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[Xen-devel] vmcs_revision_id: do we care?
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] vmcs_revision_id: do we care? |
| From: | Daniel Li <dli@xxxxxxxxxxxxxxx> |
| Date: | Tue, 08 Jan 2008 17:40:17 -0500 |
| Delivery-date: | Tue, 08 Jan 2008 14:40:56 -0800 |
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Right now when xen finds out a SMP host has processors with different
vmcs_revision_id, it considers it a bug.
xen/arch/x86/hvm/vmx/vmcs.c:vmx_init_vmcs_config():
rdmsr(MSR_IA32_VMX_BASIC_MSR, vmx_msr_low, vmx_msr_high);
if ( smp_processor_id() == 0 )
{
vmcs_revision_id = vmx_msr_low;
}
else
{
BUG_ON(vmcs_revision_id != vmx_msr_low);
}
Does anyone know why are we doing this? Can we change that check into a
warning message?
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