[RFC v4 10/28] target-arm/arm-powerctl: wake up sleeping CPUs

["Alex Bennée" <alex.bennee@linaro.org>]

Testing with Alexander's bare metal syncronisation tests fails in MTTCG
leaving one CPU spinning forever waiting for the second CPU to wake up.
We simply need to kick the vCPU once we have processed the PSCI power on
call.

As the power control API is for system emulation only as is the
qemu_kick_cpu function we also ensure we only build arm-powerctl for
SoftMMU builds.

Tested-by: Alex Bennée <alex.bennee@linaro.org>
CC: Alexander Spyridakis <a.spyridakis@virtualopensystems.com>
Message-Id: <1439220437-23957-20-git-send-email-fred.konrad@greensocs.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

---
v3
  - re-base caught arm_powerctl re-factor
  - include cpu.h header for kick definition
  - fix Makefile.objs to only build for softmmu
---
 target-arm/Makefile.objs  | 2 +-
 target-arm/arm-powerctl.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/target-arm/Makefile.objs b/target-arm/Makefile.objs
index f206411..847fb52 100644
--- a/target-arm/Makefile.objs
+++ b/target-arm/Makefile.objs
@@ -9,4 +9,4 @@ obj-y += neon_helper.o iwmmxt_helper.o
 obj-y += gdbstub.o
 obj-$(TARGET_AARCH64) += cpu64.o translate-a64.o helper-a64.o gdbstub64.o
 obj-y += crypto_helper.o
-obj-y += arm-powerctl.o
+obj-$(CONFIG_SOFTMMU) += arm-powerctl.o
diff --git a/target-arm/arm-powerctl.c b/target-arm/arm-powerctl.c
index 6519d52..fbb7a15 100644
--- a/target-arm/arm-powerctl.c
+++ b/target-arm/arm-powerctl.c
@@ -166,6 +166,8 @@ int arm_set_cpu_on(uint64_t cpuid, uint64_t entry, uint64_t context_id,
     /* Start the new CPU at the requested address */
     cpu_set_pc(target_cpu_state, entry);
 
+    qemu_cpu_kick(target_cpu_state);
+
     /* We are good to go */
     return QEMU_ARM_POWERCTL_RET_SUCCESS;
 }
-- 
2.7.4