Re: [kvm-unit-tests PATCH v2 2/6] s390x: basic self test

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On 18.05.2017 13:34, David Hildenbrand wrote:
> Test if the general infrastructure is working. The test will fail until
> we have proper sclp console output.
> 
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
> ---
>  s390x/Makefile      |  2 ++
>  s390x/selftest.c    | 41 +++++++++++++++++++++++++++++++++++++++++
>  s390x/unittests.cfg |  5 +++++
>  3 files changed, 48 insertions(+)
>  create mode 100644 s390x/selftest.c
> 
> diff --git a/s390x/Makefile b/s390x/Makefile
> index 193c3a0..4c6f9b5 100644
> --- a/s390x/Makefile
> +++ b/s390x/Makefile
> @@ -1,3 +1,5 @@
> +tests = $(TEST_DIR)/selftest.elf
> +
>  all: test_cases
>  
>  test_cases: $(tests)
> diff --git a/s390x/selftest.c b/s390x/selftest.c
> new file mode 100644
> index 0000000..d6d4167
> --- /dev/null
> +++ b/s390x/selftest.c
> @@ -0,0 +1,41 @@
> +/*
> + * Copyright (c) 2017 Red Hat Inc
> + *
> + * Authors:
> + *  Thomas Huth <thuth@xxxxxxxxxx>
> + *  David Hildenbrand <david@xxxxxxxxxx>
> + *
> + * This code is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU Library General Public License version 2.
> + */
> +#include <libcflat.h>
> +#include <util.h>
> +
> +static void test_fp(void)
> +{
> +	double a = 3.0;
> +	double b = 2.0;
> +	double c;
> +
> +	asm volatile(
> +		"	ddb %1, %2\n"
> +		"	std %1, %0\n"
> +		: "=m" (c) : "f" (a), "m" (b) : );

You could omit the final ":" here.

> +
> +	report("3.0/2.0 == 1.5",	c == 1.5);

The indentation of the last parameter looks weird when only looking at
this function.

> +}
> +
> +int main(int argc, char**argv)
> +{
> +	report_prefix_push("selftest");
> +
> +	report("true",			true);
> +	report("argc == 3",		argc == 3);
> +	report("argv[0] == PROGNAME",	!strcmp(argv[0], "s390x/selftest.elf"));
> +	report("argv[1] == test",	!strcmp(argv[1], "test"));
> +	report("argv[2] == 123",	!strcmp(argv[2], "123"));

I think I'd also prefer if you could remove the indentation of the
second parameters here.
Also not sure whether we should really use the argv[1] and argv[2] test
here? ... that way, you hardly can run this test manually (without
unittests.cfg) ... I think it would be nicer if we'd had something like
in arm/selftest.c here one day ... but ok, for a start, it's likely ok.

> +	test_fp();
> +
> +	return report_summary();
> +}
> diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg
> index b1e0b1e..92e01ab 100644
> --- a/s390x/unittests.cfg
> +++ b/s390x/unittests.cfg
> @@ -17,3 +17,8 @@
>  #			 # to check separated by a space but each check
>  #			 # parameter needs to be of the form <path>=<value>
>  ##############################################################################
> +
> +[selftest-setup]
> +file = selftest.elf
> +groups = selftest
> +extra_params = -append 'test 123'
> 

 Thomas



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