[libvirt] [RFC 2/6] qemu: Probe GIC capabilities
Andrea Bolognani
abologna at redhat.com
Mon Mar 21 17:28:31 UTC 2016
Use the query-gic-capabilities QMP command to probe GIC
capabilities for a QEMU binary.
The information obtained is stored in virQEMUCaps.
---
src/qemu/qemu_capabilities.c | 24 ++++++++++++
src/qemu/qemu_monitor.c | 10 +++++
src/qemu/qemu_monitor.h | 4 ++
src/qemu/qemu_monitor_json.c | 90 ++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 4 ++
src/util/virgic.h | 13 +++++++
6 files changed, 145 insertions(+)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 4b1e750..e54208a 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -354,6 +354,9 @@ struct _virQEMUCaps {
char **machineTypes;
char **machineAliases;
unsigned int *machineMaxCpus;
+
+ size_t ngicCapabilities;
+ virGICCapability *gicCapabilities;
};
struct virQEMUCapsSearchData {
@@ -2690,6 +2693,22 @@ virQEMUCapsProbeQMPMigrationCapabilities(virQEMUCapsPtr qemuCaps,
return 0;
}
+static int
+virQEMUCapsProbeQMPGICCapabilities(virQEMUCapsPtr qemuCaps,
+ qemuMonitorPtr mon)
+{
+ virGICCapability *caps = NULL;
+ int ncaps;
+
+ if ((ncaps = qemuMonitorGetGICCapabilities(mon, &caps)) < 0)
+ return -1;
+
+ qemuCaps->gicCapabilities = caps;
+ qemuCaps->ngicCapabilities = ncaps;
+
+ return 0;
+}
+
int virQEMUCapsProbeQMP(virQEMUCapsPtr qemuCaps,
qemuMonitorPtr mon)
{
@@ -3410,6 +3429,11 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps,
if (virQEMUCapsProbeQMPMigrationCapabilities(qemuCaps, mon) < 0)
goto cleanup;
+ /* GIC capabilities, eg. available GIC versions */
+ if (ARCH_IS_ARM(qemuCaps->arch) &&
+ virQEMUCapsProbeQMPGICCapabilities(qemuCaps, mon) < 0)
+ goto cleanup;
+
ret = 0;
cleanup:
return ret;
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index ace3bb4..ac5fe8c 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3552,6 +3552,16 @@ qemuMonitorSetMigrationCapability(qemuMonitorPtr mon,
int
+qemuMonitorGetGICCapabilities(qemuMonitorPtr mon,
+ virGICCapability **capabilities)
+{
+ QEMU_CHECK_MONITOR_JSON(mon);
+
+ return qemuMonitorJSONGetGICCapabilities(mon, capabilities);
+}
+
+
+int
qemuMonitorNBDServerStart(qemuMonitorPtr mon,
const char *host,
unsigned int port)
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 4467a41..550eae0 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -34,6 +34,7 @@
# include "virnetdev.h"
# include "device_conf.h"
# include "cpu/cpu.h"
+# include "util/virgic.h"
typedef struct _qemuMonitor qemuMonitor;
typedef qemuMonitor *qemuMonitorPtr;
@@ -545,6 +546,9 @@ int qemuMonitorSetMigrationCapability(qemuMonitorPtr mon,
qemuMonitorMigrationCaps capability,
bool state);
+int qemuMonitorGetGICCapabilities(qemuMonitorPtr mon,
+ virGICCapability **capabilities);
+
typedef enum {
QEMU_MONITOR_MIGRATE_BACKGROUND = 1 << 0,
QEMU_MONITOR_MIGRATE_NON_SHARED_DISK = 1 << 1, /* migration with non-shared storage with full disk copy */
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 8352e53..dee2ee4 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -5744,6 +5744,96 @@ qemuMonitorJSONSetMigrationCapability(qemuMonitorPtr mon,
return ret;
}
+int
+qemuMonitorJSONGetGICCapabilities(qemuMonitorPtr mon,
+ virGICCapability **capabilities)
