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b4a23e6c13
RTVM is enforced to use 4KB pages to mitigate CVE-2018-12207 and performance jitter, which may be introduced by splitting large page into 4KB pages on demand. It works fine in previous hardware platform where the size of address space for the RTVM is relatively small. However, this is a problem when the platforms support 64 bits high MMIO space, which could be super large and therefore consumes large # of EPT page table pages. This patch optimize it by using large page for purely data pages, such as MMIO spaces, even for the RTVM. Signed-off-by: Li Fei1 <fei1.li@intel.com> Tracked-On: #5788
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/