When testing MMIO interface to APIC we need to make sure that APIC is in
xAPIC mode (and not x2APIC). KVM started enforcing this since commit
d1766202779e ("x86/kvm/lapic: always disable MMIO interface in x2APIC
mode").
While the 'clean' fix would be to separate L2's APIC from L1's and put
it to xAPIC mode or create a different MMIO mapping just for the test
we lack the required infrastructure in vmx library. As a quick band-aid
put L1's APIC to xAPIC mode for both EPT A/D enabled and disabled tests,
it seems we don't require x2APIC for anything.
Reported-by: kernel test robot <rong.a.chen@xxxxxxxxx>
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
x86/vmx_tests.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index b105b23..cc5192f 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -1094,6 +1094,8 @@ static int ept_init_common(bool have_ad)
install_ept(pml4, (unsigned long)data_page1, (unsigned long)data_page2,
EPT_RA | EPT_WA | EPT_EA);
+ reset_apic();
+
apic_version = apic_read(APIC_LVR);
ret = pci_find_dev(PCI_VENDOR_ID_REDHAT, PCI_DEVICE_ID_REDHAT_TEST);
--
2.17.1
