[PATCH V4 3/5] cpu: Add helper funtions to parse vendor and model

29 Apr 2020

Add helper functions to parse vendor and model from
xml for ARM arch, and use them as callbacks when
load cpu maps.

Signed-off-by: Zhenyu Zheng <zhengzhenyulixi@gmail.com>
---
 src/cpu/cpu_arm.c | 171 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 170 insertions(+), 1 deletion(-)

diff --git a/src/cpu/cpu_arm.c b/src/cpu/cpu_arm.c
index d8f571cae3..24404eac2c 100644
--- a/src/cpu/cpu_arm.c
+++ b/src/cpu/cpu_arm.c
@@ -206,6 +206,174 @@ virCPUarmMapFeatureParse(xmlXPathContextPtr ctxt
G_GNUC_UNUSED,
     return 0;
 }

+static virCPUarmVendorPtr
+virCPUarmVendorFindByID(virCPUarmMapPtr map,
+                        unsigned long vendor_id)
+{
+    size_t i;
+
+    for (i = 0; i < map->nvendors; i++) {
+        if (map->vendors[i]->value == vendor_id)
+            return map->vendors[i];
+    }
+
+    return NULL;
+}
+
+
+static virCPUarmVendorPtr
+virCPUarmVendorFindByName(virCPUarmMapPtr map,
+                          const char *name)
+{
+    size_t i;
+
+    for (i = 0; i < map->nvendors; i++) {
+        if (STREQ(map->vendors[i]->name, name))
+            return map->vendors[i];
+    }
+
+    return NULL;
+}
+
+
+static int
+virCPUarmVendorParse(xmlXPathContextPtr ctxt,
+               const char *name,
+               void *data)
+{
+    virCPUarmMapPtr map = data;
+    virCPUarmVendorPtr vendor = NULL;
+    int ret = -1;
+
+    if (VIR_ALLOC(vendor) < 0)
+        return ret;
+
+    vendor->name = g_strdup(name);
+
+    if (virCPUarmVendorFindByName(map, vendor->name)) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("CPU vendor %s already defined"),
+                       vendor->name);
+        goto cleanup;
+    }
+
+    if (virXPathULongHex("string(@value)", ctxt, &vendor->value) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "%s", _("Missing CPU vendor value"));
+        goto cleanup;
+    }
+
+    if (virCPUarmVendorFindByID(map, vendor->value)) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("CPU vendor value 0x%2lx already defined"),
+                       vendor->value);
+        goto cleanup;
+    }
+
+    if (VIR_APPEND_ELEMENT(map->vendors, map->nvendors, vendor) < 0)
+        goto cleanup;
+
+    ret = 0;
+
+ cleanup:
+    virCPUarmVendorFree(vendor);
+    return ret;
+
+}
+
+static virCPUarmModelPtr
+virCPUarmModelFind(virCPUarmMapPtr map,
+                   const char *name)
+{
+    size_t i;
+
+    for (i = 0; i < map->nmodels; i++) {
+        if (STREQ(map->models[i]->name, name))
+            return map->models[i];
+    }
+
+    return NULL;
+}
+
+#if defined(__aarch64__)
+static virCPUarmModelPtr
+virCPUarmModelFindByPVR(virCPUarmMapPtr map,
+                        unsigned long pvr)
+{
+    size_t i;
+
+    for (i = 0; i < map->nmodels; i++) {
+        if (map->models[i]->data.pvr == pvr)
+            return map->models[i];
+    }
+
+    return NULL;
+}
+#endif
+
+static int
+virCPUarmModelParse(xmlXPathContextPtr ctxt,
+              const char *name,
+              void *data)
+{
+    virCPUarmMapPtr map = data;
+    virCPUarmModel *model;
+    g_autofree xmlNodePtr *nodes = NULL;
+    g_autofree char *vendor = NULL;
+
+    if (VIR_ALLOC(model) < 0)
+        goto error;
+
+    model->name = g_strdup(name);
+
+    if (virCPUarmModelFind(map, model->name)) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("CPU model %s already defined"),
+                       model->name);
+        goto error;
+    }
+
+    if (virXPathBoolean("boolean(./vendor)", ctxt)) {
+        vendor = virXPathString("string(./vendor/@name)", ctxt);
+        if (!vendor) {
+            virReportError(VIR_ERR_INTERNAL_ERROR,
+                           _("Invalid vendor element in CPU model %s"),
+                           model->name);
+            goto error;
+        }
+
+        if (!(model->vendor = virCPUarmVendorFindByName(map, vendor))) {
+            virReportError(VIR_ERR_INTERNAL_ERROR,
+                           _("Unknown vendor %s referenced by CPU model
%s"),
+                           vendor, model->name);
+            goto error;
+        }
+    }
+
+    if (!virXPathBoolean("boolean(./pvr)", ctxt)) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("Missing PVR information for CPU model %s"),
+                       model->name);
+        goto error;
+    }
+
+    if (virXPathULongHex("string(./pvr/@value)", ctxt, &model->data.pvr) <
0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("Missing or invalid PVR value in CPU model %s"),
+                       model->name);
+        goto error;
+    }
+
+    if (VIR_APPEND_ELEMENT(map->models, map->nmodels, model) < 0)
+        goto error;
+
+    return 0;
+
+ error:
+    virCPUarmModelFree(model);
+    return -1;
+}
+
 static virCPUarmMapPtr
 virCPUarmLoadMap(void)
 {
@@ -213,7 +381,8 @@ virCPUarmLoadMap(void)

     map = virCPUarmMapNew();

-    if (cpuMapLoad("arm", NULL, virCPUarmMapFeatureParse, NULL, map) < 0)
+    if (cpuMapLoad("arm", virCPUarmVendorParse, virCPUarmMapFeatureParse,
+                   virCPUarmModelParse, map) < 0)
         return NULL;

     return g_steal_pointer(&map);
-- 
2.26.2

    

Zhenyu Zheng

Zhenyu Zheng

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