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Re: [Qemu-devel] [PATCH v6 11/19] cputlb: introduce tlb_flush_* async wo

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH v6 11/19] cputlb: introduce tlb_flush_* async work.
Date: Thu, 10 Nov 2016 18:40:19 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

On 11/10/2016 06:34 PM, Alex Bennée wrote:
So to properly support ARM TLB flush semantics I want to move some of
the looping in the helpers into cputlb.c so I'm thinking we'll have:


Sounds good, thanks.

In fact for ARM we'll be able to put off the reckoning until a DMB
instruction comes along and we can force synchronisation at that point
but I'm assuming there must be other architectures with stricter

Yes, I can think of at least one arch for which the cross-cpu flush must finish before the source cpu continues.


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