From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Tue, 15 Jul 2008 20:42:34 +0000 (-0700)
Subject: xen: report hypervisor version
X-Git-Tag: v2.6.27-rc1~955^2~1^19~1
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=95c7c23b06bc92f1772b9c9460845f179ba8c39e;p=linux-2.6-omap-h63xx.git

xen: report hypervisor version

Various versions of the hypervisor have differences in what ABIs and
features they support.  Print some details into the boot log to help
with remote debugging.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index bb508456ef5..5328e46d9cf 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -167,10 +167,14 @@ void xen_vcpu_restore(void)
 
 static void __init xen_banner(void)
 {
+	unsigned version = HYPERVISOR_xen_version(XENVER_version, NULL);
+	struct xen_extraversion extra;
+	HYPERVISOR_xen_version(XENVER_extraversion, &extra);
+
 	printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
 	       pv_info.name);
-	printk(KERN_INFO "Hypervisor signature: %s%s\n",
-	       xen_start_info->magic,
+	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)" : "");
 }