[libvirt] [PATCH 0/6] qemu: Implement nested HV support for pSeries guests

[Andrea Bolognani]

Andrea Bolognani (6):
qemu: Drop duplicated code from qemuDomainDefValidateFeatures()
tests: Add capabilities data for QEMU 3.1.0 on ppc64
qemu: Introduce QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV
conf: Parse and format nested-hv feature
qemu: Format nested-hv feature on the command line
news: Document nested-hv feature

docs/formatdomain.html.in | 12 +
docs/news.xml | 10 +
docs/schemas/domaincommon.rng | 5 +
src/conf/domain_conf.c | 4 +
src/conf/domain_conf.h | 1 +
src/qemu/qemu_capabilities.c | 2 +
src/qemu/qemu_capabilities.h | 1 +
src/qemu/qemu_command.c | 20 +
src/qemu/qemu_domain.c | 15 +-
.../caps_3.1.0.ppc64.replies | 23503 ++++++++++++++++
.../qemucapabilitiesdata/caps_3.1.0.ppc64.xml | 1076 +
tests/qemucapabilitiestest.c | 1 +
.../qemucaps2xmloutdata/caps_3.1.0.ppc64.xml | 26 +
tests/qemucaps2xmltest.c | 1 +
tests/qemuxml2argvdata/pseries-features.args | 2 +-
tests/qemuxml2argvdata/pseries-features.xml | 1 +
tests/qemuxml2argvtest.c | 1 +
tests/qemuxml2xmloutdata/pseries-features.xml | 1 +
tests/qemuxml2xmltest.c | 1 +
19 files changed, 24669 insertions(+), 14 deletions(-)
create mode 100644 tests/qemucapabilitiesdata/caps_3.1.0.ppc64.replies
create mode 100644 tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
create mode 100644 tests/qemucaps2xmloutdata/caps_3.1.0.ppc64.xml

[Andrea Bolognani]

Both VIR_DOMAIN_FEATURE_HPT and VIR_DOMAIN_FEATURE_HTM are
handled in the exact same way, so we can remove some duplicated
code without losing any functionality.

Signed-off-by: Andrea Bolognani <***@redhat.com>
---
There are plenty more opportunities for refactoring in the code
that handles features, but I didn't want to fall into the usual
yak-shaving trap so I'm going to work on those now and send the
changes as a separate series.

src/qemu/qemu_domain.c | 14 +-------------
1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 2f65bbe34e..a8a235a897 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -3889,6 +3889,7 @@ qemuDomainDefValidateFeatures(const virDomainDef *def,
break;

case VIR_DOMAIN_FEATURE_HPT:
+ case VIR_DOMAIN_FEATURE_HTM:
if (def->features[i] != VIR_TRISTATE_SWITCH_ABSENT &&
!qemuDomainIsPSeries(def)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
@@ -3923,19 +3924,6 @@ qemuDomainDefValidateFeatures(const virDomainDef *def,
}
break;

- case VIR_DOMAIN_FEATURE_HTM:
- if (def->features[i] != VIR_TRISTATE_SWITCH_ABSENT &&
- !qemuDomainIsPSeries(def)) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- _("The '%s' feature is not supported for "
- "architecture '%s' or machine type '%s'"),
- featureName,
- virArchToString(def->os.arch),
- def->os.machine);
- return -1;
- }
- break;
-
case VIR_DOMAIN_FEATURE_ACPI:
case VIR_DOMAIN_FEATURE_APIC:
case VIR_DOMAIN_FEATURE_PAE:

[Andrea Bolognani]

