[PATCH v7 3/4] qemu: command: add support for acpi-bridge-hotplug feature
Ani Sinha
ani at anisinha.ca
Fri Oct 8 06:42:14 UTC 2021
This change adds backend qemu command line support for new libvirt global
feature 'acpi-bridge-hotplug'. This option can be used as following:
<feature>
<pci>
<acpi-bridge-hotplug state='off|on'/>
</pci>
</feature>
The '<pci>' sub-element under '<feature>' is also newly introduced.
'acpi-bridge-hotplug' turns on the following command line option to qemu for
x86 guests:
(pc machines): -global PIIX4_PM.acpi-pci-hotplug-with-bridge-support=<off|on>
(q35 machines): -global ICH9-LPC.acpi-pci-hotplug-with-bridge-support=<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 as well as checks for using this option with the right
architecture.
Signed-off-by: Ani Sinha <ani at anisinha.ca>
---
src/qemu/qemu_command.c | 20 +++++++++++
.../aarch64-acpi-hotplug-bridge-disable.err | 1 +
...pc-i440fx-acpi-hotplug-bridge-disable.args | 31 +++++++++++++++++
.../pc-i440fx-acpi-hotplug-bridge-disable.err | 1 +
.../q35-acpi-hotplug-bridge-disable.args | 33 +++++++++++++++++++
.../q35-acpi-hotplug-bridge-disable.err | 1 +
tests/qemuxml2argvtest.c | 16 +++++++++
7 files changed, 103 insertions(+)
create mode 100644 tests/qemuxml2argvdata/aarch64-acpi-hotplug-bridge-disable.err
create mode 100644 tests/qemuxml2argvdata/pc-i440fx-acpi-hotplug-bridge-disable.args
create mode 100644 tests/qemuxml2argvdata/pc-i440fx-acpi-hotplug-bridge-disable.err
create mode 100644 tests/qemuxml2argvdata/q35-acpi-hotplug-bridge-disable.args
create mode 100644 tests/qemuxml2argvdata/q35-acpi-hotplug-bridge-disable.err
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 28bca1519c..f45be80744 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6102,6 +6102,7 @@ qemuBuildPMCommandLine(virCommand *cmd,
qemuDomainObjPrivate *priv)
{
virQEMUCaps *qemuCaps = priv->qemuCaps;
+ int acpihp_br = def->pci_features[VIR_DOMAIN_PCI_ACPI_BRIDGE_HOTPLUG];
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_SET_ACTION)) {
/* with new qemu we always want '-no-shutdown' on startup and we set
@@ -6147,6 +6148,25 @@ qemuBuildPMCommandLine(virCommand *cmd,
pm_object, def->pm.s4 == VIR_TRISTATE_BOOL_NO);
}
+ if (acpihp_br) {
+ const char *pm_object = NULL;
+
+ if (!qemuDomainIsQ35(def) &&
+ virQEMUCapsGet(qemuCaps, QEMU_CAPS_PIIX4_ACPI_HOTPLUG_BRIDGE))
+ pm_object = "PIIX4_PM";
+
+ if (qemuDomainIsQ35(def) &&
+ virQEMUCapsGet(qemuCaps, QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE))
+ pm_object = "ICH9-LPC";
+
+ if (pm_object != NULL) {
+ virCommandAddArg(cmd, "-global");
+ virCommandAddArgFormat(cmd, "%s.acpi-pci-hotplug-with-bridge-support=%s",
+ pm_object,
+ virTristateSwitchTypeToString(acpihp_br));
+ }
+ }
+
return 0;
}
diff --git a/tests/qemuxml2argvdata/aarch64-acpi-hotplug-bridge-disable.err b/tests/qemuxml2argvdata/aarch64-acpi-hotplug-bridge-disable.err
new file mode 100644
index 0000000000..9f0a88b826
--- /dev/null
+++ b/tests/qemuxml2argvdata/aarch64-acpi-hotplug-bridge-disable.err
@@ -0,0 +1 @@
+unsupported configuration: acpi-bridge-hotplug is not available for architecture 'aarch64'
diff --git a/tests/qemuxml2argvdata/pc-i440fx-acpi-hotplug-bridge-disable.args b/tests/qemuxml2argvdata/pc-i440fx-acpi-hotplug-bridge-disable.args
new file mode 100644
index 0000000000..a1e5dc85c7
--- /dev/null
