[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH V12 3/5] libxl: add pvusb API
On Thu, Jan 14, 2016 at 5:41 AM, Chun Yan Liu <cyliu@xxxxxxxx> wrote: >> > +static int sysfs_write_intf(libxl__gc *gc, const char *intf, const char >> *path) >> > +{ >> >> What is `intf' here ? Maybe `interface' ? But there is nothing usb >> specific about this function. Looking for similar code elsewhere this >> function seems very similar to libxl_pci.c:sysfs_write_bdf, but I >> won't ask you to try to refactor these two functions together. > > Yes, it means 'interface'. It is referring to old xend/xm naming. > For example, a USB device in Linux sysfs is 3-11, under it, there might be > 3-11:1.0 and 3-11:1.1 (these are two interfaces). To assign this USB device > to guest, both 3-11:1.0 and 3-11:1.1 should be unbind from original driver > and bind to usbback. Just to be clear, "intf" is the old xend/xm naming; but "interface" is part of the USB topology description. One USB device can have several interfaces, just like one PCI device can have several 'functions', so the comparison to sysfs_write_bdf() is apt. -George _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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