Re: [Xen-devel] [PATCH for-4.9] x86/vmx: Shorten vmx_{get, set}_segment_register() for user segments

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 17/11/16 05:10, Tian, Kevin wrote:
>> From: Andrew Cooper [mailto:andrew.cooper3@xxxxxxxxxx]
>> Sent: Wednesday, November 16, 2016 9:42 PM
>>
>> On 26/10/16 14:15, Andrew Cooper wrote:
>>> The x86_segment enumeration matches hardware SReg encoding, which can be 
>>> used
>>> to calculate the appropriate VMCS fields, rather than open coding every
>>> instance.
>>>
>>> This reduces the size of the switch statement, and the number of embedded 
>>> BUG
>>> frames from the __vm{read,write}() calls.  In the unlikely case that a call
>>> does fault, the field can unambiguously be retrieved from the GPR state
>>> printed.
>>>
>>> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
>>> ---
>>> CC: Jan Beulich <JBeulich@xxxxxxxx>
>>> CC: Jun Nakajima <jun.nakajima@xxxxxxxxx>
>>> CC: Kevin Tian <kevin.tian@xxxxxxxxx>
>> Intel: Ping?
> Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>

Thanks.  Queued for 4.9.

~Andrew

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