+{
+ int ret;
+ virJSONValuePtr cmd;
+ virJSONValuePtr reply = NULL;
+ virJSONValuePtr caps;
+ virGICCapability *list = NULL;
+ size_t i;
+ ssize_t n;
+
+ *capabilities = NULL;
+
+ if (!(cmd = qemuMonitorJSONMakeCommand("query-gic-capabilities",
+ NULL)))
+ return -1;
+
+ ret = qemuMonitorJSONCommand(mon, cmd, &reply);
+
+ if (ret == 0) {
+ if (qemuMonitorJSONHasError(reply, "CommandNotFound"))
+ goto cleanup;
+ ret = qemuMonitorJSONCheckError(cmd, reply);
+ }
+
+ if (ret < 0)
+ goto cleanup;
+
+ ret = -1;
+
+ if (!(caps = virJSONValueObjectGetArray(reply, "return")) ||
+ (n = virJSONValueArraySize(caps)) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing GIC capabilities"));
+ goto cleanup;
+ }
+
+ if (VIR_ALLOC_N(list, n + 1) < 0)
+ goto cleanup;
+
+ for (i = 0; i < n; i++) {
+ virJSONValuePtr cap = virJSONValueArrayGet(caps, i);
+ int version;
+ bool kernel;
+ bool emulated;
+
+ if (!cap || cap->type != VIR_JSON_TYPE_OBJECT) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing entry in GIC capabilities list"));
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetNumberInt(cap, "version", &version) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing GIC version"));
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetBoolean(cap, "kernel", &kernel) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing in-kernel GIC information"));
+ goto cleanup;
+ }
+
+ if (virJSONValueObjectGetBoolean(cap, "emulated", &emulated) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing emulated GIC information"));
+ goto cleanup;
+ }
+
+ list[i].version = version;
+ if (kernel)
+ list[i].implementation |= VIR_GIC_IMPLEMENTATION_KERNEL;
+ if (emulated)
+ list[i].implementation |= VIR_GIC_IMPLEMENTATION_EMULATED;
+ }
+
+ ret = n;
+ *capabilities = list;
+
+ cleanup:
+ if (ret < 0)
+ VIR_FREE(list);
+ virJSONValueFree(cmd);
+ virJSONValueFree(reply);
+
+ return ret;
+}
+
static virJSONValuePtr
qemuMonitorJSONBuildInetSocketAddress(const char *host,
const char *port)
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 4068187..09a8269 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -30,6 +30,7 @@
# include "qemu_monitor.h"
# include "virbitmap.h"
# include "cpu/cpu.h"
+# include "util/virgic.h"
int qemuMonitorJSONIOProcess(qemuMonitorPtr mon,
const char *data,
@@ -137,6 +138,9 @@ int qemuMonitorJSONSetMigrationCapability(qemuMonitorPtr mon,
qemuMonitorMigrationCaps capability,
bool state);
+int qemuMonitorJSONGetGICCapabilities(qemuMonitorPtr mon,
+ virGICCapability **capabilities);
+
int qemuMonitorJSONMigrate(qemuMonitorPtr mon,
unsigned int flags,
const char *uri);
diff --git a/src/util/virgic.h b/src/util/virgic.h
index 470ce95..1c9efd6 100644
--- a/src/util/virgic.h
+++ b/src/util/virgic.h
@@ -38,4 +38,17 @@ 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),
+ VIR_GIC_IMPLEMENTATION_EMULATED = (1 << 2)
+} virGICImplementation;
+
+typedef struct _virGICCapability virGICCapability;
+typedef virGICCapability *virGICCapabilityPtr;
+struct _virGICCapability {
+ virGICVersion version;
+ virGICImplementation implementation;
+};
+
#endif /* __VIR_GIC_H__ */
--
2.5.5
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