From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:58743)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <serge.fdrv@gmail.com>) id 1b5bo7-0007zo-F6
	for qemu-devel@nongnu.org; Wed, 25 May 2016 12:37:20 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <serge.fdrv@gmail.com>) id 1b5bo2-0002pY-EL
	for qemu-devel@nongnu.org; Wed, 25 May 2016 12:37:19 -0400
Received: from mail-lf0-x241.google.com ([2a00:1450:4010:c07::241]:35262)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <serge.fdrv@gmail.com>) id 1b5bo1-0002pR-O2
	for qemu-devel@nongnu.org; Wed, 25 May 2016 12:37:14 -0400
Received: by mail-lf0-x241.google.com with SMTP id p10so3736296lfb.2
	for <qemu-devel@nongnu.org>; Wed, 25 May 2016 09:37:13 -0700 (PDT)
References: <1463404380-29302-1-git-send-email-sergey.fedorov@linaro.org>
	<53a44acc-2a09-c321-a649-85e659bbc1e6@twiddle.net>
	<5739DAE2.3010802@gmail.com>
From: Sergey Fedorov <serge.fdrv@gmail.com>
Message-ID: <5745D4B7.40705@gmail.com>
Date: Wed, 25 May 2016 19:37:11 +0300
MIME-Version: 1.0
In-Reply-To: <5739DAE2.3010802@gmail.com>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] [PATCH] cpu-exec: Fix direct jump to TB spanning
 page
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel/>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
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 17:36, Sergey Fedorov wrote:
> 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.

Ping. This patch fixed a bug discussed in this thread:
http://thread.gmane.org/gmane.comp.emulators.qemu/411648

Kind regards,
Sergey