[Qemu-devel] when to check external interrupt request ? or what is the timing to check and arise external interrupt ?

[Qemu-devel] when to check external interrupt request ? or what is the timing to check and arise external interrupt ?

[wang sheng]

I'm porting qemu to an new architecture. I come across some difficulty
that I can't define the timing that enable qemu's main-thread to be
interrupt and check external interrupt .

I understand the way that mips used to check external interrupt .

in qemu-system-mips ,   during do translation ,  if there is an
instruction that access CP0's Status register and Cause register,  the
"target-mips/translate.c" will add  a calling to function "
helper_interrupt_restart"  in the end of the translation_block.

But in my architecture which use "load/st" instruction to access  the
contr register in interrupt controller .  Because   I can't
distinguish the access for normal memory   and  access for  interrupt
controller's register ,  I  can't add  "interrupt_restart" function
calling in the end of translation block.

How can I do  to enable qemu have chance to check external interrupt ?

Re: [Qemu-devel] when to check external interrupt request ? or what is the timing to check and arise external interrupt ?

[Blue Swirl]

On Tue, Feb 22, 2011 at 6:47 AM, wang sheng <wansheg@gmail.com> wrote:
> I'm porting qemu to an new architecture. I come across some difficulty
> that I can't define the timing that enable qemu's main-thread to be
> interrupt and check external interrupt .
>
> I understand the way that mips used to check external interrupt .
>
> in qemu-system-mips ,   during do translation ,  if there is an
> instruction that access CP0's Status register and Cause register,  the
> "target-mips/translate.c" will add  a calling to function "
> helper_interrupt_restart"  in the end of the translation_block.
>
> But in my architecture which use "load/st" instruction to access  the
> contr register in interrupt controller .  Because   I can't
> distinguish the access for normal memory   and  access for  interrupt
> controller's register ,  I  can't add  "interrupt_restart" function
> calling in the end of translation block.
>
> How can I do  to enable qemu have chance to check external interrupt ?

Please try something similar to how cpu_request_exit function and
signal is used by hw/dma.c and hw/pc.c.