From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Sean Christopherson <seanjc@google.com>
Subject: [PATCH 09/11] KVM: selftests: Verify that L0's TPR doesn't get clobbered
Date: Sat, 26 Sep 2026 01:32:51 -0400 [thread overview]
Message-ID: <20260926053253.195597-10-pbonzini@redhat.com> (raw)
In-Reply-To: <20260926053253.195597-1-pbonzini@redhat.com>
From: Sean Christopherson <seanjc@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260813223610.2043560-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
.../selftests/kvm/x86/nested_x2apic_test.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
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();
}
--
2.52.0
next prev parent reply other threads:[~2026-09-26 5:33 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-26 5:32 [PATCH 00/11] KVM: fix issues with stale control fields Paolo Bonzini
2026-09-26 5:32 ` [PATCH 01/11] KVM: SVM: Preserve TLB control (i.e. pending TLB flush) on failed VMRUN Paolo Bonzini
2026-09-26 5:32 ` [PATCH 02/11] KVM: SVM: Update control fields on #VMEXIT if and only if VMRUN succeeded Paolo Bonzini
2026-09-26 5:32 ` [PATCH 03/11] KVM: SVM: Don't mark ASID fields as dirty when setting control.tlb_ctl Paolo Bonzini
2026-09-26 5:32 ` [PATCH 04/11] KVM: SVM: Sync guest's PERF_CNTR_GLOBAL_CTL from h/w only on successful VMRUN Paolo Bonzini
2026-09-26 5:32 ` [PATCH 05/11] KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted Paolo Bonzini
2026-09-26 5:32 ` [PATCH 06/11] KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified Paolo Bonzini
2026-09-26 5:32 ` [PATCH 07/11] KVM: selftests: Add x2APIC MSR test for inhibiting APICv while nested Paolo Bonzini
2026-09-26 5:32 ` [PATCH 08/11] KVM: selftests: Run the nested x2APIC with and without APICv being inhibited in L2 Paolo Bonzini
2026-09-26 5:32 ` Paolo Bonzini [this message]
2026-09-26 5:32 ` [PATCH 10/11] KVM: selftests: Extend nested x2APIC test to validate disabling x2APIC virt Paolo Bonzini
2026-09-26 5:32 ` [PATCH 11/11] KVM: selftests: Extend nested x2APIC test to validate using eVMCS for vmcs12 Paolo Bonzini
2026-09-26 6:11 ` [PATCH 00/11] KVM: fix issues with stale control fields Paolo Bonzini
2026-09-28 17:01 ` Sean Christopherson
2026-09-26 6:12 ` Paolo Bonzini
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