Re: [Qemu-devel] [PATCH] lm32: take BQL before writing IP/IM register

["Alex Bennée" <alex.bennee@linaro.org>]

Michael Walle <michael@walle.cc> writes:

> Writing to these registers may raise an interrupt request. Actually,
> this prevents the milkymist board from starting.
>
> Cc: qemu-stable@nongnu.org
> Signed-off-by: Michael Walle <michael@walle.cc>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  target/lm32/op_helper.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/target/lm32/op_helper.c b/target/lm32/op_helper.c
> index 30f670eee8..a766a1ece4 100644
> --- a/target/lm32/op_helper.c
> +++ b/target/lm32/op_helper.c
> @@ -102,12 +102,16 @@ void HELPER(wcsr_dc)(CPULM32State *env, uint32_t dc)
>
>  void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
>  {
> +    qemu_mutex_lock_iothread();
>      lm32_pic_set_im(env->pic_state, im);
> +    qemu_mutex_unlock_iothread();
>  }
>
>  void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
>  {
> +    qemu_mutex_lock_iothread();
>      lm32_pic_set_ip(env->pic_state, im);
> +    qemu_mutex_unlock_iothread();
>  }
>
>  void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)


--
Alex Bennée