[Bug 247945] Kernel option KERN_TLS leads to an immediate panic while booting on ARM64 (RPi4)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247945

            Bug ID: 247945
           Summary: Kernel option KERN_TLS leads to an immediate panic
                    while booting on ARM64 (RPi4)
           Product: Base System
           Version: CURRENT
          Hardware: arm64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: gbe at FreeBSD.org

I have the following kernel configuration for amd64, which I try to use for
arm64 on a Raspberry Pi 4b. 

------------------------------------
include         GENERIC
options         RATELIMIT
options         TCPHPTS
options         KERN_TLS
------------------------------------

After some trail and error I nailed the panic down to the KERN_TLS option. I am
unable to get a crash dump, because my keyboard isn't working over USB, but I
have attached a screenshot of the kernel panic.

The message of the panic is "panic: Thread already setup for VFP".

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