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target-arm: powerctl: Enable HVC when starting CPUs to EL2 

When QEMU provides the equivalent of the EL3 firmware, we
need to enable HVCs in scr_el3 when turning on CPUs that
target EL2.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20181011021931.4249-10-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Edgar E. Iglesias 2018-10-11 04:19:28 +02:00 committed by Peter Maydell
parent 357aa01335
commit 86278c33d1
1 changed files with 10 additions and 0 deletions
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10
target/arm/arm-powerctl.c
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@ -103,6 +103,16 @@ static void arm_set_cpu_on_async_work(CPUState *target_cpu_state,
} else {
/* Processor is not in secure mode */
target_cpu->env.cp15.scr_el3 |= SCR_NS;
/*
* If QEMU is providing the equivalent of EL3 firmware, then we need
* to make sure a CPU targeting EL2 comes out of reset with a
* functional HVC insn.
*/
if (arm_feature(&target_cpu->env, ARM_FEATURE_EL3)
&& info->target_el == 2) {
target_cpu->env.cp15.scr_el3 |= SCR_HCE;
}
}
/* We check if the started CPU is now at the correct level */