[libvirt] [PATCH 5/7] conf: Parse and format HPT maxpagesize
Andrea Bolognani
abologna at redhat.com
Mon Jun 25 17:11:59 UTC 2018
Signed-off-by: Andrea Bolognani <abologna at redhat.com>
---
docs/formatdomain.html.in | 11 ++++--
docs/schemas/domaincommon.rng | 21 +++++++----
src/conf/domain_conf.c | 36 ++++++++++++++++---
src/conf/domain_conf.h | 1 +
tests/qemuxml2argvdata/pseries-features.xml | 4 ++-
tests/qemuxml2argvtest.c | 1 +
tests/qemuxml2xmloutdata/pseries-features.xml | 4 ++-
tests/qemuxml2xmltest.c | 1 +
8 files changed, 63 insertions(+), 16 deletions(-)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 89672a0486..1cf92cd755 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1922,7 +1922,9 @@
<pvspinlock state='on'/>
<gic version='2'/>
<ioapic driver='qemu'/>
- <hpt resizing='required'/>
+ <hpt resizing='required'>
+ <maxpagesize unit='MiB'>16</maxpagesize>
+ </hpt>
<vmcoreinfo state='on'/>
<smm state='on'>
<tseg unit='MiB'>48</tseg>
@@ -2149,7 +2151,12 @@
support; and <code>required</code>, which prevents the guest from
starting unless both the guest and the host support HPT resizing. If
the attribute is not defined, the hypervisor default will be used.
- <span class="since">Since 3.10.0</span> (QEMU/KVM only)
+ <span class="since">Since 3.10.0</span> (QEMU/KVM only).
+
+ <p>The optional <code>maxpagesize</code> subelement can be used to
+ limit the usable page size for HPT guests. Common values are 64 KiB,
+ 16 MiB and 16 GiB; when not specified, the hypervisor default will
+ be used. <span class="since">Since 4.5.0</span> (QEMU/KVM only).</p>
</dd>
<dt><code>vmcoreinfo</code></dt>
<dd>Enable QEMU vmcoreinfo device to let the guest kernel save debug
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 4a454dddb4..0a661cf1e7 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -5121,13 +5121,20 @@
<define name="hpt">
<element name="hpt">
- <attribute name="resizing">
- <choice>
- <value>enabled</value>
- <value>disabled</value>
- <value>required</value>
- </choice>
- </attribute>
+ <optional>
+ <attribute name="resizing">
+ <choice>
+ <value>enabled</value>
+ <value>disabled</value>
+ <value>required</value>
+ </choice>
+ </attribute>
+ </optional>
+ <optional>
+ <element name="maxpagesize">
+ <ref name='scaledInteger'/>
+ </element>
+ </optional>
</element>
</define>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 3f7b0d1bfe..d8cb7f37f3 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -19807,8 +19807,24 @@ virDomainDefParseXML(xmlDocPtr xml,
VIR_FREE(tmp);
}
- if (def->hpt_resizing != VIR_DOMAIN_HPT_RESIZING_NONE)
+ if (virDomainParseScaledValue("./features/hpt/maxpagesize",
+ NULL,
+ ctxt,
+ &def->hpt_maxpagesize,
+ 1024,
+ ULLONG_MAX,
+ false) < 0) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ "%s",
+ _("Unable to parse HPT maxpagesize setting"));
+ goto error;
+ }
+ def->hpt_maxpagesize = VIR_DIV_UP(def->hpt_maxpagesize, 1024);
+
+ if (def->hpt_resizing != VIR_DOMAIN_HPT_RESIZING_NONE ||
+ def->hpt_maxpagesize > 0) {
def->features[val] = VIR_TRISTATE_SWITCH_ON;
+ }
break;
/* coverity[dead_error_begin] */
@@ -21987,15 +22003,18 @@ virDomainDefFeaturesCheckABIStability(virDomainDefPtr src,
case VIR_DOMAIN_FEATURE_HPT:
if (src->features[i] != dst->features[i] ||
- src->hpt_resizing != dst->hpt_resizing) {
+ src->hpt_resizing != dst->hpt_resizing ||
