[libvirt] [PATCH 4/7] qemu: Add monitor APIs to fetch CPUID data from QEMU
Jiri Denemark
jdenemar at redhat.com
Tue Jul 23 16:11:33 UTC 2013
---
src/qemu/qemu_monitor.c | 21 +++
src/qemu/qemu_monitor.h | 3 +
src/qemu/qemu_monitor_json.c | 162 +++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 6 +
tests/Makefile.am | 1 +
.../qemumonitorjson-getcpu-empty.data | 2 +
.../qemumonitorjson-getcpu-empty.json | 46 ++++++
.../qemumonitorjson-getcpu-filtered.data | 4 +
.../qemumonitorjson-getcpu-filtered.json | 46 ++++++
.../qemumonitorjson-getcpu-full.data | 4 +
.../qemumonitorjson-getcpu-full.json | 46 ++++++
.../qemumonitorjson-getcpu-host.data | 5 +
.../qemumonitorjson-getcpu-host.json | 45 ++++++
tests/qemumonitorjsontest.c | 74 ++++++++++
14 files changed, 465 insertions(+)
create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-empty.data
create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-empty.json
create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-filtered.data
create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-filtered.json
create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.data
create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.json
create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.data
create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.json
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 0b73411..695cf19 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3839,3 +3839,24 @@ qemuMonitorGetDeviceAliases(qemuMonitorPtr mon,
return qemuMonitorJSONGetDeviceAliases(mon, aliases);
}
+
+virCPUDefPtr
+qemuMonitorGetCPU(qemuMonitorPtr mon,
+ virArch arch)
+{
+ VIR_DEBUG("mon=%p, arch=%s", mon, virArchToString(arch));
+
+ if (!mon) {
+ virReportError(VIR_ERR_INVALID_ARG, "%s",
+ _("monitor must not be NULL"));
+ return NULL;
+ }
+
+ if (!mon->json) {
+ virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
+ _("JSON monitor is required"));
+ return NULL;
+ }
+
+ return qemuMonitorJSONGetCPU(mon, arch);
+}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 4a55501..8a312bd 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -717,6 +717,9 @@ int qemuMonitorDetachCharDev(qemuMonitorPtr mon,
int qemuMonitorGetDeviceAliases(qemuMonitorPtr mon,
char ***aliases);
+virCPUDefPtr qemuMonitorGetCPU(qemuMonitorPtr mon,
+ virArch arch);
+
/**
* When running two dd process and using <> redirection, we need a
* shell that will not truncate files. These two strings serve that
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 12f7e69..617bfdf 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -42,6 +42,7 @@
#include "virerror.h"
#include "virjson.h"
#include "virstring.h"
+#include "cpu/cpu_x86.h"
#ifdef WITH_DTRACE_PROBES
# include "libvirt_qemu_probes.h"
@@ -49,6 +50,7 @@
#define VIR_FROM_THIS VIR_FROM_QEMU
+#define QOM_CPU_PATH "/machine/unattached/device[0]"
#define LINE_ENDING "\r\n"
@@ -5453,3 +5455,163 @@ cleanup:
VIR_FREE(paths);
return ret;
}
+
+
+static int
+qemuMonitorJSONParseCPUFeatureWord(virJSONValuePtr data,
+ struct cpuX86cpuid *cpuid)
+{
+ const char *reg;
+ unsigned long long fun;
+ unsigned long long features;
+
+ memset(cpuid, 0, sizeof(*cpuid));
+
+ if (!(reg = virJSONValueObjectGetString(data, "cpuid-register"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing cpuid-register in CPU data"));
+ return -1;
+ }
+ if (virJSONValueObjectGetNumberUlong(data, "cpuid-input-eax", &fun)) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing or invalid cpuid-input-eax in CPU data"));
+ return -1;
+ }
+ if (virJSONValueObjectGetNumberUlong(data, "features", &features) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing or invalid features in CPU data"));
+ return -1;
+ }
+
+ cpuid->function = fun;
+ if (STREQ(reg, "EAX")) {
+ cpuid->eax = features;
+ } else if (STREQ(reg, "EBX")) {
+ cpuid->ebx = features;
+ } else if (STREQ(reg, "ECX")) {
+ cpuid->ecx = features;
+ } else if (STREQ(reg, "EDX")) {
+ cpuid->edx = features;
