On Fri, Sep 04, 2020 at 09:29:05AM +0200, Gerd Hoffmann wrote: > Hi, > > > Unless I'm mistaken, microvm doesn't even support PCI, does it? > > Correct, no pci support right now. > > We could probably wire up ecam (arm/virt style) for pcie support, once > the acpi support for mictovm finally landed (we need acpi for that > because otherwise the kernel wouldn't find the pcie bus). > > Question is whenever there is a good reason to do so. Why would someone > prefer microvm with pcie support over q35?
The usual reasons to use pcie apply to microvm just the same. E.g.: pass through of pcie devices? > > If all of the above is true, this can be handled by adding "pci=lastbus=0" > > as a guest kernel param to override its scanning of buses. And couldn't > > that be done by QEMU's microvm_fix_kernel_cmdline() to make it transparent > > to the end user? > > microvm_fix_kernel_cmdline() is a hack, not a solution. > > Beside that I doubt this has much of an effect on microvm because > it doesn't support pcie in the first place. > > take care, > Gerd
