diff options
| author | Alex Bennée <alex.bennee@linaro.org> | 2017-02-23 18:29:23 +0000 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2017-02-24 10:32:46 +0000 |
| commit | 062ba099e01ff1474be98c0a4f3da351efab5d9d (patch) | |
| tree | f68acd0039cb955d536aacff5c3b177fcb53cf09 /target/arm/psci.c | |
| parent | c3b9a07a33de8015726b397270485c3998e7f86a (diff) | |
target-arm/powerctl: defer cpu reset work to CPU context
When switching a new vCPU on we want to complete a bunch of the setup
work before we start scheduling the vCPU thread. To do this cleanly we
defer vCPU setup to async work which will run the vCPUs execution
context as the thread is woken up. The scheduling of the work will kick
the vCPU awake.
This avoids potential races in MTTCG system emulation.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/psci.c')
| -rw-r--r-- | target/arm/psci.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/target/arm/psci.c b/target/arm/psci.c index 64bf82eea1..ade9fe2ede 100644 --- a/target/arm/psci.c +++ b/target/arm/psci.c @@ -127,7 +127,9 @@ void arm_handle_psci_call(ARMCPU *cpu) break; } target_cpu = ARM_CPU(target_cpu_state); - ret = target_cpu->powered_off ? 1 : 0; + + g_assert(qemu_mutex_iothread_locked()); + ret = target_cpu->power_state; break; default: /* Everything above affinity level 0 is always on. */ |