+ src->hpt_maxpagesize != dst->hpt_maxpagesize) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("State of feature '%s' differs: "
- "source: '%s,%s=%s', destination: '%s,%s=%s'"),
+ "source: '%s,%s=%s,%s=%llu', destination: '%s,%s=%s,%s=%llu'"),
featureName,
virTristateSwitchTypeToString(src->features[i]),
"resizing", virDomainHPTResizingTypeToString(src->hpt_resizing),
+ "maxpagesize", src->hpt_maxpagesize,
virTristateSwitchTypeToString(dst->features[i]),
- "resizing", virDomainHPTResizingTypeToString(dst->hpt_resizing));
+ "resizing", virDomainHPTResizingTypeToString(dst->hpt_resizing),
+ "maxpagesize", dst->hpt_maxpagesize);
return false;
}
break;
@@ -27778,15 +27797,22 @@ virDomainDefFormatInternal(virDomainDefPtr def,
break;
virBufferFreeAndReset(&attributeBuf);
+ virBufferFreeAndReset(&childrenBuf);
if (def->hpt_resizing != VIR_DOMAIN_HPT_RESIZING_NONE) {
virBufferAsprintf(&attributeBuf,
" resizing='%s'",
virDomainHPTResizingTypeToString(def->hpt_resizing));
}
+ if (def->hpt_maxpagesize > 0) {
+ virBufferSetChildIndent(&childrenBuf, buf);
+ virBufferAsprintf(&childrenBuf,
+ "<maxpagesize unit='KiB'>%llu</maxpagesize>\n",
+ def->hpt_maxpagesize);
+ }
if (virXMLFormatElement(buf, "hpt",
- &attributeBuf, NULL) < 0) {
+ &attributeBuf, &childrenBuf) < 0) {
goto error;
}
break;
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 39fa2bc35a..0924fc4f3c 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2439,6 +2439,7 @@ struct _virDomainDef {
unsigned int hyperv_spinlocks;
virGICVersion gic_version;
virDomainHPTResizing hpt_resizing;
+ unsigned long long hpt_maxpagesize; /* Stored in KiB */
char *hyperv_vendor_id;
int apic_eoi;
diff --git a/tests/qemuxml2argvdata/pseries-features.xml b/tests/qemuxml2argvdata/pseries-features.xml
index 5ef1a744c8..30cee5b81c 100644
--- a/tests/qemuxml2argvdata/pseries-features.xml
+++ b/tests/qemuxml2argvdata/pseries-features.xml
@@ -7,7 +7,9 @@
<type arch='ppc64' machine='pseries'>hvm</type>
</os>
<features>
- <hpt resizing='required'/>
+ <hpt resizing='required'>
+ <maxpagesize unit='GiB'>1</maxpagesize>
+ </hpt>
</features>
<devices>
<emulator>/usr/bin/qemu-system-ppc64</emulator>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 582a9de7bb..ac9593acbe 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1849,6 +1849,7 @@ mymain(void)
DO_TEST("pseries-features",
QEMU_CAPS_DEVICE_SPAPR_PCI_HOST_BRIDGE,
+ QEMU_CAPS_MACHINE_PSERIES_CAP_HPT_MAX_PAGE_SIZE,
QEMU_CAPS_MACHINE_PSERIES_RESIZE_HPT);
DO_TEST_FAILURE("pseries-features",
QEMU_CAPS_DEVICE_SPAPR_PCI_HOST_BRIDGE);
diff --git a/tests/qemuxml2xmloutdata/pseries-features.xml b/tests/qemuxml2xmloutdata/pseries-features.xml
index e8ed842fb6..f36705f011 100644
--- a/tests/qemuxml2xmloutdata/pseries-features.xml
+++ b/tests/qemuxml2xmloutdata/pseries-features.xml
@@ -9,7 +9,9 @@
<boot dev='hd'/>
</os>
<features>
- <hpt resizing='required'/>
+ <hpt resizing='required'>
+ <maxpagesize unit='KiB'>1048576</maxpagesize>
+ </hpt>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 4449954ad4..eac6d5b073 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -619,6 +619,7 @@ mymain(void)
DO_TEST("pseries-features",
QEMU_CAPS_DEVICE_SPAPR_PCI_HOST_BRIDGE,
+ QEMU_CAPS_MACHINE_PSERIES_CAP_HPT_MAX_PAGE_SIZE,
QEMU_CAPS_MACHINE_PSERIES_RESIZE_HPT);
DO_TEST("pseries-serial-native",
--
2.17.1
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