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=-7.7 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,URIBL_BLOCKED autolearn=no 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 69311C48BE0 for ; Thu, 10 Jun 2021 16:07:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4E1BD613E7 for ; Thu, 10 Jun 2021 16:07:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231200AbhFJQJk (ORCPT ); Thu, 10 Jun 2021 12:09:40 -0400 Received: from mail-io1-f53.google.com ([209.85.166.53]:38656 "EHLO mail-io1-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229823AbhFJQJj (ORCPT ); Thu, 10 Jun 2021 12:09:39 -0400 Received: by mail-io1-f53.google.com with SMTP id b25so27585628iot.5; Thu, 10 Jun 2021 09:07:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=kaZZOzSfE1U5InL076uxyCd5lJ1IWiQoV9yIjLnIADw=; b=qbAbRmanGuulXPWSE0XZvvrwSNUznnKaCIHS1SS8ovq2dtMtjFtSsRHZL20EeoS6Ds uR4gsgN0er8NXBRSx2QOhfaDkCoud5d0ktBOhYHvBt77KF3+J2KIX/e+TMcpJOZYUwiN MyT+C6ERLDQ/mF7l/jFboZXQg0MTNujEjAGa8iM51V8ih0rHp9bgQAWn2hXmbZLVFqen FxOn6xdei4ha/w4FObg80KnoQbPpk+qSE57I2Hi/m0cwmsSsxtAx8OPM4xYeh3blSJq5 TZaLjE98g4ToNJXdhi0Jpd+sSWPuXIlGqEJA7KCbjFKOxnLRYFa+CnZpHnEV8bmM0MvG z6hQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=kaZZOzSfE1U5InL076uxyCd5lJ1IWiQoV9yIjLnIADw=; b=H13Q4Rzm0WBbpabcpZLQT++9Ya4qIE5PlANOenFYPDM8dpWFe+FgLXWsLBa2zrInib ntOVVPWVA1GPTPwzg+iVtC++E1oz4ARen8wVUwvpC/AKLloQ5n5n2Q+HJlhxz0w4dMr8 gn8C/35t+Kh6iwlH9K7LkLnff74obipkGhj6SrbKjAePY/bORScm/OwTJSVZH4R5ZPjb 8SK6z6LhOs/3eXu1TZ93Ce3ee0w41efq95ECCVp+D1zJ3ej1yxnGq4aiaW/C9WYJVavz iN710rx+M53HsSYWltM92r7UMNpYPcpEWMt1UClxjUgxF4UXh3hOturmmTBk1ijlUWtm ku6g== X-Gm-Message-State: AOAM533dbV/CheazrnSMcDey1+HovAxmBtwGVIQdjgH3K/1j7JyQN4KQ xG13HmdcgQeR6kXMgoaiMaE= X-Google-Smtp-Source: ABdhPJxigYlkk+pjqfHrmEMr5uTSCmwPjamxfNT0l33BZoCn7VfgR6LOdlUu9NUC6+N8LT/CPnQYkg== X-Received: by 2002:a5e:8510:: with SMTP id i16mr4466522ioj.40.1623341189938; Thu, 10 Jun 2021 09:06:29 -0700 (PDT) Received: from auth1-smtp.messagingengine.com (auth1-smtp.messagingengine.com. [66.111.4.227]) by smtp.gmail.com with ESMTPSA id i6sm2205768ilq.57.2021.06.10.09.06.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Jun 2021 09:06:29 -0700 (PDT) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailauth.nyi.internal (Postfix) with ESMTP id 5D89127C0054; Thu, 10 Jun 2021 12:06:27 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Thu, 10 Jun 2021 12:06:28 -0400 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrfedufedgleehucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhepfffhvffukfhfgggtuggjsehttdertddttddvnecuhfhrohhmpeeuohhquhhn ucfhvghnghcuoegsohhquhhnrdhfvghnghesghhmrghilhdrtghomheqnecuggftrfgrth htvghrnhepvdejvdeutdfgfeffgeehkeevteffffekkefgffetieetteeghfefgfetteeg gfetnecuffhomhgrihhnpehkvghrnhgvlhdrohhrghdpihhnfhhrrgguvggrugdrohhrgh enucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpegsohhq uhhnodhmvghsmhhtphgruhhthhhpvghrshhonhgrlhhithihqdeiledvgeehtdeigedqud ejjeekheehhedvqdgsohhquhhnrdhfvghngheppehgmhgrihhlrdgtohhmsehfihigmhgv rdhnrghmvg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 10 Jun 2021 12:06:26 -0400 (EDT) Date: Fri, 11 Jun 2021 00:06:21 +0800 From: Boqun Feng To: Marc Zyngier Cc: Ard Biesheuvel , Arnd Bergmann , Bjorn Helgaas , Linux ARM , Linux Kernel Mailing List , linux-hyperv@vger.kernel.org, PCI , Catalin Marinas , Will Deacon , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Lorenzo Pieralisi , Rob Herring , Clint Sbisa , Sunil Muthuswamy Subject: Re: [RFC v3 0/7] PCI: hv: Support host bridge probing on ARM64 Message-ID: References: <20210609163211.3467449-1-boqun.feng@gmail.com> <2283b22ae7832db348bd9b3eff3aab16@misterjones.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2283b22ae7832db348bd9b3eff3aab16@misterjones.