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/kvm.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/kvm.c')
| -rw-r--r-- | target/arm/kvm.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/target/arm/kvm.c b/target/arm/kvm.c index c00b94e42a..395e986973 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -488,8 +488,8 @@ int kvm_arm_sync_mpstate_to_kvm(ARMCPU *cpu) { if (cap_has_mp_state) { struct kvm_mp_state mp_state = { - .mp_state = - cpu->powered_off ? KVM_MP_STATE_STOPPED : KVM_MP_STATE_RUNNABLE + .mp_state = (cpu->power_state == PSCI_OFF) ? + KVM_MP_STATE_STOPPED : KVM_MP_STATE_RUNNABLE }; int ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); if (ret) { @@ -515,7 +515,8 @@ int kvm_arm_sync_mpstate_to_qemu(ARMCPU *cpu) __func__, ret, strerror(-ret)); abort(); } - cpu->powered_off = (mp_state.mp_state == KVM_MP_STATE_STOPPED); + cpu->power_state = (mp_state.mp_state == KVM_MP_STATE_STOPPED) ? + PSCI_OFF : PSCI_ON; } return 0; |