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Re: [Xen-devel] [PATCH] vt-d: Fix IM bit unmask of Fault Event Control Register in init_vtd_hw().

To: Quan Xu <quan.xu@xxxxxxxxx>
From: Wei Liu <wei.liu2@xxxxxxxxxx>
Date: Fri, 25 Sep 2015 19:57:10 +0100
Cc: yang.z.zhang@xxxxxxxxx, kevin.tian@xxxxxxxxx, wei.liu2@xxxxxxxxxx, jbeulich@xxxxxxxx, xen-devel@xxxxxxxxxxxxx
Delivery-date: Fri, 25 Sep 2015 18:57:27 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Fri, Sep 25, 2015 at 03:22:35PM +0800, Quan Xu wrote:
> Bit 0:29 in Fault Event Control Register are 'Reserved and Preserved',
> software cannot write 0 to it unconditionally. Software must preserve
> the value read for writes.
> 
> Signed-off-by: Quan Xu <quan.xu@xxxxxxxxx>
> Reported-by: Jan Beulich <jbeulich@xxxxxxxx>

Release-acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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References:
- [Xen-devel] [PATCH] vt-d: Fix IM bit unmask of Fault Event Control Register in init_vtd_hw().
  - From: Quan Xu

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