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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>
This commit is contained in:
Jeremy Fitzhardinge 2008-07-15 13:42:34 -07:00 committed by Ingo Molnar
parent 5b664cb235
commit 95c7c23b06
1 changed files with 6 additions and 2 deletions
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8
arch/x86/xen/enlighten.c
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@ -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)" : "");
}