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Date: Sun, 15 May 2016 22:53:56 +0300
From: Max Filippov <jcmvbkbc@gmail.com>
Message-ID: <20160515195356.GB24189@octofox.metropolis>
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Subject: Re: [Qemu-devel] "tcg: Clean up direct block chaining safety
 checks" breaks target-xtensa mmu test
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To: Sergey Fedorov <serge.fdrv@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>, Alex =?iso-8859-1?Q?Benn=E9e?= <alex.bennee@linaro.org>, qemu-devel <qemu-devel@nongnu.org>

On Sun, May 15, 2016 at 10:38:46PM +0300, Sergey Fedorov wrote:
> On 15/05/16 21:58, Max Filippov wrote:
> > I've noticed that the commit 5b053a4a28278 (tcg: Clean up direct block
> > chaining safety checks) has broken tearget-xtensa test cross_page_tb
> > from the tests/tcg/xtensa/test_mmu.S. The test runs a TB that spans two
> > adjacent pages, then unmaps the second page and runs it again. It
> > expects an instruction fetch exception on the second run, but with the
> > said commit doesn't get it. Reverting that commit fixes the test.
> > Any suggestions?
> 
> That's too strange. How do I run the test?

I've minimized the test case, the source and the binary are available
here:
  http://jcmvbkbc.spb.ru/~jcmvbkbc/tmp/201605152245/

You can run it as
  qemu-system-xtensa -M sim -cpu dc232b -nographic -semihosting -kernel ./test_mmu.tst

-- 
Thanks.
-- Max