[PATCH 4/5] start_vm: Add RISC-V 64-bit support

[Jan Kiszka <jan.kiszka@siemens.com>]

From: Jan Kiszka <jan.kiszka@siemens.com>

This arch is still special in that QEMU does not support directly
booting the kernel via "-kernel". Rather, you need to install opensbi on
the host and load fw_jump.elf as kernel while the actual kernel goes at
a magic address via the loader device.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 scripts/start_vm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/start_vm b/scripts/start_vm
index 71b55f25..8801cf88 100755
--- a/scripts/start_vm
+++ b/scripts/start_vm
@@ -122,6 +122,10 @@ case "$IMAGE_TYPE" in
     QKERNEL=$IMAGE_DIR/${KERNEL_IMAGE}
     QINITRD=/dev/null
     [ -n "$INITRD_IMAGE" ] && QINITRD=$IMAGE_DIR/${INITRD_IMAGE}
+    if [ "$ARCH" = "riscv64" ]; then
+        EXTRA_ARGS="$EXTRA_ARGS -device loader,file=$QKERNEL,addr=0x80200000"
+        QKERNEL="/usr/lib/riscv64-linux-gnu/opensbi/qemu/virt/fw_jump.elf"
+    fi
     EXTRA_ARGS="$EXTRA_ARGS \
 	-kernel $QKERNEL \
 	-initrd $QINITRD"
-- 
2.16.4