* Paolo Bonzini (pbonz...@redhat.com) wrote: > > > On 17/06/2016 10:14, Chao Peng wrote: > > Basically: > > - it removes old ISA devices and support only PCI devices; > > I think you need to keep at least the RTC, otherwise where does Linux > get the time of day from? > > > - it removes 8259, instead use MSI as much as possible. IOAPIC and PCI > > PIN are still kept to support ACPI SCI; > > - it supports PCIE ( you can use MMFG instead of 0xcf8/0xcfc port > > access); > > - it gets rid of legacy firmware interfaces and supports ACPI tables; > > - it supports CPU/memory/PCI hotplug; > > - it supports Linux-guest only at present; > > - You may need carefully configure guest kernel; > > - You are forced to use virtio-serial-pci, old 8250/16550 is not there; > > It doesn't support PCIe hotplug though, I think? (Because it doesn't > support PCI bridges and PCIe hotplug doesn't work for root complex > devices). So is it ACPI-based hotplug? > > Lack of 8250/16550 means lack of earlyprintk. I know the driver is slow > though, so I understand that.
You could always define a different way to get early debug; for example a chunk of RAM at a known address seems fine for a VM. Dave -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
