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target-arm: Don't try to set ESR IL bit in arm_cpu_do_interrupt_aarch64()
Remove some incorrect code from arm_cpu_do_interrupt_aarch64() which attempts to set the IL bit in the syndrome register based on the value of env->thumb. This is wrong in several ways: * IL doesn't indicate Thumb-vs-ARM, it indicates instruction length (which may be 16 or 32 for Thumb and is always 32 for ARM) * not every syndrome format uses IL like this -- for some IL is always set, and for some it is always clear * the code is changing esr_el[new_el] even for interrupt entry, which is not supposed to modify ESR_ELx at all Delete the code, and instead rely on the syndrome value in env->exception.syndrome having already been set up with the correct value of IL. Backports commit 78f1edb19fe11fa0c5d0bf484db59a384f455d3c from qemu
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@ -5611,9 +5611,6 @@ static void arm_cpu_do_interrupt_aarch64_(CPUState *cs)
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env->elr_el[new_el] = env->pc;
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} else {
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env->banked_spsr[aarch64_banked_spsr_index(new_el)] = cpsr_read(env);
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if (!env->thumb) {
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env->cp15.esr_el[new_el] |= 1 << 25;
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}
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env->elr_el[new_el] = env->regs[15];
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aarch64_sync_32_to_64(env);
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