[libvirt] [PATCH v2 1/2] qemu: add panic device support for S390
Boris Fiuczynski
fiuczy at linux.vnet.ibm.com
Thu Apr 14 14:05:44 UTC 2016
If a panic device is being defined without a model in a domain
the default value is always overwritten with model ISA. An ISA
bus does not exist on S390 and therefore specifying a panic device
results in an unsupported configuration.
Since the S390 architecture inherently provides a crash detection
capability the panic device should be defined in the domain xml.
This patch addes an s390 panic device model, prevents setting a
device address and by default adds a panic device for S390 guests.
Signed-off-by: Boris Fiuczynski <fiuczy at linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck at de.ibm.com>
---
docs/formatdomain.html.in | 7 ++++++-
docs/schemas/domaincommon.rng | 1 +
src/conf/domain_conf.c | 3 ++-
src/conf/domain_conf.h | 1 +
src/qemu/qemu_command.c | 21 ++++++++++++++++++++-
src/qemu/qemu_domain.c | 9 ++++++++-
6 files changed, 38 insertions(+), 4 deletions(-)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index c2955eb..10c27fb 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -6242,6 +6242,9 @@ qemu-kvm -net nic,model=? /dev/null
For pSeries guests, this feature is always enabled since it's
implemented by the guest firmware, thus libvirt automatically
adds the <code>panic</code> element to the domain XML.
+ For S390 guests, this feature is always enabled since it's an
+ integral part of the S390 architecture, thus libvirt automatically
+ adds the <code>panic</code> element to the domain XML.
</p>
<p>
Example: usage of panic configuration
@@ -6269,6 +6272,8 @@ qemu-kvm -net nic,model=? /dev/null
<li>'pseries' — default and valid only for pSeries guests.</li>
<li>'hyperv' — for Hyper-V crash CPU feature.
<span class="since">Since 1.3.0, QEMU and KVM only</span></li>
+ <li>'s390' — default for S390 guests.
+ <span class="since">Since 1.3.4</span></li>
</ul>
</dd>
<dt><code>address</code></dt>
@@ -6276,7 +6281,7 @@ qemu-kvm -net nic,model=? /dev/null
<p>
address of panic. The default ioport is 0x505. Most users
don't need to specify an address, and doing so is forbidden
- altogether for pseries and hyperv models.
+ altogether for s390, pseries and hyperv models.
</p>
</dd>
</dl>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index fa54526..03ca4fe 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -5507,6 +5507,7 @@
<value>isa</value>
<value>pseries</value>
<value>hyperv</value>
+ <value>s390</value>
</choice>
</attribute>
</optional>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 446fbc5..a6b2b90 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -521,7 +521,8 @@ VIR_ENUM_IMPL(virDomainPanicModel, VIR_DOMAIN_PANIC_MODEL_LAST,
"default",
"isa",
"pseries",
- "hyperv")
+ "hyperv",
+ "s390")
VIR_ENUM_IMPL(virDomainVideo, VIR_DOMAIN_VIDEO_TYPE_LAST,
"vga",
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 443a1d7..936bea1 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2072,6 +2072,7 @@ typedef enum {
VIR_DOMAIN_PANIC_MODEL_ISA,
VIR_DOMAIN_PANIC_MODEL_PSERIES,
VIR_DOMAIN_PANIC_MODEL_HYPERV,
+ VIR_DOMAIN_PANIC_MODEL_S390,
VIR_DOMAIN_PANIC_MODEL_LAST
} virDomainPanicModel;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index da99e5c..028a469 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -8991,6 +8991,25 @@ qemuBuildPanicCommandLine(virCommandPtr cmd,
for (i = 0; i < def->npanics; i++) {
switch ((virDomainPanicModel) def->panics[i]->model) {
+ case VIR_DOMAIN_PANIC_MODEL_S390:
+ /* For s390 guests, the hardware provides the same
+ * functionality as the pvpanic device. The address
+ * cannot be configured by the user */
+ if (!ARCH_IS_S390(def->os.arch)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("only S390 guests support "
+ "panic device of model 's390'"));
+ return -1;
+ }
+ if (def->panics[i]->info.type !=
+ VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("setting the panic device address is not "
+ "supported for model 's390'"));
+ return -1;
+ }
+ break;
+
case VIR_DOMAIN_PANIC_MODEL_HYPERV:
/* Panic with model 'hyperv' is not a device, it should
* be configured in cpu commandline. The address
@@ -9034,7 +9053,7 @@ qemuBuildPanicCommandLine(virCommandPtr cmd,
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_PANIC)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("the QEMU binary does not support the "
- "panic device"));
+ "ISA panic device"));
return -1;
}
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 5d54fff..a83b43c 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1505,9 +1505,11 @@ qemuDomainDefAddDefaultDevices(virDomainDefPtr def,
break;
case VIR_ARCH_S390:
addDefaultUSB = false;
+ addPanicDevice = true;
break;
case VIR_ARCH_S390X:
addDefaultUSB = false;
+ addPanicDevice = true;
break;
case VIR_ARCH_SPARC:
@@ -1586,7 +1588,10 @@ qemuDomainDefAddDefaultDevices(virDomainDefPtr def,
size_t j;
for (j = 0; j < def->npanics; j++) {
if (def->panics[j]->model == VIR_DOMAIN_PANIC_MODEL_DEFAULT ||
- def->panics[j]->model == VIR_DOMAIN_PANIC_MODEL_PSERIES)
+ (ARCH_IS_PPC64(def->os.arch) &&
+ def->panics[j]->model == VIR_DOMAIN_PANIC_MODEL_PSERIES) ||
+ (ARCH_IS_S390(def->os.arch) &&
+ def->panics[j]->model == VIR_DOMAIN_PANIC_MODEL_S390))
break;
}
@@ -1883,6 +1888,8 @@ qemuDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
if (ARCH_IS_PPC64(def->os.arch) &&
STRPREFIX(def->os.machine, "pseries"))
dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_PSERIES;
+ else if (ARCH_IS_S390(def->os.arch))
+ dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_S390;
else
dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_ISA;
}
--
2.3.0
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