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Project ACRN hypervisor
a11a10fa4e
In the current hypervisor design, when HPA is not found for the specified gpa by calling gpa2hpa or local_gpa2hpa, 0 will be returned as a error code, but 0 may be a valid HPA for vm0; error checking is missed when invoking gpa2hpa or local_gpa2hpa; when invoking lookup_address, the caller guarantees that parameter pointer pml4_page and pointer pg_size is not NULL. If local_gpa2hpa/gpa2hpa returns a invalid HPA, it means that this function fails to find the HPA of the specified gpa of vm. If local_gpa2hpa/gpa2hpa return value is a valid HPA, it means that this function have found the HPA of the specified gpa of vm. Each valid vm's EPTP is initialized during vm creating, vm's EPTP is valid until this vm is destroyed. So the caller can guarantee parameter pointer pml4_page is not NULL. The caller uses a temporary variable to store page size. So the caller can guarantee parameter pointer pg_size is not NULL. In this patch, define a invalid HPA for gpa2hpa and local_gpa2hpa;add some error checking when invoking local_gpa2hpa/gpa2hpa;add precondition for lookup_address function and remove redundant error checking. V1-->V2: Define INVALID_HPA as a invalid HPA for gpa2hpa and local_gpa2hpa; Updated related error checking when invoking gpa2hpa or local_gpa2hpa; V2-->V3: Add some debug information if specified gpa2hpa mapping doesn't exit and ept_mr_del is called; Update INVALID_HPA definition easier to be reviewed. V3-->V4: Add vm->id and gpa into pr_error; Add precondition to ept_mr_del to cover [gpa,gpa+size) unmapping case. V4-->V5: Update comments; Update pr_error message. Tracked-On: #1258 Signed-off-by: Xiangyang Wu <xiangyang.wu@linux.intel.com> Reviewed-by: Li, Fei1 <fei1.li@intel.com> |
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| hypervisor | ||
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| CODEOWNERS | ||
| LICENSE | ||
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| README.rst | ||
| VERSION | ||
Project ACRN Embedded Hypervisor ################################ 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 ARCN community! We're now holding weekly 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 `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. * **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. .. _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 .. _Project ACRN Development mailing list: https://lists.projectacrn.org/g/acrn-dev .. _ACRN mailing list subgroups: https://lists.projectacrn.org/g/main/subgroups