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如何判断cpu是否支持二级地址转换SLAT(EPT)

發布時間:2024/1/18 编程问答 32 豆豆
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Windows?8?Consumer?Preview?于2月正式發布,隨后? Windows?Server?8?Beta? 也公布了下載。整體對比,Windows? 8 在硬件方面的要求并不高,其最低硬件需求如下:
  • 處理器:1GHz 或更快
  • 內存:1GB(32-bit)或 2GB(64-bit)
  • 硬盤:16GB(32-bit)或 20GB(64-bit)
  • 顯卡:支持 DX9 或更高級別

????????但是?Windows?8 的一些新功能則需要額外的硬件需求,關注?Windows?8 的朋友們應該知道,在?Windows?8(Client)中也提供了?Hyper-V,它可以被看作是?Windows?Server?8?Hyper-V?Role?的簡化版,這意味著我們將能夠在?Windows?Client?平臺上運行Hyper-V。

????????而要在?Windows?8(Client)上啟用?Hyper-V?則?CPU?必須滿足?SLAT(二級地址轉換,Second?Level?AddressTranslation)的需求!(注意:這是?Hyper-V?特定于?Windows?8?Client?的需求

????????SLAT?在?Windows?Server?8 的?Hyper-V?上則不是必須的,這就解釋了很多網友的疑問:“為什么我的?CPU?在?Windows?8Consumer?Preview?上無法安裝?Hyper-V?!

????????何為?SLAT?呢?

????????在程序訪問內存時都要經過從邏輯地址到物理地址的映射,虛擬環境下也不例外反而更加復雜,因為第一次映射出來的“物理地址”還是虛擬機下的虛擬地址,需要通過虛擬機把它再次映射成實際的物理地址,這樣就限制了訪問的速度。

????????而?SLAT?即“二級地址轉換”,可以加速頁表訪問的速度!在?Intel?和?AMD?處理器上都提供了這一新技術,兩個品牌針對?SLAT這一技術有不同的技術名稱:

  • Intel?的?SLAT?稱為?EPT(Extended?Page?Table),Intel?的?Core?i7,i5,i3,Pentium?G6950 以及大部分的?Xeons?處理器都支持?SLAT,而?Core?2 系列以及更早的處理器則不支持!
  • AMD?的?SLAT?稱為?RVI(Rapid?Virtualzation?Indexing),第三代皓龍處理器(代號:巴塞羅那)都支持這一技術。

????????微軟出品的?CPU?檢測工具!

????????如果無法確認?CPU?型號,那么可以利用微軟?Windows?Sysinternals?出品的?Coreinfo?來進行檢測。Coreinfo?工具使用起來非常簡單,能夠檢測到?CPU?所支持的技術和特性,其中當然就包含了?SLAT?的檢測。

????????下載?Coreinfo:http://technet.microsoft.com/en-us/sysinternals/cc835722

????????Coreinfo?的使用:

????????運行?Coreinfo?需要管理員身份,所以在啟用?UAC?的系統上需要先以管理員身份啟動?CMD,如果只是想檢測?SLAT,只需要運行:

?

coreinfo.exe? –v

?

????????執行效果如下:

?????????gOxiA?使用的是?Intel?Core?i7 處理器,所以在檢測結果中能夠看到當前處理器是支持?EPT?的,也就滿足了?Windows?8?Client上安裝?Hyper-V?的額外需求。下圖是?gOxiA?早期測試?Windows?8(Client)Hyper-V?時的截圖,供大家參考!


?

?AMD Processors with Rapid Virtualization Indexing Required to Run Hyper-V in Windows? 8?

  • Back
Last Updated 9/13/2011???
?
Article Number GPU-120?
?

This article provides a list of AMD processors that support AMD Virtualization? (AMD-V?) Technology with Rapid Virtualization Indexing (RVI), also known as nested page tables or Second Level Address Translation (SLAT) necessary to support Hyper-V virtualization technology in Microsoft? Windows? 8.

???

Codename

CPUID family

CPU / APU Brand Name

Llano

12h

AMD A-Series Series of Products

Sargas

10h

AMD Athlon? II Series of Products

Champlain

10h

AMD Athlon II Dual-Core Mobile Series of Products

Geneva

0Fh

AMD Athlon II Neo Series of Products

?

?

AMD Athlon II Neo Dual-Core Mobile Series of Products

?

?

AMD Athlon II Neo Mobile Series of Products

Regor

10h

AMD Athlon II X2 Series of Products

Rana

10h

AMD Athlon II X3 Series of Products

Propus

10h

AMD Athlon II X4 Series of Products

?

?

AMD Athlon II XLT Series of Products

Kuma

10h

AMD Athlon X2 Series of Products

?

?

AMD Athlon X2 Series of Products

Ontario

14h

AMD C-Series Series of Products

Zacate

14h

AMD E-Series Series of Products

?

?

AMD G-Series Series of Products

?

?

AMD G-Series Series of Products

?

?

AMD Phenom? II Dual-Core Mobile Series of Products

?

?

AMD Phenom II Quad-Core Mobile Series of Products

?

?

AMD Phenom II Triple-Core Mobile Series of Products

Callisto

10h

AMD Phenom II X2 Series of Products

Heka

10h

AMD Phenom II X3 Series of Products

Deneb

10h

AMD Phenom II X4 Series of Products

Zosma

10h

AMD Phenom II X4 Series of Products

Thuban

10h

AMD Phenom II X6 Series of Products

?

?

AMD Phenom II XLT Series of Products

Agena

10h

AMD Phenom X4 Series of Products

?

?

AMD Sempron? Series of Products

?

?

AMD Sempron Mobile Series of Products

?

?

AMD Sempron X2 Series of Products

Istanbul

10h

AMD Six-Core Opteron? Series of Products

Barcelona

10h

AMD Third Generation Opteron Series of Products

Budapest

10h

AMD Third Generation Opteron Series of Products

Shanghai

10h

AMD Third Generation Opteron Series of Products

Suzuka

10h

AMD Third Generation Opteron Series of Products

?

?

AMD Turion? II Dual-Core Mobile Series of Products

?

?

AMD Turion II Neo Series of Products

?

?

AMD Turion II Neo Dual-Core Mobile Series of Products

?

?

AMD V Series for Notebook PCs Series of Products

?

?

AMD V Series for Notebook PCs Series of Products

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