linux-kernel - Re: [PATCH v2 01/23] KVM: selftests: Minor improvements to asserts in test_vmx_nested

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Message-ID: <aR-m85ZKhRIPB14J@google.com>
Date: Thu, 20 Nov 2025 15:40:35 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Yosry Ahmed <yosry.ahmed@...ux.dev>
Cc: Paolo Bonzini <pbonzini@...hat.com>, Jim Mattson <jmattson@...gle.com>, kvm@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/23] KVM: selftests: Minor improvements to asserts in test_vmx_nested_state()

On Tue, Oct 21, 2025, Yosry Ahmed wrote:
> Display the address as hex if the asserts for the vmxon_pa and vmcs12_pa
> fail, and assert that the flags are 0 as expected.
> 
> Reviewed-by: Jim Mattson <jmattson@...gle.com>
> Signed-off-by: Yosry Ahmed <yosry.ahmed@...ux.dev>
> ---
>  .../selftests/kvm/x86/vmx_set_nested_state_test.c      | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/kvm/x86/vmx_set_nested_state_test.c b/tools/testing/selftests/kvm/x86/vmx_set_nested_state_test.c
> index 67a62a5a88951..c4c400d2824c1 100644
> --- a/tools/testing/selftests/kvm/x86/vmx_set_nested_state_test.c
> +++ b/tools/testing/selftests/kvm/x86/vmx_set_nested_state_test.c
> @@ -241,8 +241,14 @@ void test_vmx_nested_state(struct kvm_vcpu *vcpu)
>  	TEST_ASSERT(state->size >= sizeof(*state) && state->size <= state_sz,
>  		    "Size must be between %ld and %d.  The size returned was %d.",
>  		    sizeof(*state), state_sz, state->size);
> -	TEST_ASSERT(state->hdr.vmx.vmxon_pa == -1ull, "vmxon_pa must be -1ull.");
> -	TEST_ASSERT(state->hdr.vmx.vmcs12_pa == -1ull, "vmcs_pa must be -1ull.");
> +	TEST_ASSERT(state->hdr.vmx.vmxon_pa == -1ull,
> +		    "vmxon_pa must be 0x%llx, but was 0x%llx",
> +		    -1ull, state->hdr.vmx.vmxon_pa);
> +	TEST_ASSERT(state->hdr.vmx.vmcs12_pa == -1ull,
> +		    "vmcs12_pa must be 0x%llx, but was 0x%llx",
> +		    -1llu, state->hdr.vmx.vmcs12_pa);
> +	TEST_ASSERT(state->flags == 0,
> +		    "Flags must be equal to 0, but was 0x%hx", state->flags);

The error messages aren't adding a whole lot, why not just use TEST_ASSERT_EQ()?