runqemu: add process of option QB_NFSROOTFS_EXTRA_OPT

This extra options to be appended to the nfs rootfs options in kernel
boot arg.

Example config with qemuppc64 in machine config:

add r/w size in the nfs rootfs extra option:
QB_NFSROOTFS_EXTRA_OPT = "wsize=524288,rsize=524288"

re-build and runqemu with nfs again, we can observe the kernel command
line added our defined value in QB_NFSROOTFS_EXTRA_OPT:

Kernel command line: root=/dev/nfs nfsroot=10.0.2.2:/home/xchen5/testing/build/tmp-glibc/deploy/images/qemuppc64/testnfs,nfsvers=3,port=3049,tcp,mountport=3048,wsize=524288,rsize=524288 rw  mem=256M ip=dhcp console=hvc0 console=hvc0 nohugevmalloc

Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

diff --git a/scripts/runqemu b/scripts/runqemu
index ccc557f30857fa5a00d040774efa4619f9c2b252..59073905735dffb6d4a2768679df0393421b779f 100755 (executable)
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -1022,7 +1022,11 @@ class BaseConfig(object):
             # Use '%s' since they are integers
             os.putenv(k, '%s' % v)
 
-        self.unfs_opts="nfsvers=3,port=%s,tcp,mountport=%s" % (nfsd_port, mountd_port)
+        qb_nfsrootfs_extra_opt = self.get("QB_NFSROOTFS_EXTRA_OPT")
+        if qb_nfsrootfs_extra_opt and not qb_nfsrootfs_extra_opt.startswith(","):
+            qb_nfsrootfs_extra_opt = "," + qb_nfsrootfs_extra_opt
+
+        self.unfs_opts="nfsvers=3,port=%s,tcp,mountport=%s%s" % (nfsd_port, mountd_port, qb_nfsrootfs_extra_opt)
 
         # Extract .tar.bz2 or .tar.bz if no nfs dir
         if not (self.rootfs and os.path.isdir(self.rootfs)):