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 10, 2021 at 04:42:45PM +0100, Marc Zyngier wrote: > On 2021-06-10 16:01, Ard Biesheuvel wrote: > > On Wed, 9 Jun 2021 at 18:32, Boqun Feng wrote: > > > > > > Hi Bjorn, Arnd and Marc, > > > > > > > Instead of cc'ing Arnd, you cc'ed me (Ard) > > And I don't know if you intended to Cc me, but you definitely didn't. > Weird.. seems my sending script got somewhere wrong. Apologies for you both, and Arnd.. I did intend to Cc you and Arnd. How do you want this to proceed? I could do a resend right now, or I could wait for a few days (and see others' feedback) and send a V4 next week. Sorry again ;-( Regards, Boqun > Thanks, > > M. > > > > > > 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 > > > > > > > _______________________________________________ > > linux-arm-kernel mailing list > > linux-arm-kernel@lists.infradead.org > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > > -- > Who you jivin' with that Cosmik Debris? 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[66.111.4.227]) by smtp.gmail.com with ESMTPSA id i6sm2205768ilq.57.2021.06.10.09.06.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Jun 2021 09:06:29 -0700 (PDT) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailauth.nyi.internal (Postfix) with ESMTP id 5D89127C0054; Thu, 10 Jun 2021 12:06:27 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Thu, 10 Jun 2021 12:06:28 -0400 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrfedufedgleehucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhepfffhvffukfhfgggtuggjsehttdertddttddvnecuhfhrohhmpeeuohhquhhn ucfhvghnghcuoegsohhquhhnrdhfvghnghesghhmrghilhdrtghomheqnecuggftrfgrth htvghrnhepvdejvdeutdfgfeffgeehkeevteffffekkefgffetieetteeghfefgfetteeg gfetnecuffhomhgrihhnpehkvghrnhgvlhdrohhrghdpihhnfhhrrgguvggrugdrohhrgh enucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpegsohhq uhhnodhmvghsmhhtphgruhhthhhpvghrshhonhgrlhhithihqdeiledvgeehtdeigedqud ejjeekheehhedvqdgsohhquhhnrdhfvghngheppehgmhgrihhlrdgtohhmsehfihigmhgv rdhnrghmvg X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 10 Jun 2021 12:06:26 -0400 (EDT) Date: Fri, 11 Jun 2021 00:06:21 +0800 From: Boqun Feng To: Marc Zyngier Cc: Ard Biesheuvel , Arnd Bergmann , Bjorn Helgaas , Linux ARM , Linux Kernel Mailing List , linux-hyperv@vger.kernel.org, PCI , Catalin Marinas , Will Deacon , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Lorenzo Pieralisi , Rob Herring , Clint Sbisa , Sunil Muthuswamy Subject: Re: [RFC v3 0/7] PCI: hv: Support host bridge probing on ARM64 Message-ID: References: <20210609163211.3467449-1-boqun.feng@gmail.com> <2283b22ae7832db348bd9b3eff3aab16@misterjones.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <2283b22ae7832db348bd9b3eff3aab16@misterjones.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210610_090731_288457_F10EFC88 X-CRM114-Status: GOOD ( 33.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jun 10, 2021 at 04:42:45PM +0100, Marc Zyngier wrote: > On 2021-06-10 16:01, Ard Biesheuvel wrote: > > On Wed, 9 Jun 2021 at 18:32, Boqun Feng wrote: > > > > > > Hi Bjorn, Arnd and Marc, > > > > > > > Instead of cc'ing Arnd, you cc'ed me (Ard) > > And I don't know if you intended to Cc me, but you definitely didn't. > Weird.. seems my sending script got somewhere wrong. Apologies for you both, and Arnd.. I did intend to Cc you and Arnd. How do you want this to proceed? I could do a resend right now, or I could wait for a few days (and see others' feedback) and send a V4 next week. Sorry again ;-( Regards, Boqun > Thanks, > > M. > > > > > > 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 > > > > > > > _______________________________________________ > > linux-arm-kernel mailing list > > linux-arm-kernel@lists.infradead.org > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > > -- > Who you jivin' with that Cosmik Debris? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel