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| author | Alex Bennée <alex.bennee@linaro.org> | 2016-10-05 11:13:04 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-10-26 08:29:00 -0700 |
| commit | b67cb68ba59fd36076e5961139cb3c953c69bed0 (patch) | |
| tree | 503ffaa7f6d893be72ee7cdd74c08374f9a542f7 /linux-user | |
| parent | fdbc2b5722f6092e47181a947c90fd4bdcc1c121 (diff) | |
| download | qemu-b67cb68ba59fd36076e5961139cb3c953c69bed0.zip qemu-b67cb68ba59fd36076e5961139cb3c953c69bed0.tar.gz qemu-b67cb68ba59fd36076e5961139cb3c953c69bed0.tar.bz2 | |
linux-user: enable parallel code generation on clone
The variable parallel_cpus controls the generation of thread aware
atomic code. We only need to set it once we clone our first thread.
At this point any existing translations need to be thrown away.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/syscall.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index db697c0..7b77503 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6164,6 +6164,14 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp, sigfillset(&sigmask); sigprocmask(SIG_BLOCK, &sigmask, &info.sigmask); + /* If this is our first additional thread, we need to ensure we + * generate code for parallel execution and flush old translations. + */ + if (!parallel_cpus) { + parallel_cpus = true; + tb_flush(cpu); + } + ret = pthread_create(&info.thread, &attr, clone_func, &info); /* TODO: Free new CPU state if thread creation failed. */ |