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BTC_NO indicates that hardware is not succeptable to Branch Type Confusion.
Zen3 CPUs don't suffer BTC.
This is part of XSA-407.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
(cherry picked from commit 76cb04ad64)