qemu: format device-iotlb on intel-iommu command line

Format the device-iotlb attribute.

https://bugzilla.redhat.com/show_bug.cgi?id=1283251

Reviewed-by: Pavel Hrdina <phrdina@redhat.com>

src/qemu/qemu_capabilities.c

@@ -372,6 +372,8 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
               "intel-iommu.intremap",
               "intel-iommu.caching-mode",
               "intel-iommu.eim",
+
+              "intel-iommu.device-iotlb", /* 260 */
     );
 
 
@@ -1730,6 +1732,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsIntelIOMMU[] = {
     { "intremap", QEMU_CAPS_INTEL_IOMMU_INTREMAP },
     { "caching-mode", QEMU_CAPS_INTEL_IOMMU_CACHING_MODE },
     { "eim", QEMU_CAPS_INTEL_IOMMU_EIM },
+    { "device-iotlb", QEMU_CAPS_INTEL_IOMMU_DEVICE_IOTLB },
 };
 
 /* see documentation for virQEMUCapsQMPSchemaGetByPath for the query format */

src/qemu/qemu_capabilities.h

@@ -411,6 +411,9 @@ typedef enum {
     QEMU_CAPS_INTEL_IOMMU_CACHING_MODE, /* intel-iommu.caching-mode */
     QEMU_CAPS_INTEL_IOMMU_EIM, /* intel-iommu.eim */
 
+    /* 260 */
+    QEMU_CAPS_INTEL_IOMMU_DEVICE_IOTLB, /* intel-iommu.device-iotlb */
+
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
 

src/qemu/qemu_command.c

@@ -6698,6 +6698,13 @@ qemuBuildIOMMUCommandLine(virCommandPtr cmd,
                              "with this QEMU binary"));
             return -1;
         }
+        if (iommu->iotlb != VIR_TRISTATE_SWITCH_ABSENT &&
+            !virQEMUCapsGet(qemuCaps, QEMU_CAPS_INTEL_IOMMU_DEVICE_IOTLB)) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("iommu: device IOTLB is not supported "
+                             "with this QEMU binary"));
+            return -1;
+        }
         break;
     case VIR_DOMAIN_IOMMU_MODEL_LAST:
         break;
@@ -6735,6 +6742,10 @@ qemuBuildIOMMUCommandLine(virCommandPtr cmd,
             virBufferAsprintf(&opts, ",eim=%s",
                               virTristateSwitchTypeToString(iommu->eim));
         }
+        if (iommu->iotlb != VIR_TRISTATE_SWITCH_ABSENT) {
+            virBufferAsprintf(&opts, ",device-iotlb=%s",
+                              virTristateSwitchTypeToString(iommu->iotlb));
+        }
     case VIR_DOMAIN_IOMMU_MODEL_LAST:
         break;
     }

tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml

@@ -215,6 +215,7 @@
   <flag name='intel-iommu.intremap'/>
   <flag name='intel-iommu.caching-mode'/>
   <flag name='intel-iommu.eim'/>
+  <flag name='intel-iommu.device-iotlb'/>
   <version>2009000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.9.0)</package>

tests/qemuxml2argvdata/qemuxml2argv-intel-iommu-device-iotlb.args

@@ -0,0 +1,19 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name QEMUGuest1 \
+-S \
+-machine q35,accel=kvm,kernel_irqchip=split \
+-m 214 \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-device intel-iommu,intremap=on,device-iotlb=on

tests/qemuxml2argvtest.c

@@ -2536,6 +2536,13 @@ mymain(void)
             QEMU_CAPS_INTEL_IOMMU_INTREMAP,
             QEMU_CAPS_INTEL_IOMMU_EIM,
             QEMU_CAPS_DEVICE_INTEL_IOMMU);
+    DO_TEST("intel-iommu-device-iotlb",
+            QEMU_CAPS_MACHINE_OPT,
+            QEMU_CAPS_MACHINE_KERNEL_IRQCHIP,
+            QEMU_CAPS_MACHINE_KERNEL_IRQCHIP_SPLIT,
+            QEMU_CAPS_INTEL_IOMMU_INTREMAP,
+            QEMU_CAPS_INTEL_IOMMU_DEVICE_IOTLB,
+            QEMU_CAPS_DEVICE_INTEL_IOMMU);
 
     DO_TEST("cpu-hotplug-startup", QEMU_CAPS_QUERY_HOTPLUGGABLE_CPUS);