• Mika Westerberg's avatar
    thunderbolt: Add support for native USB4 _OSC · c6da62a2
    Mika Westerberg authored
    ACPI 6.4 introduced a new _OSC capability used to negotiate whether the
    OS is supposed to use Software (native) or Firmware based Connection
    Manager. If the native support is granted then there are set of bits
    that enable/disable different tunnel types that the Software Connection
    Manager is allowed to tunnel.
    
    This adds support for this new USB4 _OSC accordingly. When PCIe
    tunneling is disabled then the driver switches security level to be
    "nopcie" following the security level 5 used in Firmware based
    Connection Manager.
    Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
    Acked-by: default avatarYehezkel Bernat <YehezkelShB@gmail.com>
    c6da62a2
usb4.c 43.6 KB