[libvirt] [RFC] cpu_map: Remove pconfig from Icelake-Server CPU model

[Eduardo Habkost]

The pconfig feature never worked, and adding "pconfig=off" to the
QEMU command-line triggers a regression in QEMU 3.1.1 and 4.0.0.

Signed-off-by: Eduardo Habkost <ehabkost at redhat.com>
---
I'm sending this as an RFC because I couldn't test it properly,
and because I don't know what are the consequences of changing
cpu_map between libvirt versions.
---
 src/cpu_map/x86_Icelake-Server.xml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/cpu_map/x86_Icelake-Server.xml b/src/cpu_map/x86_Icelake-Server.xml
index fb15977a59..188a781282 100644
--- a/src/cpu_map/x86_Icelake-Server.xml
+++ b/src/cpu_map/x86_Icelake-Server.xml
@@ -56,7 +56,9 @@
     <feature name='pat'/>
     <feature name='pcid'/>
     <feature name='pclmuldq'/>
-    <feature name='pconfig'/>
+    <!-- 'pconfig' was added by accident in QEMU 3.1.0 but never worked.
+         It was removed in QEMU 3.1.1 and 4.0.0.  See QEMU commits
+         76e5a4d58357 and 712f807e1965 for details -->
     <feature name='pdpe1gb'/>
     <feature name='pge'/>
     <feature name='pku'/>
-- 
2.21.0