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When a guest OS performs an RTC change action, we wish this event be captured by developers, and then they can decide what to do with it. (e.g., whether to change physical RTC) There are some facts that makes RTC change event a bit complicated: - There are 7 RTC date/time regs (year, month…). They can only be updated one by one. - RTC time is not reliable before date/time update is finished. - Guests can update RTC date/time regs in any order. - Guests may update RTC date/time regs during either RTC halted or not halted. A single date/time update event is not reliable. We have to wait for the guest to finish the update process. So the DM's event handler sets up a timer, and wait for some time (1 second). If no more change happens befor the timer expires, we can conclude that the RTC change has been done. Then the rtc change event is emitted. This logic of event handler can be used to process HV vrtc time change event too. Tracked-On: #8547 Signed-off-by: Wu Zhou <wu.zhou@intel.com> Reviewed-by: Jian Jun Chen <jian.jun.chen@intel.com> |
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| acpi_parser | ||
| arch/x86 | ||
| boot | ||
| bsp/ld | ||
| common | ||
| debug | ||
| dm | ||
| hw | ||
| include | ||
| lib | ||
| quirks | ||
| release | ||
| scripts | ||
| Makefile | ||
| README.rst | ||
ACRN 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. You can find out more about Project ACRN on the `Project ACRN documentation`_ website. .. _`Project ACRN`: https://projectacrn.org .. _`ACRN Hypervisor`: https://github.com/projectacrn/acrn-hypervisor .. _`Project ACRN documentation`: https://projectacrn.github.io/