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author | Sergey Fedorov <serge.fdrv@gmail.com> | 2016-07-15 20:58:44 +0300 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-09-13 19:08:42 +0200 |
commit | 118b07308a8cedc16ef63d7ab243a95f1701db40 (patch) | |
tree | ac1e17b27cab6c16018a3409a81d8e31c0472c18 /Makefile.objs | |
parent | 89a16b1e4294e3664667a151c2f70c84dfac6fd9 (diff) |
tcg: Prepare safe access to tb_flushed out of tb_lock
Ensure atomicity and ordering of CPU's 'tb_flushed' access for future
translation block lookup out of 'tb_lock'.
This field can only be touched from another thread by tb_flush() in user
mode emulation. So the only access to be sequential atomic is:
* a single write in tb_flush();
* reads/writes out of 'tb_lock'.
In future, before enabling MTTCG in system mode, tb_flush() must be safe
and this field becomes unnecessary.
Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20160715175852.30749-5-sergey.fedorov@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Makefile.objs')
0 files changed, 0 insertions, 0 deletions