Re: [Xen-devel] No need to flush TLB in do_mmu_update ?

[Keir Fraser <keir.xen@xxxxxxxxx>]

It is up to the guest to request the TLB flushes that it needs. Xen performs the flushes it needs only for its own safety.


On 17/05/2013 00:57, "Xinxin Jin" <xinxinjin89@xxxxxxxxx> wrote:

Hi, I read the code of the hypercall handler do_mmu_update(), which updates guests' page table. I thought after update it should flush the old mapping from relative TLB entry. However I didn't find any TLB flush operations in this function. Could anyone explain what is the reason behind ? Thanks a lot !

Xinxin

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