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Reply-To: Sean Christopherson <seanjc@google.com>
Date: Fri, 17 May 2024 10:38:50 -0700
In-Reply-To: <20240517173926.965351-1-seanjc@google.com>
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Message-ID: <20240517173926.965351-14-seanjc@google.com>
Subject: [PATCH v2 13/49] KVM: selftests: Fix a bad TEST_REQUIRE() in x86's
 KVM PV test
From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>, Sean Christopherson <seanjc@google.com>, 
	Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, 
	Hou Wenlong <houwenlong.hwl@antgroup.com>, Kechen Lu <kechenl@nvidia.com>, 
	Oliver Upton <oliver.upton@linux.dev>, Maxim Levitsky <mlevitsk@redhat.com>, 
	Binbin Wu <binbin.wu@linux.intel.com>, Yang Weijiang <weijiang.yang@intel.com>, 
	Robert Hoo <robert.hoo.linux@gmail.com>
Content-Type: text/plain; charset="UTF-8"

Actually check for KVM support for disabling HLT-exiting instead of
effectively checking that KVM_CAP_X86_DISABLE_EXITS is #defined to a
non-zero value, and convert the TEST_REQUIRE() to a simple return so
that only the sub-test is skipped if HLT-exiting is mandatory.

The goof has likely gone unnoticed because all x86 CPUs support disabling
HLT-exiting, only systems with the opt-in mitigate_smt_rsb KVM module
param disallow HLT-exiting.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 tools/testing/selftests/kvm/x86_64/kvm_pv_test.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/x86_64/kvm_pv_test.c b/tools/testing/selftests/kvm/x86_64/kvm_pv_test.c
index 78878b3a2725..2aee93108a54 100644
--- a/tools/testing/selftests/kvm/x86_64/kvm_pv_test.c
+++ b/tools/testing/selftests/kvm/x86_64/kvm_pv_test.c
@@ -140,10 +140,11 @@ static void test_pv_unhalt(void)
 	struct kvm_cpuid_entry2 *ent;
 	u32 kvm_sig_old;
 
+	if (!(kvm_check_cap(KVM_CAP_X86_DISABLE_EXITS) & KVM_X86_DISABLE_EXITS_HLT))
+		return;
+
 	pr_info("testing KVM_FEATURE_PV_UNHALT\n");
 
-	TEST_REQUIRE(KVM_CAP_X86_DISABLE_EXITS);
-
 	/* KVM_PV_UNHALT test */
 	vm = vm_create_with_one_vcpu(&vcpu, guest_main);
 	vcpu_set_cpuid_feature(vcpu, X86_FEATURE_KVM_PV_UNHALT);
-- 
2.45.0.215.g3402c0e53f-goog