On 2013-02-19 16:54, Peter Maydell wrote: > On 19 February 2013 15:51, Jan Kiszka <jan.kis...@siemens.com> wrote: >> On 2013-02-19 16:20, Michael S. Tsirkin wrote: >>> qdev_init_nofail(dev); >>> d = SYS_BUS_DEVICE(dev); >>> - sysbus_mmio_map(d, 0, 0xfec00000); >>> + /* APIC overlaps the PCI window. */ >>> + sysbus_mmio_map_overlap(d, 0, 0xfec00000, 1000); >> >> That's the IOAPIC, not the APIC. If you mean the IOAPIC, APIC and HPET >> would require higher prio, too. But I suppose this is really about the >> APIC and its special priority due to CPU-local access dispatching, right? > > Is this a proposed minimally invasive patch for 1.4 with a > different approach (possibly involving reworking things with > a better managed set of container regions) for master, or > is this the planned fix for master too?
I'm not yet sure we need any overhaul at all. If hardware prioritizes certain windows like APIC, IOAPIC, HPET over PCI device mappings, then we can already express this today - we just need to do it. Jan -- Siemens AG, Corporate Technology, CT RTC ITP SDP-DE Corporate Competence Center Embedded Linux
