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| author | Alex Bennée | 2017-02-23 19:29:23 +0100 |
|---|---|---|
| committer | Alex Bennée | 2017-02-24 11:32:46 +0100 |
| commit | 062ba099e01ff1474be98c0a4f3da351efab5d9d (patch) | |
| tree | f68acd0039cb955d536aacff5c3b177fcb53cf09 /target/arm/cpu.h | |
| parent | cputlb: introduce tlb_flush_*_all_cpus[_synced] (diff) | |
| download | qemu-062ba099e01ff1474be98c0a4f3da351efab5d9d.tar.gz qemu-062ba099e01ff1474be98c0a4f3da351efab5d9d.tar.xz qemu-062ba099e01ff1474be98c0a4f3da351efab5d9d.zip | |
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/cpu.h')
| -rw-r--r-- | target/arm/cpu.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/target/arm/cpu.h b/target/arm/cpu.h index 0956a54e89..e285ba3b4b 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -526,6 +526,15 @@ typedef struct CPUARMState { */ typedef void ARMELChangeHook(ARMCPU *cpu, void *opaque); + +/* These values map onto the return values for + * QEMU_PSCI_0_2_FN_AFFINITY_INFO */ +typedef enum ARMPSCIState { + PSCI_OFF = 0, + PSCI_ON = 1, + PSCI_ON_PENDING = 2 +} ARMPSCIState; + /** * ARMCPU: * @env: #CPUARMState @@ -582,8 +591,10 @@ struct ARMCPU { /* Should CPU start in PSCI powered-off state? */ bool start_powered_off; - /* CPU currently in PSCI powered-off state */ - bool powered_off; + + /* Current power state, access guarded by BQL */ + ARMPSCIState power_state; + /* CPU has virtualization extension */ bool has_el2; /* CPU has security extension */ |