This test checks that a nested VM-entry fails if the "use TPR shadow"
VM-execution control is set and the virtual-APIC address is illegal. A
legal virtual-apic address is 4k-aligned and within the physical
address space supported by the processor.
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
---
x86/vmx_tests.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index 22295e8..32aa35a 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -3438,6 +3438,20 @@ static void test_msr_bitmap(void)
"MSR bitmap", "Use MSR bitmaps");
}
+/*
+ * If the "use TPR shadow" VM-execution control is 1, the virtual-APIC
+ * address must satisfy the following checks:
+ * - Bits 11:0 of the address must be 0.
+ * - The address should not set any bits beyond the processor's
+ * physical-address width.
+ * [Intel SDM]
+ */
+static void test_apic_virt_addr(void)
+{
+ test_vmcs_page_reference(CPU_TPR_SHADOW, APIC_VIRT_ADDR,
+ "virtual-APIC address", "Use TPR shadow");
+}
+
static void vmx_controls_test(void)
{
/*
@@ -3453,6 +3467,7 @@ static void vmx_controls_test(void)
test_cr3_targets();
test_io_bitmaps();
test_msr_bitmap();
+ test_apic_virt_addr();
}
static bool valid_vmcs_for_vmentry(void)
--
2.14.1.342.g6490525c54-goog
