pub fn set_extensions_ready()Expand description
Mark SSE/XSAVE extensions as ready.
Called once from kernel_main after init_cpu_extensions() has set
CR4.OSXSAVE and XCR0. Until this is called, all log::info! / etc.
fire the e9_println!("LOG enter") marker but skip the format_args-heavy
formatting paths that can #UD on early boot.