Implement hcall based RTAS for pSeries machines

On pSeries machines, operating systems can instantiate "RTAS" (Run-Time
Abstraction Services), a runtime component of the firmware which implements
a number of low-level, infrequently used operations.  On logical partitions
under a hypervisor, many of the RTAS functions require hypervisor
privilege.  For simplicity, therefore, hypervisor systems typically
implement the in-partition RTAS as just a tiny wrapper around a hypercall
which actually implements the various RTAS functions.

This patch implements such a hypercall based RTAS for our emulated pSeries
machine.  A tiny in-partition "firmware" calls a new hypercall, which
looks up available RTAS services in a table.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/configure b/configure
index 5a5827f6db..7d8d890891 100755
--- a/configure
+++ b/configure
@@ -2461,7 +2461,9 @@ if test \( "$cpu" = "i386" -o "$cpu" = "x86_64" \) -a \
         "$softmmu" = yes ; then
   roms="optionrom"
 fi
-
+if test "$cpu" = "ppc64" ; then
+  roms="$roms spapr-rtas"
+fi
 
 echo "Install prefix    $prefix"
 echo "BIOS directory    `eval echo $datadir`"