diff options
| author | Sean Christopherson <seanjc@google.com> | 2026-08-13 15:36:08 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2026-09-26 02:22:15 -0400 |
| commit | 2f00ba93cc285092cd3b7ffebbc9abb6004f55e7 (patch) | |
| tree | 9b3363e3d1b92cf3236289cba54e4feab1630437 /tools | |
| parent | 0c19bc0ef11d8ea7f929a3ec3ce549cfe0781859 (diff) | |
KVM: selftests: Verify that L0's TPR doesn't get clobbered
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260813223610.2043560-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/kvm/x86/nested_x2apic_test.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86/nested_x2apic_test.c b/tools/testing/selftests/kvm/x86/nested_x2apic_test.c index a1072bf499ee..3b59ba3e3342 100644 --- a/tools/testing/selftests/kvm/x86/nested_x2apic_test.c +++ b/tools/testing/selftests/kvm/x86/nested_x2apic_test.c @@ -28,6 +28,10 @@ static void l2_guest_code(void) { if (inhibit_apicv) wrmsr(MSR_IA32_APICBASE, rdmsr(MSR_IA32_APICBASE) & GENMASK_ULL(11, 0)); + + x2apic_write_reg(APIC_TASKPRI, 0xf0); + GUEST_ASSERT_EQ(x2apic_read_reg(APIC_TASKPRI), 0xf0); + asm volatile("cpuid" ::: "eax", "ebx", "ecx", "edx"); } @@ -73,10 +77,22 @@ static void l1_guest_code(void *test_data) sti_nop(); + GUEST_ASSERT_EQ(x2apic_read_reg(APIC_TASKPRI), 0xf0); + x2apic_write_reg(APIC_ICR, APIC_DEST_SELF | APIC_INT_ASSERT | POSTED_INTR_VECTOR); + GUEST_ASSERT_EQ(nr_irqs, 0); + + x2apic_write_reg(APIC_TASKPRI, 0xff); + GUEST_ASSERT_EQ(x2apic_read_reg(APIC_TASKPRI), 0xff); x2apic_write_reg(APIC_ICR, APIC_DEST_SELF | APIC_INT_ASSERT | POSTED_INTR_WAKEUP_VECTOR); + GUEST_ASSERT_EQ(nr_irqs, 0); + + x2apic_write_reg(APIC_TASKPRI, 0); + GUEST_ASSERT_EQ(x2apic_read_reg(APIC_TASKPRI), 0); + x2apic_write_reg(APIC_ICR, APIC_DEST_SELF | APIC_INT_ASSERT | POSTED_INTR_NESTED_VECTOR); GUEST_ASSERT_EQ(nr_irqs, 3); + GUEST_DONE(); } |