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MSR TS bits can be modified with non-privileged instruction such as
tbegin./tend. That means guest can change MSR value "silently" without
notifying host.
It is necessary to sync the TM bits to host so that host can calculate
shadow msr correctly.
Note, privileged mode in the guest will always fail transactions so we
only take care of problem state mode in the guest.
The logic is put into kvmppc_copy_from_svcpu() so that
kvmppc_handle_exit_pr() can use correct MSR TM bits even when preemption
occurs.
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>