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Re: [PATCH v10 02/13] x86/mm: switch to new APIs in map_pages_to_xen

To: Hongyan Xia <hx242@xxxxxxx>
From: Jan Beulich <jbeulich@xxxxxxxx>
Date: Thu, 22 Apr 2021 14:01:33 +0200
Cc: jgrall@xxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
Delivery-date: Thu, 22 Apr 2021 12:01:41 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 21.04.2021 16:15, Hongyan Xia wrote:
> From: Wei Liu <wei.liu2@xxxxxxxxxx>
> 
> Page tables allocated in that function should be mapped and unmapped
> now.
> 
> Take the opportunity to avoid a potential double map in
> map_pages_to_xen() by initialising pl1e to NULL and only map it if it
> was not mapped earlier.
> 
> Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> Signed-off-by: Hongyan Xia <hongyxia@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

References:
- [PATCH v10 00/13] switch to domheap for Xen page tables
  - From: Hongyan Xia
- [PATCH v10 02/13] x86/mm: switch to new APIs in map_pages_to_xen
  - From: Hongyan Xia

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