On Mon, Nov 29, 2010 at 11:30:09AM -0700, Bjorn Helgaas wrote: > > The last 1M before 4G contains the processor restart vector and usually > the system ROM. We don't know the actual ROM size; I chose 1M because > that's how much Windows 7 appears to avoid. > > Without this check, we can allocate PCI space that will never work. On > Matthew's HP 2530p, we put the Intel GTT "Flush Page" at the very last > page, which causes a spontaneous power-off: > > pci_root PNP0A08:00: host bridge window [mem 0xfee01000-0xffffffff] > fffff000-ffffffff : Intel Flush Page (assigned by intel-gtt) > > Reference: https://bugzilla.kernel.org/show_bug.cgi?id=23542 > Reported-by: Matthew Garrett <mjg@xxxxxxxxxx> > Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx> Tested-by: Matthew Garrett <mjg@xxxxxxxxxx> -- Matthew Garrett | mjg59@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
