Re: [PATCH 02/12] tests/qtest: Do not run lsi53c895a test if device is not present

[Fabiano Rosas <farosas@suse.de>]

Thomas Huth <thuth@redhat.com> writes:

> On 06/02/2023 16.04, Fabiano Rosas wrote:
>> The tests are built once for all the targets, so as long as one QEMU
>> binary is built with CONFIG_LSI_SCSI_PCI=y, this test will
>> run. However some binaries might not include the device. So check this
>> again in runtime.
>> 
>> Signed-off-by: Fabiano Rosas <farosas@suse.de>
>> ---
>>   tests/qtest/fuzz-lsi53c895a-test.c | 4 ++++
>>   1 file changed, 4 insertions(+)
>> 
>> diff --git a/tests/qtest/fuzz-lsi53c895a-test.c b/tests/qtest/fuzz-lsi53c895a-test.c
>> index 392a7ae7ed..a9254b455d 100644
>> --- a/tests/qtest/fuzz-lsi53c895a-test.c
>> +++ b/tests/qtest/fuzz-lsi53c895a-test.c
>> @@ -112,6 +112,10 @@ static void test_lsi_do_dma_empty_queue(void)
>>   
>>   int main(int argc, char **argv)
>>   {
>> +    if (!qtest_has_device("lsi53c895a")) {
>> +        return 0;
>> +    }
>
> I'm a little bit confused right now ... We're already checking 
> CONFIG_LSI_SCSI_PCI in meson.build, and we're only adding the test to 
> qtests_i386 there ... so how did you end up in a situation where you needed 
> this change?

I building with
--target-list=i386-softmmu,x86_64-softmmu,aarch64-softmmu,arm-softmmu
and the arm machines are selecting the CONFIG. That goes into
config_all_devices and meson can't tell the difference. In theory that
could be try for any CONFIG out there. Here's the output:

$ (...) qemu/build/tests/qtest/fuzz-lsi53c895a-test --tap -k
# random seed: R02Sfd8259d54ecdb6bdd8187b52e1a921c4
1..2
# Start of i386 tests
# Start of fuzz tests
# Start of lsi53c895a tests

# starting QEMU: exec ./qemu-system-i386 -qtest
  unix:/tmp/qtest-5629.sock -qtest-log /dev/null -chardev
  socket,path=/tmp/qtest-5629.qmp,id=char0 -mon
  chardev=char0,mode=control -display none -M q35 -nographic -monitor
  none -serial none -drive
  if=none,id=drive0,file=null-co://,file.read-zeroes=on,format=raw
  -device lsi53c895a,id=scsi0 -device
  scsi-hd,drive=drive0,bus=scsi0.0,channel=0,scsi-id=0,lun=0 -accel
  qtest

qemu-system-i386: -device lsi53c895a,id=scsi0: 'lsi53c895a' is not a valid device model name
Broken pipe
../tests/qtest/libqtest.c:181: kill_qemu() tried to terminate QEMU process but encountered exit status 1 (expected 0)
Aborted (core dumped)

$ find build -name "*.mak" -exec grep -H LSI_SCSI_PCI {} \;
./aarch64-softmmu-config-devices.mak:CONFIG_LSI_SCSI_PCI=y
./arm-softmmu-config-devices.mak:CONFIG_LSI_SCSI_PCI=y

hw/arm/Kconfig has:

config REALVIEW
    ...
    select LSI_SCSI_PCI

config VERSATILE
    ...
    select LSI_SCSI_PCI