tests: document how to update acpi tables

Looks like no one understands how to do it.
Document the process.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2019-10-05 17:25:55 -04:00
parent 669c77433b
commit 30c63d4fbd

View File

@ -10,6 +10,33 @@
* See the COPYING file in the top-level directory.
*/
/*
* How to add or update the tests:
* Contributor:
* 1. add empty files for new tables, if any, under tests/data/acpi
* 2. list any changed files in tests/bios-tables-test-allowed-diff.h
* 3. commit the above *before* making changes that affect the tables
* Maintainer:
* After 1-3 above tests will pass but ignore differences with the expected files.
* You will also notice that tests/bios-tables-test-allowed-diff.h lists
* a bunch of files. This is your hint that you need to do the below:
* 4. Run
* make check V=1
* this will produce a bunch of warnings about differences
* beween actual and expected ACPI tables. If you have IASL installed,
* they will also be disassembled so you can look at the disassembled
* output. If not - disassemble them yourself in any way you like.
* Look at the differences - make sure they make sense and match what the
* changes you are merging are supposed to do.
*
* 5. From build directory, run:
* $(SRC_PATH)/tests/data/acpi/rebuild-expected-aml.sh
* 6. Now commit any changes.
* 7. Before doing a pull request, make sure tests/bios-tables-test-allowed-diff.h
* is empty - this will ensure following changes to ACPI tables will
* be noticed.
*/
#include "qemu/osdep.h"
#include <glib/gstdio.h>
#include "qemu-common.h"