Signed-off-by: Andrea Bolognani <***@redhat.com>
---
docs/formatdomain.html.in | 12 ++++++++++++
docs/schemas/domaincommon.rng | 5 +++++
src/conf/domain_conf.c | 4 ++++
src/conf/domain_conf.h | 1 +
src/qemu/qemu_domain.c | 1 +
tests/qemuxml2argvdata/pseries-features.xml | 1 +
tests/qemuxml2xmloutdata/pseries-features.xml | 1 +
7 files changed, 25 insertions(+)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 2af4960981..84259c45e4 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -2295,6 +2295,18 @@
defined, the hypervisor default will be used.
<span class="since">Since 4.6.0</span> (QEMU/KVM only)
</dd>
+ <dt><code>nested-hv</code></dt>
+ <dd>Configure nested HV availability for pSeries guests. This needs to
+ be enabled from the host (L0) in order to be effective; having HV
+ support in the (L1) guest is very desiderable if it's planned to
+ run nested (L2) guests inside it, because it will result in those
+ nested guests having much better performance than they would when
+ using KVM PR or TCG.
+ Possible values for the <code>state</code> attribute are
+ <code>on</code> and <code>off</code>. If the attribute is not
+ defined, the hypervisor default will be used.
+ <span class="since">Since 4.10.0</span> (QEMU/KVM only)
+ </dd>
</dl>

<h3><a id="elementsTime">Time keeping</a></h3>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 5ee727eefa..d7a022a4ae 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -4976,6 +4976,11 @@
<ref name="featurestate"/>
</element>
</optional>
+ <optional>
+ <element name="nested-hv">
+ <ref name="featurestate"/>
+ </element>
+ </optional>
</interleave>
</element>
</optional>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 13874837c2..90f5618a04 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -153,6 +153,7 @@ VIR_ENUM_IMPL(virDomainFeature, VIR_DOMAIN_FEATURE_LAST,
"hpt",
"vmcoreinfo",
"htm",
+ "nested-hv",
);

VIR_ENUM_IMPL(virDomainCapabilitiesPolicy, VIR_DOMAIN_CAPABILITIES_POLICY_LAST,
@@ -20155,6 +20156,7 @@ virDomainDefParseXML(xmlDocPtr xml,
break;

case VIR_DOMAIN_FEATURE_HTM:
+ case VIR_DOMAIN_FEATURE_NESTED_HV:
if (!(tmp = virXMLPropString(nodes[i], "state"))) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("missing state attribute '%s' of feature '%s'"),
@@ -22317,6 +22319,7 @@ virDomainDefFeaturesCheckABIStability(virDomainDefPtr src,
case VIR_DOMAIN_FEATURE_SMM:
case VIR_DOMAIN_FEATURE_VMCOREINFO:
case VIR_DOMAIN_FEATURE_HTM:
+ case VIR_DOMAIN_FEATURE_NESTED_HV:
if (src->features[i] != dst->features[i]) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("State of feature '%s' differs: "
@@ -28232,6 +28235,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
case VIR_DOMAIN_FEATURE_PVSPINLOCK:
case VIR_DOMAIN_FEATURE_VMPORT:
case VIR_DOMAIN_FEATURE_HTM:
+ case VIR_DOMAIN_FEATURE_NESTED_HV:
switch ((virTristateSwitch) def->features[i]) {
case VIR_TRISTATE_SWITCH_LAST:
case VIR_TRISTATE_SWITCH_ABSENT:
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 467785cd83..b84db2ab7c 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1777,6 +1777,7 @@ typedef enum {
VIR_DOMAIN_FEATURE_HPT,
VIR_DOMAIN_FEATURE_VMCOREINFO,
VIR_DOMAIN_FEATURE_HTM,
+ VIR_DOMAIN_FEATURE_NESTED_HV,

VIR_DOMAIN_FEATURE_LAST
} virDomainFeature;
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index a8a235a897..ee61caa823 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -3890,6 +3890,7 @@ qemuDomainDefValidateFeatures(const virDomainDef *def,

