[Xen-devel] [PATCH] xen: issue deprecation warning for 32-bit pv guest

[Juergen Gross <jgross@xxxxxxxx>]

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 <jgross@xxxxxxxx>
---
 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)
-- 
2.16.4


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