8:23 a.m.
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 adds an s390 panic device model and prevents setting a
device address on it.
Signed-off-by: Boris Fiuczynski <fiuczy(a)linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck(a)de.ibm.com>
---
docs/formatdomain.html.in | 16 ++++++++++++----
docs/schemas/domaincommon.rng | 1 +
src/conf/domain_conf.c | 3 ++-
src/conf/domain_conf.h | 1 +
src/qemu/qemu_command.c | 19 +++++++++++++++++++
src/qemu/qemu_domain.c | 2 ++
6 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index d2db53b..81f4d48 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -6365,9 +6365,15 @@ qemu-kvm -net nic,model=? /dev/null
<span class="since">Since 1.2.1, QEMU and KVM only</span>
</p>
<p>
- 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.
+ This feature is always enabled for:
+ </p>
+ <ul>
+ <li>pSeries guests since it's implemented by the guest
firmware.</li>
+ <li>S390 guest since it's an integral part of the S390
architecture.</li>
+ </ul>
+ <p>
+ Thus libvirt automatically adds the <code>panic</code> element to the
+ domain XML.
</p>
<p>
Example: usage of panic configuration
@@ -6395,6 +6401,8 @@ 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 1.3.5</span></li>
</ul>
</dd>
<dt><code>address</code></dt>
@@ -6402,7 +6410,7 @@ 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 f77bbcf..ce4f551 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -5523,6 +5523,7 @@
<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 d8bed67..b99c00c 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -525,7 +525,8 @@ 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 31e7a86..ce40aa8 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2082,6 +2082,7 @@ 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 6fbfe21..05071f0 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -9046,6 +9046,25 @@ 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
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 6262bfe..6897fe0 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1909,6 +1909,8 @@ 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