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Re: [Qemu-devel] [PATCH v6 19/19] tcg: enable MTTCG by default for ARM o

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH v6 19/19] tcg: enable MTTCG by default for ARM on x86 hosts
Date: Thu, 10 Nov 2016 19:00:39 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 
On 11/09/2016 03:57 PM, Alex Bennée wrote:

This enables the multi-threaded system emulation by default for ARMv7
and ARMv8 guests using the x86_64 TCG backend. This means:

  - The x86_64 TCG backend supports cmpxchg based atomic ops
  - The x86_64 TCG backend emits barriers for barrier ops
What tcg backend doesn't support what we need? For a weakly ordered target, any of our hosts should work. 


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