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>
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@ -167,10 +167,14 @@ void xen_vcpu_restore(void)
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static void __init xen_banner(void)
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{
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unsigned version = HYPERVISOR_xen_version(XENVER_version, NULL);
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struct xen_extraversion extra;
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HYPERVISOR_xen_version(XENVER_extraversion, &extra);
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printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
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pv_info.name);
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printk(KERN_INFO "Hypervisor signature: %s%s\n",
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xen_start_info->magic,
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printk(KERN_INFO "Xen version: %d.%d%s%s\n",
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version >> 16, version & 0xffff, extra.extraversion,
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xen_feature(XENFEAT_mmu_pt_update_preserve_ad) ? " (preserve-AD)" : "");
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}
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