+ } else {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("unknown CPU register '%s'"), reg);
+ return -1;
+ }
+
+ return 0;
+}
+
+virCPUDataPtr
+qemuMonitorJSONGetCPUData(qemuMonitorPtr mon,
+ const char *property)
+{
+ virJSONValuePtr cmd;
+ virJSONValuePtr reply = NULL;
+ virJSONValuePtr data;
+ virCPUDataPtr cpuData = NULL;
+ struct cpuX86Data *x86Data = NULL;
+ struct cpuX86cpuid cpuid;
+ size_t i;
+ int ret;
+ int n;
+
+ if (!(cmd = qemuMonitorJSONMakeCommand("qom-get",
+ "s:path", QOM_CPU_PATH,
+ "s:property", property,
+ NULL)))
+ return NULL;
+
+ ret = qemuMonitorJSONCommand(mon, cmd, &reply);
+
+ if (ret == 0)
+ ret = qemuMonitorJSONCheckError(cmd, reply);
+
+ if (ret < 0)
+ goto cleanup;
+
+ if (!(data = virJSONValueObjectGet(reply, "return"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("qom-get reply was missing return data"));
+ goto cleanup;
+ }
+
+ if ((n = virJSONValueArraySize(data)) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("%s CPU property did not return an array"),
+ property);
+ goto cleanup;
+ }
+
+ if (VIR_ALLOC(x86Data) < 0)
+ goto cleanup;
+
+ for (i = 0; i < n; i++) {
+ if (qemuMonitorJSONParseCPUFeatureWord(virJSONValueArrayGet(data, i),
+ &cpuid) < 0 ||
+ x86DataAddCpuid(x86Data, &cpuid) < 0)
+ goto cleanup;
+ }
+
+ cpuData = x86MakeCPUData(VIR_ARCH_X86_64, &x86Data);
+
+cleanup:
+ virJSONValueFree(cmd);
+ virJSONValueFree(reply);
+ x86DataFree(x86Data);
+ return cpuData;
+}
+
+static int
+qemuMonitorJSONGetCPUVendor(qemuMonitorPtr mon,
+ virCPUDataPtr data)
+{
+ qemuMonitorJSONObjectProperty prop;
+ int ret;
+
+ prop.type = QEMU_MONITOR_OBJECT_PROPERTY_STRING;
+ if (qemuMonitorJSONGetObjectProperty(mon, QOM_CPU_PATH,
+ "vendor", &prop) < 0)
+ return -1;
+
+ ret = x86DataSetVendor(data->data.x86, prop.val.str);
+
+ VIR_FREE(prop.val.str);
+ return ret;
+}
+
+virCPUDefPtr
+qemuMonitorJSONGetCPU(qemuMonitorPtr mon,
+ virArch arch)
+{
+ virCPUDefPtr cpu;
+ virCPUDataPtr data = NULL;
+
+ if (arch != VIR_ARCH_I686 && arch != VIR_ARCH_X86_64) {
+ virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
+ _("cannot get CPU data for arch %s"),
+ virArchToString(arch));
+ return NULL;
+ }
+
+ if (VIR_ALLOC(cpu) < 0)
+ return NULL;
+
+ cpu->arch = arch;
+ cpu->type = VIR_CPU_TYPE_HOST;
+
+ if (!(data = qemuMonitorJSONGetCPUData(mon, "feature-words")) ||
+ qemuMonitorJSONGetCPUVendor(mon, data) < 0)
+ goto error;
+
+ if (cpuDecode(cpu, data, NULL, 0, NULL) < 0)
+ goto error;
+
+cleanup:
+ cpuDataFree(data);
+ return cpu;
+
+error:
+ virCPUDefFree(cpu);
+ cpu = NULL;
+ goto cleanup;
+}
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 51cf19c..ffc8d68 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -29,6 +29,7 @@
# include "qemu_monitor.h"
# include "virbitmap.h"
+# include "cpu/cpu.h"
int qemuMonitorJSONIOProcess(qemuMonitorPtr mon,
const char *data,
@@ -426,4 +427,9 @@ int qemuMonitorJSONDetachCharDev(qemuMonitorPtr mon,
int qemuMonitorJSONGetDeviceAliases(qemuMonitorPtr mon,
char ***aliases);
+virCPUDataPtr qemuMonitorJSONGetCPUData(qemuMonitorPtr mon,
+ const char *property);
+virCPUDefPtr qemuMonitorJSONGetCPU(qemuMonitorPtr mon,
+ virArch arch);
+
#endif /* QEMU_MONITOR_JSON_H */
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 5ea806e..8343ce1 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -81,6 +81,7 @@ EXTRA_DIST = \
oomtrace.pl \
qemuhelpdata \
qemuhotplugtestdata \
+ qemumonitorjsondata \
qemuxml2argvdata \
qemuxml2xmloutdata \
qemuxmlnsdata \
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-getcpu-empty.data b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-empty.data
new file mode 100644
index 0000000..2b3c111
--- /dev/null
+++ b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-empty.data
@@ -0,0 +1,2 @@
+<cpudata arch='x86'>
+</cpudata>
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-getcpu-empty.json b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-empty.json
new file mode 100644
index 0000000..36db555
--- /dev/null
+++ b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-empty.json
