10:06 a.m.
Changes from v1:
* address review comments in 3/5;
* all other patches are unchanged.
Andrea Bolognani (5):
qemu: Use qemuDomainMachineIsVirt() more
tests: Check default GIC version for aarch64/virt TCG guests
qemu: Use GICv2 for aarch64/virt TCG guests
gic: Remove VIR_GIC_VERSION_DEFAULT
news: Update for GIC version on TCG changes
docs/news.xml | 11 +++++++++
src/qemu/qemu_capabilities.c | 7 +-----
src/qemu/qemu_command.c | 6 ++---
src/qemu/qemu_domain.c | 26 +++++++++++++++++++---
src/util/virgic.h | 3 ---
.../qemuxml2argv-aarch64-gic-none-tcg.args | 19 ++++++++++++++++
.../qemuxml2argv-aarch64-gic-none-tcg.xml | 17 ++++++++++++++
tests/qemuxml2argvtest.c | 3 +++
.../qemuxml2xmlout-aarch64-gic-none-tcg.xml | 25 +++++++++++++++++++++
tests/qemuxml2xmltest.c | 1 +
10 files changed, 103 insertions(+), 15 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.xml
create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
--
2.7.4
10:06 a.m.
New subject: [libvirt] [PATCH v2 1/5] qemu: Use qemuDomainMachineIsVirt() more
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/qemu/qemu_capabilities.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 71951e6..cf4dc74 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -5824,12 +5824,7 @@ virQEMUCapsFillDomainFeatureGICCaps(virQEMUCapsPtr qemuCaps,
virDomainCapsFeatureGICPtr gic = &domCaps->gic;
virGICVersion version;
- if (domCaps->arch != VIR_ARCH_ARMV7L &&
- domCaps->arch != VIR_ARCH_AARCH64)
- return 0;
-
- if (STRNEQ(domCaps->machine, "virt") &&
- !STRPREFIX(domCaps->machine, "virt-"))
+ if (!qemuDomainMachineIsVirt(domCaps->machine, domCaps->arch))
return 0;
for (version = VIR_GIC_VERSION_LAST - 1;
--
2.7.4
10:06 a.m.
New subject: [libvirt] [PATCH v2 2/5] tests: Check default GIC version for aarch64/virt TCG guests
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
.../qemuxml2argv-aarch64-gic-none-tcg.args | 19 ++++++++++++++++
.../qemuxml2argv-aarch64-gic-none-tcg.xml | 17 +++++++++++++++
tests/qemuxml2argvtest.c | 3 +++
.../qemuxml2xmlout-aarch64-gic-none-tcg.xml | 25 ++++++++++++++++++++++
tests/qemuxml2xmltest.c | 1 +
5 files changed, 65 insertions(+)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.xml
create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
new file mode 100644
index 0000000..975a014
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
@@ -0,0 +1,19 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-aarch64 \
+-name guest \
+-S \
+-machine virt,accel=tcg,gic-version=3 \
+-cpu cortex-a57 \
+-m 1024 \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 6ba410c5-1e5c-4d57-bee7-2228e7ffa32f \
+-nographic \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-guest/monitor.sock,server,nowait \
+-no-acpi \
+-boot c
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.xml
b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.xml
new file mode 100644
index 0000000..0aa33db
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.xml
@@ -0,0 +1,17 @@
+<domain type='qemu'>
+ <name>guest</name>
+ <uuid>6ba410c5-1e5c-4d57-bee7-2228e7ffa32f</uuid>
+ <memory unit='KiB'>1048576</memory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='aarch64' machine='virt'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <cpu mode='custom'>
+ <model>cortex-a57</model>
+ </cpu>
+ <devices>
+ <emulator>/usr/bin/qemu-system-aarch64</emulator>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index ce87938..8273725 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -2251,6 +2251,9 @@ mymain(void)
DO_TEST_GIC("aarch64-gic-none-both", GIC_BOTH,
QEMU_CAPS_KVM, QEMU_CAPS_MACHINE_OPT,
QEMU_CAPS_MACH_VIRT_GIC_VERSION);
+ DO_TEST_GIC("aarch64-gic-none-tcg", GIC_BOTH,
+ QEMU_CAPS_MACHINE_OPT,
+ QEMU_CAPS_MACH_VIRT_GIC_VERSION);
DO_TEST_GIC("aarch64-gic-default", GIC_NONE,
QEMU_CAPS_KVM, QEMU_CAPS_MACHINE_OPT);
DO_TEST_GIC("aarch64-gic-default", GIC_NONE,
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
b/tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
new file mode 100644
index 0000000..69510e2
