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From: Sergey Fedorov <serge.fdrv@gmail.com>
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Date: Mon, 16 May 2016 17:36:18 +0300
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Subject: Re: [Qemu-devel] [PATCH] cpu-exec: Fix direct jump to TB spanning
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To: Richard Henderson <rth@twiddle.net>, Sergey Fedorov <sergey.fedorov@linaro.org>, qemu-devel@nongnu.org
Cc: =?UTF-8?Q?Alex_Benn=c3=a9e?= <alex.bennee@linaro.org>, Paolo Bonzini <pbonzini@redhat.com>, Peter Crosthwaite <crosthwaite.peter@gmail.com>

On 16/05/16 16:49, Richard Henderson wrote:
> On 05/16/2016 06:13 AM, Sergey Fedorov wrote:
>> It is not safe to make a direct jump to a TB spanning two pages in
>> system emulation because the mapping for the second page can get changed
>> but we don't take care of direct jumps in this case.
> We don't?  I'm pretty sure that we do...

What we just do is flushing the CPU virtual address cache, see for
tlb_flush() etc.

Kind regards,
Sergey