From: Julien Grall <julien.grall@linaro.org>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: xen-devel@lists.xenproject.org, tim@xen.org,
ian.campbell@citrix.com, stefano.stabellini@citrix.com
Subject: Re: [PATCH v2 19/21] xen/arm: Reserve region in guest memory for device passthrough
Date: Wed, 06 Aug 2014 17:33:04 +0100 [thread overview]
Message-ID: <53E258C0.7000902@linaro.org> (raw)
In-Reply-To: <alpine.DEB.2.02.1408061727050.2293@kaball.uk.xensource.com>
Hi Stefano,
On 08/06/2014 05:27 PM, Stefano Stabellini wrote:
> On Thu, 31 Jul 2014, Julien Grall wrote:
>> This region will be split by the toolstack to allocate MMIO range for eac
>> device.
>>
>> For now only reserve a 768MB region, this should be enought to passthrough
>> multiple device at the same time.
>>
>> Signed-off-by: Julien Grall <julien.grall@linaro.org>
>>
>> ---
>>
>> I can't allocate easily a range of 1GB in the current layout without shrink
>> the first RAM bank. So I decided to use only 768MB. If in the future we need
>> more, then we will have to choose at runtime the guest layout.
>>
>> Changes in v2:
>> - Bump the reserved region from 512MB to 768MB
>
>
> Better than nothing.
> Would it be possible to add a second region > 4GB? Maybe after RAM?
> How hard would be to handle that?
It won't work if the guest is using short-descriptor translation table
format because only 32 bits address will be supported.
Regards,
--
Julien Grall
next prev parent reply other threads:[~2014-08-06 16:33 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-31 15:00 [PATCH v2 00/21] xen/arm: Add support for non-pci passthrough Julien Grall
2014-07-31 15:00 ` [PATCH v2 01/21] xen/common: do not implicitly permit access to mapped I/O memory Julien Grall
2014-07-31 15:22 ` Julien Grall
2014-07-31 15:00 ` [PATCH v2 02/21] xen: guestcopy: Provide an helper to safely copy string from guest Julien Grall
2014-08-01 8:40 ` Jan Beulich
2014-08-06 14:18 ` Julien Grall
2014-09-09 12:52 ` Ian Campbell
2014-09-09 13:17 ` Jan Beulich
2014-09-09 13:40 ` Ian Campbell
2014-08-06 13:56 ` Stefano Stabellini
2014-08-06 14:22 ` Julien Grall
2014-08-06 16:06 ` Daniel De Graaf
2014-07-31 15:00 ` [PATCH v2 03/21] xen/arm: vgic: Rename nr_lines into nr_spis Julien Grall
2014-08-06 13:58 ` Stefano Stabellini
2014-07-31 15:00 ` [PATCH v2 04/21] xen/arm: vgic: Introduce a function to initialize pending_irq Julien Grall
2014-08-06 14:06 ` Stefano Stabellini
2014-08-06 14:52 ` Julien Grall
2014-08-06 14:57 ` Stefano Stabellini
2014-07-31 15:00 ` [PATCH v2 05/21] xen/arm: follow-up to allow DOM0 manage IRQ and MMIO Julien Grall
2014-09-09 13:07 ` Ian Campbell
2014-09-11 22:32 ` Julien Grall
2014-09-12 10:13 ` Ian Campbell
2014-09-12 19:04 ` Julien Grall
2014-07-31 15:00 ` [PATCH v2 06/21] xen/arm: Allow virq != irq Julien Grall
2014-08-06 14:50 ` Stefano Stabellini
2014-08-06 15:07 ` Julien Grall
2014-08-06 16:48 ` Stefano Stabellini
2014-09-09 13:29 ` Ian Campbell
2014-09-09 18:42 ` Julien Grall
2014-09-11 22:50 ` Julien Grall
2014-09-12 10:13 ` Ian Campbell
2014-09-12 10:19 ` Ian Campbell
2014-07-31 15:00 ` [PATCH v2 07/21] xen/arm: route_irq_to_guest: Check validity of the IRQ Julien Grall
2014-08-06 14:56 ` Stefano Stabellini
2014-07-31 15:00 ` [PATCH v2 08/21] xen/arm: Initialize the virtual GIC later Julien Grall
2014-08-06 15:35 ` Stefano Stabellini
2014-09-09 13:35 ` Ian Campbell
2014-09-09 18:57 ` Julien Grall
2014-09-10 10:08 ` Ian Campbell
2014-09-11 23:01 ` Julien Grall
2014-09-12 10:14 ` Ian Campbell
2014-08-06 17:06 ` Daniel De Graaf
2014-08-29 13:09 ` Andrii Tseglytskyi
2014-08-29 18:57 ` Julien Grall
2014-08-29 19:49 ` Andrii Tseglytskyi
