Re: [Qemu-devel] [PATCH] KVM: emulate lapic tsc deadline timer for hvm

[Liu, Jinsong]

Avi Kivity wrote:
>> 
>> --- a/arch/x86/include/asm/msr-index.h
>> +++ b/arch/x86/include/asm/msr-index.h
>> @@ -229,6 +229,8 @@
>>   #define MSR_IA32_APICBASE_ENABLE   (1<<11)
>>   #define MSR_IA32_APICBASE_BASE             (0xfffff<<12)
>> 
>> +#define MSR_IA32_TSCDEADLINE                0x000006e0
>> +
>>   #define MSR_IA32_UCODE_WRITE               0x00000079
>>   #define MSR_IA32_UCODE_REV         0x0000008b
>> 
> 
> Need to add to msrs_to_save so live migration works.
> 

2 questions:
1). how about add to emulated_msrs instead of msrs_to_save? msrs_to_save 
modified at runtime and depend on capacibility of host cpu.
2). do we need add code at qemu (kvm_get_msrs/ kvm_put_msrs) to expose 
MSR_IA32_TSCDEADLINE to userspace?

Thanks,
Jinsong