qemu_command: Separate domain features building into a helper

The qemuBuildMachineCommandLine() function is needlessly long.
Separate out parts that generate arguments based on
domainDef->features[] into
qemuAppendDomainFeaturesMachineParam(). Unfortunately, expected
outputs for some qemuxml2argvdata cases needed to be updated
because the order in which features are generated is changed. But
there's no functional change.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>

src/qemu/qemu_command.c

@@ -6956,48 +6956,21 @@ qemuBuildNameCommandLine(virCommand *cmd,
     return 0;
 }
 
+
 static int
-qemuBuildMachineCommandLine(virCommand *cmd,
-                            virQEMUDriverConfig *cfg,
+qemuAppendDomainFeaturesMachineParam(virBuffer *buf,
                                      const virDomainDef *def,
-                            virQEMUCaps *qemuCaps,
-                            qemuDomainObjPrivate *priv)
+                                     virQEMUCaps *qemuCaps)
 {
     virTristateSwitch vmport = def->features[VIR_DOMAIN_FEATURE_VMPORT];
     virTristateSwitch smm = def->features[VIR_DOMAIN_FEATURE_SMM];
-    virCPUDef *cpu = def->cpu;
-    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
-    size_t i;
-
-    virCommandAddArg(cmd, "-machine");
-    virBufferAdd(&buf, def->os.machine, -1);
-
-    /* To avoid the collision of creating USB controllers when calling
-     * machine->init in QEMU, it needs to set usb=off
-     */
-    virBufferAddLit(&buf, ",usb=off");
 
     if (vmport != VIR_TRISTATE_SWITCH_ABSENT)
-        virBufferAsprintf(&buf, ",vmport=%s",
+        virBufferAsprintf(buf, ",vmport=%s",
                           virTristateSwitchTypeToString(vmport));
 
-    if (smm)
-        virBufferAsprintf(&buf, ",smm=%s", virTristateSwitchTypeToString(smm));
-
-    if (def->mem.dump_core) {
-        virBufferAsprintf(&buf, ",dump-guest-core=%s",
-                          virTristateSwitchTypeToString(def->mem.dump_core));
-    } else {
-        virBufferAsprintf(&buf, ",dump-guest-core=%s",
-                          cfg->dumpGuestCore ? "on" : "off");
-    }
-
-    if (def->mem.nosharepages)
-        virBufferAddLit(&buf, ",mem-merge=off");
-
-    if (def->keywrap &&
-        !qemuAppendKeyWrapMachineParms(&buf, qemuCaps, def->keywrap))
-        return -1;
+    if (smm != VIR_TRISTATE_SWITCH_ABSENT)
+        virBufferAsprintf(buf, ",smm=%s", virTristateSwitchTypeToString(smm));
 
     if (def->features[VIR_DOMAIN_FEATURE_GIC] == VIR_TRISTATE_SWITCH_ON) {
         bool hasGICVersionOption = virQEMUCapsGet(qemuCaps,
@@ -7025,7 +6998,7 @@ qemuBuildMachineCommandLine(virCommand *cmd,
                 return -1;
             }
 
-            virBufferAsprintf(&buf, ",gic-version=%s",
+            virBufferAsprintf(buf, ",gic-version=%s",
                               virGICVersionTypeToString(def->gic_version));
             break;
 
@@ -7036,6 +7009,107 @@ qemuBuildMachineCommandLine(virCommand *cmd,
         }
     }
 
