lkml.org 
[lkml]   [2017]   [Jul]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer
On Fri, Jul 21, 2017 at 04:59:09PM +0800, Baoquan He wrote:
> When iommu is pre_enabled in kdump kernel, if a device is set up with
> guest translations (DTE.GV=1), then don't copy GCR3 table root pointer
> but move the device over to an empty guest-cr3 table and handle the
> faults in the PPR log (which answer them with INVALID). After all these
> PPR faults are recoverable for the device and we should not allow the
> device to change old-kernels data when we don't have to.

Okay, forget my previous comment about disabling IOMMUv2 features while
copying. Its done in this patch.

\
 
 \ /
  Last update: 2017-07-27 17:58    [W:0.187 / U:11.312 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site