qemu: Use -vga none only if it is supported

Commit febc591683 introduced -vga none in
case no video card is included in domain XML. However, old qemu
versions do not support this and such domain cannot be successfully
started.

src/qemu/qemu_conf.c

@@ -1220,6 +1220,7 @@ static unsigned long long qemudComputeCmdFlags(const char *help,
                                                unsigned int kvm_version)
 {
     unsigned long long flags = 0;
+    const char *p;
 
     if (strstr(help, "-no-kqemu"))
         flags |= QEMUD_CMD_FLAG_KQEMU;
@@ -1252,11 +1253,15 @@ static unsigned long long qemudComputeCmdFlags(const char *help,
         if (strstr(help, "readonly="))
             flags |= QEMUD_CMD_FLAG_DRIVE_READONLY;
     }
-    if (strstr(help, "-vga") && !strstr(help, "-std-vga")) {
+    if ((p = strstr(help, "-vga")) && !strstr(help, "-std-vga")) {
+        const char *nl = strstr(p, "\n");
+
         flags |= QEMUD_CMD_FLAG_VGA;
 
-        if (strstr(help, "|qxl"))
+        if (strstr(p, "|qxl"))
             flags |= QEMUD_CMD_FLAG_VGA_QXL;
+        if ((p = strstr(p, "|none")) && p < nl)
+            flags |= QEMUD_CMD_FLAG_VGA_NONE;
     }
     if (strstr(help, "-spice"))
         flags |= QEMUD_CMD_FLAG_SPICE;
@@ -5192,7 +5197,8 @@ qemudBuildCommandLine(virConnectPtr conn,
     } else {
         /* If we have -device, then we set -nodefault already */
         if (!(qemuCmdFlags & QEMUD_CMD_FLAG_DEVICE) &&
-            (qemuCmdFlags & QEMUD_CMD_FLAG_VGA))
+            (qemuCmdFlags & QEMUD_CMD_FLAG_VGA) &&
+            (qemuCmdFlags & QEMUD_CMD_FLAG_VGA_NONE))
             virCommandAddArgList(cmd, "-vga", "none", NULL);
     }
 

src/qemu/qemu_conf.h

@@ -103,6 +103,7 @@ enum qemud_cmd_flags {
     QEMUD_CMD_FLAG_SMBIOS_TYPE   = (1LL << 44), /* Is -smbios type= available */
     QEMUD_CMD_FLAG_VGA_QXL       = (1LL << 45), /* The 'qxl' arg for '-vga' */
     QEMUD_CMD_FLAG_SPICE         = (1LL << 46), /* Is -spice avail */
+    QEMUD_CMD_FLAG_VGA_NONE      = (1LL << 47), /* The 'none' arg for '-vga' */
 };
 
 /* Main driver state */

tests/qemuhelptest.c

@@ -173,7 +173,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_ENABLE_KVM |
             QEMUD_CMD_FLAG_SDL |
             QEMUD_CMD_FLAG_RTC_TD_HACK |
-            QEMUD_CMD_FLAG_NO_HPET,
+            QEMUD_CMD_FLAG_NO_HPET |
+            QEMUD_CMD_FLAG_VGA_NONE,
             10005, 0,  0);
     DO_TEST("qemu-kvm-0.10.5",
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -198,7 +199,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_NO_HPET |
             QEMUD_CMD_FLAG_NO_KVM_PIT |
             QEMUD_CMD_FLAG_TDF |
-            QEMUD_CMD_FLAG_NESTING,
+            QEMUD_CMD_FLAG_NESTING |
+            QEMUD_CMD_FLAG_VGA_NONE,
             10005, 1,  0);
     DO_TEST("kvm-86",
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -223,7 +225,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_NO_KVM_PIT |
             QEMUD_CMD_FLAG_TDF |
             QEMUD_CMD_FLAG_NESTING |
-            QEMUD_CMD_FLAG_SMBIOS_TYPE,
+            QEMUD_CMD_FLAG_SMBIOS_TYPE |
+            QEMUD_CMD_FLAG_VGA_NONE,
             10050, 1,  0);
     DO_TEST("qemu-kvm-0.11.0-rc2",
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -253,7 +256,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_BOOT_MENU |
             QEMUD_CMD_FLAG_NESTING |
             QEMUD_CMD_FLAG_NAME_PROCESS |
-            QEMUD_CMD_FLAG_SMBIOS_TYPE,
+            QEMUD_CMD_FLAG_SMBIOS_TYPE |
+            QEMUD_CMD_FLAG_VGA_NONE,
             10092, 1,  0);
     DO_TEST("qemu-0.12.1",
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -281,7 +285,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_NO_HPET |
             QEMUD_CMD_FLAG_BOOT_MENU |
             QEMUD_CMD_FLAG_NAME_PROCESS |
-            QEMUD_CMD_FLAG_SMBIOS_TYPE,
+            QEMUD_CMD_FLAG_SMBIOS_TYPE |
+            QEMUD_CMD_FLAG_VGA_NONE,
             12001, 0,  0);
     DO_TEST("qemu-kvm-0.12.3",
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -316,7 +321,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_BOOT_MENU |
             QEMUD_CMD_FLAG_NESTING |
             QEMUD_CMD_FLAG_NAME_PROCESS |
-            QEMUD_CMD_FLAG_SMBIOS_TYPE,
+            QEMUD_CMD_FLAG_SMBIOS_TYPE |
+            QEMUD_CMD_FLAG_VGA_NONE,
             12003, 1,  0);
 
     return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;

tests/qemuxml2argvdata/qemuxml2argv-nographics.args

@@ -0,0 +1 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-nographics.xml

@@ -0,0 +1,25 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory>219200</memory>
+  <currentMemory>219200</currentMemory>
+  <vcpu>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' unit='0'/>
+    </disk>
+    <controller type='ide' index='0'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -325,7 +325,9 @@ mymain(int argc, char **argv)
 
     DO_TEST("graphics-sdl", 0, false);
     DO_TEST("graphics-sdl-fullscreen", 0, false);
-    DO_TEST("nographics-vga", QEMUD_CMD_FLAG_VGA, false);
+    DO_TEST("nographics", QEMUD_CMD_FLAG_VGA, false);
+    DO_TEST("nographics-vga", QEMUD_CMD_FLAG_VGA |
+                              QEMUD_CMD_FLAG_VGA_NONE, false);
     DO_TEST("graphics-spice",
             QEMUD_CMD_FLAG_VGA | QEMUD_CMD_FLAG_VGA_QXL |
             QEMUD_CMD_FLAG_DEVICE | QEMUD_CMD_FLAG_SPICE, false);