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
@@ -0,0 +1,25 @@
+<domain type='qemu'>
+ <name>guest</name>
+ <uuid>6ba410c5-1e5c-4d57-bee7-2228e7ffa32f</uuid>
+ <memory unit='KiB'>1048576</memory>
+ <currentMemory unit='KiB'>1048576</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='aarch64' machine='virt'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <features>
+ <gic version='3'/>
+ </features>
+ <cpu mode='custom' match='exact' check='none'>
+ <model fallback='allow'>cortex-a57</model>
+ </cpu>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-aarch64</emulator>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 2dccde7..c75199e 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -1070,6 +1070,7 @@ mymain(void)
DO_TEST_FULL("aarch64-gic-none-v2", WHEN_BOTH, GIC_V2, NONE);
DO_TEST_FULL("aarch64-gic-none-v3", WHEN_BOTH, GIC_V3, NONE);
DO_TEST_FULL("aarch64-gic-none-both", WHEN_BOTH, GIC_BOTH, NONE);
+ DO_TEST_FULL("aarch64-gic-none-tcg", WHEN_BOTH, GIC_BOTH, NONE);
DO_TEST_FULL("aarch64-gic-default", WHEN_BOTH, GIC_NONE, NONE);
DO_TEST_FULL("aarch64-gic-default", WHEN_BOTH, GIC_V2, NONE);
DO_TEST_FULL("aarch64-gic-default", WHEN_BOTH, GIC_V3, NONE);
--
2.7.4
10:06 a.m.
New subject: [libvirt] [PATCH v2 3/5] qemu: Use GICv2 for aarch64/virt TCG guests
There are currently some limitations in the emulated GICv3
that make it unsuitable as a default. Use GICv2 instead.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1450433
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/qemu/qemu_domain.c | 23 +++++++++++++++++++++-
.../qemuxml2argv-aarch64-gic-none-tcg.args | 2 +-
.../qemuxml2xmlout-aarch64-gic-none-tcg.xml | 2 +-
3 files changed, 24 insertions(+), 3 deletions(-)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index cc02c80..079a134 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -2563,6 +2563,24 @@ qemuDomainDefEnableDefaultFeatures(virDomainDefPtr def,
for (version = VIR_GIC_VERSION_LAST - 1;
version > VIR_GIC_VERSION_NONE;
version--) {
+
+ /* We want to use the highest available GIC version for guests;
+ * however, the emulated GICv3 is currently lacking a MSI controller,
+ * making it unsuitable for the pure PCIe topology we aim for.
+ *
+ * For that reason, we skip this step entirely for TCG guests,
+ * and rely on the code below to pick the default version, GICv2,
+ * which supports all the features we need.
+ *
+ * We'll want to revisit this once MSI support for GICv3 has been
+ * implemented in QEMU.
+ *
+ * See https://bugzilla.redhat.com/show_bug.cgi?id=1414081 */
+ if (version == VIR_GIC_VERSION_3 &&
+ def->virtType == VIR_DOMAIN_VIRT_QEMU) {
+ continue;
+ }
+
if (virQEMUCapsSupportsGICVersion(qemuCaps,
def->virtType,
version)) {
@@ -2580,8 +2598,11 @@ qemuDomainDefEnableDefaultFeatures(virDomainDefPtr def,
/* Use the default GIC version if no version was specified */
if (def->features[VIR_DOMAIN_FEATURE_GIC] == VIR_TRISTATE_SWITCH_ON &&
- def->gic_version == VIR_GIC_VERSION_NONE)
+ def->gic_version == VIR_GIC_VERSION_NONE) {
+ VIR_DEBUG("Using GIC version %s (default)",
+ virGICVersionTypeToString(VIR_GIC_VERSION_DEFAULT));
def->gic_version = VIR_GIC_VERSION_DEFAULT;
+ }
}
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
index 975a014..52b6996 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
+++ b/tests/qemuxml2argvdata/qemuxml2argv-aarch64-gic-none-tcg.args
@@ -7,7 +7,7 @@ QEMU_AUDIO_DRV=none \
/usr/bin/qemu-system-aarch64 \
-name guest \
-S \
--machine virt,accel=tcg,gic-version=3 \
+-machine virt,accel=tcg \
-cpu cortex-a57 \
-m 1024 \
-smp 1,sockets=1,cores=1,threads=1 \
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
b/tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
index 69510e2..a0cd0b7 100644
--- a/tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-aarch64-gic-none-tcg.xml
@@ -9,7 +9,7 @@
<boot dev='hd'/>
</os>
<features>
- <gic version='3'/>
+ <gic version='2'/>
</features>
<cpu mode='custom' match='exact' check='none'>
<model fallback='allow'>cortex-a57</model>
--
2.7.4
9:31 a.m.
