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KVM: selftests: Run the nested x2APIC with and without APICv being inhibited in L2

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Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260813223610.2043560-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2026-08-13 15:36:07 -07:00 committed by Paolo Bonzini
parent 8916c7a874
commit 0c19bc0ef1
1 changed files with 21 additions and 4 deletions
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25
tools/testing/selftests/kvm/x86/nested_x2apic_test.c
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@ -15,6 +15,7 @@
#define POSTED_INTR_WAKEUP_VECTOR 0xf1
#define POSTED_INTR_NESTED_VECTOR 0xf0
static bool inhibit_apicv;
static volatile unsigned int nr_irqs;
static void guest_irq_handler(struct ex_regs *regs)
@ -25,7 +26,8 @@ static void guest_irq_handler(struct ex_regs *regs)
static void l2_guest_code(void)
{
wrmsr(MSR_IA32_APICBASE, rdmsr(MSR_IA32_APICBASE) & GENMASK_ULL(11, 0));
if (inhibit_apicv)
wrmsr(MSR_IA32_APICBASE, rdmsr(MSR_IA32_APICBASE) & GENMASK_ULL(11, 0));
asm volatile("cpuid" ::: "eax", "ebx", "ecx", "edx");
}
@ -78,20 +80,20 @@ static void l1_guest_code(void *test_data)
GUEST_DONE();
}
int main(int argc, char *argv[])
static void __test_x2apic_intercepts(void)
{
gva_t nested_test_data_gva;
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
struct ucall uc;
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM) || kvm_cpu_has(X86_FEATURE_VMX));
vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
vm_install_exception_handler(vm, POSTED_INTR_VECTOR, guest_irq_handler);
vm_install_exception_handler(vm, POSTED_INTR_WAKEUP_VECTOR, guest_irq_handler);
vm_install_exception_handler(vm, POSTED_INTR_NESTED_VECTOR, guest_irq_handler);
sync_global_to_guest(vm, inhibit_apicv);
if (kvm_cpu_has(X86_FEATURE_SVM))
vcpu_alloc_svm(vm, &nested_test_data_gva);
else
@ -115,3 +117,18 @@ int main(int argc, char *argv[])
kvm_vm_free(vm);
}
#define test_x2apic_intercepts(inhibit_apic_setting) \
do { \
inhibit_apic_setting; \
\
__test_x2apic_intercepts(); \
} while (0)
int main(int argc, char *argv[])
{
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM) || kvm_cpu_has(X86_FEATURE_VMX));
test_x2apic_intercepts(inhibit_apicv = true);
test_x2apic_intercepts(inhibit_apicv = false);
}