@@ -0,0 +1,46 @@
+{
+ "return": [
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 2147483658,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EAX",
+ "cpuid-input-eax": 1073741825,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 3221225473,
+ "features": 0
+ },
+ {
+ "cpuid-register": "ECX",
+ "cpuid-input-eax": 2147483649,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 2147483649,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EBX",
+ "cpuid-input-ecx": 0,
+ "cpuid-input-eax": 7,
+ "features": 0
+ },
+ {
+ "cpuid-register": "ECX",
+ "cpuid-input-eax": 1,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 1,
+ "features": 0
+ }
+ ],
+ "id": "libvirt-6"
+}
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-getcpu-filtered.data b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-filtered.data
new file mode 100644
index 0000000..57431e2
--- /dev/null
+++ b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-filtered.data
@@ -0,0 +1,4 @@
+<cpudata arch='x86'>
+ <cpuid function='0x00000001' eax='0x00000000' ebx='0x00000000' ecx='0x00401000' edx='0x00000000'/>
+ <cpuid function='0x00000007' eax='0x00000000' ebx='0x00000fb9' ecx='0x00000000' edx='0x00000000'/>
+</cpudata>
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-getcpu-filtered.json b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-filtered.json
new file mode 100644
index 0000000..13352f9
--- /dev/null
+++ b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-filtered.json
@@ -0,0 +1,46 @@
+{
+ "return": [
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 2147483658,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EAX",
+ "cpuid-input-eax": 1073741825,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 3221225473,
+ "features": 0
+ },
+ {
+ "cpuid-register": "ECX",
+ "cpuid-input-eax": 2147483649,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 2147483649,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EBX",
+ "cpuid-input-ecx": 0,
+ "cpuid-input-eax": 7,
+ "features": 4025
+ },
+ {
+ "cpuid-register": "ECX",
+ "cpuid-input-eax": 1,
+ "features": 4198400
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 1,
+ "features": 0
+ }
+ ],
+ "id": "libvirt-7"
+}
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.data b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.data
new file mode 100644
index 0000000..6e3af3c
--- /dev/null
+++ b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.data
@@ -0,0 +1,4 @@
+<cpudata arch='x86'>
+ <cpuid function='0x00000001' eax='0x00000000' ebx='0x00000000' ecx='0x97ba2223' edx='0x078bfbfd'/>
+ <cpuid function='0x80000001' eax='0x00000000' ebx='0x00000000' ecx='0x00000001' edx='0x28100800'/>
+</cpudata>
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.json b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.json
new file mode 100644
index 0000000..29c00b4
--- /dev/null
+++ b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.json
@@ -0,0 +1,46 @@
+{
+ "return": [
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 2147483658,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EAX",
+ "cpuid-input-eax": 1073741825,
+ "features": 16777275
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 3221225473,
+ "features": 0
+ },
+ {
+ "cpuid-register": "ECX",
+ "cpuid-input-eax": 2147483649,
+ "features": 1
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 2147483649,
+ "features": 672139264
+ },
+ {
+ "cpuid-register": "EBX",
+ "cpuid-input-ecx": 0,
+ "cpuid-input-eax": 7,
+ "features": 0
+ },
+ {
+ "cpuid-register": "ECX",
+ "cpuid-input-eax": 1,
+ "features": 2545558051
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 1,
+ "features": 126614525
+ }
+ ],
+ "id": "libvirt-6"
+}
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.data b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.data
new file mode 100644
index 0000000..bc3087d
--- /dev/null
+++ b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.data
@@ -0,0 +1,5 @@
