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f3249e77bd
Currently panic() and pr_xxx() statements before init_primary_pcpu_post() won't be printed, which is inconvenient and misleading for debugging. This patch makes pr_xxx() APIs working before init_pcpu_pre(): - clear .bss in init.c, which makes sense to clear .bss at the very beginning of initialization code. Also this makes it possible to call init_logmsg() before init_pcpu_pre(). - move parse_hv_cmdline() and uart16550_init(true) to init.c. - refine ticks_to_us() to handle the case that it's called before calibrate_tsc(). As a side effect, it prints "0us" in early pr_xxx() calls. - call init_debug_pre() in init_primary_pcpu() and after this point, both printf() and pr_xxx() APIs are available. However, this patch doesn't address the issue that pr_xxx() could be called on PCPUs that set_current_pcpu_id() hasn't been called, which implies that the PCPU ID shown in early logs may not be accurate. Tracked-On: #2987 Signed-off-by: Zide Chen <zide.chen@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/