diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2024-02-28 13:18:37 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-03-06 20:59:20 +0300 |
| commit | c2585047c8e185b070ad5c7bd887ef59cee3941f (patch) | |
| tree | e51636a923adc8efb93a2e1496c4307fe8d9f8e6 /tools/testing/selftests/kvm/x86_64/kvm_pv_test.c | |
| parent | 4736d85f0d18ad0469439a0ebc7ccb0cd94bd754 (diff) | |
| download | linux-c2585047c8e185b070ad5c7bd887ef59cee3941f.tar.xz | |
KVM: selftests: Check that PV_UNHALT is cleared when HLT exiting is disabled
KVM_FEATURE_PV_UNHALT is expected to get cleared from KVM PV feature CPUID
data when KVM_X86_DISABLE_EXITS_HLT is enabled. Add the corresponding test
to kvm_pv_test.
Note, the newly added code doesn't actually test KVM_FEATURE_PV_UNHALT and
KVM_X86_DISABLE_EXITS_HLT features.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20240228101837.93642-4-vkuznets@redhat.com
[sean: add and use vcpu_cpuid_has()]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/kvm_pv_test.c')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/kvm_pv_test.c | 39 |
1 files changed, 39 insertions, 0 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 9e2879af7c20..40cc59f4e650 100644 --- a/tools/testing/selftests/kvm/x86_64/kvm_pv_test.c +++ b/tools/testing/selftests/kvm/x86_64/kvm_pv_test.c @@ -133,6 +133,43 @@ static void enter_guest(struct kvm_vcpu *vcpu) } } +static void test_pv_unhalt(void) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + struct kvm_cpuid_entry2 *ent; + u32 kvm_sig_old; + + 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); + + TEST_ASSERT(vcpu_cpuid_has(vcpu, X86_FEATURE_KVM_PV_UNHALT), + "Enabling X86_FEATURE_KVM_PV_UNHALT had no effect"); + + /* Make sure KVM clears vcpu->arch.kvm_cpuid */ + ent = vcpu_get_cpuid_entry(vcpu, KVM_CPUID_SIGNATURE); + kvm_sig_old = ent->ebx; + ent->ebx = 0xdeadbeef; + vcpu_set_cpuid(vcpu); + + vm_enable_cap(vm, KVM_CAP_X86_DISABLE_EXITS, KVM_X86_DISABLE_EXITS_HLT); + ent = vcpu_get_cpuid_entry(vcpu, KVM_CPUID_SIGNATURE); + ent->ebx = kvm_sig_old; + vcpu_set_cpuid(vcpu); + + TEST_ASSERT(!vcpu_cpuid_has(vcpu, X86_FEATURE_KVM_PV_UNHALT), + "KVM_FEATURE_PV_UNHALT is set with KVM_CAP_X86_DISABLE_EXITS"); + + /* FIXME: actually test KVM_FEATURE_PV_UNHALT feature */ + + kvm_vm_free(vm); +} + int main(void) { struct kvm_vcpu *vcpu; @@ -151,4 +188,6 @@ int main(void) enter_guest(vcpu); kvm_vm_free(vm); + + test_pv_unhalt(); } |