[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Status of FLR in Xen 4.4
On 26/09/13 18:48, Ross Philipson wrote: > On 09/26/2013 12:20 PM, David Vrabel wrote: >> On 26/09/13 17:05, Matthias wrote: >>> Hi everyone, >>> >>> I would like to ask what the current status of FLR, or better of FLR >>> emulation is in latest Xen and if we can expect better support in the >>> future. >> >> What are these cards, are they multi-function and do they actually >> support FLR? Many graphics cards do not. >> >> I have the following hack to pciback to fallback to a bus reset for >> multi-function devices without FLR. Does it help for your use case? >> You will need to ensure that all functions are co-assigned to the same >> domain. > > New kernels (e.g. 3.8) have full support for PCI-e and PCI AF FLRs as > well as fallback support for D0-D3 and secondary bus resets. This > functionality is also in the some of the last 2.6 kernels like 2.6.39. > If you are using an older kernel I guess you might need to patch it. It will only do a secondary bus reset iff the function to be reset is the only function on that bus. If you have a multi-function device secondary bus reset is not tried. David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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