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From: Penny Zheng <Penny.Zheng@arm.com>
To: Julien Grall <julien@xen.org>,
	Bertrand Marquis <Bertrand.Marquis@arm.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>,
	Julien Grall <julien.grall.oss@gmail.com>,
	"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
	Wei Chen <Wei.Chen@arm.com>, nd <nd@arm.com>
Subject: RE: [PATCH 01/10] xen/arm: introduce domain on Static Allocation
Date: Tue, 15 Jun 2021 06:08:00 +0000	[thread overview]
Message-ID: <VE1PR08MB52152038F1366DA9B8A7D3D8F7309@VE1PR08MB5215.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <e3a81b21-fd11-852c-aed7-25e71e4b5539@xen.org>

Hi julien

> -----Original Message-----
> From: Julien Grall <julien@xen.org>
> Sent: Wednesday, June 9, 2021 6:47 PM
> To: Bertrand Marquis <Bertrand.Marquis@arm.com>
> Cc: Stefano Stabellini <sstabellini@kernel.org>; Julien Grall
> <julien.grall.oss@gmail.com>; Penny Zheng <Penny.Zheng@arm.com>; xen-
> devel@lists.xenproject.org; Wei Chen <Wei.Chen@arm.com>; nd
> <nd@arm.com>
> Subject: Re: [PATCH 01/10] xen/arm: introduce domain on Static Allocation
> 
> 
> 
> On 09/06/2021 10:56, Bertrand Marquis wrote:
> > Hi All,
> 
> Hi,
> 
> >> On 7 Jun 2021, at 19:09, Julien Grall <julien@xen.org
> >> <mailto:julien@xen.org>> wrote:
> >> Feel free to propose one. I suggested to use /reserved-memory because
> >> this is the approach that makes the most sense to me (see my reply above).
> >>
> >> TBH, even after your explanation, I am still a bit puzzled into why
> >> /reserved-memory cannot be leveraged to exclude domain region from
> >> the hypervisor allocator.
> >
> > I really tend to think that the original solution from Penny is for
> > now the easiest and simplest to document.
> 
> I can live with Penny's solution so long we don't duplicate the parsing and we
> don't create new datastructure in Xen for the new type of reserved memory.
> However...
> 

Just to confirm what I understand here, you are not only worrying about the duplication code imported in
dt_unreserved_regions, but also must introducing another path in func early_scan_node to parse my first implementation
"xen,static-mem = <...>", right?

On duplication code part, I could think of a way to extract common codes to fix, but for introducing another new path to parse,
FWIT, it is inevitable if not re-using reserved-memory. ;/

> > In the long term, using directly memory and giving in it the address
> > range directly is the most natural solution but that would clash with
> > the current usage for it.
> 
> ... we are already going to have quite some churn to support the system
> device-tree. So I don't want yet another binding to be invented in a few
> months time.
> 
> IOW, the new binding should be a long term solution rather than a temporary
> one to fill the gap until we agree on what you call "domain v2".
> 
> Cheers,
> 
> --

