Re: [kvm-unit-tests 2/2] s390x: skey: Fence TCG protection checks

[Claudio Imbrenda <imbrenda@linux.ibm.com>]

On Tue,  4 Aug 2026 14:16:29 +0000
Janosch Frank <frankja@linux.ibm.com> wrote:

> TCG does not implement the skey memory protection, skip those tests
> under TCG instead of filtering them in the CI logs.
> 
> This way the test will PASS when run by humans and there's no
> confusion why it fails anymore.
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

> ---
>  s390x/skey.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/s390x/skey.c b/s390x/skey.c
> index bb769730..1fc95857 100644
> --- a/s390x/skey.c
> +++ b/s390x/skey.c
> @@ -14,6 +14,7 @@
>  #include <vmalloc.h>
>  #include <css.h>
>  #include <mmu.h>
> +#include <hardware.h>
>  #include <asm/page.h>
>  #include <asm/facility.h>
>  #include <asm/mem.h>
> @@ -736,6 +737,13 @@ int main(void)
>  	test_set();
>  	test_set_mb();
>  	test_chg();
> +
> +	if  (detect_host() == HOST_IS_TCG) {
> +		report_skip("No actual access protection in TCG for skeys.");
> +		report_prefix_pop();
> +		return report_summary();
> +	}
> +
>  	test_test_protection();
>  	test_store_cpu_address();
>  	test_diag_308();