[PATCH] selftests/rseq: Add config fragment

[Mark Brown]

Currently we do not provide a config fragment for the rseq selftests but
there are several options which are either required or helpful for
running them:

 - CONFIG_RSEQ is required for obvious reasons, it is enabled by default
   but it doesn't hurt to specify it in case the user is usinsg a
   defconfig that disables it.

 - CONFIG_RSEQ_DEBUG_DEFAULT_ENABLE turns on runtime debug checks which
   would for example have helped spot some of the recent issues we've
   seen on arm64:

      https://lore.kernel.org/all/87zf2u28d1.ffs@tglx/

 - CONFIG_DEBUG_RSEQ enables debugging on configurations that don't have
   generic entry support.

 - CONFIG_RSEQ_SLICE_EXTENSION is tested by the slice_test test, the
   test will fail without it.

Add a configuration fragment which enables these options, helping
encourage CI systems and people doing manual testing to run the tests
with all the features and additional checks.  We also enable
CONFIG_DEBUG_KERNEL and CONFIG_EXPERT which are dependencies for these
options.

Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 tools/testing/selftests/rseq/config | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/testing/selftests/rseq/config b/tools/testing/selftests/rseq/config
new file mode 100644
index 000000000000..d11b8c61530e
--- /dev/null
+++ b/tools/testing/selftests/rseq/config
@@ -0,0 +1,6 @@
+CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_RSEQ=y
+CONFIG_EXPERT=y
+CONFIG_RSEQ=y
+CONFIG_RSEQ_DEBUG_DEFAULT_ENABLE=y
+CONFIG_RSEQ_SLICE_EXTENSION=y

---
base-commit: 2e68039281932e6dc37718a1ea7cbb8e2cda42e6
change-id: 20260423-selftests-rseq-config-fragment-65f09caf0276

Best regards,
--  
Mark Brown <broonie@xxxxxxxxxx>