+    if (def->features[VIR_DOMAIN_FEATURE_IOAPIC] != VIR_DOMAIN_IOAPIC_NONE) {
+        switch ((virDomainIOAPIC) def->features[VIR_DOMAIN_FEATURE_IOAPIC]) {
+        case VIR_DOMAIN_IOAPIC_QEMU:
+            virBufferAddLit(buf, ",kernel_irqchip=split");
+            break;
+        case VIR_DOMAIN_IOAPIC_KVM:
+            virBufferAddLit(buf, ",kernel_irqchip=on");
+            break;
+        case VIR_DOMAIN_IOAPIC_NONE:
+        case VIR_DOMAIN_IOAPIC_LAST:
+            break;
+        }
+    }
+
+    if (def->features[VIR_DOMAIN_FEATURE_HPT] == VIR_TRISTATE_SWITCH_ON) {
+
+        if (def->hpt_resizing != VIR_DOMAIN_HPT_RESIZING_NONE) {
+            virBufferAsprintf(buf, ",resize-hpt=%s",
+                              virDomainHPTResizingTypeToString(def->hpt_resizing));
+        }
+
+        if (def->hpt_maxpagesize > 0) {
+            virBufferAsprintf(buf, ",cap-hpt-max-page-size=%lluk",
+                              def->hpt_maxpagesize);
+        }
+    }
+
+    if (def->features[VIR_DOMAIN_FEATURE_HTM] != VIR_TRISTATE_SWITCH_ABSENT) {
+        const char *str;
+        str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_HTM]);
+        virBufferAsprintf(buf, ",cap-htm=%s", str);
+    }
+
+    if (def->features[VIR_DOMAIN_FEATURE_NESTED_HV] != VIR_TRISTATE_SWITCH_ABSENT) {
+        const char *str;
+        str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_NESTED_HV]);
+        virBufferAsprintf(buf, ",cap-nested-hv=%s", str);
+    }
+
+    if (def->features[VIR_DOMAIN_FEATURE_CCF_ASSIST] != VIR_TRISTATE_SWITCH_ABSENT) {
+        const char *str;
+        str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_CCF_ASSIST]);
+        virBufferAsprintf(buf, ",cap-ccf-assist=%s", str);
+    }
+
+    if (def->features[VIR_DOMAIN_FEATURE_CFPC] != VIR_DOMAIN_CFPC_NONE) {
+        const char *str = virDomainCFPCTypeToString(def->features[VIR_DOMAIN_FEATURE_CFPC]);
+        virBufferAsprintf(buf, ",cap-cfpc=%s", str);
+    }
+
+    if (def->features[VIR_DOMAIN_FEATURE_SBBC] != VIR_DOMAIN_SBBC_NONE) {
+        const char *str = virDomainSBBCTypeToString(def->features[VIR_DOMAIN_FEATURE_SBBC]);
+        virBufferAsprintf(buf, ",cap-sbbc=%s", str);
+    }
+
+    if (def->features[VIR_DOMAIN_FEATURE_IBS] != VIR_DOMAIN_IBS_NONE) {
+        const char *str = virDomainIBSTypeToString(def->features[VIR_DOMAIN_FEATURE_IBS]);
+        virBufferAsprintf(buf, ",cap-ibs=%s", str);
+    }
+
+    return 0;
+}
+
+
+static int
+qemuBuildMachineCommandLine(virCommand *cmd,
+                            virQEMUDriverConfig *cfg,
+                            const virDomainDef *def,
+                            virQEMUCaps *qemuCaps,
+                            qemuDomainObjPrivate *priv)
+{
+    virCPUDef *cpu = def->cpu;
+    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
+    size_t i;
+
+    virCommandAddArg(cmd, "-machine");
+    virBufferAdd(&buf, def->os.machine, -1);
+
+    /* To avoid the collision of creating USB controllers when calling
+     * machine->init in QEMU, it needs to set usb=off
+     */
+    virBufferAddLit(&buf, ",usb=off");
+
+    if (def->mem.dump_core) {
+        virBufferAsprintf(&buf, ",dump-guest-core=%s",
+                          virTristateSwitchTypeToString(def->mem.dump_core));
+    } else {
+        virBufferAsprintf(&buf, ",dump-guest-core=%s",
+                          cfg->dumpGuestCore ? "on" : "off");
+    }
+
+    if (def->mem.nosharepages)
+        virBufferAddLit(&buf, ",mem-merge=off");
+
+    if (def->keywrap &&
+        !qemuAppendKeyWrapMachineParms(&buf, qemuCaps, def->keywrap))
+        return -1;
+
+    if (qemuAppendDomainFeaturesMachineParam(&buf, def, qemuCaps) < 0)
+        return -1;
+
     if (def->iommu) {
         switch (def->iommu->model) {
         case VIR_DOMAIN_IOMMU_MODEL_SMMUV3:
@@ -7061,66 +7135,6 @@ qemuBuildMachineCommandLine(virCommand *cmd,
         }
     }
 
