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| From: | Sergey Fedorov |
| Subject: | Re: [Qemu-devel] [RFC v2 PATCH 01/13] Introduce TCGOpcode for memory barrier |
| Date: | Thu, 2 Jun 2016 23:38:53 +0300 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 |
On 02/06/16 23:36, Richard Henderson wrote: > On 06/02/2016 09:30 AM, Sergey Fedorov wrote: >> I think we need to extend TCG load/store instruction attributes to >> provide information about guest ordering requirements and leave this TCG >> operation only for explicit barrier instruction translation. > > I do not agree. I think separate barriers are much cleaner and easier > to manage and reason with. > How are we going to emulate strongly-ordered guests on weakly-ordered hosts then? I think if every load/store operation must specify which ordering it implies then this task would be quite simple. Kind regards, Sergey
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