[Xen-devel] [XTF PATCH 08/16] vvmx: test vmxon with invalidly wide VMXON region address

[Haozhong Zhang <haozhong.zhang@xxxxxxxxx>]

VMfailInvalid is expected in this test.

Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
---
 tests/vvmx/vmxon.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/tests/vvmx/vmxon.c b/tests/vvmx/vmxon.c
index ca33b3c..8147679 100644
--- a/tests/vvmx/vmxon.c
+++ b/tests/vvmx/vmxon.c
@@ -53,6 +53,40 @@ static bool test_vmxon_in_user(void)
                               VMXERR_FAULT, EXINFO_SYM(GP, 0), 0);
 }
 
+static uint8_t get_cpu_paddr_bits(void)
+{
+    uint8_t paddr_bits = 36;
+    uint32_t eax;
+
+    eax = cpuid_eax(0x80000000);
+    if ( (eax >> 16) == 0x8000 && eax >= 0x80000008 )
+    {
+        eax = cpuid_eax(0x80000008);
+        paddr_bits = eax & 0xff;
+        if ( paddr_bits > 52 )
+            paddr_bits = 52;
+    }
+
+    return paddr_bits;
+}
+
+/**
+ * vmxon with VMXON region address that expires the maximum physical
+ * address width
+ *
+ * Expect: VMfailInvalid
+ */
+static bool test_vmxon_invalid_paddr_width(void)
+{
+    uint8_t paddr_bits = get_cpu_paddr_bits();
+    uint64_t invalid_vmxon_address = (1UL << paddr_bits);
+    exinfo_t fault;
+    uint8_t ret = vmxon(invalid_vmxon_address, &fault);
+
+    return handle_vmxinsn_err(__func__, ret, fault,
+                              VMXERR_VMFAIL_INVALID, 0, 0);
+}
+
 bool test_vmxon(void)
 {
     if ( !test_vmxon_novmxe() )
@@ -64,6 +98,9 @@ bool test_vmxon(void)
     if ( !test_vmxon_in_user() )
         return false;
 
+    if ( !test_vmxon_invalid_paddr_width() )
+        return false;
+
     return true;
 }
 
-- 
2.10.1


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