runqemu/qemurunner: Use nodelay with tcp serial connections

This disables Nagle's algorithm for our tcp serial connections which may
be causing data transfer issues.

(From OE-Core rev: f8eff4c427881a98333fdf7c42f66ed6603e4f03)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/conf/machine/include/loongarch/qemuloongarch.inc

@@ -30,6 +30,6 @@ QB_TAP_OPT = "-netdev tap,id=net0,ifname=@TAP@,script=no,downscript=no"
 QB_NETWORK_DEVICE = "-device virtio-net-device,netdev=net0,mac=@MAC@"
 QB_ROOTFS_OPT = "-drive id=disk0,file=@ROOTFS@,if=none,format=raw -device virtio-blk-device,drive=disk0"
 QB_SERIAL_OPT = "-device virtio-serial-pci -chardev null,id=virtcon -device virtconsole,chardev=virtcon"
-QB_TCPSERIAL_OPT = " -device virtio-serial-pci -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1 -device virtconsole,chardev=virtcon"
+QB_TCPSERIAL_OPT = " -device virtio-serial-pci -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1,nodelay=on -device virtconsole,chardev=virtcon"
 # Add the 'virtio-rng-pci' device otherwise the guest may run out of entropy
 QB_OPT_APPEND = " -object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-device,rng=rng0"

meta/conf/machine/include/riscv/qemuriscv.inc

@@ -34,6 +34,6 @@ QB_TAP_OPT = "-netdev tap,id=net0,ifname=@TAP@,script=no,downscript=no"
 QB_NETWORK_DEVICE = "-device virtio-net-device,netdev=net0,mac=@MAC@"
 QB_ROOTFS_OPT = "-drive id=disk0,file=@ROOTFS@,if=none,format=raw -device virtio-blk-device,drive=disk0"
 QB_SERIAL_OPT = "-device virtio-serial-device -chardev null,id=virtcon -device virtconsole,chardev=virtcon"
-QB_TCPSERIAL_OPT = " -device virtio-serial-device -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1 -device virtconsole,chardev=virtcon"
+QB_TCPSERIAL_OPT = " -device virtio-serial-device -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1,nodelay=on -device virtconsole,chardev=virtcon"
 QB_GRAPHICS = "-device bochs-display"
 QB_OPT_APPEND = "-device virtio-tablet-pci -device virtio-keyboard-pci"

meta/conf/machine/qemuarm.conf

@@ -27,6 +27,6 @@ QB_NETWORK_DEVICE = "-device virtio-net-device,netdev=net0,mac=@MAC@"
 QB_ROOTFS_OPT = "-drive id=disk0,file=@ROOTFS@,if=none,format=raw -device virtio-blk-device,drive=disk0"
 # Virtio serial console
 QB_SERIAL_OPT = "-device virtio-serial-device -chardev null,id=virtcon -device virtconsole,chardev=virtcon"
-QB_TCPSERIAL_OPT = "-device virtio-serial-device -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1 -device virtconsole,chardev=virtcon"
+QB_TCPSERIAL_OPT = "-device virtio-serial-device -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1,nodelay=on -device virtconsole,chardev=virtcon"
 
 KMACHINE:qemuarm = "qemuarma15"

meta/conf/machine/qemuarm64.conf

@@ -28,4 +28,4 @@ QB_NETWORK_DEVICE = "-device virtio-net-pci,netdev=net0,mac=@MAC@"
 QB_ROOTFS_OPT = "-drive id=disk0,file=@ROOTFS@,if=none,format=raw -device virtio-blk-pci,drive=disk0"
 # Virtio serial console
 QB_SERIAL_OPT = "-device virtio-serial-pci -chardev null,id=virtcon -device virtconsole,chardev=virtcon"
-QB_TCPSERIAL_OPT = "-device virtio-serial-pci -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1 -device virtconsole,chardev=virtcon"
+QB_TCPSERIAL_OPT = "-device virtio-serial-pci -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1,nodelay=on -device virtconsole,chardev=virtcon"

meta/lib/oeqa/utils/qemurunner.py

@@ -97,6 +97,7 @@ class QemuRunner:
         try:
             sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
             sock.setblocking(0)
+            sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
             sock.bind(("127.0.0.1",0))
             sock.listen(2)
             port = sock.getsockname()[1]

scripts/runqemu

@@ -842,11 +842,11 @@ to your build configuration.
             if self.get('QB_TCPSERIAL_OPT'):
                 self.qemu_opt_script += ' ' + self.get('QB_TCPSERIAL_OPT').replace('@PORT@', port)
             else:
-                self.qemu_opt_script += ' -serial tcp:127.0.0.1:%s' % port
+                self.qemu_opt_script += ' -serial tcp:127.0.0.1:%s,nodelay=on' % port
 
             if len(ports) > 1:
                 for port in ports[1:]:
-                    self.qemu_opt_script += ' -serial tcp:127.0.0.1:%s' % port
+                    self.qemu_opt_script += ' -serial tcp:127.0.0.1:%s,nodelay=on' % port
 
     def check_and_set(self):
         """Check configs sanity and set when needed"""