messagingengine.com (auth2-smtp.messagingengine.com. [66.111.4.228]) by smtp.gmail.com with ESMTPSA id l12sm282835iln.20.2021.06.09.09.32.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Jun 2021 09:32:18 -0700 (PDT) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailauth.nyi.internal (Postfix) with ESMTP id 20A2E27C005B; Wed, 9 Jun 2021 12:32:16 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Wed, 09 Jun 2021 12:32:17 -0400 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrfeduuddguddtvdcutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enucfjughrpefhvffufffkofgggfestdekredtredttdenucfhrhhomhepuehoqhhunhcu hfgvnhhguceosghoqhhunhdrfhgvnhhgsehgmhgrihhlrdgtohhmqeenucggtffrrghtth gvrhhnpeeiueevjeelheduteefveeflefgjeetfeehvdekudekgfegudeghfduhfetveej udenucffohhmrghinhepkhgvrhhnvghlrdhorhhgnecuvehluhhsthgvrhfuihiivgeptd enucfrrghrrghmpehmrghilhhfrhhomhepsghoqhhunhdomhgvshhmthhprghuthhhphgv rhhsohhnrghlihhthidqieelvdeghedtieegqddujeejkeehheehvddqsghoqhhunhdrfh gvnhhgpeepghhmrghilhdrtghomhesfhhigihmvgdrnhgrmhgv X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 9 Jun 2021 12:32:15 -0400 (EDT) From: Boqun Feng To: Bjorn Helgaas , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org Cc: Catalin Marinas , Will Deacon , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Lorenzo Pieralisi , Rob Herring , Clint Sbisa , Boqun Feng , Ard Biesheuvel , Sunil Muthuswamy Subject: [RFC v3 0/7] PCI: hv: Support host bridge probing on ARM64 Date: Thu, 10 Jun 2021 00:32:04 +0800 Message-Id: <20210609163211.3467449-1-boqun.feng@gmail.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Hi Bjorn, Arnd and Marc, This is the v3 for the preparation of virtual PCI support on Hyper-V ARM64. Previous versions: v1: https://lore.kernel.org/lkml/20210319161956.2838291-1-boqun.feng@gmail.com/ v2: https://lore.kernel.org/lkml/20210503144635.2297386-1-boqun.feng@gmail.com/ Changes since last version: * Use a sentinel value approach instead of calling pci_bus_find_domain_nr() for every CONFIG_PCI_DOMAIN_GENERIC=y arch as per suggestion from * Improve the commit log and comments for patch #6. * Rebase to the latest mainline. The basic problem we need to resolve is that ARM64 is an arch with PCI_DOMAINS_GENERIC=y, so the bus sysdata is pci_config_window. However, Hyper-V PCI provides a paravirtualized PCI interface, so there is no actual pci_config_window for a PCI host bridge, so no information can be retrieve from the pci_config_window of a Hyper-V virtual PCI bus. Also there is no corresponding ACPI device for the Hyper-V PCI root bridge. With this patchset, we could enable the virtual PCI on Hyper-V ARM64 guest with other code under development. Comments and suggestions are welcome. Regards, Boqun Arnd Bergmann (1): PCI: hv: Generify PCI probing Boqun Feng (6): PCI: Introduce domain_nr in pci_host_bridge PCI: Allow msi domain set-up at host probing time PCI: hv: Use pci_host_bridge::domain_nr for PCI domain PCI: hv: Set up msi domain at bridge probing time arm64: PCI: Support root bridge preparation for Hyper-V PCI PCI: hv: Turn on the host bridge probing on ARM64 arch/arm64/kernel/pci.c | 7 ++- drivers/pci/controller/pci-hyperv.c | 87 +++++++++++++++++------------ drivers/pci/probe.c | 9 ++- include/linux/pci.h | 10 ++++ 4 files changed, 73 insertions(+), 40 deletions(-) -- 2.30.2