From: Bjorn Helgaas <helgaas@kernel.org>
To: Boqun Feng <boqun.feng@gmail.com>
Cc: "Bjorn Helgaas" <bhelgaas@google.com>,
"Arnd Bergmann" <arnd@arndb.de>, "Marc Zyngier" <maz@kernel.org>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>,
"K. Y. Srinivasan" <kys@microsoft.com>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
"Stephen Hemminger" <sthemmin@microsoft.com>,
"Wei Liu" <wei.liu@kernel.org>,
"Dexuan Cui" <decui@microsoft.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-pci@vger.kernel.org,
"Sunil Muthuswamy" <sunilmut@microsoft.com>,
"Mike Rapoport" <rppt@kernel.org>
Subject: Re: [PATCH v6 0/8] PCI: hv: Support host bridge probing on ARM64
Date: Mon, 2 Aug 2021 18:05:18 -0500 [thread overview]
Message-ID: <20210802230518.GA1473900@bjorn-Precision-5520> (raw)
In-Reply-To: <YQepiKkFoJHC0gsK@boqun-archlinux>
On Mon, Aug 02, 2021 at 04:15:04PM +0800, Boqun Feng wrote:
> On Tue, Jul 27, 2021 at 02:06:49AM +0800, Boqun Feng wrote:
> > Hi,
> >
> > This is the v6 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/
> > v3: https://lore.kernel.org/lkml/20210609163211.3467449-1-boqun.feng@gmail.com/
> > v4: https://lore.kernel.org/lkml/20210714102737.198432-1-boqun.feng@gmail.com/
> > v5: https://lore.kernel.org/lkml/20210720134429.511541-1-boqun.feng@gmail.com/
> >
> > Changes since last version:
> >
> > * Rebase to 5.14-rc3
> >
> > * Comment fixes as suggested by Bjorn.
> >
> > 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,
> > which introduces a special case when trying to find the ACPI device from
> > the sysdata (see patch #3).
> >
> > With this patchset, we could enable the virtual PCI on Hyper-V ARM64
> > guest with other code under development.
> >
> > Comments and suggestions are welcome.
>
> Ping ;-)
Lorenzo normally takes care of the native drivers (including Hyper-V),
so I don't want to get in his way. If he's too busy and doesn't get a
chance, poke me again after -rc6 or so and I'll pick it up.
> > Arnd Bergmann (1):
> > PCI: hv: Generify PCI probing
> >
> > Boqun Feng (7):
> > PCI: Introduce domain_nr in pci_host_bridge
> > PCI: Support populating MSI domains of root buses via bridges
> > arm64: PCI: Restructure pcibios_root_bridge_prepare()
> > arm64: PCI: Support root bridge preparation for Hyper-V
> > PCI: hv: Set ->domain_nr of pci_host_bridge at probing time
> > PCI: hv: Set up MSI domain at bridge probing time
> > PCI: hv: Turn on the host bridge probing on ARM64
> >
> > arch/arm64/kernel/pci.c | 29 +++++++---
> > drivers/pci/controller/pci-hyperv.c | 86 +++++++++++++++++------------
> > drivers/pci/probe.c | 12 +++-
> > include/linux/pci.h | 11 ++++
> > 4 files changed, 93 insertions(+), 45 deletions(-)
> >
> > --
> > 2.32.0
> >
next prev parent reply other threads:[~2021-08-02 23:05 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-26 18:06 [PATCH v6 0/8] PCI: hv: Support host bridge probing on ARM64 Boqun Feng
2021-07-26 18:06 ` [PATCH v6 1/8] PCI: Introduce domain_nr in pci_host_bridge Boqun Feng
2021-07-26 18:06 ` [PATCH v6 2/8] PCI: Support populating MSI domains of root buses via bridges Boqun Feng
2021-07-27 16:14 ` Bjorn Helgaas
2021-07-26 18:06 ` [PATCH v6 3/8] arm64: PCI: Restructure pcibios_root_bridge_prepare() Boqun Feng
2021-08-23 9:43 ` Catalin Marinas
2021-07-26 18:06 ` [PATCH v6 4/8] arm64: PCI: Support root bridge preparation for Hyper-V Boqun Feng
2021-08-19 16:13 ` Boqun Feng
2021-08-20 17:49 ` Catalin Marinas
2021-08-23 9:12 ` Lorenzo Pieralisi
2021-08-23 9:43 ` Catalin Marinas
2021-07-26 18:06 ` [PATCH v6 5/8] PCI: hv: Generify PCI probing Boqun Feng
2021-07-26 18:06 ` [PATCH v6 6/8] PCI: hv: Set ->domain_nr of pci_host_bridge at probing time Boqun Feng
2021-07-26 18:06 ` [PATCH v6 7/8] PCI: hv: Set up MSI domain at bridge " Boqun Feng
2021-07-26 18:06 ` [PATCH v6 8/8] PCI: hv: Turn on the host bridge probing on ARM64 Boqun Feng
2021-08-03 17:14 ` Lorenzo Pieralisi
2021-08-09 14:38 ` Boqun Feng
2021-08-09 15:53 ` Lorenzo Pieralisi
2021-08-19 12:19 ` Boqun Feng
2021-07-27 16:12 ` [PATCH v6 0/8] PCI: hv: Support " Bjorn Helgaas
2021-08-02 8:13 ` Boqun Feng
2021-08-02 8:15 ` Boqun Feng
2021-08-02 23:05 ` Bjorn Helgaas [this message]
2021-08-19 14:17 ` Lorenzo Pieralisi
2021-08-19 15:47 ` Boqun Feng
2021-08-23 10:10 ` Lorenzo Pieralisi
2021-08-23 12:49 ` Boqun Feng
2021-08-23 10:02 ` Lorenzo Pieralisi
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