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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
cpu-exec.c
View file

@ -211,15 +211,21 @@ static void cpu_exec_nocache(CPUState *cpu, int max_cycles,
if (max_cycles > CF_COUNT_MASK)
max_cycles = CF_COUNT_MASK;
tb_lock();
tb = tb_gen_code(cpu, orig_tb->pc, orig_tb->cs_base, orig_tb->flags,
max_cycles | CF_NOCACHE
| (ignore_icount ? CF_IGNORE_ICOUNT : 0));
tb->orig_tb = orig_tb;
tb_unlock();
/* execute the generated code */
trace_exec_tb_nocache(tb, tb->pc);
cpu_tb_exec(cpu, tb);
tb_lock();
tb_phys_invalidate(tb, -1);
tb_free(tb);
tb_unlock();
}
#endif