[Xen-devel][PATCH][VTD]Utilise the snoop control capability in shadow with VT-d code

["Xin, Xiaohui" <xiaohui.xin@xxxxxxxxx>]

The patch attached utilise the snoop control capability in shadow with VT-d code.

We compute the shadow PAT index in leaf page entries now as:

1)       No VT-d assigned: let shadow PAT index as WB, handled already in shadow code before.

2)       direct assigned MMIO area: let shadow code compute the shadow PAT with gMTRR=UC and gPAT value.

3)       Snoop control enable: let shadow PAT index as WB.

4)       Snoop control disable:  let shadow code compute the shadow PAT with gMTRR and gPAT, handled already in shadow code before

 

Signed-off-by: Xin, Xiaohui <xiaohui.xin@xxxxxxxxx>

 

Attachment: shadow_snoop.diff
Description: shadow_snoop.diff

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