Messages in this thread | | | Date | Thu, 10 Jun 2021 16:42:45 +0100 | From | Marc Zyngier <> | Subject | Re: [RFC v3 0/7] PCI: hv: Support host bridge probing on ARM64 |
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On 2021-06-10 16:01, Ard Biesheuvel wrote: > On Wed, 9 Jun 2021 at 18:32, Boqun Feng <boqun.feng@gmail.com> 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.
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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