Linux memfd memory backend doesn't require any host setup, We prefer to
use it as the simplest memory XML adjustments to make virtiofs works.
Signed-off-by: Lin Ma <lma@xxxxxxxx>
---
virtinst/domcapabilities.py | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/virtinst/domcapabilities.py b/virtinst/domcapabilities.py
index 978deb85..6ed6e8ac 100644
--- a/virtinst/domcapabilities.py
+++ b/virtinst/domcapabilities.py
@@ -110,6 +110,10 @@ class _Features(_CapsBlock):
sev = XMLChildProperty(_SEV, is_single=True)
+class _MemoryBacking(_CapsBlock):
+ XML_NAME = "memoryBacking"
+
+
###############
# CPU classes #
###############
@@ -370,12 +374,20 @@ class DomainCapabilities(XMLBuilder):
types = self.devices.filesystem.get_enum("driverType").get_values()
return bool("virtiofs" in types)
+ def supports_memorybacking_memfd(self):
+ """
+ Return True if libvirt advertises support for memfd memory backend
+ """
+ sourceTypes = self.memorybacking.get_enum("sourceType").get_values()
+ return bool("memfd" in sourceTypes)
+
XML_NAME = "domainCapabilities"
os = XMLChildProperty(_OS, is_single=True)
cpu = XMLChildProperty(_CPU, is_single=True)
devices = XMLChildProperty(_Devices, is_single=True)
features = XMLChildProperty(_Features, is_single=True)
+ memorybacking = XMLChildProperty(_MemoryBacking, is_single=True)
arch = XMLProperty("./arch")
domain = XMLProperty("./domain")
--
2.26.2