2014-08-29 20:04 ` Julien Grall
2014-08-29 20:14 ` Andrii Tseglytskyi
2014-09-09 13:33 ` Ian Campbell
2014-09-09 19:11 ` Julien Grall
2014-09-10 9:45 ` Andrii Tseglytskyi
2014-09-09 13:37 ` Ian Campbell
[not found] ` <CAAHg+HhhsZonrEDdHET93dy=dR1+YF-VPGJ=VwB20RRxWqdSYA@mail.gmail.com>
2014-10-06 16:04 ` Julien Grall
2014-07-31 15:00 ` [PATCH v2 09/21] xen/arm: Release IRQ routed to a domain when it's destroying Julien Grall
2014-08-06 15:49 ` Stefano Stabellini
2014-08-06 16:01 ` Julien Grall
2014-08-06 16:53 ` Stefano Stabellini
2014-08-06 17:09 ` Julien Grall
2014-08-07 15:36 ` Stefano Stabellini
2014-08-07 15:40 ` Julien Grall
2014-08-07 16:31 ` Stefano Stabellini
2014-08-07 16:35 ` Julien Grall
2014-08-07 16:39 ` Stefano Stabellini
2014-09-09 13:53 ` Ian Campbell
2014-09-09 22:29 ` Stefano Stabellini
2014-07-31 15:00 ` [PATCH v2 10/21] xen/arm: Implement hypercall PHYSDEVOP_{, un}map_pirq Julien Grall
2014-08-06 16:10 ` Stefano Stabellini
2014-08-29 12:34 ` Andrii Tseglytskyi
2014-08-29 19:08 ` Julien Grall
2014-08-29 19:44 ` Andrii Tseglytskyi
2014-07-31 15:00 ` [PATCH v2 11/21] xen/dts: Use unsigned int for MMIO and IRQ index Julien Grall
2014-08-06 16:12 ` Stefano Stabellini
2014-07-31 15:00 ` [PATCH v2 12/21] xen/dts: Provide an helper to get a DT node from a path provided by a guest Julien Grall
2014-09-09 13:55 ` Ian Campbell
2014-07-31 15:00 ` [PATCH v2 13/21] xen/dts: Add hypercalls to retrieve device node information Julien Grall
2014-08-01 8:50 ` Jan Beulich
2014-08-06 15:17 ` Julien Grall
2014-08-06 15:47 ` Jan Beulich
2014-07-31 15:00 ` [PATCH v2 14/21] xen/passthrough: Introduce iommu_construct Julien Grall
2014-08-01 8:55 ` Jan Beulich
2014-07-31 15:00 ` [PATCH v2 15/21] xen/passthrough: Call arch_iommu_domain_destroy before calling iommu_teardown Julien Grall
2014-08-01 9:00 ` Jan Beulich
2014-07-31 15:00 ` [PATCH v2 16/21] xen/passthrough: iommu_deassign_device_dt: By default reassign device to nobody Julien Grall
2014-08-06 16:23 ` Stefano Stabellini
2015-01-12 16:33 ` Julien Grall
2014-07-31 15:00 ` [PATCH v2 17/21] xen/iommu: arm: Wire iommu DOMCTL for ARM Julien Grall
2014-08-06 16:24 ` Stefano Stabellini
2014-07-31 15:00 ` [PATCH v2 18/21] xen/passthrough: dt: Add new domctl XEN_DOMCTL_assign_dt_device Julien Grall
2014-08-01 9:05 ` Jan Beulich
2014-07-31 15:00 ` [PATCH v2 19/21] xen/arm: Reserve region in guest memory for device passthrough Julien Grall
2014-08-06 16:27 ` Stefano Stabellini
2014-08-06 16:33 ` Julien Grall [this message]
2014-08-06 16:44 ` Stefano Stabellini
2014-08-06 16:45 ` Stefano Stabellini
2014-08-06 16:55 ` Julien Grall
2014-08-06 16:57 ` Stefano Stabellini
2014-08-06 16:47 ` Julien Grall
2014-07-31 15:00 ` [PATCH v2 20/21] libxl: Add support for non-PCI passthrough Julien Grall
2014-08-06 16:44 ` Stefano Stabellini
2014-08-06 16:50 ` Julien Grall
2014-08-06 16:58 ` Stefano Stabellini
2014-08-08 14:15 ` Julien Grall
2014-09-09 19:12 ` Julien Grall
2014-09-10 10:08 ` Ian Campbell
2014-07-31 15:00 ` [PATCH v2 21/21] xl: Add new option dtdev Julien Grall
2014-09-09 14:34 ` [PATCH v2 00/21] xen/arm: Add support for non-pci passthrough Ian Campbell
2014-09-09 19:34 ` Julien Grall
2014-09-10 9:22 ` Christoffer Dall
2014-09-10 10:51 ` Ian Campbell
2014-09-10 11:45 ` Christoffer Dall
2014-09-10 12:05 ` Ian Campbell
2014-09-10 22:03 ` Stefano Stabellini
2014-09-11 4:03 ` Christoffer Dall
2014-09-11 8:56 ` Ian Campbell
2014-09-12 19:16 ` Julien Grall
2014-09-10 10:11 ` Ian Campbell
2014-09-10 18:45 ` Julien Grall
2014-09-11 8:58 ` Ian Campbell
2014-09-11 19:11 ` Julien Grall
2014-09-12 10:16 ` Ian Campbell
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