case VIR_DOMAIN_FEATURE_HPT:
case VIR_DOMAIN_FEATURE_HTM:
+ case VIR_DOMAIN_FEATURE_NESTED_HV:
if (def->features[i] != VIR_TRISTATE_SWITCH_ABSENT &&
!qemuDomainIsPSeries(def)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
diff --git a/tests/qemuxml2argvdata/pseries-features.xml b/tests/qemuxml2argvdata/pseries-features.xml
index 5c842fe87b..6f7d32b065 100644
--- a/tests/qemuxml2argvdata/pseries-features.xml
+++ b/tests/qemuxml2argvdata/pseries-features.xml
@@ -11,6 +11,7 @@
<maxpagesize unit='GiB'>1</maxpagesize>
</hpt>
<htm state='on'/>
+ <nested-hv state='off'/>
</features>
<devices>
<emulator>/usr/bin/qemu-system-ppc64</emulator>
diff --git a/tests/qemuxml2xmloutdata/pseries-features.xml b/tests/qemuxml2xmloutdata/pseries-features.xml
index 55a44c75a0..7e12bc9c03 100644
--- a/tests/qemuxml2xmloutdata/pseries-features.xml
+++ b/tests/qemuxml2xmloutdata/pseries-features.xml
@@ -13,6 +13,7 @@
<maxpagesize unit='KiB'>1048576</maxpagesize>
</hpt>
<htm state='on'/>
+ <nested-hv state='off'/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>

[Andrea Bolognani]

Signed-off-by: Andrea Bolognani <***@redhat.com>
---
src/qemu/qemu_command.c | 20 ++++++++++++++++++++
tests/qemuxml2argvdata/pseries-features.args | 2 +-
2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 23a6661c10..315419c71b 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7468,6 +7468,26 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
virBufferAsprintf(&buf, ",cap-htm=%s", str);
}

+ if (def->features[VIR_DOMAIN_FEATURE_NESTED_HV] != VIR_TRISTATE_SWITCH_ABSENT) {
+ const char *str;
+
+ if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Nested HV configuration is not supported by "
+ "this QEMU binary"));
+ goto cleanup;
+ }
+
+ str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_NESTED_HV]);
+ if (!str) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Invalid setting for nested HV state"));
+ goto cleanup;
+ }
+
+ virBufferAsprintf(&buf, ",cap-nested-hv=%s", str);
+ }
+
if (cpu && cpu->model &&
cpu->mode == VIR_CPU_MODE_HOST_MODEL &&
qemuDomainIsPSeries(def) &&
diff --git a/tests/qemuxml2argvdata/pseries-features.args b/tests/qemuxml2argvdata/pseries-features.args
index 5d4b5ce930..0acab91c2a 100644
--- a/tests/qemuxml2argvdata/pseries-features.args
+++ b/tests/qemuxml2argvdata/pseries-features.args
@@ -8,7 +8,7 @@ QEMU_AUDIO_DRV=none \
-name guest \
-S \
-machine pseries,accel=tcg,usb=off,dump-guest-core=off,resize-hpt=required,\
-cap-hpt-max-page-size=1048576k,cap-htm=on \
+cap-hpt-max-page-size=1048576k,cap-htm=on,cap-nested-hv=off \
-m 512 \
-smp 1,sockets=1,cores=1,threads=1 \
-uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \

[Michal Privoznik]

Post by Andrea Bolognani
---
src/qemu/qemu_command.c | 20 ++++++++++++++++++++
tests/qemuxml2argvdata/pseries-features.args | 2 +-
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 23a6661c10..315419c71b 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7468,6 +7468,26 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
virBufferAsprintf(&buf, ",cap-htm=%s", str);
}
+ if (def->features[VIR_DOMAIN_FEATURE_NESTED_HV] != VIR_TRISTATE_SWITCH_ABSENT) {
+ const char *str;
+
+ if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Nested HV configuration is not supported by "
+ "this QEMU binary"));
+ goto cleanup;
+ }
+
+ str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_NESTED_HV]);
+ if (!str) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Invalid setting for nested HV state"));
+ goto cleanup;
+ }

How can this be? The only possibility I see if
def->features[VIR_DOMAIN_FEATURE_NESTED_HV] wasn't 1 or 2. But then we
are in much bigger trouble anyway. I suggest removing it. We don't check
for the retval anywhere else.

