11:42 p.m.
This change adds qemu backend command line support for enabling or disabling
hotplug on the pci-root controller using the 'target' sub-element of the
pci-root controller as shown below:
<controller type='pci' model='pci-root'>
<target hotplug='off'/>
</controller>
'<target hotplug='off/on'/>' is only valid for pc (x86) machines and
turns on
the following command line option that is passed to qemu for x86 guests:
-global PIIX4_PM.acpi-root-pci-hotplug=<off/on>
This change also adds the required qemuxml2argv unit tests in order to test
correct qemu arguments. Unit tests have also been added to test qemu capability
validation checks.
Signed-off-by: Ani Sinha <ani(a)anisinha.ca>
---
src/qemu/qemu_command.c | 17 ++++++++++
.../pc-i440fx-acpi-root-hotplug-disable.args | 31 +++++++++++++++++++
.../pc-i440fx-acpi-root-hotplug-disable.err | 1 +
tests/qemuxml2argvtest.c | 3 ++
4 files changed, 52 insertions(+)
create mode 100644 tests/qemuxml2argvdata/pc-i440fx-acpi-root-hotplug-disable.args
create mode 100644 tests/qemuxml2argvdata/pc-i440fx-acpi-root-hotplug-disable.err
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index b60ee1192b..a8775bca24 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -2645,6 +2645,20 @@ qemuBuildSkipController(const virDomainControllerDef *controller,
return false;
}
+static int
+qemuBuildPMPCIRootHotplugCommandLine(virCommand *cmd,
+ const virDomainControllerDef *controller)
+{
+ if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
+ controller->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT &&
+ controller->idx == 0 &&
+ controller->opts.pciopts.hotplug != VIR_TRISTATE_SWITCH_ABSENT) {
+ virCommandAddArg(cmd, "-global");
+ virCommandAddArgFormat(cmd, "PIIX4_PM.acpi-root-pci-hotplug=%s",
+
virTristateSwitchTypeToString(controller->opts.pciopts.hotplug));
+ }
+ return 0;
+}
static int
qemuBuildControllersByTypeCommandLine(virCommand *cmd,
@@ -2661,6 +2675,9 @@ qemuBuildControllersByTypeCommandLine(virCommand *cmd,
if (cont->type != type)
continue;
+ if (qemuBuildPMPCIRootHotplugCommandLine(cmd, cont))
+ continue;
+
if (qemuBuildSkipController(cont, def))
continue;
diff --git a/tests/qemuxml2argvdata/pc-i440fx-acpi-root-hotplug-disable.args
b/tests/qemuxml2argvdata/pc-i440fx-acpi-root-hotplug-disable.args
new file mode 100644
index 0000000000..dd8ea503fc
--- /dev/null
+++ b/tests/qemuxml2argvdata/pc-i440fx-acpi-root-hotplug-disable.args
@@ -0,0 +1,31 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-i440fx \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-i440fx/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-i440fx/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-i440fx/.config \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name guest=i440fx,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-i440fx/master-key.aes \
+-machine pc-i440fx-2.5,accel=tcg,usb=off,dump-guest-core=off \
+-m 1024 \
+-realtime mlock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 56f5055c-1b8d-490c-844a-ad646a1caaaa \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev
socket,id=charmonitor,path=/tmp/lib/domain--1-i440fx/monitor.sock,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-global PIIX4_PM.acpi-root-pci-hotplug=off \
+-usb \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/pc-i440fx-acpi-root-hotplug-disable.err
b/tests/qemuxml2argvdata/pc-i440fx-acpi-root-hotplug-disable.err
new file mode 100644
index 0000000000..827c93a7ba
--- /dev/null
+++ b/tests/qemuxml2argvdata/pc-i440fx-acpi-root-hotplug-disable.err
@@ -0,0 +1 @@
+unsupported configuration: setting the hotplug property on a pci-root device is not
supported by this QEMU binary
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 13e387df3f..d5ddd60182 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -2571,6 +2571,9 @@ mymain(void)
QEMU_CAPS_DEVICE_IOH3420,
QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE, QEMU_CAPS_ICH9_AHCI,
QEMU_CAPS_PIIX_DISABLE_S3, QEMU_CAPS_PIIX_DISABLE_S4);
+ DO_TEST("pc-i440fx-acpi-root-hotplug-disable",
+ QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG);
+ DO_TEST_PARSE_ERROR_NOCAPS("pc-i440fx-acpi-root-hotplug-disable");
DO_TEST("q35-usb2",
QEMU_CAPS_DEVICE_PCI_BRIDGE,
QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
--
2.25.1