Re: [RFC PATCH 0/6] Port PPC64/PowerNV MMU tests to QEMU

[Fabiano Rosas]

Richard Henderson <richard.henderson@linaro.org> writes:

> On 3/24/22 13:08, Leandro Lupori wrote:
>> To be able to finish the test and return an exit code to the
>> calling process, the Processor Attention instruction is used.
>> As its behavior is implementation dependent, in QEMU PowerNV
>> it just calls exit with GPR[3] value, truncated to an uint8_t.
>
> I think you're simply thinking too small here, and should consider using the 
> attn 
> instruction to implement a full -semihosting interface.  You might as well 
> join arm and 
> riscv with CONFIG_ARM_COMPATIBLE_SEMIHOSTING.

I can't reach the semihosting docs at:
https://static.docs.arm.com/100863/0200/semihosting.pdf

Do we need to replace that URL with something else?

>
>
> r~