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Implement the SBI IPI (Inter-Processor Interrupt) extension to enable guest VMs to send software interrupts between virtual CPUs. The implementation handles the SBI_IPI_SEND_IPI function call, which allows a guest to target one or more vCPUs using either: - A mask (bitmap of target harts relative to a base hart ID) - Broadcast mode (when mask_base is UINT64_MAX) The IPI is delivered by asserting the VS-level software interrupt (VSSIP, bit 2) on each target vCPU. Proper validation is performed to ensure hart IDs are within valid range and all masked harts exist. Tracked-On: #8851 Signed-off-by: Haoyu Tang <haoyu.tang@intel.com> Acked-by: Wang Yu1 <yu1.wang@intel.com>
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/