Cheers

Penny
> Julien Grall


  reply	other threads:[~2021-06-15  6:08 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-18  5:21 [PATCH 00/10] Domain on Static Allocation Penny Zheng
2021-05-18  5:21 ` [PATCH 01/10] xen/arm: introduce domain " Penny Zheng
2021-05-18  8:58   ` Julien Grall
2021-05-19  2:22     ` Penny Zheng
2021-05-19 18:27       ` Julien Grall
2021-05-20  6:07         ` Penny Zheng
2021-05-20  8:50           ` Julien Grall
2021-06-02 10:09             ` Penny Zheng
2021-06-03  9:09               ` Julien Grall
2021-06-03 21:32                 ` Stefano Stabellini
2021-06-03 22:07                   ` Julien Grall
2021-06-03 23:55                     ` Stefano Stabellini
2021-06-04  4:00                       ` Penny Zheng
2021-06-05  2:00                         ` Stefano Stabellini
2021-06-07 18:09                       ` Julien Grall
2021-06-09  9:56                         ` Bertrand Marquis
2021-06-09 10:47                           ` Julien Grall
2021-06-15  6:08                             ` Penny Zheng [this message]
2021-06-17 11:22                               ` Julien Grall
2021-05-18  5:21 ` [PATCH 02/10] xen/arm: handle static memory in dt_unreserved_regions Penny Zheng
2021-05-18  9:04   ` Julien Grall
2021-05-18  5:21 ` [PATCH 03/10] xen/arm: introduce PGC_reserved Penny Zheng
2021-05-18  9:45   ` Julien Grall
2021-05-19  3:16     ` Penny Zheng
2021-05-19  9:49       ` Jan Beulich
2021-05-19 19:49         ` Julien Grall
2021-05-20  7:05           ` Jan Beulich
2021-05-19 19:46       ` Julien Grall
2021-05-20  6:19         ` Penny Zheng
2021-05-20  8:40           ` Penny Zheng
2021-05-20  8:59             ` Julien Grall
2021-05-20  9:27               ` Jan Beulich
2021-05-20  9:45                 ` Julien Grall
2021-05-18  5:21 ` [PATCH 04/10] xen/arm: static memory initialization Penny Zheng
2021-05-18  7:15   ` Jan Beulich
2021-05-18  9:51     ` Penny Zheng
2021-05-18 10:43       ` Jan Beulich
2021-05-20  9:04         ` Penny Zheng
2021-05-20  9:32           ` Jan Beulich
2021-05-18 10:00   ` Julien Grall
2021-05-18 10:01     ` Julien Grall
2021-05-19  5:02     ` Penny Zheng
2021-05-18  5:21 ` [PATCH 05/10] xen/arm: introduce alloc_staticmem_pages Penny Zheng
2021-05-18  7:24   ` Jan Beulich
2021-05-18  9:30     ` Penny Zheng
2021-05-18 10:09     ` Julien Grall
2021-05-18 10:15   ` Julien Grall
2021-05-19  5:23     ` Penny Zheng
2021-05-24 10:10       ` Penny Zheng
2021-05-24 10:24         ` Julien Grall
2021-05-18  5:21 ` [PATCH 06/10] xen: replace order with nr_pfns in assign_pages for better compatibility Penny Zheng
2021-05-18  7:27   ` Jan Beulich
2021-05-18  9:11     ` Penny Zheng
2021-05-18 10:20   ` Julien Grall
2021-05-19  5:35     ` Penny Zheng
2021-05-18  5:21 ` [PATCH 07/10] xen/arm: intruduce alloc_domstatic_pages Penny Zheng
2021-05-18  7:34   ` Jan Beulich
2021-05-18  8:57     ` Penny Zheng
2021-05-18 11:23       ` Jan Beulich
2021-05-21  6:41         ` Penny Zheng
2021-05-21  7:09           ` Jan Beulich
2021-06-03  2:44             ` Penny Zheng
2021-05-18 12:13       ` Julien Grall
2021-05-19  7:52         ` Penny Zheng
2021-05-19 20:01           ` Julien Grall
2021-05-18 10:30   ` Julien Grall
2021-05-19  6:03     ` Penny Zheng
2021-05-18  5:21 ` [PATCH 08/10] xen/arm: introduce reserved_page_list Penny Zheng
2021-05-18  7:39   ` Jan Beulich
2021-05-18  8:38     ` Penny Zheng
2021-05-18 11:24       ` Jan Beulich
2021-05-19  6:46         ` Penny Zheng
2021-05-18 11:02   ` Julien Grall
2021-05-19  6:43     ` Penny Zheng
2021-05-18  5:21 ` [PATCH 09/10] xen/arm: parse `xen,static-mem` info during domain construction Penny Zheng
2021-05-18 12:09   ` Julien Grall
2021-05-19  7:58     ` Penny Zheng
2021-05-18  5:21 ` [PATCH 10/10] xen/arm: introduce allocate_static_memory Penny Zheng
2021-05-18 12:05   ` Julien Grall
2021-05-19  7:27     ` Penny Zheng
2021-05-19 20:10       ` Julien Grall
2021-05-20  6:29         ` Penny Zheng

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