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The EHCI licensing model was continued for Intel's xHCI specification, however with a greatly expanded industry contribution. Over 100 companies have contributed to the xHCI specification. The [[USB Implementers Forum]] (USB-IF) has also funded a set of xHCI Compliance Tests to maximize the compatibility of the various xHCI implementations.
xHCI 1.0 controllers have been shipping since December 2009. Linux kernels since 2009 contain xHCI drivers<ref>{{cite web|url=https://hvera.wordpress.com/2009/06/10/usb-3-0-in-linux-kernel/|title=USB 3.0 in Linux kernel|website=hvera.wordpress.com |date= |accessdate=2017-02-02}}</ref>, but for older kernels there are drivers available online. Windows drivers for XP, Vista, and Windows 7 are available from the respective xHCI vendors. xHCI drivers for embedded system are available from [[MCCI]], [[Jungo]], and other software vendors. xHCI IP blocks are also available from several vendors for customization in SOC environments. xHCI 1.1 controllers and devices began shipping in 2015.
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