From: Avadhut Naik <Avadhut.Naik@xxxxxxx> This patchset adds support for Vendor Defined Error types in the einj module by exporting a binary blob file in module's debugfs directory. Userspace tools can write OEM Defined Structures into the blob file as part of injecting Vendor defined errors. The first patch refactors available_error_type_show() function to ensure all errors supported by the platform are output through einj module's available_error_type file in debugfs. The second patch adds a write callback for binary blobs created through debugfs_create_blob() API. The third patch fixes the permissions of panicinfo file in debugfs to ensure it remains read-only The fourth patch adds the required support i.e. establishing the memory mapping and exporting it through debugfs blob file for Vendor-defined Error types. Changes in v2: - Split the v1 patch, as was recommended, to have a separate patch for changes in debugfs. - Refactored available_error_type_show() function into a separate patch. - Changed file permissions to octal format to remove checkpatch warnings. Changes in v3: - Use BIT macro for generating error masks instead of hex values since ACPI spec uses bit numbers. - Handle the corner case of acpi_os_map_iomem() returning NULL through a local variable to a store the size of OEM defined data structure. Changes in v4: - Fix permissions for panicinfo file in debugfs. - Replace acpi_os_map_iomem() and acpi_os_unmap_iomem() calls with acpi_os_map_memory() and acpi_os_unmap_memory() respectively to avert sparse warnings as suggested by Alexey. Avadhut Naik (4): ACPI: APEI: EINJ: Refactor available_error_type_show() fs: debugfs: Add write functionality to debugfs blobs platform/chrome: cros_ec_debugfs: Fix permissions for panicinfo ACPI: APEI: EINJ: Add support for vendor defined error types drivers/acpi/apei/einj.c | 67 ++++++++++++++++------- drivers/platform/chrome/cros_ec_debugfs.c | 2 +- fs/debugfs/file.c | 28 ++++++++-- 3 files changed, 70 insertions(+), 27 deletions(-) -- 2.34.1
