On 10/25/19 3:38 AM, Juergen Gross wrote:
> Support for the kernel as Xen 32-bit PV guest will soon be removed.
> Issue a warning when booted as such.
>
> Signed-off-by: Juergen Gross <[email protected]>

Reviewed-by: Boris Ostrovsky <[email protected]>

> ---
>  arch/x86/xen/enlighten_pv.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
> index 58f79ab32358..5bfea374a160 100644
> --- a/arch/x86/xen/enlighten_pv.c
> +++ b/arch/x86/xen/enlighten_pv.c
> @@ -117,6 +117,14 @@ static void __init xen_banner(void)
>       printk(KERN_INFO "Xen version: %d.%d%s%s\n",
>              version >> 16, version & 0xffff, extra.extraversion,
>              xen_feature(XENFEAT_mmu_pt_update_preserve_ad) ? " 
> (preserve-AD)" : "");
> +
> +#ifdef CONFIG_X86_32
> +     pr_warn("WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! 
> WARNING!\n"
> +             "Support for running as 32-bit PV-guest under Xen will soon be 
> removed\n"
> +             "from the Linux kernel!\n"
> +             "Please use either a 64-bit kernel or switch to HVM or PVH 
> mode!\n"
> +             "WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! 
> WARNING!\n");
> +#endif
>  }
>  
>  static void __init xen_pv_init_platform(void)


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