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Re: [Qemu-devel] Question about softmmu

From: olivier cozette
Subject: Re: [Qemu-devel] Question about softmmu
Date: Sun, 7 Nov 2004 01:51:59 +0100
User-agent: Internet Messaging Program (IMP) 3.2.5


>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

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.


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