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| author | Alex Bennée | 2017-02-23 19:29:12 +0100 |
|---|---|---|
| committer | Alex Bennée | 2017-02-24 11:32:45 +0100 |
| commit | e5143e30fb87fbf179029387f83f98a5a9b27f19 (patch) | |
| tree | b328a8046041f35bc3d03611f064d5e7098c2b7f /include/exec | |
| parent | tcg: drop global lock during TCG code execution (diff) | |
| download | qemu-e5143e30fb87fbf179029387f83f98a5a9b27f19.tar.gz qemu-e5143e30fb87fbf179029387f83f98a5a9b27f19.tar.xz qemu-e5143e30fb87fbf179029387f83f98a5a9b27f19.zip | |
tcg: remove global exit_request
There are now only two uses of the global exit_request left.
The first ensures we exit the run_loop when we first start to process
pending work and in the kick handler. This is just as easily done by
setting the first_cpu->exit_request flag.
The second use is in the round robin kick routine. The global
exit_request ensured every vCPU would set its local exit_request and
cause a full exit of the loop. Now the iothread isn't being held while
running we can just rely on the kick handler to push us out as intended.
We lightly re-factor the main vCPU thread to ensure cpu->exit_requests
cause us to exit the main loop and process any IO requests that might
come along. As an cpu->exit_request may legitimately get squashed
while processing the EXCP_INTERRUPT exception we also check
cpu->queued_work_first to ensure queued work is expedited as soon as
possible.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/exec-all.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 4e34fc4cc1..82f0e12327 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -404,7 +404,4 @@ bool memory_region_is_unassigned(MemoryRegion *mr); /* vl.c */ extern int singlestep; -/* cpu-exec.c, accessed with atomic_mb_read/atomic_mb_set */ -extern bool exit_request; - #endif |