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This patch introduces vLAPIC state for a VM. The VM vLAPIC state can be one of the following * VM_VLAPIC_X2APIC - All the vCPUs/vLAPICs (Except for those in Disabled mode) of this VM use x2APIC mode * VM_VLAPIC_XAPIC - All the vCPUs/vLAPICs (Except for those in Disabled mode) of this VM use xAPIC mode * VM_VLAPIC_DISABLED - All the vCPUs/vLAPICs of this VM are in Disabled mode * VM_VLAPIC_TRANSITION - Some of the vCPUs/vLAPICs of this VM (Except for those in Disabled mode) are in xAPIC and the others in x2APIC Upon a vCPU updating the IA32_APIC_BASE MSR to switch LAPIC mode, this API is called to sync the vLAPIC state of the VM. Upon VM creation and reset, vLAPIC state is set to VM_VLAPIC_XAPIC, as ACRN starts the vCPUs vLAPIC in XAPIC mode. Tracked-On: #3253 Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com> Acked-by: Eddie Dong <eddie.dong@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/