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tcg: protect translation related stuff with tb_lock.

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This protects all translation related work with tb_lock() too ensure
thread safety. This effectively serialises all code generation. In
addition to the code generation we also take the lock for TB
invalidation. This has a knock on effect of meaning tb_lock() is held
for modification of the SoftMMU TLB by non-self threads which will be
used in later patches.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Message-Id: <1439220437-23957-8-git-send-email-fred.konrad@greensocs.com>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[AJB: moved into tree, clean-up history]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20161027151030.20863-10-alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
KONRAD Frederic 2016-10-27 16:10:06 +01:00 • committed by Paolo Bonzini
parent e505a063ba
commit a5e998262f
4 changed files with 44 additions and 6 deletions
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6
exec.c
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@ -2064,6 +2064,12 @@ static void check_watchpoint(int offset, int len, MemTxAttrs attrs, int flags)
continue;
}
cpu->watchpoint_hit = wp;
/* The tb_lock will be reset when cpu_loop_exit or
* cpu_loop_exit_noexc longjmp back into the cpu_exec
* main loop.
*/
tb_lock();
tb_check_watchpoint(cpu);
if (wp->flags & BP_STOP_BEFORE_ACCESS) {
cpu->exception_index = EXCP_DEBUG;