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Project ACRN hypervisor
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Qiang Zhang bf9341844a ptirq: Fix ptirq hash tables
ptirq_remapping_info records which physical interrupt is mapped to
the virtual interrupt in a VM. As we need to knonw whether a physical
sid has been mapped to a VM and whether a virtual sid in a VM has been
used, there should be two hash tables to link and iterate
ptirq_remapping_info:
- One is used to lookup from physical sid, linking phys_link.
- The other is used to lookup from virtual sid in a VM, linking virt_link

Without this patch, phys_link or virt_link from different
ptirq_remapping_info was linked by one hash list head if they got the
same hash value, as shown in following diagram.
When looking for a ptirq_remapping_info from physical sid, the original
code took all hash list node as phys_link and failed to get
ptirq_remapping_info linked with virt_link and later references
to its members are wrong.
The same problem also occurred when looking for a ptirq_remapping_info
from virtual sid and vm.

 ---------- <- hash table
|hlist_head|                                --actual ptirq_remapping_info address
 ----------                      --------- /    --used as ptirq_remapping_info
|    ...   |                    |phys_link| ___/
 ----------      ---------       --------- /     ---------
|hlist_head| -> |phys_link| <-> |virt_link| <-> |phys_link|
 ----------      ---------       ---------       ---------
|    ...   |    |virt_link|     | other   |     |virt_link|
 ----------      ---------      | members |      ---------
                | other   |      ---------      | other   |
                | members |                     | members |
                 ---------                       ---------

Tracked-On: 
Signed-off-by: Qiang Zhang <qiang4.zhang@linux.intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
2023-04-13 12:24:57 +08:00
.github/ISSUE_TEMPLATE Update bug_report.md 2020-07-23 22:50:26 +08:00
debian debian: modify kernel version display to GRUB menuentry 2023-01-11 17:38:38 +08:00
devicemodel asyncio: refine the setup ioctl 2022-11-25 10:43:34 +08:00
doc doc: fix missing numbered-step icon 2023-01-19 17:09:12 -08:00
hypervisor ptirq: Fix ptirq hash tables 2023-04-13 12:24:57 +08:00
misc build(deps): bump tokio 2023-02-09 18:38:55 +08:00
.checkpatch.conf checkpatch: fix the line limit back to 120 2018-10-29 14:10:22 +08:00
.clang-format config_tools: update clang-format file 2021-06-11 12:59:03 +08:00
.deb.conf deb-pkg: add OVMF_debug.fd in .deb.conf 2022-04-20 13:43:08 +08:00
.gitignore ignore debuild intermediate files 2022-11-16 15:43:40 +08:00
.pre-commit-intel Provides a Git pre-commit hook to check Intel copyright header year 2022-06-02 15:20:14 +08:00
CODE_OF_CONDUCT.rst doc: Add CODE_OF_CONDUCT to project repo 2021-09-22 20:13:58 -07:00
CODEOWNERS misc: Update CODEOWNER for doc reviewer changed. 2022-11-14 10:00:41 +08:00
CONTRIBUTING.rst Update TSC members and maintainers 2022-06-08 14:14:27 +08:00
LICENSE Update LICENSE information file 2022-03-15 17:07:18 +08:00
Makefile hv: change the version format 2022-11-21 09:45:26 +08:00
paths.make Makefile: put 'serial.conf' in final location 2022-02-18 18:38:45 +08:00
README.rst doc: add community support and resources to introduction 2022-01-26 17:20:08 -08:00
VERSION version:3.2-unstable 2022-09-30 13:04:03 +08:00

Project ACRN Embedded Hypervisor
################################


.. raw:: html

   <img src="doc/images/ACRN_Logo_PrimaryLockup_COLOR-300x300-1.png"
   height="175px" align="right">

The open source project ACRN defines a device hypervisor reference stack
and an architecture for running multiple software subsystems, managed
securely, on a consolidated system by means of a virtual machine
manager. It also defines a reference framework implementation for
virtual device emulation, called the "ACRN Device Model".

The ACRN Hypervisor is a Type 1 reference hypervisor stack, running
directly on the bare-metal hardware, and is suitable for a variety of
IoT and embedded device solutions. The ACRN hypervisor addresses the
gap that currently exists between datacenter hypervisors, and hard
partitioning hypervisors. The ACRN hypervisor architecture partitions
the system into different functional domains, with carefully selected
guest OS sharing optimizations for IoT and embedded devices.

.. start_include_here

Community Support
*****************

The Project ACRN Developer Community includes developers from member
organizations and the general community all joining in the development of
software within the project. Members contribute and discuss ideas,
submit bugs and bug fixes. They also help those in need
through the community's forums such as mailing lists and IRC channels. Anyone
can join the developer community and the community is always willing to help
its members and the User Community to get the most out of Project ACRN.

Welcome to the project ACRN community!

We're now holding monthly Technical Community Meetings and encourage you
to call in and learn more about the project. Meeting information is on
the `TCM Meeting page`_ in our `ACRN wiki <https://wiki.projectacrn.org/>`_.

.. _TCM Meeting page:
   https://github.com/projectacrn/acrn-hypervisor/wiki/ACRN-Committee-and-Working-Group-Meetings#technical-community-meetings

Resources
*********

Here's a quick summary of resources to find your way around the Project
ACRN support systems:

* **Project ACRN Website**: The https://projectacrn.org website is the
  central source of information about the project. On this site, you'll
  find background and current information about the project as well as
  relevant links to project material.  For a quick start, refer to the
  `ACRN Introduction`_ and `Getting Started Guide`_.

* **Source Code in GitHub**: Project ACRN source code is maintained on a
  public GitHub repository at https://github.com/projectacrn/acrn-hypervisor.
  You'll find information about getting access to the repository and how to
  contribute to the project in this `Contribution Guide`_ document.

* **Documentation**: Project technical documentation is developed
  along with the project's code, and can be found at
  https://projectacrn.github.io.  Additional documentation is maintained in
  the `Project ACRN GitHub wiki`_.

* **Issue Reporting and Tracking**: Requirements and Issue tracking is done in
  the Github issues system: https://github.com/projectacrn/acrn-hypervisor/issues.
  You can browse through the reported issues and submit issues of your own.

* **Reporting a Potential Security Vulnerability**: If you have discovered potential
  security vulnerability in ACRN, please send an e-mail to acrn-security@lists.projectacrn.org.

  It is important to include the following details:

  - The projects and versions affected
  - Detailed description of the vulnerability
  - Information on known exploits

* **Mailing List**: The `Project ACRN Development mailing list`_ is perhaps the most convenient
  way to track developer discussions and to ask your own support questions to
  the project ACRN community.  There are also specific `ACRN mailing list
  subgroups`_ for builds, users, and Technical
  Steering Committee notes, for example.
  You can read through the message archives to follow
  past posts and discussions, a good thing to do to discover more about the
  project.


.. _ACRN Introduction: https://projectacrn.github.io/latest/introduction/
.. _Getting Started Guide: https://projectacrn.github.io/latest/getting-started/
.. _Contribution Guide: https://projectacrn.github.io/latest/contribute.html
.. _Project ACRN GitHub wiki: https://github.com/projectacrn/acrn-hypervisor/wiki
.. _PGP Key: https://www.intel.com/content/www/us/en/security-center/pgp-public-key.html
.. _vulnerability handling guidelines:
   https://www.intel.com/content/www/us/en/security-center/vulnerability-handling-guidelines.html
.. _Project ACRN Development mailing list: https://lists.projectacrn.org/g/acrn-dev
.. _ACRN mailing list subgroups: https://lists.projectacrn.org/g/main/subgroups