Re: [Qemu-devel] [PATCH] target/aarch64: exit to main loop after handling MSR

[Richard Henderson]

On 06/13/2017 03:53 PM, Emilio G. Cota wrote:
> The appended fixes it for me. Can you please test?
> [ apply with `git am --scissors' ]
>
> Thanks,
>
>                 Emilio
>
> ---- 8< ----
>
> Commit e75449a3 ("target/aarch64: optimize indirect branches") causes
> a regression by which aarch64 guests freeze under TCG with -smp > 1,
> even with `-accel accel=tcg,thread=single' (i.e. MTTCG disabled).
>
> I isolated the problem to the MSR handler. This patch forces an exit
> after the handler is executed, which fixes the regression.

Why would that be?  The cpu_get_tb_cpu_state within helper_lookup_tb_ptr is 
supposed to read the new state that the msr handler would have installed.


r~