> From: "Stephen Hemminger" <stephen at networkplumber.org> > Sent: Friday, May 10, 2013 12:29:29 PM > > On Fri, 10 May 2013 12:10:42 -0700 (PDT) > Bhavesh Davda <bhavesh at vmware.com> wrote: > > > Hi Stephen, > > > > I checked both our hypervisor code and with the experts who wrote and > > maintain the code, and we don't have any such limitation about not > > supporting SR-IOV if the motherboard or device doesn't support PCIe ASPM. > > > > If you can point me to the Intel person(s) who gave you that information > > (offline, no need to make this public :)), we can make sure such FUD > > doesn't continue getting spread too far. > > > > Thanks for making us aware of this FUD though. > > > > -- > > Bhavesh Davda > > > > According to Intel the problem was that the BIOS did not support _OSC table. > SR-IOV needs VT-d enabled and BIOS with _OSC and DMA ACPI tables. > The _OSC table is an ACPI control method that the kernel uses to interact > with PCIe Active Statep Power Management. Linux just assume no ASPM if table > is missing, VMWare ESX 5.1 seems to need it >
Once again, both in looking at our ACPI _OSC code in the hypervisor and in consulting with the experts, there is no such limitation for SR-IOV support in ESXi. Regards - Bhavesh
