* [PATCH docs] qm: document potential host cpu type drawback
@ 2026-07-15 13:01 Maximiliano Sandoval
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From: Maximiliano Sandoval @ 2026-07-15 13:01 UTC (permalink / raw)
To: pve-devel
Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
---
Notes:
This happened for example on Kernel 7.0.0 where the vmx-mbec is now enabled.
qm.adoc | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/qm.adoc b/qm.adoc
index 96ba68b..bca5792 100644
--- a/qm.adoc
+++ b/qm.adoc
@@ -482,6 +482,10 @@ cluster, choose the lowest compatible virtual QEMU CPU type.
NOTE: Live migrations between Intel and AMD host CPUs have no guarantee to work.
+WARNING: The 'host' CPU type can potentially enable new CPU features for the
+guest when the guest is restarted after a system upgrade. This can result in
+unexpected consequences.
+
See also
xref:chapter_qm_vcpu_list[List of AMD and Intel CPU Types as Defined in QEMU].
--
2.47.3
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2026-07-15 13:01 [PATCH docs] qm: document potential host cpu type drawback Maximiliano Sandoval
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