From: Julien Grall <julien.grall@linaro.org>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: xen-devel@lists.xenproject.org, stefano.stabellini@citrix.com,
Ian Campbell <Ian.Campbell@citrix.com>,
tim@xen.org
Subject: Re: [RFC 15/19] xen/arm: Reserve region in guest memory for device passthrough
Date: Wed, 18 Jun 2014 19:33:38 +0100 [thread overview]
Message-ID: <53A1DB82.6080709@linaro.org> (raw)
In-Reply-To: <alpine.DEB.2.02.1406181909190.13771@kaball.uk.xensource.com>
On 18/06/14 19:14, Stefano Stabellini wrote:
>> For non-PCI passthrough this size will unlikely happen. We always map a
>> matter of few pages per-device.
>>
>> I think this size is enough for the time being. I plan to revisit it for
>> PCI passthrough where we will be able to allocate some of them after 4G.
>
> Modern GPUs can easily exceed 512MB and they work on ARM.
If it's like on x86, passthrough GPUs may also require firmware. At
least it looks like the case with some configuration on the Arndale,
which doesn't have any SMMU.
I'd like to make this series as simple as possible so we can get
"quickly" a working solution to passthrough device with small amount of
MMIO region.
So if you don't mind I suggest to bump the amount of MMIO region to 1GB,
I may need to shrink the first RAM bank, and think about bigger region
support in a follow-up series.
Regards,
--
Julien Grall
next prev parent reply other threads:[~2014-06-18 18:33 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-16 16:17 [RFC 00/19] xe/arm: Add support for non-pci passthrough Julien Grall
2014-06-16 16:17 ` [RFC 01/19] xen/arm: guest_physmap_remove_page: Print a warning if we fail to unmap the page Julien Grall
2014-06-18 15:03 ` Stefano Stabellini
2014-07-03 10:52 ` Ian Campbell
2014-07-03 11:17 ` Julien Grall
2014-06-16 16:17 ` [RFC 02/19] xen: guestcopy: Provide an helper to copy string from guest Julien Grall
2014-06-17 8:01 ` Jan Beulich
2014-06-17 9:09 ` Julien Grall
2014-06-17 9:17 ` Jan Beulich
2014-06-17 9:23 ` Julien Grall
2014-06-17 22:43 ` Daniel De Graaf
2014-06-18 11:59 ` Jan Beulich
2014-06-18 12:22 ` Julien Grall
2014-06-18 12:49 ` Jan Beulich
2014-06-18 12:53 ` Julien Grall
2014-06-18 13:01 ` Jan Beulich
2014-06-24 14:58 ` Julien Grall
2014-06-16 16:17 ` [RFC 03/19] xen/arm: follow-up to allow DOM0 manage IRQ and MMIO Julien Grall
2014-06-18 20:21 ` Stefano Stabellini
2014-06-18 20:32 ` Julien Grall
2014-07-03 11:02 ` Ian Campbell
2014-07-03 11:23 ` Julien Grall
2014-07-03 12:12 ` Ian Campbell
2014-06-16 16:17 ` [RFC 04/19] xen/arm: route_irq_to_guest: Check validity of the IRQ Julien Grall
2014-06-18 18:52 ` Stefano Stabellini
2014-06-18 19:03 ` Julien Grall
2014-07-03 11:04 ` Ian Campbell
2014-07-03 11:47 ` Julien Grall
2014-06-16 16:17 ` [RFC 05/19] xen/arm: Release IRQ routed to a domain when it's destroying Julien Grall
2014-06-18 18:08 ` Stefano Stabellini
2014-06-18 18:26 ` Julien Grall
2014-06-18 18:48 ` Stefano Stabellini
2014-06-18 18:54 ` Julien Grall
2014-06-18 19:06 ` Stefano Stabellini
2014-06-18 19:09 ` Julien Grall
2014-06-16 16:17 ` [RFC 06/19] xen/arm: Implement hypercall PHYSDEVOP_map_pirq Julien Grall
2014-06-18 19:24 ` Stefano Stabellini
2014-06-19 11:39 ` Julien Grall
2014-06-19 12:29 ` Stefano Stabellini
2014-07-03 11:27 ` Ian Campbell
2014-07-03 12:02 ` Julien Grall
2014-07-03 12:53 ` Ian Campbell
2014-07-15 13:01 ` Julien Grall
2014-07-15 13:03 ` Ian Campbell
2014-08-18 19:20 ` Andrii Tseglytskyi
