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TLFS spec defines that when a VM is created, the value of HV_X64_MSR_TIME_REF_COUNT is set to zero. Now tsc_offset is not supported properly, so guest get a drifted reference time. This patch implements tsc_offset. tsc_scale and tsc_offset are calculated when a VM is launched and are saved in struct acrn_hyperv of struct acrn_vm. Tracked-On: #5956 Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com> Signed-off-by: Shuo A Liu <shuo.a.liu@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/