Re: [PATCH v3 3/3] s390x/tcg/tests: Tests for Miscellaneous-Instruction-Extensions Facility 3

[David Hildenbrand <david@redhat.com>]

On 16.02.22 10:28, Christian Borntraeger wrote:
> 
> 
> Am 16.02.22 um 10:17 schrieb David Hildenbrand:
>> On 15.02.22 21:27, David Miller wrote:
>>> tests/tcg/s390x/mie3-compl.c: [N]*K instructions
>>> tests/tcg/s390x/mie3-mvcrl.c: MVCRL instruction
>>> tests/tcg/s390x/mie3-sel.c:  SELECT instruction
>>>
>>> Signed-off-by: David Miller <dmiller423@gmail.com>
>>> ---
>>>    tests/tcg/s390x/Makefile.target |  2 +-
>>>    tests/tcg/s390x/mie3-compl.c    | 56 +++++++++++++++++++++++++++++++++
>>>    tests/tcg/s390x/mie3-mvcrl.c    | 31 ++++++++++++++++++
>>>    tests/tcg/s390x/mie3-sel.c      | 42 +++++++++++++++++++++++++
>>>    4 files changed, 130 insertions(+), 1 deletion(-)
>>>    create mode 100644 tests/tcg/s390x/mie3-compl.c
>>>    create mode 100644 tests/tcg/s390x/mie3-mvcrl.c
>>>    create mode 100644 tests/tcg/s390x/mie3-sel.c
>>>
>>> diff --git a/tests/tcg/s390x/Makefile.target
>>> b/tests/tcg/s390x/Makefile.target
>>> index 1a7238b4eb..16b9d45307 100644
>>> --- a/tests/tcg/s390x/Makefile.target
>>> +++ b/tests/tcg/s390x/Makefile.target
>>> @@ -1,6 +1,6 @@
>>>    S390X_SRC=$(SRC_PATH)/tests/tcg/s390x
>>>    VPATH+=$(S390X_SRC)
>>> -CFLAGS+=-march=zEC12 -m64
>>> +CFLAGS+=-march=z15 -m64
>>
>> Unfortunately, this makes our docker builds unhappy -- fail. I assume the
>> compiler in the container is outdated.
>>
>> $ make run-tcg-tests-s390x-linux-user
>> changing dir to build for make "run-tcg-tests-s390x-linux-user"...
>> make[1]: Entering directory '/home/dhildenb/git/qemu/build'
>>    GIT     ui/keycodemapdb tests/fp/berkeley-testfloat-3 tests/fp/berkeley-softfloat-3 dtc capstone slirp
>>    BUILD   debian10
>>    BUILD   debian-s390x-cross
>>    BUILD   TCG tests for s390x-linux-user
>>    CHECK   debian10
>>    CHECK   debian-s390x-cross
>>    BUILD   s390x-linux-user guest-tests with docker qemu/debian-s390x-cross
>> s390x-linux-gnu-gcc: error: unrecognized argument in option '-march=z15'
>> s390x-linux-gnu-gcc: note: valid arguments to '-march=' are: arch10 arch11 arch12 arch3 arch5 arch6 arch7 arch8 arch9 g5 g6 native z10 z13 z14 z196 z9-109 z9-ec z900 z990 zEC12; did you mean 'z10'?
>>
>> Maybe debian11 could, work.
>>
>> @Thomas do you have any idea if we could get this to work with
>> '-march=z15' or should we work around that by manually encoding
>> the relevant instructions instead?
> 
> Yes, the problem is that binutils reject new mnemomics for older -march settings.
> The Linux kernel handles this by using
> .insn instead of the mnemonic. This will also allow to compile the testcase with older compilers/binutils.
> 
> So something like
> "ncrk  0, 3, 2" -> ".insn rrf,0xb9f50000,0,3,2,0"
> 

I tried

diff --git a/tests/docker/dockerfiles/debian-s390x-cross.docker
b/tests/docker/dockerfiles/debian-s390x-cross.docker
index 9f2ab51eb0..10e70e0fe8 100644
--- a/tests/docker/dockerfiles/debian-s390x-cross.docker
+++ b/tests/docker/dockerfiles/debian-s390x-cross.docker
@@ -1,9 +1,9 @@
 #
 # Docker s390 cross-compiler target
 #
-# This docker target builds on the debian Stretch base image.
+# This docker target builds on the debian Bullseye base image.
 #
-FROM qemu/debian10
+FROM qemu/debian11

But some of the packages we need (including
gcc-multilib-s390x-linux-gnu) seem to be "held broken":

E: Unable to correct problems, you have held broken packages.

-- 
Thanks,

David / dhildenb