[Test code] Fix THC tolerance tests

In these tests, the tolerance constants all originally rounded to 0,
which meant they weren't testing the correct behavior (everything was
always under the tolerance level). This fixes the tests to properly put
everything over the tolerance threshold.

Signed-off-by: Jonathan Browne <[email protected]>

Author: JBYoshi

src/vmm/src/vstate/vcpu/x86_64.rs

@@ -902,8 +902,10 @@ mod tests {
         {
             // The frequency difference is within tolerance.
             let mut state = orig_state.clone();
-            state.tsc_khz =
-                Some(state.tsc_khz.unwrap() + TSC_KHZ_TOL_NUMERATOR / TSC_KHZ_TOL_DENOMINATOR / 2);
+            state.tsc_khz = Some(
+                state.tsc_khz.unwrap()
+                    + state.tsc_khz.unwrap() * TSC_KHZ_TOL_NUMERATOR / TSC_KHZ_TOL_DENOMINATOR / 2,
+            );
             assert!(!vcpu
                 .is_tsc_scaling_required(state.tsc_khz.unwrap())
                 .unwrap());
@@ -912,9 +914,11 @@ mod tests {
         {
             // The frequency difference is over the tolerance.
             let mut state = orig_state;
-            state.tsc_khz =
-                Some(state.tsc_khz.unwrap() + TSC_KHZ_TOL_NUMERATOR / TSC_KHZ_TOL_DENOMINATOR * 2);
-            assert!(!vcpu
+            state.tsc_khz = Some(
+                state.tsc_khz.unwrap()
+                    + state.tsc_khz.unwrap() * TSC_KHZ_TOL_NUMERATOR / TSC_KHZ_TOL_DENOMINATOR * 2,
+            );
+            assert!(vcpu
                 .is_tsc_scaling_required(state.tsc_khz.unwrap())
                 .unwrap());
         }
@@ -924,8 +928,10 @@ mod tests {
     fn test_set_tsc() {
         let (vm, vcpu, _) = setup_vcpu(0x1000);
         let mut state = vcpu.save_state().unwrap();
-        state.tsc_khz =
-            Some(state.tsc_khz.unwrap() + TSC_KHZ_TOL_NUMERATOR / TSC_KHZ_TOL_DENOMINATOR * 2);
+        state.tsc_khz = Some(
+            state.tsc_khz.unwrap()
+                + state.tsc_khz.unwrap() * TSC_KHZ_TOL_NUMERATOR / TSC_KHZ_TOL_DENOMINATOR * 2,
+        );
 
         if vm.fd().check_extension(Cap::TscControl) {
             assert!(vcpu.set_tsc_khz(state.tsc_khz.unwrap()).is_ok());