qemuDomainDefEnableDefaultFeatures() has this comment:
/* We want to use the highest available GIC version for guests;
* however, the emulated GICv3 is currently lacking a MSI
controller,
* making it unsuitable for the pure PCIe topology we aim for.
*
* For that reason, we skip this step entirely for TCG guests,
* and rely on the code below to pick the default version, GICv2,
* which supports all the features we need.
*
* See https://bugzilla.redhat.com/show_bug.cgi?id=1414081 */
The referenced bug dates back to 2017. Is this still valid?
** Bug watch added: Red Hat Bugzilla #1414081
https://bugzilla.redhat.com/show_bug.cgi?id=1414081
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https://bugs.launchpad.net/bugs/2114959
Title:
Creating a 16 core arm64 virtual machine fails
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