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Add various constants for the PAT MSR and the PAT PTE and PDE flags.
rS158238Unpublished

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Description

Add various constants for the PAT MSR and the PAT PTE and PDE flags.
Initialize the PAT MSR during boot to map PAT type 2 to Write-Combining
(WC) instead of Uncached (UC-).

MFC after: 1 month

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Provenance
jhbAuthored on
Parents
rS158237: Break out socket access control and delivery logic from udp6_input()
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