[xen staging] tests/cpu-policy: add sorted MSR test

[patchbot@xxxxxxx]

commit b8e53a81ba538849b98b0d417436f8be653fa1ff
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Tue Apr 13 14:51:44 2021 +0200
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Thu Apr 29 19:27:21 2021 +0100

    tests/cpu-policy: add sorted MSR test
    
    Further changes will rely on MSR entries being sorted, so add a test
    to assert it.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/tests/cpu-policy/test-cpu-policy.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tools/tests/cpu-policy/test-cpu-policy.c 
b/tools/tests/cpu-policy/test-cpu-policy.c
index cb578ca6e5..75973298df 100644
--- a/tools/tests/cpu-policy/test-cpu-policy.c
+++ b/tools/tests/cpu-policy/test-cpu-policy.c
@@ -89,6 +89,16 @@ static bool leaves_are_sorted(const xen_cpuid_leaf_t 
*leaves, unsigned int nr)
     return true;
 }
 
+static bool msrs_are_sorted(const xen_msr_entry_t *entries, unsigned int nr)
+{
+    for ( unsigned int i = 1; i < nr; ++i )
+        /* MSR index went backwards => not sorted. */
+        if ( entries[i - 1].idx > entries[i].idx )
+            return false;
+
+    return true;
+}
+
 static void test_cpuid_current(void)
 {
     struct cpuid_policy p;
@@ -273,6 +283,13 @@ static void test_msr_serialise_success(void)
             goto test_done;
         }
 
+        if ( !msrs_are_sorted(msrs, nr) )
+        {
+            fail("  Test %s, MSR entries not sorted\n",
+                 t->name);
+            goto test_done;
+        }
+
     test_done:
         free(msrs);
     }
--
generated by git-patchbot for /home/xen/git/xen.git#staging