linux-kernel - Re: [RFC v4 4/7] PCI: hv: Generify PCI probing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20210714194935.GA1870211@bjorn-Precision-5520>
Date:   Wed, 14 Jul 2021 14:49:35 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Boqun Feng <boqun.feng@...il.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>, Arnd Bergmann <arnd@...db.de>,
        Marc Zyngier <maz@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-pci@...r.kernel.org,
        Sunil Muthuswamy <sunilmut@...rosoft.com>,
        Mike Rapoport <rppt@...nel.org>
Subject: Re: [RFC v4 4/7] PCI: hv: Generify PCI probing

On Wed, Jul 14, 2021 at 06:27:34PM +0800, Boqun Feng wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> In order to support ARM64 Hyper-V PCI, we need to set up the bridge at
> probing time because ARM64 is a PCI_DOMAIN_GENERIC arch and we don't
> have pci_config_window (ARM64 sysdata) for a PCI root bus on Hyper-V, so
> it's impossible to retrieve the information (e.g. PCI domains, irq
> domains) from bus sysdata on ARM64 after creation.
> 
> Originally in create_root_hv_pci_bus(), pci_create_root_bus() is used to
> create the root bus and the corresponding bridge based on x86 sysdata.
> Now we create a bridge first and then call pci_scan_root_bus_bridge(),
> which allows us to do the necessary set-ups for the bridge.

Also here and other patches in this series:

  s/irq/IRQ/
  s/msi/MSI/

in subject lines, commit logs, comments.