K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2022-09-18T06:28:45.023839Z
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svn:log
V 624
arm64: gic: disable the ITS if it's enabled prior to configuration

The ITS is defined to be disabled on a warm reset, but we may be coming
in via another kernel/hypervisor type setup where the ITS has been
previously configured then relinquished to the next kernel in the chain.

If it's enabled, the later configuration of GITS_BASER will almost
certainly fail -- clear it to prevent that.

Reviewed by:	andrew
Sponsored by:	Ampere Computing
Submitted by:	Klara, Inc.

(cherry picked from commit 1236b04bb7045e541b2343543e356273db20ee56)

Git Hash:   354d310fe9871df0cbc3edfd5c3ef61ad39acfbf
Git Author: kevans@FreeBSD.org
END