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[Qemu-devel] [PATCH v2 2/2] s390x: deprecate s390-squash-mcss machine pr
From: |
Halil Pasic |
Subject: |
[Qemu-devel] [PATCH v2 2/2] s390x: deprecate s390-squash-mcss machine prop |
Date: |
Wed, 6 Dec 2017 15:44:38 +0100 |
With the cssids unrestricted (commit "s390x/css: unrestrict cssids") the
s390-squash-mcss machine property should not be used. Actually Libvirt
never supported this, so the expectation is that removing it should be
pretty painless. But let's play nice and deprecate it first.
Signed-off-by: Halil Pasic <address@hidden>
---
v1 -> v2:
* Moved warning to machine initialization, and made it
warn if the command line option is specified
* Dropped the r-b of Dong Jia because of the change above
* Dropped machine name from the doc
---
hw/s390x/s390-virtio-ccw.c | 7 ++++++-
qemu-doc.texi | 8 ++++++++
qemu-options.hx | 8 +++++++-
3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 4d65a50334..91e12f3af9 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -308,6 +308,11 @@ static void ccw_init(MachineState *machine)
} else {
ret = css_create_css_image(VIRTUAL_CSSID, true);
}
+ if (qemu_opt_get(qemu_get_machine_opts(), "s390-squash-mcss")) {
+ warn_report("The machine property 's390-squash-mcss' is deprecated"
+ " (obsoleted by lifting the cssid restrictions).");
+ }
+
assert(ret == 0);
if (css_migration_enabled()) {
css_register_vmstate();
@@ -582,7 +587,7 @@ static inline void s390_machine_initfn(Object *obj)
object_property_add_bool(obj, "s390-squash-mcss",
machine_get_squash_mcss,
machine_set_squash_mcss, NULL);
- object_property_set_description(obj, "s390-squash-mcss",
+ object_property_set_description(obj, "s390-squash-mcss", "(deprecated) "
"enable/disable squashing subchannels into the default css",
NULL);
object_property_set_bool(obj, false, "s390-squash-mcss", NULL);
diff --git a/qemu-doc.texi b/qemu-doc.texi
index db2351c746..60d35f996a 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -2501,6 +2501,14 @@ enabled via the ``-machine usb=on'' argument.
The ``-nodefconfig`` argument is a synonym for ``-no-user-config``.
address@hidden -machine s390-squash-mcss=on|off (since 2.12.0)
+
+The ``s390-squash-mcss=on`` property has been obsoleted by allowing the
+cssid to be chosen freely. Instead of squashing subchannels into the
+default channel subsystem image for guests that do not support multiple
+channel subsystems, all devices can be put into the default channel
+subsystem image.
+
@section qemu-img command line arguments
@subsection convert -s (since 2.0.0)
diff --git a/qemu-options.hx b/qemu-options.hx
index f11c4ac960..fe0c29271f 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -43,7 +43,7 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
" 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"
- " s390-squash-mcss=on|off controls support for squashing
into default css (default=off)\n",
+ " s390-squash-mcss=on|off (deprecated) controls support for
squashing into default css (default=off)\n",
QEMU_ARCH_ALL)
STEXI
@item -machine address@hidden,address@hidden,...]]
@@ -98,6 +98,12 @@ 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.
+NOTE: This property is deprecated and will be removed in future releases.
+The ``s390-squash-mcss=on`` property has been obsoleted by allowing the
+cssid to be chosen freely. Instead of squashing subchannels into the
+default channel subsystem image for guests that do not support multiple
+channel subsystems, all devices can be put into the default channel
+subsystem image.
@item enforce-config-section=on|off
If @option{enforce-config-section} is set to @var{on}, force migration
code to send configuration section even if the machine-type sets the
--
2.13.5