Post by Andrea Bolognani
+
+ virBufferAsprintf(&buf, ",cap-nested-hv=%s", str);
+ }
+
if (cpu && cpu->model &&
cpu->mode == VIR_CPU_MODE_HOST_MODEL &&
qemuDomainIsPSeries(def) &&
diff --git a/tests/qemuxml2argvdata/pseries-features.args b/tests/qemuxml2argvdata/pseries-features.args
index 5d4b5ce930..0acab91c2a 100644
--- a/tests/qemuxml2argvdata/pseries-features.args
+++ b/tests/qemuxml2argvdata/pseries-features.args
@@ -8,7 +8,7 @@ QEMU_AUDIO_DRV=none \
-name guest \
-S \
-machine pseries,accel=tcg,usb=off,dump-guest-core=off,resize-hpt=required,\
-cap-hpt-max-page-size=1048576k,cap-htm=on \
+cap-hpt-max-page-size=1048576k,cap-htm=on,cap-nested-hv=off \
-m 512 \
-smp 1,sockets=1,cores=1,threads=1 \
-uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \

Michal

[Andrea Bolognani]

[...]

Post by Michal Privoznik

Post by Andrea Bolognani
+ str = virTristateSwitchTypeToString(def->features[VIR_DOMAIN_FEATURE_NESTED_HV]);
+ if (!str) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Invalid setting for nested HV state"));
+ goto cleanup;
+ }

How can this be? The only possibility I see if
def->features[VIR_DOMAIN_FEATURE_NESTED_HV] wasn't 1 or 2. But then we
are in much bigger trouble anyway. I suggest removing it. We don't check
for the retval anywhere else.

We check it at least for FEATURE_HTM and FEATURE_HPT; then again,
it was me who introduced those features, so... O:-)

I've left it as-is for the time being, but I can post a patch that
gets rid of all such checks in one fell swoop if you'd like.

And thanks for the review!

[Andrea Bolognani]

Signed-off-by: Andrea Bolognani <***@redhat.com>
---
Snipped heavily; the full patch can be retrieved from

https://github.com/andreabolognani/libvirt/tree/nested-hv

.../caps_3.1.0.ppc64.replies | 23503 ++++++++++++++++
.../qemucapabilitiesdata/caps_3.1.0.ppc64.xml | 1075 +
tests/qemucapabilitiestest.c | 1 +
.../qemucaps2xmloutdata/caps_3.1.0.ppc64.xml | 26 +
tests/qemucaps2xmltest.c | 1 +
5 files changed, 24606 insertions(+)
create mode 100644 tests/qemucapabilitiesdata/caps_3.1.0.ppc64.replies
create mode 100644 tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
create mode 100644 tests/qemucaps2xmloutdata/caps_3.1.0.ppc64.xml

