From: Cliff Wickman <cpw@sgi.com>
Date: Wed, 14 May 2014 21:15:47 +0000 (-0500)
Subject: x86/uv: Update the UV3 TLB shootdown logic
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~170^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a26fd71953711acb4884df84e393d52de57e4f17;p=pandora-kernel.git

x86/uv: Update the UV3 TLB shootdown logic

Update of TLB shootdown code for UV3.

Kernel function native_flush_tlb_others() calls
uv_flush_tlb_others() on UV to invalidate tlb page definitions
on remote cpus. The UV systems have a hardware 'broadcast assist
unit' which can be used to broadcast shootdown messages to all
cpu's of selected nodes.

The behavior of the BAU has changed only slightly with UV3:

  - UV3 is recognized with is_uv3_hub().
  - UV2 functions and structures (uv2_xxx) are in most cases
    simply renamed to uv2_3_xxx.
  - Some UV2 error workarounds are not needed for UV3.
    (see uv_bau_message_interrupt and enable_timeouts)

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/E1WkgWh-0001yJ-3K@eag09.americas.sgi.com
[ Removed a few linebreak uglies. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

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