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AKwUvBxuR48ijGz45sXR12CzxAb6YTfrPp3mbDKG9v6+xromm1JBlXVRKMYJH+8XkhmbQpaaRWD7CfMko57OVrE=@vger.kernel.org X-Gm-Message-State: AFuF++mexsej99vEFZ8444sJ2/cfqYIl4rtfeZWn7y7xiZtfwCNOqqEZ fM+yX3QKxS8zt90LaM22GiC4KLjPllaY/poY45RZgP5S0TK1+LxhjW2vmy4MF1wqUYcFhlADATX cFrKpJA== X-Received: from pffl16-n2.prod.google.com ([2002:a05:6a00:c350:20b0:847:b24a:75d2]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:3a1c:b0:847:7f3c:b5f5 with SMTP id d2e1a72fcca58-86b30413312mr7137606b3a.11.1789144340903; Fri, 11 Sep 2026 09:32:20 -0700 (PDT) Date: Fri, 11 Sep 2026 09:32:20 -0700 In-Reply-To: <20260910115414.3015260-10-ewanhai-oc@zhaoxin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260910115414.3015260-1-ewanhai-oc@zhaoxin.com> <20260910115414.3015260-10-ewanhai-oc@zhaoxin.com> Message-ID: Subject: Re: [PATCH v2 9/9] KVM: selftests: vmx_apic_access_test: Check APIC virtualization support From: Sean Christopherson To: Ewan Hai-oc Cc: Paolo Bonzini , Shuah Khan , Frank Zhu , kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, ewanhai@zhaoxin.com, cobechen@zhaoxin.com Content-Type: text/plain; charset="us-ascii" On Thu, Sep 10, 2026, Ewan Hai-oc wrote: > diff --git a/tools/testing/selftests/kvm/lib/x86/vmx.c b/tools/testing/selftests/kvm/lib/x86/vmx.c > index 089e1a8af..e512191f1 100644 > --- a/tools/testing/selftests/kvm/lib/x86/vmx.c > +++ b/tools/testing/selftests/kvm/lib/x86/vmx.c > @@ -390,6 +390,21 @@ bool kvm_cpu_has_ept(void) > return ctrl & SECONDARY_EXEC_ENABLE_EPT; > } > > +bool kvm_cpu_has_vmx_apic_access_virt(void) This should be kvm_cpu_has_vmx_virtualize_apic_accesses() to match the macro, and to match what KVM itself uses. > +{ > + u64 ctrl; > + > + if (!kvm_cpu_has(X86_FEATURE_VMX)) > + return false; > + > + ctrl = kvm_get_feature_msr(MSR_IA32_VMX_TRUE_PROCBASED_CTLS) >> 32; > + if (!(ctrl & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)) > + return false; > + > + ctrl = kvm_get_feature_msr(MSR_IA32_VMX_PROCBASED_CTLS2) >> 32; > + return ctrl & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; Carve out the guts of kvm_cpu_has_ept() into a helper isntead of copy+pasting. > +} > + > void prepare_virtualize_apic_accesses(struct vmx_pages *vmx, struct kvm_vm *vm) > { > vmx->apic_access = (void *)vm_alloc_page(vm); > diff --git a/tools/testing/selftests/kvm/x86/vmx_apic_access_test.c b/tools/testing/selftests/kvm/x86/vmx_apic_access_test.c > index 463f73aa9..a1b6da4c0 100644 > --- a/tools/testing/selftests/kvm/x86/vmx_apic_access_test.c > +++ b/tools/testing/selftests/kvm/x86/vmx_apic_access_test.c > @@ -78,6 +78,7 @@ int main(int argc, char *argv[]) > struct kvm_vm *vm; > > TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX)); > + TEST_REQUIRE(kvm_cpu_has_vmx_apic_access_virt()); This can replace the X86_FEATURE_VMX check, since KVM shouldn't report support for virtualizing APIC accesses without VMX. No need for a new version, I'll fixup everything when applying.