Re: [PATCH V2 2/6] qemu: Introduce vgamem attribute for video model

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On 14.07.2014 13:20, Wang Rui wrote:
From: Zeng Junliang <zengjunliang@xxxxxxxxxx>

This patch introduces vgamem attribute for video model, and sets
its default value as qemu used. Parse it in two ways accroding to
qemu startup parameters supported: -device or -vga.

Signed-off-by: Zeng Junliang <zengjunliang@xxxxxxxxxx>
Signed-off-by: Wang Rui <moon.wangrui@xxxxxxxxxx>
---
  src/conf/domain_conf.c   | 48 ++++++++++++++++++++++++++++++-
  src/conf/domain_conf.h   |  3 +-
  src/libvirt_private.syms |  1 +
  src/qemu/qemu_command.c  | 75 ++++++++++++++++++++++++++++++++----------------
  4 files changed, 101 insertions(+), 26 deletions(-)

missing docs and RNG schema adjustment. And I'd introduce a new XML to test too.


diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 63d97ec..d5a65c3 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -9328,6 +9328,20 @@ virDomainVideoDefaultRAM(const virDomainDef *def,
      }
  }

+int
+virDomainVideoDefaultVgamem(int type)
+{
+    switch (type) {
+    case VIR_DOMAIN_VIDEO_TYPE_VGA:
+    case VIR_DOMAIN_VIDEO_TYPE_VMVGA:
+    case VIR_DOMAIN_VIDEO_TYPE_QXL:
+        /* QEMU use 16M as default value for vga/vmvga/qxl device*/
+        return 16 * 1024;
+
+    default:
+        return 0;
+    }
+}

  int
  virDomainVideoDefaultType(const virDomainDef *def)
@@ -9413,6 +9427,7 @@ virDomainVideoDefParseXML(xmlNodePtr node,
      char *type = NULL;
      char *heads = NULL;
      char *vram = NULL;
+    char *vgamem = NULL;
      char *ram = NULL;
      char *primary = NULL;

@@ -9422,11 +9437,12 @@ virDomainVideoDefParseXML(xmlNodePtr node,
      cur = node->children;
      while (cur != NULL) {
          if (cur->type == XML_ELEMENT_NODE) {
-            if (!type && !vram && !ram && !heads &&
+            if (!type && !vram && !ram && !heads && !vgamem &&
                  xmlStrEqual(cur->name, BAD_CAST "model")) {
                  type = virXMLPropString(cur, "type");
                  ram = virXMLPropString(cur, "ram");
                  vram = virXMLPropString(cur, "vram");
+                vgamem = virXMLPropString(cur, "vgamem");
                  heads = virXMLPropString(cur, "heads");

                  if ((primary = virXMLPropString(cur, "primary")) != NULL) {
@@ -9490,6 +9506,24 @@ virDomainVideoDefParseXML(xmlNodePtr node,
          def->vram = virDomainVideoDefaultRAM(dom, def->type);
      }

+    if (vgamem) {
+        if (def->type != VIR_DOMAIN_VIDEO_TYPE_VGA &&
+            def->type != VIR_DOMAIN_VIDEO_TYPE_VMVGA &&
+            def->type != VIR_DOMAIN_VIDEO_TYPE_QXL) {
+            virReportError(VIR_ERR_XML_ERROR, "%s",
+                           _("vgamem attribute only supported "
+                             "for type of vga, vmvga and qxl"));
+            goto error;
+        }

Spaces at EOL

+        if (virStrToLong_ui(vgamem, NULL, 10, &def->vgamem) < 0) {
+            virReportError(VIR_ERR_XML_ERROR,
+                           _("cannot parse video vgamem '%s'"), vgamem);
+            goto error;
+        }
+    } else {
+        def->vgamem = virDomainVideoDefaultVgamem(def->type);
+    }
+

And again.


But I'm wondering how's vgamem different to vram. If it covers the same attribute but for different models, I'd vote for keeping already existing attribute name.

Michal

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