[libvirt] [PATCH v2] libxl: Implement basic video device selection
Daniel P. Berrange
berrange at redhat.com
Fri Apr 4 13:17:11 UTC 2014
On Fri, Apr 04, 2014 at 11:36:39AM +0200, Stefan Bader wrote:
> +static int
> +libxlSetBuildGraphics(virDomainDefPtr def, libxl_domain_config *d_config)
> +{
> + libxl_domain_build_info *b_info = &d_config->b_info;
> +
> + /*
> + * Take the first defined video device (graphics card) to display
> + * on the first graphics device (display).
> + * Right now only type and vram info is used and anything beside
> + * type xen and vga is mapped to cirrus.
> + */
> + if (def->nvideos) {
> + unsigned int min_vram = 8 * 1024;
> +
> + switch (def->videos[0]->type) {
> + case VIR_DOMAIN_VIDEO_TYPE_VGA:
> + case VIR_DOMAIN_VIDEO_TYPE_XEN:
> + b_info->u.hvm.vga.kind = LIBXL_VGA_INTERFACE_TYPE_STD;
> + /*
> + * Libxl enforces a minimal VRAM size of 8M when using
> + * LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL or
> + * 16M for LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN.
> + * Avoid build failures and go with the minimum if less
> + * is specified.
> + */
> + switch (b_info->device_model_version) {
> + case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL:
> + min_vram = 8 * 1024;
> + break;
> + case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
> + default:
> + min_vram = 16 * 1024;
> + }
> + break;
> + default:
> + /*
> + * Ignore any other device type and use Cirrus. Again fix
> + * up the minimal VRAM to what libxl expects.
> + */
We shouldn't do that 'default'. For any device type that Xen can't support
we should report VIR_ERR_CONFIG_UNSUPPORTED.
Regards,
Daniel
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