From 4b41b0d24b5efe70a5d6a39ff7b1f6571a7315b5 Mon Sep 17 00:00:00 2001
From: Thomas Blume <Thomas.Blume@suse.com>
Date: Fri, 18 Jul 2014 09:13:36 -0400
Subject: [PATCH] systemd-detect-virt: detect s390 virtualization
A system that is running on a logical partition (LPAR) provided by
PR/SM has access to physical hardware (except CPU). It is true that
PR/SM abstracts the hardware, but only for sharing purposes.
Details are statet at:
http://publib.boulder.ibm.com/infocenter/eserver/v1r2/topic/eicaz/eicazzlpar.htm
-->--
In other words, PR/SM transforms physical resources into virtual resources so
that many logical partitions can share the same physical resources.
--<--
Still, from the OS point of view, the shared virtual resource is real
hardware. ConditionVirtualization must be set to false if the OS runs
directly on PR/SM (e.g. in an LPAR).
[zj: reorder code so that variables are not allocated when #if-def is
false. Add commit message.]
(cherry picked from commit f41925b4e442a34c93ad120ef1426c974a047ed1)
---
man/systemd.unit.xml | 1 +
src/shared/virt.c | 17 +++++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index f66c580a37..e66be4ee51 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -995,6 +995,7 @@
virtualization solution, or one of
<varname>qemu</varname>,
<varname>kvm</varname>,
+ <varname>zvm</varname>,
<varname>vmware</varname>,
<varname>microsoft</varname>,
<varname>oracle</varname>,
diff --git a/src/shared/virt.c b/src/shared/virt.c
index 20a8d7c5bf..b4368952ff 100644
--- a/src/shared/virt.c
+++ b/src/shared/virt.c
@@ -220,6 +220,23 @@ int detect_vm(const char **id) {
goto finish;
}
+#if defined(__s390__)
+ {
+ _cleanup_free_ char *t = NULL;
+
+ r = get_status_field("/proc/sysinfo", "VM00 Control Program:", &t);
+ if (r >= 0) {
+ if (streq(t, "z/VM"))
+ _id = "zvm";
+ else
+ _id = "kvm";
+ r = 1;
+
+ goto finish;
+ }
+ }
+#endif
+
r = 0;
finish: