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@xxxxxxxxx/ > > v2: https://lore.kernel.org/lkml/20210503144635.2297386-1-boqun.feng@xxxxxxxxx/ > > v3: https://lore.kernel.org/lkml/20210609163211.3467449-1-boqun.feng@xxxxxxxxx/ > > v4: https://lore.kernel.org/lkml/20210714102737.198432-1-boqun.feng@xxxxxxxxx/ > > v5: https://lore.kernel.org/lkml/20210720134429.511541-1-boqun.feng@xxxxxxxxx/ > > > > 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 > >
