CVS commit: src/sys/dev/acpi

Module Name:	src
Committed By:	riastradh
Date:		Thu Jun 25 14:37:57 UTC 2026

Modified Files:
	src/sys/dev/acpi: acpi.c

Log Message:
acpi(4): Leave Hyper-V rndsource attached.

This way, it will be reported through rndctl(8) rather than only by
grepping through dmesg, and rndctl(8) can control it, e.g. if it
turns out something is wrong with that but not with RDSEED on the
same virtual CPU, you can use `rndctl -Ed "Hyper-V OEM0"' to discount
it and the system will gather fresh samples from RDSEED instead.

The same problem could in principle happen with other removable
rndsources like ualea(4), and we don't really have a good way to deal
with that -- either to configure the system up front to discount a
hot-pluggable rndsource that hasn't yet been plugged in, or to
retroactively discount a removable rndsource that was already
removed.  But this one isn't hot-pluggable or removable, so keeping
it around is enough to sidestep this problem.


To generate a diff of this commit:
cvs rdiff -u -r1.305 -r1.306 src/sys/dev/acpi/acpi.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.