New subject: [libvirt] [PATCH v2 3/5] qemu: Use GICv2 for aarch64/virt TCG guests
On Mon, May 15, 2017 at 17:06:50 +0200, Andrea Bolognani wrote:
There are currently some limitations in the emulated GICv3
that make it unsuitable as a default. Use GICv2 instead.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1450433
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/qemu/qemu_domain.c | 23 +++++++++++++++++++++-
.../qemuxml2argv-aarch64-gic-none-tcg.args | 2 +-
.../qemuxml2xmlout-aarch64-gic-none-tcg.xml | 2 +-
3 files changed, 24 insertions(+), 3 deletions(-)
ACK
10:06 a.m.
New subject: [libvirt] [PATCH v2 4/5] gic: Remove VIR_GIC_VERSION_DEFAULT
The QEMU default is GICv2, and some of the code in libvirt
relies on the exact value. Stop pretending that's not the
case and use GICv2 explicitly where needed.
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/qemu/qemu_command.c | 6 +++---
src/qemu/qemu_domain.c | 7 +++----
src/util/virgic.h | 3 ---
3 files changed, 6 insertions(+), 10 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 813a851..c2a9415 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7374,9 +7374,9 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
goto cleanup;
}
- /* The default GIC version should not be specified on the
- * QEMU commandline for backwards compatibility reasons */
- if (def->gic_version != VIR_GIC_VERSION_DEFAULT) {
+ /* The default GIC version (GICv2) should not be specified on
+ * the QEMU commandline for backwards compatibility reasons */
+ if (def->gic_version != VIR_GIC_VERSION_2) {
if (!virQEMUCapsGet(qemuCaps,
QEMU_CAPS_MACH_VIRT_GIC_VERSION)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 079a134..fdffe17 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -2596,12 +2596,11 @@ qemuDomainDefEnableDefaultFeatures(virDomainDefPtr def,
def->features[VIR_DOMAIN_FEATURE_GIC] = VIR_TRISTATE_SWITCH_ON;
}
- /* Use the default GIC version if no version was specified */
+ /* Use the default GIC version (GICv2) if no version was specified */
if (def->features[VIR_DOMAIN_FEATURE_GIC] == VIR_TRISTATE_SWITCH_ON &&
def->gic_version == VIR_GIC_VERSION_NONE) {
- VIR_DEBUG("Using GIC version %s (default)",
- virGICVersionTypeToString(VIR_GIC_VERSION_DEFAULT));
- def->gic_version = VIR_GIC_VERSION_DEFAULT;
+ VIR_DEBUG("Using GIC version 2 (default)");
+ def->gic_version = VIR_GIC_VERSION_2;
}
}
diff --git a/src/util/virgic.h b/src/util/virgic.h
index 1c9efd6..2d77fdd 100644
--- a/src/util/virgic.h
+++ b/src/util/virgic.h
@@ -35,9 +35,6 @@ typedef enum {
VIR_ENUM_DECL(virGICVersion);
-/* Consider GIC v2 the default */
-# define VIR_GIC_VERSION_DEFAULT VIR_GIC_VERSION_2
-
typedef enum {
VIR_GIC_IMPLEMENTATION_NONE = 0,
VIR_GIC_IMPLEMENTATION_KERNEL = (1 << 1),
--
2.7.4
10:06 a.m.
New subject: [libvirt] [PATCH v2 5/5] news: Update for GIC version on TCG changes
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
docs/news.xml | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/docs/news.xml b/docs/news.xml
index 2f01449..4cf14b0 100644
--- a/docs/news.xml
+++ b/docs/news.xml
@@ -37,6 +37,17 @@
<section title="New features">
</section>
<section title="Improvements">
+ <change>
+ <summary>
+ qemu: Use GICv2 by default for aarch64/virt TCG guests
+ </summary>
+ <description>
+ The emulated GICv3 has some limitations that make it unusable as a
+ default; use GICv2 until they're sorted out. This change makes it
+ once again possible to run aarch64/virt guests on a x86_64 host
+ without having to tweak their configuration.
+ </description>
+ </change>
</section>
<section title="Bug fixes">
</section>
--
2.7.4
2782
days inactive
2783
days old
6 comments
2 participants
participants (2)
-
Andrea Bolognani -
Peter Krempa