pci: add qemu gpex host bridge support.microvm

Find PCIe root using ACPI DSDT table.
Setup PCI bars.
initialize PCI devices.

Working:
 - finds + drives xhci-pci / virtio-pci devices.

TODO / known issues:
 - ioport setup is broken.
 - bootorder needs fixing.
 - 64bit mmio window not supported.
 - irq routing not supported.
 - pci config access in real mode is broken (not using mmconfig).
   - this breaks pcibios support.
     - which in turn breaks vgabios.
   - fixable via temporary modeswitch to 32bit.
     - which of course adds overhead.

Also:
 - needed in the first place for microvm?

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

0 files changed, 0 insertions, 0 deletions