On Fri, Oct 31, 2008 at 02:49:30PM +0900, Yuji Shimada wrote: > I created this patch for xen's dom0 linux. It is useful when we assign > I/O device to HVM domain using pci passthrough, because page-aligned > memory resource is required for pci passthrough. But I heard it is > also useful for KVM. So I submit it to linux-pci ML. > > On many system, BIOS assigns memory resources to the device and > enables it. So my patch disables the device, and releases memory > resources. Then it assigns page-aligned memory resource to the device. > > To reassign page-aligned memory resources to device, please add boot > parameters of linux as follows. > > reassigndev=00:1d.7,01:00.0 > > reassigndev= Specifies device to reassign page-aligned > memory resources. PCI-PCI bridge can be > specified, if resource windows need to be > expanded. It seems unreasonably restrictive to have to specify this at boot time. We do have some infrastructure for resizing and moving resource windows. Perhaps you could investigate a method for reassigning resources at runtime? -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- 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
