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From: David Hildenbrand <david@redhat.com>
To: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org,
	thuth@redhat.com, borntraeger@de.ibm.com, frankja@linux.ibm.com
Subject: Re: [kvm-unit-tests PATCH v7 4/4] s390x: SCLP unit test
Date: Mon, 13 Jan 2020 14:10:10 +0100
Message-ID: <22b5ce6a-18af-edec-efc6-e03450faddf8@redhat.com> (raw)
In-Reply-To: <20200113135832.1c6d3bb8@p-imbrenda>

On 13.01.20 13:58, Claudio Imbrenda wrote:
> On Mon, 13 Jan 2020 13:48:17 +0100
> David Hildenbrand <david@redhat.com> wrote:
> 
> [...]
> 	    
>>>>
>>>> I wonder if something like the following would be possible:
>>>>
>>>> expect_pgm_int();
>>>> ...
>>>> asm volatiole();
>>>> ...
>>>> sclp_wait_busy();
>>>> check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);  
>>>
>>> we do not expect a specification exception, if that happens it's
>>> a bug and the test should rightfully fail.  
>>
>> Which one do we expect? (you're not checking for a specific one,
>> should you?)
> 
> nothing, the call should succeed :)

:) I'm confused by the fact that you "expect_pgm_int()" but actually
don't expect one ...

Please enlighten me why this isn't

+	sclp_mark_busy();
+	h->length = 8;
+	sclp_setup_int();
+
+	asm volatile(
+		"       .insn   rre,0xb2204200,%1,%2\n"  /* servc %1,%2 */
+		"       ipm     %0\n"
+		"       srl     %0,28"
+		: "=&d" (cc) : "d" (valid_code), "a" (__pa(pagebuf))
+		: "cc", "memory");
+	if (!cc)
+		sclp_wait_busy();
+	report(cc == 0, "Instruction format ignored bits");

I feel like I am missing something important.

-- 
Thanks,

David / dhildenb


  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-10 18:40 [kvm-unit-tests PATCH v7 0/4] s390x: SCLP Unit test Claudio Imbrenda
2020-01-10 18:40 ` [kvm-unit-tests PATCH v7 1/4] s390x: export sclp_setup_int Claudio Imbrenda
2020-01-10 18:40 ` [kvm-unit-tests PATCH v7 2/4] s390x: sclp: add service call instruction wrapper Claudio Imbrenda
2020-01-10 18:40 ` [kvm-unit-tests PATCH v7 3/4] s390x: lib: add SPX and STPX " Claudio Imbrenda
2020-01-13  9:42   ` Janosch Frank
2020-01-13 12:27     ` Claudio Imbrenda
2020-01-13 10:42   ` David Hildenbrand
2020-01-10 18:40 ` [kvm-unit-tests PATCH v7 4/4] s390x: SCLP unit test Claudio Imbrenda
2020-01-13 11:00   ` David Hildenbrand
2020-01-13 12:33     ` Claudio Imbrenda
2020-01-13 12:48       ` David Hildenbrand
2020-01-13 12:58         ` Claudio Imbrenda
2020-01-13 13:10           ` David Hildenbrand [this message]
2020-01-13 14:05             ` Claudio Imbrenda
2020-01-13 14:43               ` David Hildenbrand
2020-01-13 15:24                 ` Claudio Imbrenda
2020-01-13 16:06                   ` David Hildenbrand
2020-01-13 16:17                     ` Claudio Imbrenda
2020-01-15  9:57                       ` David Hildenbrand

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