linux-kernel - [PATCH v4 0/4] Add support for Vendor Defined Error Types in Einj Module

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Date:   Fri, 11 Aug 2023 00:18:59 -0500
From:   Avadhut Naik <avadnaik@....com>
To:     rafael@...nel.org, lenb@...nel.org, linux-acpi@...r.kernel.org
Cc:     yazen.ghannam@....com, alexey.kardashevskiy@....com,
        linux-kernel@...r.kernel.org, Avadhut Naik <avadhut.naik@....com>,
        gregkh@...uxfoundation.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH v4 0/4] Add support for Vendor Defined Error Types in Einj
 Module



On 6/20/2023 22:50, Avadhut Naik wrote:
> From: Avadhut Naik <Avadhut.Naik@....com>
> 
> 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(-)
> 
Hi everyone,

Any further comments on this set? Specifically, for the changes being introduced
in the einj module.

-- 
Thanks,
Avadhut Naik