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From: Wei Liu <wei.liu2@citrix.com>
To: Oleksandr Tyshchenko <olekstysh@gmail.com>
Cc: Wei Liu <wei.liu2@citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>,
	Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>,
	Julien Grall <julien.grall@arm.com>,
	Jan Beulich <jbeulich@suse.com>,
	xen-devel@lists.xenproject.org
Subject: Re: [PATCH v2 09/13] xen/arm: Add use_iommu flag to xen_arch_domainconfig
Date: Fri, 28 Jul 2017 17:16:30 +0100	[thread overview]
Message-ID: <20170728161630.2yhxntxcbcv4zqqt@citrix.com> (raw)
In-Reply-To: <1501003615-15274-10-git-send-email-olekstysh@gmail.com>

On Tue, Jul 25, 2017 at 08:26:51PM +0300, Oleksandr Tyshchenko wrote:
> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
> 
> This flag is intended to let Xen know that the guest has devices
> which will most likely be used for passthrough and as the result
> the IOMMU is expected to be used for this domain.
> 
> The primary aim of this knowledge is to help the IOMMUs that don't
> share page tables with the CPU on ARM be ready before P2M code starts
> updating IOMMU mapping.
> So, if this flag is set the non-shared IOMMUs will populate
> their page tables at the domain creation time and thereby will be able
> to handle IOMMU mapping updates from *the very beginning*.
> 
> In order to retain the current behavior for x86 still call
> iommu_domain_init() with use_iommu flag being forced to false.
> 
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
> CC: Jan Beulich <jbeulich@suse.com>
> CC: Julien Grall <julien.grall@arm.com>
> CC: Ian Jackson <ian.jackson@eu.citrix.com>
> CC: Wei Liu <wei.liu2@citrix.com>
> 
> ---
>    Changes in V1:
>       - Treat use_iommu flag as the ARM decision only. Don't use
>         common domain creation flag for it, use ARM config instead.
>       - Clarify patch subject/description.
> 
>    Changes in V2:
>       - Cosmetic fixes.
> ---
>  tools/libxl/libxl_arm.c       | 8 ++++++++

Acked-by: Wei Liu <wei.liu2@citrix.com>

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  reply	other threads:[~2017-07-28 16:16 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-25 17:26 [PATCH v2 00/13] "Non-shared" IOMMU support on ARM Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 01/13] xen/device-tree: Add dt_count_phandle_with_args helper Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 02/13] iommu: Add extra order argument to the IOMMU APIs and platform callbacks Oleksandr Tyshchenko
2017-08-03 11:21   ` Julien Grall
2017-08-03 12:32     ` Oleksandr Tyshchenko
2017-08-21 16:20       ` Oleksandr Tyshchenko
2017-08-22  7:21         ` Jan Beulich
2017-08-22 10:28           ` Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 03/13] xen/arm: p2m: Add helper to convert p2m type to IOMMU flags Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 04/13] xen/arm: p2m: Update IOMMU mapping whenever possible if page table is not shared Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 05/13] iommu/arm: Re-define iommu_use_hap_pt(d) as iommu_hap_pt_share Oleksandr Tyshchenko
2017-08-03 11:23   ` Julien Grall
2017-08-03 12:33     ` Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 06/13] iommu: Add extra use_iommu argument to iommu_domain_init() Oleksandr Tyshchenko
2017-08-21 16:29   ` Oleksandr Tyshchenko
2017-12-06 16:51   ` Jan Beulich
2017-12-06 19:53     ` Oleksandr Tyshchenko
2017-12-06 22:49       ` Julien Grall
2017-12-07 12:08         ` Oleksandr Tyshchenko
2017-12-07 12:51           ` Jan Beulich
2017-07-25 17:26 ` [PATCH v2 07/13] iommu: Make decision about needing IOMMU for hardware domains in advance Oleksandr Tyshchenko
2017-08-21 16:30   ` Oleksandr Tyshchenko
2017-12-06 17:01   ` Jan Beulich
2017-12-06 19:23     ` Oleksandr Tyshchenko
2017-12-07  8:57       ` Jan Beulich
2017-12-07 13:50         ` Oleksandr Tyshchenko
2017-12-07 13:57           ` Jan Beulich
2017-12-08 12:28             ` Oleksandr Tyshchenko
2018-01-18 12:09   ` Roger Pau Monné
2018-01-18 14:50     ` Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 08/13] iommu/arm: Misc fixes for arch specific part Oleksandr Tyshchenko
2017-08-03 11:31   ` Julien Grall
2017-08-03 12:34     ` Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 09/13] xen/arm: Add use_iommu flag to xen_arch_domainconfig Oleksandr Tyshchenko
2017-07-28 16:16   ` Wei Liu [this message]
2017-07-28 16:30     ` Oleksandr Tyshchenko
2017-08-03 11:33   ` Julien Grall
2017-08-03 12:31     ` Oleksandr Tyshchenko
2017-08-03 12:35       ` Julien Grall
2017-07-25 17:26 ` [PATCH v2 10/13] xen/arm: domain_build: Don't expose IOMMU specific properties to the guest Oleksandr Tyshchenko
2017-08-03 11:37   ` Julien Grall
2017-08-03 13:24     ` Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 11/13] iommu/arm: smmu: Squash map_pages/unmap_pages with map_page/unmap_page Oleksandr Tyshchenko
2017-08-03 12:36   ` Julien Grall
2017-08-03 13:26     ` Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 12/13] [RFC] iommu: VT-d: " Oleksandr Tyshchenko
2017-08-21 16:44   ` Oleksandr Tyshchenko
2017-09-12 14:44     ` Oleksandr Tyshchenko
2017-09-20  8:54       ` Tian, Kevin
2017-09-20 18:23         ` Oleksandr Tyshchenko
2017-07-25 17:26 ` [PATCH v2 13/13] [RFC] iommu: AMD-Vi: " Oleksandr Tyshchenko
2017-08-21 16:44   ` Oleksandr Tyshchenko
2017-09-12 14:45     ` Oleksandr Tyshchenko
2017-07-31  5:57 ` [PATCH v2 00/13] "Non-shared" IOMMU support on ARM Tian, Kevin
2017-07-31 11:57   ` Oleksandr Tyshchenko
2017-08-01  3:06     ` Tian, Kevin
2017-08-01 11:08       ` Oleksandr Tyshchenko
2017-08-02  6:12         ` Tian, Kevin
2017-08-02 17:47           ` Oleksandr Tyshchenko
2017-08-01 18:09       ` Julien Grall
2017-08-01 18:20         ` Oleksandr Tyshchenko
2017-08-01 17:56   ` Julien Grall

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