-    if (def->features[VIR_DOMAIN_FEATURE_IOAPIC] != VIR_DOMAIN_IOAPIC_NONE) {
-        switch ((virDomainIOAPIC) def->features[VIR_DOMAIN_FEATURE_IOAPIC]) {
-        case VIR_DOMAIN_IOAPIC_QEMU:
-            virBufferAddLit(&buf, ",kernel_irqchip=split");
-            break;
-        case VIR_DOMAIN_IOAPIC_KVM:
-            virBufferAddLit(&buf, ",kernel_irqchip=on");
-            break;
-        case VIR_DOMAIN_IOAPIC_NONE:
-        case VIR_DOMAIN_IOAPIC_LAST:
-            break;
-        }
-    }
-
-    if (def->features[VIR_DOMAIN_FEATURE_HPT] == VIR_TRISTATE_SWITCH_ON) {
-
-        if (def->hpt_resizing != VIR_DOMAIN_HPT_RESIZING_NONE) {
-            virBufferAsprintf(&buf, ",resize-hpt=%s",
-                              virDomainHPTResizingTypeToString(def->hpt_resizing));
-        }
-
-        if (def->hpt_maxpagesize > 0) {
-            virBufferAsprintf(&buf, ",cap-hpt-max-page-size=%lluk",
-                              def->hpt_maxpagesize);
-        }
-    }
-
-    if (def->features[VIR_DOMAIN_FEATURE_HTM] != VIR_TRISTATE_SWITCH_ABSENT) {
-        const char *str;
-        str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_HTM]);
-        virBufferAsprintf(&buf, ",cap-htm=%s", str);
-    }
-
-    if (def->features[VIR_DOMAIN_FEATURE_NESTED_HV] != VIR_TRISTATE_SWITCH_ABSENT) {
-        const char *str;
-        str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_NESTED_HV]);
-        virBufferAsprintf(&buf, ",cap-nested-hv=%s", str);
-    }
-
-    if (def->features[VIR_DOMAIN_FEATURE_CCF_ASSIST] != VIR_TRISTATE_SWITCH_ABSENT) {
-        const char *str;
-        str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_CCF_ASSIST]);
-        virBufferAsprintf(&buf, ",cap-ccf-assist=%s", str);
-    }
-
-    if (def->features[VIR_DOMAIN_FEATURE_CFPC] != VIR_DOMAIN_CFPC_NONE) {
-        const char *str = virDomainCFPCTypeToString(def->features[VIR_DOMAIN_FEATURE_CFPC]);
-        virBufferAsprintf(&buf, ",cap-cfpc=%s", str);
-    }
-
-    if (def->features[VIR_DOMAIN_FEATURE_SBBC] != VIR_DOMAIN_SBBC_NONE) {
-        const char *str = virDomainSBBCTypeToString(def->features[VIR_DOMAIN_FEATURE_SBBC]);
-        virBufferAsprintf(&buf, ",cap-sbbc=%s", str);
-    }
-
-    if (def->features[VIR_DOMAIN_FEATURE_IBS] != VIR_DOMAIN_IBS_NONE) {
-        const char *str = virDomainIBSTypeToString(def->features[VIR_DOMAIN_FEATURE_IBS]);
-        virBufferAsprintf(&buf, ",cap-ibs=%s", str);
-    }
-
     if (cpu && cpu->model &&
         cpu->mode == VIR_CPU_MODE_HOST_MODEL &&
         qemuDomainIsPSeries(def)) {

tests/qemuxml2argvdata/firmware-auto-efi-enrolled-keys.x86_64-latest.args

@@ -14,7 +14,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-fedora/.config \
 -blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
 -blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/fedora_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
 -blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
--machine pc-q35-4.0,usb=off,smm=on,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
+-machine pc-q35-4.0,usb=off,dump-guest-core=off,smm=on,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
 -accel kvm \
 -cpu qemu64 \
 -global driver=cfi.pflash01,property=secure,value=on \

tests/qemuxml2argvdata/firmware-auto-efi-loader-secure.x86_64-latest.args

@@ -14,7 +14,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-fedora/.config \
 -blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
 -blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/fedora_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
 -blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
--machine pc-q35-4.0,usb=off,smm=on,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
+-machine pc-q35-4.0,usb=off,dump-guest-core=off,smm=on,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
 -accel kvm \
 -cpu qemu64 \
 -global driver=cfi.pflash01,property=secure,value=on \

tests/qemuxml2argvdata/firmware-auto-efi-nvram.x86_64-latest.args

@@ -14,7 +14,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-fedora/.config \
 -blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
 -blockdev '{"driver":"file","filename":"/path/to/fedora_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
 -blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
--machine pc-q35-4.0,usb=off,smm=on,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
+-machine pc-q35-4.0,usb=off,dump-guest-core=off,smm=on,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
 -accel kvm \
 -cpu qemu64 \
 -global driver=cfi.pflash01,property=secure,value=on \

