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Subbaraya Sundeep says: ==================== octeontx2: Improve mailbox tracing Octeontx2 VF,PF and AF devices communicate using hardware shared mailbox region where VFs can only to talk to its PFs and PFs can only talk to AF. AF does the entire resource management for all PFs and VFs. The shared mbox region is used for synchronous requests (requests from PF to AF or VF to PF) and async notifications (notifications from AF to PFs or PF to VFs). Sending a request to AF from VF involves various stages like 1. VF allocates message in shared region 2. Triggers interrupt to PF 3. PF upon receiving interrupt from VF will copy the message from VF<->PF region to PF<->AF region 4. Triggers interrupt to AF 5. AF processes it and writes response in PF<->AF region 6. Triggers interrupt to PF 7. PF copies responses from PF<->AF region to VF<->PF region 8. Triggers interrupt to Vf 9. VF reads response in VF<->PF region Due to various stages involved, Tracepoints are used in mailbox code for debugging. Existing tracepoints need some improvements so that maximum information can be inferred from trace logs during an issue. This patchset tries to enhance existing tracepoints and also adds a couple of tracepoints. ==================== Link: https://patch.msgid.link/1747136408-30685-1-git-send-email-sbhatta@marvell.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.