+<cpudata arch='x86'>
+ <cpuid function='0x00000001' eax='0x00000000' ebx='0x00000000' ecx='0x97ba2223' edx='0x0f8bfbff'/>
+ <cpuid function='0x00000007' eax='0x00000000' ebx='0x00000002' ecx='0x00000000' edx='0x00000000'/>
+ <cpuid function='0x80000001' eax='0x00000000' ebx='0x00000000' ecx='0x00000001' edx='0x2993fbff'/>
+</cpudata>
diff --git a/tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.json b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.json
new file mode 100644
index 0000000..b5fb9f3
--- /dev/null
+++ b/tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.json
@@ -0,0 +1,45 @@
+{
+ "return": [
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 2147483658,
+ "features": 0
+ },
+ {
+ "cpuid-register": "EAX",
+ "cpuid-input-eax": 1073741825,
+ "features": 16777339
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 3221225473,
+ "features": 0
+ },
+ {
+ "cpuid-register": "ECX",
+ "cpuid-input-eax": 2147483649,
+ "features": 1
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 2147483649,
+ "features": 697564159
+ },
+ {
+ "cpuid-register": "EBX",
+ "cpuid-input-ecx": 0,
+ "cpuid-input-eax": 7,
+ "features": 2
+ },
+ {
+ "cpuid-register": "ECX",
+ "cpuid-input-eax": 1,
+ "features": 2545558051
+ },
+ {
+ "cpuid-register": "EDX",
+ "cpuid-input-eax": 1,
+ "features": 260832255
+ }
+ ]
+}
diff --git a/tests/qemumonitorjsontest.c b/tests/qemumonitorjsontest.c
index 9e66059..aec16bb 100644
--- a/tests/qemumonitorjsontest.c
+++ b/tests/qemumonitorjsontest.c
@@ -27,6 +27,7 @@
#include "virthread.h"
#include "virerror.h"
#include "virstring.h"
+#include "cpu/cpu.h"
#define VIR_FROM_THIS VIR_FROM_NONE
@@ -943,6 +944,66 @@ cleanup:
}
+struct testCPUData {
+ const char *name;
+ const char *property;
+ const virDomainXMLOptionPtr xmlopt;
+};
+
+static int
+testQemuMonitorJSONGetCPUData(const void *opaque)
+{
+ const struct testCPUData *data = opaque;
+ qemuMonitorTestPtr test = qemuMonitorTestNew(true, data->xmlopt);
+ virCPUDataPtr cpuData = NULL;
+ char *jsonFile = NULL;
+ char *dataFile = NULL;
+ char *jsonStr = NULL;
+ char *expected = NULL;
+ char *actual = NULL;
+ int ret = -1;
+
+ if (!test)
+ return -1;
+
+ if (virAsprintf(&jsonFile,
+ "%s/qemumonitorjsondata/qemumonitorjson-getcpu-%s.json",
+ abs_srcdir, data->name) < 0 ||
+ virAsprintf(&dataFile,
+ "%s/qemumonitorjsondata/qemumonitorjson-getcpu-%s.data",
+ abs_srcdir, data->name) < 0)
+ goto cleanup;
+
+ if (virtTestLoadFile(jsonFile, &jsonStr) < 0 ||
+ virtTestLoadFile(dataFile, &expected) < 0)
+ goto cleanup;
+
+ if (qemuMonitorTestAddItem(test, "qom-get", jsonStr) < 0)
+ goto cleanup;
+
+ cpuData = qemuMonitorJSONGetCPUData(qemuMonitorTestGetMonitor(test),
+ data->property);
+ if (!cpuData || !(actual = cpuDataFormat(cpuData)))
+ goto cleanup;
+
+ if (STRNEQ(expected, actual)) {
+ virtTestDifference(stderr, expected, actual);
+ goto cleanup;
+ }
+
+ ret = 0;
+cleanup:
+ VIR_FREE(jsonFile);
+ VIR_FREE(dataFile);
+ VIR_FREE(jsonStr);
+ VIR_FREE(expected);
+ VIR_FREE(actual);
+ cpuDataFree(cpuData);
+ qemuMonitorTestFree(test);
+ return ret;
+}
+
+
static int
mymain(void)
{
@@ -964,6 +1025,14 @@ mymain(void)
if (virtTestRun(# name, 1, testQemuMonitorJSON ## name, xmlopt) < 0) \
ret = -1
+#define DO_TEST_CPU_DATA(name, property) \
+ do { \
+ struct testCPUData data = { name, property, xmlopt }; \
+ const char *label = "GetCPU(" property ", " name ")"; \
+ if (virtTestRun(label, 1, testQemuMonitorJSONGetCPUData, &data) < 0)\
+ ret = -1; \
+ } while (0)
+
DO_TEST(GetStatus);
DO_TEST(GetVersion);
DO_TEST(GetMachines);
@@ -978,6 +1047,11 @@ mymain(void)
DO_TEST(SetObjectProperty);
DO_TEST(GetDeviceAliases);
+ DO_TEST_CPU_DATA("host", "feature-words");
+ DO_TEST_CPU_DATA("full", "feature-words");
+ DO_TEST_CPU_DATA("filtered", "filtered-features");
+ DO_TEST_CPU_DATA("empty", "filtered-features");
+
virObjectUnref(xmlopt);
return (ret == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
--
1.8.3.2
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