https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222234

--- Comment #6 from Mark Millard <[email protected]> ---
Created attachment 186517
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=186517&action=edit
Example patch for sys/arm64/arm64/identcpu.c 's sev instruction use

Beyond the release_aps use of SEV during boot
I found a SEV use in identcpus.c . So this is
a possible patch for that (for the same issue
of SEV not being timed relative to memory
updates).

I do not claim either patch has the optimal
form of dsb ??? instruction, just one that
seems (more then?) sufficient.

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