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Re: [Xen-devel] [PATCH v4 8/9] xen/arm: Implement hypercall for dirty page tracing

On 10/07/2013 04:51 PM, Eugene Fedotov wrote:

> Let me explain. I think the difference between handle_page_fault and
> handle_mmio is that the ongoing memory operation (that trapped here)
> should be repeated after handle_page_fault (the page fault handler
> clears read-only bit), but should be stepped out after handle_mmio (to
> do this we call advance_pc to increase the pc register). So, advance_pc
> is intentionally missed.

Oh right, thanks for the explanation!

Julien Grall

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