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94524d8fc9
When tls records are decrypted using asynchronous acclerators such as NXP CAAM engine, the crypto apis return -EINPROGRESS. Presently, on getting -EINPROGRESS, the tls record processing stops till the time the crypto accelerator finishes off and returns the result. This incurs a context switch and is not an efficient way of accessing the crypto accelerators. Crypto accelerators work efficient when they are queued with multiple crypto jobs without having to wait for the previous ones to complete. The patch submits multiple crypto requests without having to wait for for previous ones to complete. This has been implemented for records which are decrypted in zero-copy mode. At the end of recvmsg(), we wait for all the asynchronous decryption requests to complete. The references to records which have been sent for async decryption are dropped. For cases where record decryption is not possible in zero-copy mode, asynchronous decryption is not used and we wait for decryption crypto api to complete. For crypto requests executing in async fashion, the memory for aead_request, sglists and skb etc is freed from the decryption completion handler. The decryption completion handler wakesup the sleeping user context when recvmsg() flags that it has done sending all the decryption requests and there are no more decryption requests pending to be completed. Signed-off-by: Vakul Garg <vakul.garg@nxp.com> Reviewed-by: Dave Watson <davejwatson@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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 Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
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.