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linux/drivers/of/of_test.c

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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 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 <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Reviewed-by: David Gow <davidgow@google.com> Cc: Brendan Higgins <brendan.higgins@linux.dev> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20240217010557.2381548-8-sboyd@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
2024-02-16 17:05:56 -08:00
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 <linux@roeck-us.net> Closes: https://lore.kernel.org/r/6cd337fb-38f0-41cb-b942-5844b84433db@roeck-us.net Link: https://lore.kernel.org/r/Zd4dQpHO7em1ji67@FVFF77S0Q05N.cambridge.arm.com [1] Fixes: 893ecc6d2d61 ("of: Add KUnit test to confirm DTB is loaded") Signed-off-by: Stephen Boyd <sboyd@kernel.org> Tested-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20241009204133.1169931-1-sboyd@kernel.org Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
2024-10-09 13:41:31 -07:00
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 <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Reviewed-by: David Gow <davidgow@google.com> Cc: Brendan Higgins <brendan.higgins@linux.dev> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20240217010557.2381548-8-sboyd@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
2024-02-16 17:05:56 -08:00
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 <linux@roeck-us.net> Closes: https://lore.kernel.org/r/6cd337fb-38f0-41cb-b942-5844b84433db@roeck-us.net Link: https://lore.kernel.org/r/Zd4dQpHO7em1ji67@FVFF77S0Q05N.cambridge.arm.com [1] Fixes: 893ecc6d2d61 ("of: Add KUnit test to confirm DTB is loaded") Signed-off-by: Stephen Boyd <sboyd@kernel.org> Tested-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20241009204133.1169931-1-sboyd@kernel.org Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
2024-10-09 13:41:31 -07:00
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 <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Reviewed-by: David Gow <davidgow@google.com> Cc: Brendan Higgins <brendan.higgins@linux.dev> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20240217010557.2381548-8-sboyd@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
2024-02-16 17:05:56 -08:00
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 <quic_jjohnson@quicinc.com> Link: https://lore.kernel.org/r/20240524-md-of-of_test-v1-1-6ebd078d620f@quicinc.com Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
2024-05-24 16:58:26 -07:00
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 <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Reviewed-by: David Gow <davidgow@google.com> Cc: Brendan Higgins <brendan.higgins@linux.dev> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20240217010557.2381548-8-sboyd@kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
2024-02-16 17:05:56 -08:00