[SLOF] [PATCH slof v2] rtas: Integrate RTAS blob

[Thomas Huth]

On 17/07/2019 06.41, Alexey Kardashevskiy wrote:
> We implement RTAS as a simple binary blob which calls directly into QEMU
> via a custom hcall. So far we were relying on QEMU putting the RTAS blob
> to the guest memory with its location in linux,rtas-base/rtas-size.
> 
> The problems with this are:
> 1. we need to peek a location in the guest ram in addition to slof, FDT
> and sometime kernel and init ram disk; having one less image makes QEMU's
> life easier.
> 2. for secure VMs, it is yet another image which needs to be signed and
> verified.
> 
> This implements "instantiate-rtas" completely in SLOF, including KVM PR
> support ("broken sc1").
> 
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
> ---
> Changes:
> v2:
> * fixed rtas for slof itself
> * removed rtas-entry as it is the same as rtas-base now
> * fixed style
> ---
>  lib/libhvcall/libhvcall.h |  5 +++++
>  lib/libhvcall/brokensc1.c |  2 +-
>  board-qemu/slof/rtas.fs   | 45 ++++++---------------------------------
>  lib/libhvcall/hvcall.S    | 21 ++++++++++++++++++
>  lib/libhvcall/hvcall.code | 14 ++++++++++++
>  lib/libhvcall/hvcall.in   |  1 +
>  6 files changed, 49 insertions(+), 39 deletions(-)

Reviewed-by: Thomas Huth <thuth at redhat.com>