Verify that vmon fails with unaligned vmxon region or
any bits set beyong the physical address width. Also verify
failure with an invalid revision identifier.
Signed-off-by: Bandan Das <bsd@xxxxxxxxxx>
---
x86/vmx.c | 46 +++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 43 insertions(+), 3 deletions(-)
diff --git a/x86/vmx.c b/x86/vmx.c
index 1182eef..207eb81 100644
--- a/x86/vmx.c
+++ b/x86/vmx.c
@@ -37,7 +37,7 @@
#include "smp.h"
#include "io.h"
-u32 *vmxon_region;
+u64 *vmxon_region;
struct vmcs *vmcs_root;
u32 vpid_cnt;
void *guest_stack, *guest_syscall_stack;
@@ -598,13 +598,53 @@ static int test_vmx_feature_control(void)
static int test_vmxon(void)
{
- int ret;
+ int ret, ret1;
u64 rflags;
+ u64 *tmp_region = vmxon_region;
+ int width = cpuid(0x80000008).a & 0xff;
+
+ /* Unaligned page access */
+ vmxon_region = (u64 *)((intptr_t)vmxon_region + 1);
+ rflags = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
+ write_rflags(rflags);
+ ret1 = vmx_on();
+ report("test vmxon with unaligned vmxon region", ret1);
+ if (!ret1) {
+ ret = 1;
+ goto out;
+ }
+ /* gpa bits beyond physical address width are set*/
+ vmxon_region = (u64 *)((intptr_t)tmp_region | ((u64)1 << (width+1)));
+ rflags = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
+ write_rflags(rflags);
+ ret1 = vmx_on();
+ report("test vmxon with bits set beyond physical address width", ret1);
+ if (!ret1) {
+ ret = 1;
+ goto out;
+ }
+
+ /* invalid revision indentifier */
+ vmxon_region = tmp_region;
+ *vmxon_region = 0xba9da9;
+ rflags = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
+ write_rflags(rflags);
+ ret1 = vmx_on();
+ report("test vmxon with invalid revision identifier", ret1);
+ if (!ret1) {
+ ret = 1;
+ goto out;
+ }
+
+ /* and finally a valid region */
+ *vmxon_region = basic.revision;
rflags = read_rflags() | X86_EFLAGS_CF | X86_EFLAGS_ZF;
write_rflags(rflags);
ret = vmx_on();
- report("test vmxon", !ret);
+ report("test vmxon with valid vmxon region", !ret);
+
+out:
return ret;
}
--
1.8.3.1
--
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