MFC @ r259635

This brings in the "-w" option from bhyve to ignore unknown MSRs.
It will make debugging Linux guests a bit easier.

Suggested by: Willem Jan Withagen (wjw at digiware nl)

Merge head up to r262222 (last merge was incomplete).

MFH@260917.

MFH: Tracking commit (r260891)

Sponsored by: The FreeBSD Foundation

Fix a possible memory use after free and leak situation associated
with USB device detach when using character device handles. This also
includes LibUSB. It turns out that "usb_close()" cannot always

Fix a possible memory use after free and leak situation associated
with USB device detach when using character device handles. This also
includes LibUSB. It turns out that "usb_close()" cannot always get a
reference to clean up its USB transfers and such, if called during the
kernel USB device detach.

Analysis by: hselasky @
Reported by: Juergen Lock <nox@jelal.kn-bremen.de>
MFC after: 1 week

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Implement better error recovery for Transaction Translators, TTs,
found in High Speed USB HUBs which translate from High Speed USB into
FULL or LOW speed USB. In some rare cases SPLIT transactions mi

Implement better error recovery for Transaction Translators, TTs,
found in High Speed USB HUBs which translate from High Speed USB into
FULL or LOW speed USB. In some rare cases SPLIT transactions might get
lost, which might leave the TT in an unknown state. Whenever we detect
such an error try to issue either a clear TT buffer request, or if
that is not possible reset the whole TT.

MFC after: 1 week

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USB method structures for USB controllers and USB pipes should be
constant and does not need to be modified. This also saves a small
amount of RAM.

Merge from head

IFC @ r254014

IFC @253398

Merge fresh head.

Fix some statical clang analyzer warnings.

Fix compile warning.

- Add more defines to limit USB memory usage and number of allocations
in reduced memory systems.

- Split allocation and freeing of the configuration descriptor into a separate
function, so that the

- Add more defines to limit USB memory usage and number of allocations
in reduced memory systems.

- Split allocation and freeing of the configuration descriptor into a separate
function, so that the configuration descriptor can be made fixed size
to save memory allocations. This applies for both device and host mode.

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Add some defines to limit USB memory usage in reduced memory systems.

Allow the default USB template to be specified at compile time.

sync from head

Add missing ifdef's for reduced feature compilations.

MFC @248461

- Make quirk for reading device descriptor from broken USB devices.
Else they won't enumerate at all:
hw.usb.full_ddesc=1
- Reduce the USB descriptor read timeout from 1000ms to
500ms. Typical value

- Make quirk for reading device descriptor from broken USB devices.
Else they won't enumerate at all:
hw.usb.full_ddesc=1
- Reduce the USB descriptor read timeout from 1000ms to
500ms. Typical value for LOW speed devices is 50-100ms.
- Enumerate USB device a maximum of 3 times when a port
connection change event is detected, before giving up.

MFC after: 1 month

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IFC @247348.

Resolve a LOR after r246616. Protect control requests using the USB device
enumeration lock. Make sure all callers of usbd_enum_lock() check the return
value. Remove the control transfer specific loc

Resolve a LOR after r246616. Protect control requests using the USB device
enumeration lock. Make sure all callers of usbd_enum_lock() check the return
value. Remove the control transfer specific lock. Bump the FreeBSD version
number, hence external USB modules may need to be recompiled due to a USB
device structure change.

MFC after: 1 week

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- Move scratch data from the USB bus structure to the USB device structure
so that simultaneous access cannot happen. Protect scratch area using
the enumeration lock. Also reduce stack usage in usbd_

- Move scratch data from the USB bus structure to the USB device structure
so that simultaneous access cannot happen. Protect scratch area using
the enumeration lock. Also reduce stack usage in usbd_transfer_setup()
by moving some big stack members to the scratch area. This saves around
200 bytes of stack.
- Fix a whitespace.

MFC after: 1 week

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Sync with HEAD.

Add defines to more easily allow a single threaded version of the FreeBSD
USB stack. This is useful for non-kernel purposes, like the loader.