// ucxroothub.h

typedef union _PARENT_HUB_FLAGS {
  ULONG  AsUlong32;
  struct {
    ULONG DisableLpmForAllDownstreamDevices : 1;
    ULONG HubIsHighSpeedCapable : 1;
    ULONG DisableUpdateMaxExitLatency : 1;
    ULONG DisableU1 : 1;
  } Flags;
  struct {
    ULONG DisableLpmForAllDownstreamDevices : 1;
    ULONG HubIsHighSpeedCapable : 1;
    ULONG DisableUpdateMaxExitLatency : 1;
    ULONG DisableU1 : 1;
  };
} PARENT_HUB_FLAGS, *PPARENT_HUB_FLAGS;
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Windows Driver Kit DDI reference (ns-ucxroothub-_parent_hub_flags)

_PARENT_HUB_FLAGS structure

Description

This structure is used by the HUB_INFO_FROM_PARENT structure to get hub information from the parent.

Members

`AsUlong32`

The size of structure represented as a LONG (32-bit) value.

`Flags`

`Flags.DisableLpmForAllDownstreamDevices`

Indicates that LPM should be disabled for all devices/hubs behind this hub.

`Flags.HubIsHighSpeedCapable`

Indicates that the hub is high-speed capable.

`Flags.DisableUpdateMaxExitLatency`

Indicates that UpdateMaxExitLatency should be disabled.

`Flags.DisableU1`

Indicates that U1 transitions should be disabled.

`DisableLpmForAllDownstreamDevices`