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Implement the write_vcbm() function to handle the MSR_IA32_type_MASK_n vCBM MSRs write request Call write_vclosid() to handle MSR_IA32_PQR_ASSOC MSR write request Several vCAT P2V (physical to virtual) and V2P (virtual to physical) mappings exist: struct acrn_vm_config *vm_config = get_vm_config(vm_id) max_pcbm = vm_config->max_type_pcbm (type: l2 or l3) mask_shift = ffs64(max_pcbm) vclosid = vmsr - MSR_IA32_type_MASK_0 pclosid = vm_config->pclosids[vclosid] pmsr = MSR_IA32_type_MASK_0 + pclosid pcbm = vcbm << mask_shift vcbm = pcbm >> mask_shift Where MSR_IA32_type_MASK_n: L2 or L3 mask msr address for CLOSIDn, from 0C90H through 0D8FH (inclusive). max_pcbm: a bitmask that selects all the physical cache ways assigned to the VM vclosid: virtual CLOSID, always starts from 0 pclosid: corresponding physical CLOSID for a given vclosid vmsr: virtual msr address, passed to vCAT handlers by the caller functions rdmsr_vmexit_handler()/wrmsr_vmexit_handler() pmsr: physical msr address vcbm: virtual CBM, passed to vCAT handlers by the caller functions rdmsr_vmexit_handler()/wrmsr_vmexit_handler() pcbm: physical CBM Tracked-On: #5917 Signed-off-by: dongshen <dongsheng.x.zhang@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/