[Skiboot] [RFC PATCH v5 12/16] Load the ultravisor from flash and decompress

[Oliver O'Halloran]

On Wed, Mar 25, 2020 at 11:51 AM Alexey Kardashevskiy <aik at ozlabs.ru> wrote:
>
>
>
> On 25/03/2020 02:22, Ryan Grimm wrote:
> > On Thu, 2020-03-12 at 12:08 +1100, Alexey Kardashevskiy wrote:
> >>
> >>> diff --git a/core/init.c b/core/init.c
> >>> index f124f893..1300ab03 100644
> >>> --- a/core/init.c
> >>> +++ b/core/init.c
> >>> @@ -1300,6 +1300,7 @@ void __noreturn __nomcount
> >>> main_cpu_entry(const void *fdt)
> >>>
> >>>     preload_capp_ucode();
> >>>     start_preload_kernel();
> >>> +   uv_preload_image();
> >>
> >>
> >> Can this be a part of init_uv()?
> >>
> >
> > It could but isn't the point to preload it separately early in the boot
> > cause loading from flash or FSP is slow?
>
>
> No idea about how slow it is (Oliver may want to comment) but how moving
> it earlier makes it faster? It is not running in parallel with something
> else here. Thanks,

Didn't look at the code, but the preload_* functions create a job
thread which handles the load in the background while the main thread
is doing other things.