aboutsummaryrefslogtreecommitdiff
path: root/qemu-options.hx
diff options
context:
space:
mode:
authorXiao Feng Ren <renxiaof@linux.vnet.ibm.com>2017-05-17 02:48:03 +0200
committerCornelia Huck <cornelia.huck@de.ibm.com>2017-05-19 12:29:01 +0200
commit274250c30158f60aefb46088a7bb0d711061226c (patch)
tree84cc4a0e08cc397588a7610468a58d5a66d98d7a /qemu-options.hx
parent74c98e20a604b9db58284b8727688df70e9bf643 (diff)
s390x/css: add s390-squash-mcss machine option
We want to support real (i.e. not virtual) channel devices even for guests that do not support MCSS-E (where guests may see devices from any channel subsystem image at once). As all virtio-ccw devices are in css 0xfe (and show up in the default css 0 for guests not activating MCSS-E), we need an option to squash both the virtio subchannels and e.g. passed-through subchannels from their real css (0-3, or 0 for hosts not activating MCSS-E) into the default css. This will be exploited in a later patch. Signed-off-by: Xiao Feng Ren <renxiaof@linux.vnet.ibm.com> Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Message-Id: <20170517004813.58227-4-bjsdjshi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'qemu-options.hx')
-rw-r--r--qemu-options.hx6
1 files changed, 5 insertions, 1 deletions
diff --git a/qemu-options.hx b/qemu-options.hx
index f07a310eb1..1e5382c1e1 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -42,7 +42,8 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
" dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n"
" suppress-vmdesc=on|off disables self-describing migration (default=off)\n"
" nvdimm=on|off controls NVDIMM support (default=off)\n"
- " enforce-config-section=on|off enforce configuration section migration (default=off)\n",
+ " enforce-config-section=on|off enforce configuration section migration (default=off)\n"
+ " s390-squash-mcss=on|off controls support for squashing into default css (default=off)\n",
QEMU_ARCH_ALL)
STEXI
@item -machine [type=]@var{name}[,prop=@var{value}[,...]]
@@ -81,6 +82,9 @@ controls whether DEA wrapping keys will be created to allow
execution of DEA cryptographic functions. The default is on.
@item nvdimm=on|off
Enables or disables NVDIMM support. The default is off.
+@item s390-squash-mcss=on|off
+Enables or disables squashing subchannels into the default css.
+The default is off.
@end table
ETEXI