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authorMax Filippov <jcmvbkbc@gmail.com>2019-04-18 16:37:00 -0700
committerMax Filippov <jcmvbkbc@gmail.com>2019-05-15 10:31:52 -0700
commitb345e140534ea17814b02bdf8798f18db6295304 (patch)
treef9320a22da357d31ad10e17a340300b02a389b98 /linux-headers/linux/psci.h
parent98736654f3dfbf984d9e26c9be0480b0560c1067 (diff)
downloadfocaccia-qemu-b345e140534ea17814b02bdf8798f18db6295304.tar.gz
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target/xtensa: implement exclusive access option
The Exclusive Instructions provide a general-purpose mechanism for
atomic updates of memory-based synchronization variables that can be
used for exclusion algorithms.

Use cmpxchg-based implementation that is sufficient for the typical use
of exclusive access in atomic operations.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
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