2014-08-18 21:55 ` Julien Grall
2014-08-19 9:11 ` Andrii Tseglytskyi
2014-08-19 14:24 ` Julien Grall
2014-06-16 16:17 ` [RFC 07/19] xen/dts: Use unsigned int for MMIO and IRQ index Julien Grall
2014-06-18 18:54 ` Stefano Stabellini
2014-06-19 11:42 ` Julien Grall
2014-06-16 16:17 ` [RFC 08/19] xen/dts: Provide an helper to get a DT node from a path provided by a guest Julien Grall
2014-07-03 11:30 ` Ian Campbell
2014-07-03 11:49 ` Julien Grall
2014-07-03 12:13 ` Ian Campbell
2014-07-03 12:22 ` Julien Grall
2014-06-16 16:17 ` [RFC 09/19] xen/dts: Add hypercalls to retrieve device node information Julien Grall
2014-06-18 19:38 ` Stefano Stabellini
2014-06-19 11:58 ` Julien Grall
2014-06-19 12:21 ` Stefano Stabellini
2014-06-19 12:25 ` Julien Grall
2014-07-03 11:40 ` Ian Campbell
2014-06-24 8:46 ` Christoffer Dall
2014-07-03 11:34 ` Ian Campbell
2014-07-03 11:33 ` Ian Campbell
2014-07-03 11:51 ` Julien Grall
2014-07-03 12:13 ` Ian Campbell
2014-06-16 16:17 ` [RFC 10/19] xen/passthrough: Introduce iommu_buildup Julien Grall
2014-07-03 11:45 ` Ian Campbell
2014-07-03 11:55 ` Julien Grall
2014-06-16 16:17 ` [RFC 11/19] xen/passthrough: Call arch_iommu_domain_destroy before calling iommu_teardown Julien Grall
2014-06-17 8:07 ` Jan Beulich
2014-06-17 9:18 ` Julien Grall
2014-06-17 9:29 ` Jan Beulich
2014-06-17 12:38 ` Julien Grall
2014-06-17 13:04 ` Jan Beulich
2014-06-18 12:24 ` Julien Grall
2014-06-18 12:50 ` Jan Beulich
2014-06-16 16:17 ` [RFC 12/19] xen/passthrough: iommu_deassign_device_dt: By default reassign device to nobody Julien Grall
2014-06-18 19:28 ` Stefano Stabellini
2014-07-03 11:48 ` Ian Campbell
2014-07-03 12:07 ` Julien Grall
2014-07-03 12:53 ` Ian Campbell
2014-07-03 13:01 ` Julien Grall
2014-07-03 13:42 ` Ian Campbell
2014-07-03 13:51 ` Julien Grall
2014-07-03 14:04 ` Ian Campbell
2014-07-03 14:09 ` Julien Grall
2014-06-16 16:18 ` [RFC 13/19] xen/iommu: arm: Wire iommu DOMCTL for ARM Julien Grall
2014-06-17 8:24 ` Jan Beulich
2014-06-17 13:05 ` Julien Grall
2014-06-16 16:18 ` [RFC 14/19] xen/passthrough: dt: Add new domctl XEN_DOMCTL_assign_dt_device Julien Grall
2014-06-17 8:34 ` Jan Beulich
2014-06-17 13:23 ` Julien Grall
2014-06-17 13:30 ` Jan Beulich
2014-06-17 13:48 ` Julien Grall
2014-06-17 13:55 ` Jan Beulich
2014-07-03 11:54 ` Ian Campbell
2014-06-16 16:18 ` [RFC 15/19] xen/arm: Reserve region in guest memory for device passthrough Julien Grall
2014-06-18 15:12 ` Stefano Stabellini
2014-06-18 15:23 ` Julien Grall
2014-06-18 15:26 ` Ian Campbell
2014-06-18 17:48 ` Stefano Stabellini
2014-06-18 17:54 ` Julien Grall
2014-06-18 18:14 ` Stefano Stabellini
2014-06-18 18:33 ` Julien Grall [this message]
2014-06-18 18:55 ` Stefano Stabellini
2014-07-03 11:56 ` Ian Campbell
2014-06-16 16:18 ` [RFC 16/19] libxl/arm: Introduce DT_IRQ_TYPE_* Julien Grall
2014-07-03 11:56 ` Ian Campbell
2014-06-16 16:18 ` [RFC 17/19] libxl/arm: Rename set_interrupt_ppi to set_interrupt and handle SPIs Julien Grall
2014-07-03 11:58 ` Ian Campbell
2014-07-03 12:04 ` Julien Grall
2014-07-03 14:04 ` Ian Campbell
2014-06-16 16:18 ` [RFC 18/19] libxl: Add support for non-PCI passthrough Julien Grall
2014-06-16 17:19 ` Wei Liu
2014-06-18 12:26 ` Julien Grall
2014-06-16 16:18 ` [RFC 19/19] xl: Add new option dtdev Julien Grall
2014-06-16 17:19 ` Wei Liu
2014-06-18 13:40 ` Julien Grall
2014-06-18 13:43 ` Wei Liu
2014-06-18 13:46 ` Julien Grall
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