tests/qemuxml2argvdata/firmware-auto-efi-secboot.x86_64-latest.args

@@ -14,7 +14,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-fedora/.config \
 -blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
 -blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/fedora_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
 -blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
--machine pc-q35-4.0,usb=off,smm=on,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
+-machine pc-q35-4.0,usb=off,dump-guest-core=off,smm=on,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
 -accel kvm \
 -cpu qemu64 \
 -global driver=cfi.pflash01,property=secure,value=on \

tests/qemuxml2argvdata/firmware-auto-efi.x86_64-latest.args

@@ -14,7 +14,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-fedora/.config \
 -blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
 -blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/fedora_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
 -blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
--machine pc-q35-4.0,usb=off,smm=on,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
+-machine pc-q35-4.0,usb=off,dump-guest-core=off,smm=on,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
 -accel kvm \
 -cpu qemu64 \
 -global driver=cfi.pflash01,property=secure,value=on \

tests/qemuxml2argvdata/firmware-manual-efi-secure.args

@@ -11,7 +11,7 @@ QEMU_AUDIO_DRV=none \
 -name guest=test-bios,debug-threads=on \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-test-bios/master-key.aes \
--machine q35,usb=off,smm=on,dump-guest-core=off \
+-machine q35,usb=off,dump-guest-core=off,smm=on \
 -accel tcg \
 -global driver=cfi.pflash01,property=secure,value=on \
 -drive file=/usr/share/OVMF/OVMF_CODE.secboot.fd,if=pflash,format=raw,unit=0,readonly=on \

tests/qemuxml2argvdata/machine-smm-off.x86_64-latest.args

@@ -10,7 +10,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -name guest=QEMUGuest1,debug-threads=on \
 -S \
 -object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-QEMUGuest1/master-key.aes"}' \
--machine q35,usb=off,smm=off,dump-guest-core=off,memory-backend=pc.ram \
+-machine q35,usb=off,dump-guest-core=off,smm=off,memory-backend=pc.ram \
 -accel tcg \
 -cpu qemu64 \
 -m 214 \

tests/qemuxml2argvdata/machine-smm-on.x86_64-latest.args

@@ -10,7 +10,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -name guest=QEMUGuest1,debug-threads=on \
 -S \
 -object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-QEMUGuest1/master-key.aes"}' \
--machine q35,usb=off,smm=on,dump-guest-core=off,memory-backend=pc.ram \
+-machine q35,usb=off,dump-guest-core=off,smm=on,memory-backend=pc.ram \
 -accel tcg \
 -cpu qemu64 \
 -m 214 \

tests/qemuxml2argvdata/machine-vmport-opt.args

@@ -11,7 +11,7 @@ QEMU_AUDIO_DRV=none \
 -name guest=QEMUGuest1,debug-threads=on \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,usb=off,vmport=off,dump-guest-core=off \
+-machine pc,usb=off,dump-guest-core=off,vmport=off \
 -accel tcg \
 -m 214 \
 -overcommit mem-lock=off \

tests/qemuxml2argvdata/q35-virt-manager-basic.args

@@ -11,7 +11,7 @@ QEMU_AUDIO_DRV=spice \
 -name guest=virt-manager-basic,debug-threads=on \
 -S \
 -object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-virt-manager-basic/master-key.aes \
--machine q35,usb=off,vmport=off,dump-guest-core=off \
+-machine q35,usb=off,dump-guest-core=off,vmport=off \
 -accel kvm \
 -m 4096 \
 -overcommit mem-lock=off \

tests/qemuxml2argvdata/tseg-explicit-size.x86_64-latest.args

@@ -10,7 +10,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -name guest=QEMUGuest1,debug-threads=on \
 -S \
 -object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-QEMUGuest1/master-key.aes"}' \
--machine pc-q35-2.10,usb=off,smm=on,dump-guest-core=off,memory-backend=pc.ram \
+-machine pc-q35-2.10,usb=off,dump-guest-core=off,smm=on,memory-backend=pc.ram \
 -accel tcg \
 -global mch.extended-tseg-mbytes=48 \
 -cpu qemu64 \