Kernel

This came up during the discussion on #13640, which specifically only adds single character/code point/code unit display for three common text encodings. A nice feature would be to decode and display the entire user selection as a string. Right now, the length of the user selection is not considered for value inspector data, just the starting position is used to read the next 8-bit number, 16-bit

Now that we have the checklocks analyzer, we should annotate values that are lock-protected with an appropriate checklocks attribute.

试了下qemu，文件系统有问题

• The set_mode_X() HIL functions need to support returning an error if hardware does not support that mode or if the implementation cannot put the hardware in to that mode at that time. See for an example where panic is used instead of returning an error https://github.com/tock/tock/pull/2629/files.

Describe the bug
the bzimage package can't unpack kernels compress with xz. This is because when I wrote it I was not sure how to find
the compressed part and used a simple minded search.

To Reproduce
create a bzImage but enable XZ compression in the kernel (yep, it's still called a bzimage)
use the kexec command with debug and note you see this:
2022/02/02 21:13:15 Failed to unpa