>> diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index
>> cecdb1b..0ebae4c 100644 --- a/drivers/kvm/kvm_main.c +++
>> b/drivers/kvm/kvm_main.c @@ -1080,14 +1080,19 @@ static int
>> emulator_read_emulated(unsigned long addr, memcpy(val,
>> vcpu->mmio_data, bytes); vcpu->mmio_read_completed = 0; return
>> X86EMUL_CONTINUE; - } else if (emulator_read_std(addr, val, bytes,
>> vcpu) - == X86EMUL_CONTINUE) - return X86EMUL_CONTINUE; + } gpa =
>> vcpu->mmu.gva_to_gpa(vcpu, addr); + if ((gpa & PAGE_MASK) ==
>> 0xfee00000) + goto mmio; +
> 
> The guest can change the apic base address.  Different vcpus can have
> different addresses. 
> 

In theory yes. But we didn't observe this so far. Xen with this feature
with same assumption
works for quit a long time. 
Also given that we are using global shadow page table, so probably we
have to
take this assumption :-)
thx,eddie

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