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The Nitro Enclaves driver provides an ioctl interface to the user space for enclave lifetime management e.g. enclave creation / termination and setting enclave resources such as memory and CPU. This ioctl interface is mapped to a Nitro Enclaves misc device. Changelog v9 -> v10 * Update commit message to include the changelog before the SoB tag(s). v8 -> v9 * Use the ne_devs data structure to get the refs for the NE misc device in the NE PCI device driver logic. v7 -> v8 * Add define for the CID of the primary / parent VM. * Update the NE PCI driver shutdown logic to include misc device deregister. v6 -> v7 * Set the NE PCI device the parent of the NE misc device to be able to use it in the ioctl logic. * Update the naming and add more comments to make more clear the logic of handling full CPU cores and dedicating them to the enclave. v5 -> v6 * Remove the ioctl to query API version. * Update documentation to kernel-doc format. v4 -> v5 * Update the size of the NE CPU pool string from 4096 to 512 chars. v3 -> v4 * Use dev_err instead of custom NE log pattern. * Remove the NE CPU pool init during kernel module loading, as the CPU pool is now setup at runtime, via a sysfs file for the kernel parameter. * Add minimum enclave memory size definition. v2 -> v3 * Remove the GPL additional wording as SPDX-License-Identifier is already in place. * Remove the WARN_ON calls. * Remove linux/bug and linux/kvm_host includes that are not needed. * Remove "ratelimited" from the logs that are not in the ioctl call paths. * Remove file ops that do nothing for now - open and release. v1 -> v2 * Add log pattern for NE. * Update goto labels to match their purpose. * Update ne_cpu_pool data structure to include the global mutex. * Update NE misc device mode to 0660. * Check if the CPU siblings are included in the NE CPU pool, as full CPU cores are given for the enclave(s). Reviewed-by: Alexander Graf <graf@amazon.com> Signed-off-by: Andra Paraschiv <andraprs@amazon.com> Link: https://lore.kernel.org/r/20200921121732.44291-8-andraprs@amazon.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.
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.