Re: [PATCH v4 3/4] tools: add tools support for Intel CDP

[Ian Campbell <ian.campbell@citrix.com>]

On Thu, 2015-09-17 at 17:35 +0800, He Chen wrote:
> diff --git a/tools/libxl/libxl_psr.c b/tools/libxl/libxl_psr.c
> index 3378239..62963cf 100644
> --- a/tools/libxl/libxl_psr.c
> +++ b/tools/libxl/libxl_psr.c
> @@ -87,6 +87,9 @@ static void libxl__psr_cat_log_err_msg(libxl__gc *gc,
> int err)
>      case EEXIST:
>          msg = "The same CBM is already set to this domain";
>          break;
> +    case EINVAL:
> +        msg = "Unable to set code or data CBM when CDP is disabled";
> +        break;

These overloading of the errno values are getting a bit thinly stretched.
The more so that EINVAL has a widely used more generic meaning.

Hypervisor maintainers, what is your opinion of this?

Since this is a sysctl I suppose we could consider adding a new PSR
specific error type with appropriate codes?