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author | Aurelien Jarno <aurelien@aurel32.net> | 2013-04-13 14:31:54 +0200 |
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committer | Aurelien Jarno <aurelien@aurel32.net> | 2013-04-13 14:31:54 +0200 |
commit | 75312e745ad1b672cbabdc3022f6e7c8eff69b00 (patch) | |
tree | 5f2c92a22dbe0d149065123ea0827f5cdb76f752 /cpu-exec.c | |
parent | d640045a3ede028293b83e57e9ae1ce4f81044b8 (diff) | |
parent | 0727b867542eea7fedfd2c53568e9782627fd3bd (diff) | |
download | hqemu-75312e745ad1b672cbabdc3022f6e7c8eff69b00.zip hqemu-75312e745ad1b672cbabdc3022f6e7c8eff69b00.tar.gz |
Merge branch 'mingw' of git://qemu.weilnetz.de/qemu
* 'mingw' of git://qemu.weilnetz.de/qemu:
qemu-timer: move timeBeginPeriod/timeEndPeriod to os-win32
Release SMP restriction on Windows
Ensure good ordering of memory instruction in cpu_exec
Check effective suspension of TCG thread
Diffstat (limited to 'cpu-exec.c')
-rw-r--r-- | cpu-exec.c | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -215,6 +215,14 @@ int cpu_exec(CPUArchState *env) cpu_single_env = env; + /* As long as cpu_single_env is null, up to the assignment just above, + * requests by other threads to exit the execution loop are expected to + * be issued using the exit_request global. We must make sure that our + * evaluation of the global value is performed past the cpu_single_env + * value transition point, which requires a memory barrier as well as + * an instruction scheduling constraint on modern architectures. */ + smp_mb(); + if (unlikely(exit_request)) { cpu->exit_request = 1; } |