[Xen-devel] [PATCH v8] tools/libxl: Add qxl vga interface support for upstream-qemu-xen.

[Fabio Fantoni <fantonifabio@xxxxxxxxxx>]

tools/libxl: Add qxl vga interface support for
 upstream-qemu-xen.

Usage:
  qxl=1|0

Changes from v7:
- Fix videoram settings parameters for qemu.

Signed-off-by: Fabio Fantoni <fabio.fantoni@xxxxxxxxxx>
Signed-off-by: Zhou Peng <zpengxen@xxxxxxxxx>
---
 docs/man/xl.cfg.pod.5       |   11 +++++++++++
 tools/libxl/libxl_create.c  |   12 ++++++++++++
 tools/libxl/libxl_dm.c      |   15 +++++++++++++++
 tools/libxl/libxl_types.idl |    1 +
 tools/libxl/xl_cmdimpl.c    |    7 ++++++-
 5 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5
index 9c5cdcd..a0f0dc3 100644
--- a/docs/man/xl.cfg.pod.5
+++ b/docs/man/xl.cfg.pod.5
@@ -984,6 +984,9 @@ the amount of video ram is fixed at 4MB which is 
sufficient
 for 1024x768 at 32 bpp and videoram option is currently working
 only when using the upstream qemu-xen device-model.

+For B<qxl> vga, the default is both default and minimal 128MB.
+If B<videoram> is set less than 128MB, an error will be triggered.
+
 =item B<stdvga=BOOLEAN>

 Select a standard VGA card with VBE (VESA BIOS Extensions) as the
@@ -992,6 +995,14 @@ a Cirrus Logic GD5446 VGA card. If your guest 
supports VBE 2.0 or
 later (e.g. Windows XP onwards) then you should enable this.
 stdvga supports more video ram and bigger resolutions than Cirrus.

+=item B<qxl=BOOLEAN>
+
+Select a QXL VGA card as the emulated graphics device.
+In general, QXL should work with the Spice remote display protocol
+for acceleration, and QXL driver is necessary in guest in this case.
+QXL can also work with the VNC protocol, but it will be like a standard
+VGA without acceleration.
+
 =item B<vnc=BOOLEAN>

 Allow access to the display via the VNC protocol.  This enables the
diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 55014e5..4761b5a 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -197,6 +197,18 @@ int libxl__domain_build_info_setdefault(libxl__gc *gc,
     case LIBXL_DOMAIN_TYPE_HVM:
         if (b_info->shadow_memkb == LIBXL_MEMKB_DEFAULT)
             b_info->shadow_memkb = 0;
+
+        if (b_info->device_model_version == 
LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN
+            && b_info->u.hvm.vga.kind == LIBXL_VGA_INTERFACE_TYPE_QXL) {
+            if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT) {
+                b_info->video_memkb = (128 * 1024);
+            }else if (b_info->video_memkb < (128 * 1024)) {
+                LIBXL__LOG(CTX, LIBXL__LOG_ERROR,
+                    "128 Mib videoram is the minimum for qxl default");
+                return ERROR_INVAL;
+            }
+        }
+
         if (b_info->video_memkb == LIBXL_MEMKB_DEFAULT)
             b_info->video_memkb = 8 * 1024;
         else if (b_info->video_memkb < 8192){
diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index 465b1fd..0813258 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -181,6 +181,8 @@ static char ** 
libxl__build_device_model_args_old(libxl__gc *gc,
             break;
         case LIBXL_VGA_INTERFACE_TYPE_CIRRUS:
             break;
+        case LIBXL_VGA_INTERFACE_TYPE_QXL:
+            break;
         }

         if (b_info->u.hvm.boot) {
@@ -437,6 +439,19 @@ static char ** 
libxl__build_device_model_args_new(libxl__gc *gc,
                 NULL);
             }
             break;
+        case LIBXL_VGA_INTERFACE_TYPE_QXL:
+            flexarray_vappend(dm_args, "-vga", "qxl", NULL);
+            if (b_info->video_memkb) {
+                flexarray_vappend(dm_args, "-global",
+                libxl__sprintf(gc, "qxl-vga.vram_size_mb=%lu",
+                (b_info->video_memkb/2/1024)),
+                NULL);
+                flexarray_vappend(dm_args, "-global",
+                libxl__sprintf(gc, "qxl-vga.ram_size_mb=%lu",
+                (b_info->video_memkb/2/1024)),
+                NULL);
+            }
+            break;
         }

         if (b_info->u.hvm.boot) {
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index acc4bc9..3f90f12 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -130,6 +130,7 @@ libxl_shutdown_reason = Enumeration("shutdown_reason", [
 libxl_vga_interface_type = Enumeration("vga_interface_type", [
     (1, "CIRRUS"),
     (2, "STD"),
+    (3, "QXL"),
     ], init_val = 0)

 #
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 080bbd8..b4f7a0e 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -1469,7 +1469,12 @@ skip_vfb:
 #undef parse_extra_args

     if (c_info->type == LIBXL_DOMAIN_TYPE_HVM) {
-        if (!xlu_cfg_get_long(config, "stdvga", &l, 0))
+        if (!xlu_cfg_get_long(config, "qxl", &l, 0))
+            b_info->u.hvm.vga.kind = l ? LIBXL_VGA_INTERFACE_TYPE_QXL :
+ LIBXL_VGA_INTERFACE_TYPE_CIRRUS;
+
+        if (!xlu_cfg_get_long(config, "stdvga", &l, 0) &&
+            b_info->u.hvm.vga.kind != LIBXL_VGA_INTERFACE_TYPE_QXL)
             b_info->u.hvm.vga.kind = l ? LIBXL_VGA_INTERFACE_TYPE_STD :
LIBXL_VGA_INTERFACE_TYPE_CIRRUS;

--
1.7.9.5

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