Re: [PATCH v2 4/5] bios-tables-test: add test for number of cores > 255

[Igor Mammedov <imammedo@redhat.com>]

On Sun, 31 Jul 2022 18:21:40 +0200
Julia Suvorova <jusual@redhat.com> wrote:

> 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>

pls, run checkpatch on patches and fix up whatever it complains about
before posting

> ---
>  tests/qtest/bios-tables-test.c | 53 +++++++++++++++++++++++++---------
>  1 file changed, 40 insertions(+), 13 deletions(-)
> 
> diff --git a/tests/qtest/bios-tables-test.c b/tests/qtest/bios-tables-test.c
> index e352d5249f..cebfa430ac 100644
> --- a/tests/qtest/bios-tables-test.c
> +++ b/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 +633,38 @@ 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)
>  {
> -    uint16_t expect_speed[2];
> -    uint16_t real;
> +    uint8_t core_count, expected_core_count = data->smbios_core_count;
> +    uint16_t speed, core_count2, expected_core_count2 = data->smbios_core_count2;
> +    uint16_t expected_speed[2];
>      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));
> +    core_count2 = qtest_readw(data->qts,
> +                              addr + offsetof(struct smbios_type_4, core_count2));

it doesn't really matter here, that we read bogus core_count2 in case of v2 tables,
but to be cleaner I'd move reads above below respective 'if's 

> +    if (expected_core_count) {
> +        g_assert_cmpuint(core_count, ==, expected_core_count);
> +    }
> +
> +    /* 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 +697,7 @@ 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);
>          }
>  
>          /* seek to end of unformatted string area of this struct ("\0\0") */
> @@ -903,6 +914,21 @@ 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;
> @@ -1822,6 +1848,7 @@ int main(int argc, char *argv[])
>          qtest_add_func("acpi/piix4/pci-hotplug/off",
>                         test_acpi_piix4_no_acpi_pci_hotplug);
>          qtest_add_func("acpi/q35", test_acpi_q35_tcg);
> +        qtest_add_func("acpi/q35/core-count2", test_acpi_q35_tcg_core_count2);

shouldn't we have a test for #cpus < 256 as well?

>          qtest_add_func("acpi/q35/bridge", test_acpi_q35_tcg_bridge);
>          qtest_add_func("acpi/q35/multif-bridge", test_acpi_q35_multif_bridge);
>          qtest_add_func("acpi/q35/mmio64", test_acpi_q35_tcg_mmio64);