On Fri, 30 Jun 2017 10:25:05 +0300 Marcel Apfelbaum <mar...@redhat.com> wrote:
[...] > > So for the modern systems not supporting PCI ACPI hotplug > we don't need pci-bridges anyway, but for the older ones > the ACPI code of the pci-bridge will be loaded into the > ACPI namespace only if a pci-bridge is actually hot-plugged. just note that the set of 'older' guest OSes is limited to one that do not support SHPC (i.e. to EOLed WinXP & co) as for linux and more modern Windows SHPC hotplug should just work without our ACPI hack (which taxes low memory to keep acpi tables for bridges). So I'm in favor of Michael's suggestion to leave ACPI PCI only in PC machine for old WinXP guests and to keep Q35 clean, where linux or newer Windows guests could just use standard SHPC. [...]
