Re: [Xen-devel] [PATCH XTF v2 4/4] xtf: Add monitor mem_access test

[Tamas K Lengyel <tamas.k.lengyel@xxxxxxxxx>]

> +static int mem_access_init()
> +{
> +    int rc = 0;
> +    mem_access_monitor_t *pmon = (mem_access_monitor_t *)monitor;
> +
> +    if ( !pmon )
> +        return -EINVAL;
> +
> +    rc = xc_domain_set_access_required(monitor->xch, monitor->domain_id, 1);
> +    if ( rc < 0 )
> +    {
> +        XTF_MON_ERROR("Error %d setting mem_access listener required\n", rc);
> +        return rc;
> +    }
> +
> +    pmon->gfn = xc_translate_foreign_address(monitor->xch, 
> monitor->domain_id,
> +                                             0, pmon->address);

Check that the gfn returned is not 0 before continuing.

> +
> +    rc = xc_set_mem_access(monitor->xch, monitor->domain_id, 
> XENMEM_access_rw,
> +                           pmon->gfn, 1);
> +    if ( rc < 0 )
> +    {
> +        XTF_MON_ERROR("Error %d setting memory access!\n", rc);
> +        return rc;
> +    }
> +
> +    return 0;
> +}

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