Re: [Qemu-devel] [PATCH 5/5] tests: acpi: fix FADT not being compared to reference table

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Dec 29, 2017 at 04:16:42PM +0100, Igor Mammedov wrote:
> It turns out that FADT isn't actually tested for changes
> against reference table, since it happens to be the 1st
> table in RSDT which is currently ignored.
> Fix it by making sure that all tables from RSDT are added
> to test list.
> 
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>

This was intentional, wasn't it?
The reason IIRC was that FADT includes things like the DSDT
address which can change at any time.

So I think we'll have to tweak the FADT to compare it.

E.g. replace any non-zero pointer with a known pattern,
and fix up the checksum.

What do you think?

> ---
>  tests/bios-tables-test.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tests/bios-tables-test.c b/tests/bios-tables-test.c
> index 81c558e..c5dccdb 100644
> --- a/tests/bios-tables-test.c
> +++ b/tests/bios-tables-test.c
> @@ -248,14 +248,14 @@ static void test_acpi_dsdt_table(test_data *data)
>  /* Load all tables and add to test list directly RSDT referenced tables */
>  static void fetch_rsdt_referenced_tables(test_data *data)
>  {
> -    int tables_nr = data->rsdt_tables_nr - 1; /* fadt is first */
> +    int tables_nr = data->rsdt_tables_nr;
>      int i;
>  
>      for (i = 0; i < tables_nr; i++) {
>          AcpiSdtTable ssdt_table;
>          uint32_t addr;
>  
> -        addr = le32_to_cpu(data->rsdt_tables_addr[i + 1]); /* fadt is first */
> +        addr = le32_to_cpu(data->rsdt_tables_addr[i]);
>          fetch_table(&ssdt_table, addr);
>  
>          /* Add table to ASL test tables list */
> -- 
> 2.7.4