of: address: Add kunit test for __of_address_resource_bounds()

The overflow checking has to deal with different datatypes and
edgecases. Add a new kunit testcase to make sure it works correctly.

Si

of: address: Add kunit test for __of_address_resource_bounds()

The overflow checking has to deal with different datatypes and
edgecases. Add a new kunit testcase to make sure it works correctly.

Signed-off-by: Thomas Weißschuh <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring (Arm) <[email protected]>

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of: Skip kunit tests when arm64+ACPI doesn't populate root node

A root node is required to apply DT overlays. A root node is usually
present after commit 7b937cc243e5 ("of: Create of_root if no dtb

of: Skip kunit tests when arm64+ACPI doesn't populate root node

A root node is required to apply DT overlays. A root node is usually
present after commit 7b937cc243e5 ("of: Create of_root if no dtb
provided by firmware"), except for on arm64 systems booted with ACPI
tables. In that case, the root node is intentionally not populated
because it would "allow DT devices to be instantiated atop an ACPI base
system"[1].

Introduce an OF function that skips the kunit test if the root node
isn't populated. Limit the test to when both CONFIG_ARM64 and
CONFIG_ACPI are set, because otherwise the lack of a root node is a bug.
Make the function private and take a kunit test parameter so that it
can't be abused to test for the presence of the root node in non-test
code.

Use this function to skip tests that require the root node. Currently
that's the DT tests and any tests that apply overlays.

Reported-by: Guenter Roeck <[email protected]>
Closes: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/r/[email protected] [1]
Fixes: 893ecc6d2d61 ("of: Add KUnit test to confirm DTB is loaded")
Signed-off-by: Stephen Boyd <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Acked-by: Mark Rutland <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring (Arm) <[email protected]>

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of: of_test: add MODULE_DESCRIPTION()

Fix the 'make W=1' warning:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/of/of_test.o

Signed-off-by: Jeff Johnson <[email protected]>
Link

of: of_test: add MODULE_DESCRIPTION()

Fix the 'make W=1' warning:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/of/of_test.o

Signed-off-by: Jeff Johnson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring (Arm) <[email protected]>

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of: Add KUnit test to confirm DTB is loaded

Add a KUnit test that confirms a DTB has been loaded, i.e. there is a
root node, and that the of_have_populated_dt() API works properly. We
skip the test

of: Add KUnit test to confirm DTB is loaded

Add a KUnit test that confirms a DTB has been loaded, i.e. there is a
root node, and that the of_have_populated_dt() API works properly. We
skip the test when CONFIG_OF_EARLY_FLATREE=n because in that case we
know architecture code hasn't called unflatten_(and_copy_)?device_tree()
which would populate some sort of root node.

Cc: Rob Herring <[email protected]>
Cc: Frank Rowand <[email protected]>
Reviewed-by: David Gow <[email protected]>
Cc: Brendan Higgins <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>

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