diff --git a/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.replies b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.replies
new file mode 100644
index 0000000000..5f57a3bb18
--- /dev/null
+++ b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.replies
@@ -0,0 +1,23503 @@
+{
+ "execute": "qmp_capabilities",
+ "id": "libvirt-1"
+}
+
+{
+ "return": {
+ },
+ "id": "libvirt-1"
+}
+
+{
+ "execute": "query-version",
+ "id": "libvirt-2"
+}
+
+{
+ "return": {
+ "qemu": {
+ "micro": 91,
+ "minor": 0,
+ "major": 3
+ },
+ "package": "v3.1.0-rc1-74-g3c035a41dc"
+ },
+ "id": "libvirt-2"
+}
[...]
diff --git a/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
new file mode 100644
index 0000000000..e3e1b6b281
--- /dev/null
+++ b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
@@ -0,0 +1,1075 @@
+<qemuCaps>
[...]
+ <version>3000091</version>
+ <kvmVersion>0</kvmVersion>
+ <microcodeVersion>437731</microcodeVersion>
+ <package>v3.1.0-rc1-74-g3c035a41dc</package>
+ <arch>ppc64</arch>
[...]
diff --git a/tests/qemucapabilitiestest.c b/tests/qemucapabilitiestest.c
index 8fe5a55e1d..ff7e9601a2 100644
--- a/tests/qemucapabilitiestest.c
+++ b/tests/qemucapabilitiestest.c
@@ -186,6 +186,7 @@ mymain(void)
DO_TEST("ppc64", "caps_2.10.0");
DO_TEST("ppc64", "caps_2.12.0");
DO_TEST("ppc64", "caps_3.0.0");
+ DO_TEST("ppc64", "caps_3.1.0");
DO_TEST("s390x", "caps_2.7.0");
DO_TEST("s390x", "caps_2.8.0");
DO_TEST("s390x", "caps_2.9.0");
diff --git a/tests/qemucaps2xmloutdata/caps_3.1.0.ppc64.xml b/tests/qemucaps2xmloutdata/caps_3.1.0.ppc64.xml
new file mode 100644
index 0000000000..85623f3980
--- /dev/null
+++ b/tests/qemucaps2xmloutdata/caps_3.1.0.ppc64.xml
@@ -0,0 +1,26 @@
+<capabilities>
+
+ <host>
+ <cpu>
+ <arch>ppc64</arch>
+ </cpu>
+ <power_management/>
+ <iommu support='no'/>
+ </host>
+
+ <guest>
+ <os_type>hvm</os_type>
+ <arch name='ppc64'>
+ <wordsize>64</wordsize>
+ <emulator>/usr/bin/qemu-system-ppc64</emulator>
+ <domain type='qemu'/>
+ <domain type='kvm'/>
+ </arch>
+ <features>
+ <cpuselection/>
+ <deviceboot/>
+ <disksnapshot default='on' toggle='no'/>
+ </features>
+ </guest>
+
+</capabilities>
diff --git a/tests/qemucaps2xmltest.c b/tests/qemucaps2xmltest.c
index 883909a973..3688c4a3b4 100644
--- a/tests/qemucaps2xmltest.c
+++ b/tests/qemucaps2xmltest.c
@@ -208,6 +208,7 @@ mymain(void)
DO_TEST("ppc64", "caps_2.10.0");
DO_TEST("ppc64", "caps_2.12.0");
DO_TEST("ppc64", "caps_3.0.0");
+ DO_TEST("ppc64", "caps_3.1.0");
DO_TEST("s390x", "caps_2.7.0");
DO_TEST("s390x", "caps_2.8.0");
DO_TEST("s390x", "caps_2.9.0");

[Andrea Bolognani]

Signed-off-by: Andrea Bolognani <***@redhat.com>
---
src/qemu/qemu_capabilities.c | 2 ++
src/qemu/qemu_capabilities.h | 1 +
tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml | 1 +
tests/qemuxml2argvtest.c | 1 +
tests/qemuxml2xmltest.c | 1 +
5 files changed, 6 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index fde27010e4..20a1a0c201 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -515,6 +515,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
/* 320 */
"memory-backend-memfd.hugetlb",
"iothread.poll-max-ns",
+ "machine.pseries.cap-nested-hv",
);


@@ -1372,6 +1373,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsMemoryBackendMemfd[]
static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsSPAPRMachine[] = {
{ "cap-hpt-max-page-size", QEMU_CAPS_MACHINE_PSERIES_CAP_HPT_MAX_PAGE_SIZE },
{ "cap-htm", QEMU_CAPS_MACHINE_PSERIES_CAP_HTM },
+ { "cap-nested-hv", QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV },
};

static virQEMUCapsObjectTypeProps virQEMUCapsObjectProps[] = {
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index c2caaf6fe1..b1990b6bb8 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -499,6 +499,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
/* 320 */
QEMU_CAPS_OBJECT_MEMORY_MEMFD_HUGETLB, /* -object memory-backend-memfd.hugetlb */
QEMU_CAPS_IOTHREAD_POLLING, /* -object iothread.poll-max-ns */
+ QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV, /* -machine pseries.cap-nested-hv */

QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
index e3e1b6b281..b06b17316a 100644
--- a/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
@@ -165,6 +165,7 @@
<flag name='memory-backend-memfd'/>
<flag name='memory-backend-memfd.hugetlb'/>
<flag name='iothread.poll-max-ns'/>
+ <flag name='machine.pseries.cap-nested-hv'/>
<version>3000091</version>
<kvmVersion>0</kvmVersion>
<microcodeVersion>437731</microcodeVersion>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 95429b3ae7..eae2b7edf7 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1981,6 +1981,7 @@ mymain(void)
QEMU_CAPS_DEVICE_SPAPR_PCI_HOST_BRIDGE,
QEMU_CAPS_MACHINE_PSERIES_CAP_HPT_MAX_PAGE_SIZE,
QEMU_CAPS_MACHINE_PSERIES_CAP_HTM,
+ QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV,
QEMU_CAPS_MACHINE_PSERIES_RESIZE_HPT);
DO_TEST_FAILURE("pseries-features",
QEMU_CAPS_DEVICE_SPAPR_PCI_HOST_BRIDGE);
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 4d1a3610ef..2527497675 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -621,6 +621,7 @@ mymain(void)
QEMU_CAPS_DEVICE_SPAPR_PCI_HOST_BRIDGE,
QEMU_CAPS_MACHINE_PSERIES_CAP_HPT_MAX_PAGE_SIZE,
QEMU_CAPS_MACHINE_PSERIES_CAP_HTM,
+ QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV,
QEMU_CAPS_MACHINE_PSERIES_RESIZE_HPT);

DO_TEST("pseries-serial-native",

[Andrea Bolognani]

Signed-off-by: Andrea Bolognani <***@redhat.com>
---
docs/news.xml | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/docs/news.xml b/docs/news.xml
index 4406aeb775..3569c6cd48 100644
--- a/docs/news.xml
+++ b/docs/news.xml
@@ -68,6 +68,16 @@
be viewed via the domain statistics.
</description>
</change>
+ <change>
+ <summary>
+ qemu: Add support for nested HV for pSeries guests
+ </summary>
+ <description>
+ Nested HV support makes it possible to run nested (L2) guests
+ with minimal performance penalty when compared to regular (L1)
+ guests on ppc64 hardware.
+ </description>
+ </change>
</section>
<section title="Improvements">
</section>

[Michal Privoznik]

Post by Andrea Bolognani
qemu: Drop duplicated code from qemuDomainDefValidateFeatures()
tests: Add capabilities data for QEMU 3.1.0 on ppc64
qemu: Introduce QEMU_CAPS_MACHINE_PSERIES_CAP_NESTED_HV
conf: Parse and format nested-hv feature
qemu: Format nested-hv feature on the command line
news: Document nested-hv feature
docs/formatdomain.html.in | 12 +
docs/news.xml | 10 +
docs/schemas/domaincommon.rng | 5 +
src/conf/domain_conf.c | 4 +
src/conf/domain_conf.h | 1 +
src/qemu/qemu_capabilities.c | 2 +
src/qemu/qemu_capabilities.h | 1 +
src/qemu/qemu_command.c | 20 +
src/qemu/qemu_domain.c | 15 +-
.../caps_3.1.0.ppc64.replies | 23503 ++++++++++++++++
.../qemucapabilitiesdata/caps_3.1.0.ppc64.xml | 1076 +
tests/qemucapabilitiestest.c | 1 +
.../qemucaps2xmloutdata/caps_3.1.0.ppc64.xml | 26 +
tests/qemucaps2xmltest.c | 1 +
tests/qemuxml2argvdata/pseries-features.args | 2 +-
tests/qemuxml2argvdata/pseries-features.xml | 1 +
tests/qemuxml2argvtest.c | 1 +
tests/qemuxml2xmloutdata/pseries-features.xml | 1 +
tests/qemuxml2xmltest.c | 1 +
19 files changed, 24669 insertions(+), 14 deletions(-)
create mode 100644 tests/qemucapabilitiesdata/caps_3.1.0.ppc64.replies
create mode 100644 tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
create mode 100644 tests/qemucaps2xmloutdata/caps_3.1.0.ppc64.xml

ACK

Michal