[PATCH v3 2/5] qemu: capablities: detect presence of acpi-root-pci-hotplug for i440fx machines

[Ani Sinha]

The following change in qemu added support for a global boolean flag specific
to i440fx machines that would turn off or on acpi based hotplug for pci root
bus:

3d7e78aa7777f ("Introduce a new flag for i440fx to disable PCI hotplug on the root bus")

The option is passed as "-global PIIX4_PM.acpi-root-pci-hotplug=on" etc in qemu
commandline. It is enabled by default. This patch adds the corresponding qemu
capabilities in libvirt as QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG.

Please note that the test specific qemu capabilities .replies files has already
been updated as a part of regular refreshing them when a new qemu version is
released. Hence, no updates to those files are required.

Signed-off-by: Ani Sinha <ani at anisinha.ca>
---
 src/qemu/qemu_capabilities.c                     | 2 ++
 src/qemu/qemu_capabilities.h                     | 1 +
 tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml | 1 +
 tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml | 1 +
 tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml | 1 +
 5 files changed, 6 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index c954e42382..706169a5cf 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -642,6 +642,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
 
               /* 410 */
               "ich9-acpi-hotplug-bridge", /* QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE */
+              "piix4-acpi-root-hotplug-en", /* QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG */
     );
 
 
@@ -1470,6 +1471,7 @@ static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsPiix4PM[] = {
     { "disable_s3", QEMU_CAPS_PIIX_DISABLE_S3, NULL },
     { "disable_s4", QEMU_CAPS_PIIX_DISABLE_S4, NULL },
     { "acpi-pci-hotplug-with-bridge-support", QEMU_CAPS_PIIX_ACPI_HOTPLUG_BRIDGE, NULL },
+    { "acpi-root-pci-hotplug", QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG, NULL },
 };
 
 static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsUSBRedir[] = {
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index f53009b6e9..b0f9559d95 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -622,6 +622,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
 
     /* 410 */
     QEMU_CAPS_ICH9_ACPI_HOTPLUG_BRIDGE, /* -M q35 ICH9-LPC.acpi-pci-hotplug-with-bridge-support */
+    QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG, /* -M pc PIIX4_PM.acpi-root-pci-hotplug */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml
index 126bae2401..da52eda200 100644
--- a/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_5.2.0.x86_64.xml
@@ -247,6 +247,7 @@
   <flag name='input-linux'/>
   <flag name='query-display-options'/>
   <flag name='piix4-acpi-hotplug-bridge'/>
+  <flag name='piix4-acpi-root-hotplug-en'/>
   <version>5002000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>43100243</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml
index b01db2dfbe..d75760f1f8 100644
--- a/tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.0.0.x86_64.xml
@@ -255,6 +255,7 @@
   <flag name='query-display-options'/>
   <flag name='set-action'/>
   <flag name='piix4-acpi-hotplug-bridge'/>
+  <flag name='piix4-acpi-root-hotplug-en'/>
   <version>6000000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>43100242</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
index b136853aba..8fd3c51f4e 100644
--- a/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_6.1.0.x86_64.xml
@@ -258,6 +258,7 @@
   <flag name='set-action'/>
   <flag name='piix4-acpi-hotplug-bridge'/>
   <flag name='ich9-acpi-hotplug-bridge'/>
+  <flag name='piix4-acpi-root-hotplug-en'/>
   <version>6001000</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>43100243</microcodeVersion>
-- 
2.25.1