linux-kernel - Re: [PATCH v2 143/144] KVM: selftests: Add TEST_REQUIRE macros to reduce skipping copy+paste

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Date:   Fri, 10 Jun 2022 20:27:41 +0200
From:   Andrew Jones <drjones@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Oliver Upton <oupton@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 143/144] KVM: selftests: Add TEST_REQUIRE macros to
 reduce skipping copy+paste

On Fri, Jun 03, 2022 at 12:43:30AM +0000, Sean Christopherson wrote:
...
> diff --git a/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c b/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c
> index 1e366fdfe7be..d09b3cbcadc6 100644
> --- a/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c
> +++ b/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c
> @@ -25,10 +25,7 @@ int main(int argc, char *argv[])
>  	 * will cover the "regular" list of MSRs, the coverage here is purely
>  	 * opportunistic and not interesting on its own.
>  	 */
> -	if (!kvm_check_cap(KVM_CAP_GET_MSR_FEATURES)) {

I guess this one was missed on the initial conversion of kvm_check_cap to
kvm_has_cap, but it doesn't matter.

> -		print_skip("KVM_CAP_GET_MSR_FEATURES not supported");
> -		exit(KSFT_SKIP);
> -	}
> +	TEST_REQUIRE(kvm_has_cap(KVM_CAP_GET_MSR_FEATURES));
>  
>  	(void)kvm_get_msr_index_list();
>
...  
> @@ -70,17 +70,12 @@ int main(int argc, char *argv[])
>  {
>  	struct kvm_vcpu *vcpu;
>  	struct kvm_vm *vm;
> -	int rv;
>  	uint64_t msr_platform_info;
>  
>  	/* Tell stdout not to buffer its content */
>  	setbuf(stdout, NULL);
>  
> -	rv = kvm_check_cap(KVM_CAP_MSR_PLATFORM_INFO);

Also missed and also doesn't matter.

> -	if (!rv) {
> -		print_skip("KVM_CAP_MSR_PLATFORM_INFO not supported");
> -		exit(KSFT_SKIP);
> -	}
> +	TEST_REQUIRE(kvm_has_cap(KVM_CAP_MSR_PLATFORM_INFO));
>  
>  	vm = vm_create_with_one_vcpu(&vcpu, guest_code);
>  
> diff --git a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> index ffa6a2f93de2..de9ee00d84cf 100644
> --- a/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c
> @@ -417,39 +417,24 @@ static bool use_amd_pmu(void)
>  
>  int main(int argc, char *argv[])
>  {
> -	void (*guest_code)(void) = NULL;
> +	void (*guest_code)(void);
>  	struct kvm_vcpu *vcpu;
>  	struct kvm_vm *vm;
> -	int r;
>  
>  	/* Tell stdout not to buffer its content */
>  	setbuf(stdout, NULL);
>  
> -	r = kvm_check_cap(KVM_CAP_PMU_EVENT_FILTER);

Also missed and ...

> -	if (!r) {
> -		print_skip("KVM_CAP_PMU_EVENT_FILTER not supported");
> -		exit(KSFT_SKIP);
> -	}
> +	TEST_REQUIRE(kvm_check_cap(KVM_CAP_PMU_EVENT_FILTER));

... got carried into the TEST_REQUIRE, so it sort of matters.

Thanks,
drew