Re: [Qemu-devel] Question about softmmu

[olivier cozette]

Hello,

>I'm reading the QEMU code. I have a question haunting my mind for some time
>about tb flushing due to MMU change. Generally, whenever the page table has
>any change, we should flush the tb hash table. But I only see in the code that
>when CR3 is changed, the tb_flush is called. What if the CR3 does not change,
>but some level 2 page table in the memory change, should the tb also be
>flushed?


In this case, in the real processor (see Intel Manual), the processor TLBs (it's
like the Qemu tb) are not flushed, so Qemu act as a real processor.

Olivier