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When booting prelaunch RTVM with SSRAM enabled, we need to delete the SSRAM region that is used by prelaunch RTVM from Service VM EPT mapping. If it is not used, or it is not fully used, the SSRAM or the rest SSRAM should be in Service VM map. But current code has a issue that it always deletes all SSRAM region from Service VM EPT, even when no SSRAM is enabled for prelaunch RTVM. This could cause the post RTVM with SSRAM boot failure, as DM checks and removes SSRAM region from Service VM EPT during post RTVM setup. Changing get_software_sram_size() to PRE_RTVM_SW_SRAM_MAX_SIZE could solve the issue, as PRE_RTVM_SW_SRAM_MAX_SIZE is the SSRAM size that prelaunch RTVM actually uses. Tracked-On: #7401 Signed-off-by: Zhou, Wu <wu.zhou@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/