summaryrefslogtreecommitdiff
path: root/include/asm-s390
diff options
context:
space:
mode:
authorCarsten Otte <cotte@de.ibm.com>2008-03-25 20:47:44 +0300
committerAvi Kivity <avi@qumranet.com>2008-04-27 13:00:50 +0400
commitfa5877439d5a062d91c3abd5a690483bbdb4268e (patch)
tree0bd9c1794134d891678e3602ba78a6facec39d78 /include/asm-s390
parent85f8fffe3c2ab13f13526c46b5471fc22e98ccfe (diff)
downloadlinux-fa5877439d5a062d91c3abd5a690483bbdb4268e.tar.xz
s390: KVM guest: detect when running on kvm
This patch adds functionality to detect if the kernel runs under the KVM hypervisor. A macro MACHINE_IS_KVM is exported for device drivers. This allows drivers to skip device detection if the systems runs non-virtualized. We also define a preferred console to avoid having the ttyS0, which is a line mode only console. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/asm-s390')
-rw-r--r--include/asm-s390/setup.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index a76a6b8fd887..aaf4b518b940 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -62,6 +62,7 @@ extern unsigned long machine_flags;
#define MACHINE_IS_VM (machine_flags & 1)
#define MACHINE_IS_P390 (machine_flags & 4)
#define MACHINE_HAS_MVPG (machine_flags & 16)
+#define MACHINE_IS_KVM (machine_flags & 64)
#define MACHINE_HAS_IDTE (machine_flags & 128)
#define MACHINE_HAS_DIAG9C (machine_flags & 256)