+++ b/tests/qemuxml2argvdata/pc-i440fx-acpi-hotplug-bridge-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 \
+-global PIIX4_PM.acpi-pci-hotplug-with-bridge-support=off \
+-boot strict=on \
+-usb \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/pc-i440fx-acpi-hotplug-bridge-disable.err b/tests/qemuxml2argvdata/pc-i440fx-acpi-hotplug-bridge-disable.err
new file mode 100644
index 0000000000..8c09a3cd76
--- /dev/null
+++ b/tests/qemuxml2argvdata/pc-i440fx-acpi-hotplug-bridge-disable.err
@@ -0,0 +1 @@
+unsupported configuration: acpi-bridge-hotplug is not available with this QEMU binary
diff --git a/tests/qemuxml2argvdata/q35-acpi-hotplug-bridge-disable.args b/tests/qemuxml2argvdata/q35-acpi-hotplug-bridge-disable.args
new file mode 100644
index 0000000000..007c22c646
--- /dev/null
+++ b/tests/qemuxml2argvdata/q35-acpi-hotplug-bridge-disable.args
@@ -0,0 +1,33 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-q35 \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-q35/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-q35/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-q35/.config \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-x86_64 \
+-name guest=q35,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-q35/master-key.aes \
+-machine pc-q35-2.5,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-q35/monitor.sock,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-global ICH9-LPC.acpi-pci-hotplug-with-bridge-support=off \
+-boot strict=on \
+-device i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1e \
+-device pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x0 \
+-device ioh3420,port=0x8,chassis=3,id=pci.3,bus=pcie.0,addr=0x1 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.2,addr=0x1 \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/q35-acpi-hotplug-bridge-disable.err b/tests/qemuxml2argvdata/q35-acpi-hotplug-bridge-disable.err
new file mode 100644
index 0000000000..8c09a3cd76
--- /dev/null
+++ b/tests/qemuxml2argvdata/q35-acpi-hotplug-bridge-disable.err
@@ -0,0 +1 @@
+unsupported configuration: acpi-bridge-hotplug is not available with this QEMU binary
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 7df3946751..116ba714eb 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -2562,6 +2562,22 @@ mymain(void)
DO_TEST("pc-i440fx-acpi-root-hotplug-disable",
QEMU_CAPS_PIIX4_ACPI_ROOT_PCI_HOTPLUG);
DO_TEST_PARSE_ERROR_NOCAPS("pc-i440fx-acpi-root-hotplug-disable");
+ DO_TEST("q35-acpi-hotplug-bridge-disable",
+ QEMU_CAPS_DEVICE_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_IOH3420,
+ QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE, QEMU_CAPS_ICH9_AHCI,
+ QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE);
+ DO_TEST("pc-i440fx-acpi-hotplug-bridge-disable",
+ QEMU_CAPS_DEVICE_PCI_BRIDGE,
+ QEMU_CAPS_DEVICE_IOH3420,
+ QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
+ QEMU_CAPS_PIIX4_ACPI_HOTPLUG_BRIDGE);
+ DO_TEST_PARSE_ERROR_NOCAPS("q35-acpi-hotplug-bridge-disable");
+ DO_TEST_PARSE_ERROR_NOCAPS("pc-i440fx-acpi-hotplug-bridge-disable");
+ /* verify that we fail when acpi-bridge-hotplug option is specified for
+ * archs other than x86
+ */
+ DO_TEST_PARSE_ERROR_NOCAPS("aarch64-acpi-hotplug-bridge-disable");
DO_TEST("q35-usb2",
QEMU_CAPS_DEVICE_PCI_BRIDGE,
QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
--
2.25.1
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