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target-arm: Change reset to highest available EL

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Update to arm_cpu_reset() to reset into the highest available exception level
based on the set ARM features.

Backports commit 5097227c15aa89baec1123aac25dd9500a62684d from qemu
This commit is contained in:
Greg Bellows 2018-02-12 10:33:00 -05:00 committed by Lioncash
parent 2cce33295b
commit cce21771b3
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 8 additions and 1 deletions
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9
qemu/target-arm/cpu.c
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@ -109,7 +109,14 @@ static void arm_cpu_reset(CPUState *s)
/* and to the FP/Neon instructions */
env->cp15.c1_coproc = deposit64(env->cp15.c1_coproc, 20, 2, 3);
#else
env->pstate = PSTATE_MODE_EL1h;
/* Reset into the highest available EL */
if (arm_feature(env, ARM_FEATURE_EL3)) {
env->pstate = PSTATE_MODE_EL3h;
} else if (arm_feature(env, ARM_FEATURE_EL2)) {
env->pstate = PSTATE_MODE_EL2h;
} else {
env->pstate = PSTATE_MODE_EL1h;
}
env->pc = cpu->rvbar;
#endif
} else {