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Re: [Qemu-devel] "tcg: Clean up direct block chaining safety checks" bre

From: Sergey Fedorov
Subject: Re: [Qemu-devel] "tcg: Clean up direct block chaining safety checks" breaks target-xtensa mmu test
Date: Sun, 15 May 2016 22:56:47 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2

On 15/05/16 22:53, Max Filippov wrote:
> 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

Thank you for this. I'll try it tomorrow and figure out what's going wrong.

Kind regards,

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