[PATCH] qemu: Add check for needed paths for memory devices

[Kristina Hanicova]

When building a commandline for a DIMM memory device with
non-default access mode, the qemuBuildMemoryBackendProps() will
tell QEMU to allocate memory from per-domain memory backing dir.
But later, when preparing the host, the
qemuProcessNeedMemoryBackingPath() does not check for memory
devices at all resulting in per-domain memory backing dir not
being created which upsets QEMU.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1961114

Signed-off-by: Kristina Hanicova <khanicov at redhat.com>
---
 src/qemu/qemu_process.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index b69a9d1927..35213f81ec 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -3938,6 +3938,11 @@ qemuProcessNeedMemoryBackingPath(virDomainDef *def,
             return true;
     }
 
+    for (i = 0; i < def->nmems; i++) {
+        if (def->mems[i]->access != VIR_DOMAIN_MEMORY_ACCESS_DEFAULT)
+            return true;
+    }
+
     if (mem) {
         switch (mem->model) {
         case VIR_DOMAIN_MEMORY_MODEL_DIMM:
-- 
2.31.1