bios-tables-test: add test for number of cores > 255

The new test is run with a large number of cpus and checks if the
core_count field in smbios_cpu_test (structure type 4) is correct.

Choose q35 as it allows to run with -smp > 255.

Signed-off-by: Julia Suvorova <jusual@redhat.com>
Message-Id: <20220731162141.178443-5-jusual@redhat.com>
Message-Id: <20221011111731.101412-5-jusual@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>

tests/qtest/bios-tables-test.c

@@ -92,6 +92,8 @@ typedef struct {
     SmbiosEntryPoint smbios_ep_table;
     uint16_t smbios_cpu_max_speed;
     uint16_t smbios_cpu_curr_speed;
+    uint8_t smbios_core_count;
+    uint16_t smbios_core_count2;
     uint8_t *required_struct_types;
     int required_struct_types_len;
     QTestState *qts;
@@ -631,29 +633,42 @@ static inline bool smbios_single_instance(uint8_t type)
     }
 }
 
-static bool smbios_cpu_test(test_data *data, uint32_t addr)
+static void smbios_cpu_test(test_data *data, uint32_t addr,
+                            SmbiosEntryPointType ep_type)
 {
-    uint16_t expect_speed[2];
-    uint16_t real;
+    uint8_t core_count, expected_core_count = data->smbios_core_count;
+    uint16_t speed, expected_speed[2];
+    uint16_t core_count2, expected_core_count2 = data->smbios_core_count2;
     int offset[2];
     int i;
 
     /* Check CPU speed for backward compatibility */
     offset[0] = offsetof(struct smbios_type_4, max_speed);
     offset[1] = offsetof(struct smbios_type_4, current_speed);
-    expect_speed[0] = data->smbios_cpu_max_speed ? : 2000;
-    expect_speed[1] = data->smbios_cpu_curr_speed ? : 2000;
+    expected_speed[0] = data->smbios_cpu_max_speed ? : 2000;
+    expected_speed[1] = data->smbios_cpu_curr_speed ? : 2000;
 
     for (i = 0; i < 2; i++) {
-        real = qtest_readw(data->qts, addr + offset[i]);
-        if (real != expect_speed[i]) {
-            fprintf(stderr, "Unexpected SMBIOS CPU speed: real %u expect %u\n",
-                    real, expect_speed[i]);
-            return false;
-        }
+        speed = qtest_readw(data->qts, addr + offset[i]);
+        g_assert_cmpuint(speed, ==, expected_speed[i]);
     }
 
-    return true;
+    core_count = qtest_readb(data->qts,
+                    addr + offsetof(struct smbios_type_4, core_count));
+
+    if (expected_core_count) {
+        g_assert_cmpuint(core_count, ==, expected_core_count);
+    }
+
+    if (ep_type == SMBIOS_ENTRY_POINT_TYPE_64) {
+        core_count2 = qtest_readw(data->qts,
+                          addr + offsetof(struct smbios_type_4, core_count2));
+
+        /* Core Count has reached its limit, checking Core Count 2 */
+        if (expected_core_count == 0xFF && expected_core_count2) {
+            g_assert_cmpuint(core_count2, ==, expected_core_count2);
+        }
+    }
 }
 
 static void test_smbios_structs(test_data *data, SmbiosEntryPointType ep_type)
@@ -686,7 +701,7 @@ static void test_smbios_structs(test_data *data, SmbiosEntryPointType ep_type)
         set_bit(type, struct_bitmap);
 
         if (type == 4) {
-            g_assert(smbios_cpu_test(data, addr));
+            smbios_cpu_test(data, addr, ep_type);
         }
 
         /* seek to end of unformatted string area of this struct ("\0\0") */
@@ -908,6 +923,21 @@ static void test_acpi_q35_tcg(void)
     free_test_data(&data);
 }
 
+static void test_acpi_q35_tcg_core_count2(void)
+{
+    test_data data = {
+        .machine = MACHINE_Q35,
+        .variant = ".core-count2",
+        .required_struct_types = base_required_struct_types,
+        .required_struct_types_len = ARRAY_SIZE(base_required_struct_types),
+        .smbios_core_count = 0xFF,
+        .smbios_core_count2 = 275,
+    };
+
+    test_acpi_one("-machine smbios-entry-point-type=64 -smp 275", &data);
+    free_test_data(&data);
+}
+
 static void test_acpi_q35_tcg_bridge(void)
 {
     test_data data;
@@ -1994,6 +2024,8 @@ int main(int argc, char *argv[])
             if (has_kvm) {
                 qtest_add_func("acpi/q35/kvm/xapic", test_acpi_q35_kvm_xapic);
                 qtest_add_func("acpi/q35/kvm/dmar", test_acpi_q35_kvm_dmar);
+                qtest_add_func("acpi/q35/core-count2",
+                               test_acpi_q35_tcg_core_count2);
             }
             qtest_add_func("acpi/q35/viot", test_acpi_q35_viot);
 #ifdef CONFIG_POSIX