From: Julien Grall <julien.grall@linaro.org>
To: Ian Campbell <Ian.Campbell@citrix.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>,
tim@xen.org, xen-devel@lists.xen.org
Subject: Re: [PATCH v4 13/17] libxc: arm: allow passing a device tree blob to the guest
Date: Wed, 13 Nov 2013 13:42:40 +0000 [thread overview]
Message-ID: <528381D0.8080708@linaro.org> (raw)
In-Reply-To: <1384344971.5406.92.camel@kazak.uk.xensource.com>
On 11/13/2013 12:16 PM, Ian Campbell wrote:
> On Wed, 2013-11-13 at 12:01 +0000, Stefano Stabellini wrote:
>
>>> and in any case this
>>> is user space (and common code) so I don't know how we can do so.
>>
>> Linux offers an __ARM_NR_cacheflush syscall, it is implemented as a
>> dcache flush on v7.
>>
>>
>>> IIRC Julien was working on a generic solution for this issue.
>>
>> What is the generic solution?
>
> Not sure, could be __ARM_NR_cacheflush or maybe when adding foreign
> mappings to a p2m we should make them uncached depending on the target
> VCPUs state (in particular when the domain is under construction, I'm
> less concerned with domains which turn off caching at runtime). Or maybe
> he had some other idea.
I plan to implement the solution with __ARM_NR_cacheflush. It's the best
approach for now. It's also implemented on v8 with
__ARM_NR_compat_cacheflush.
--
Julien Grall
next prev parent reply other threads:[~2013-11-13 13:42 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-12 17:38 [PATCH v4 00/17] xen: arm: 64-bit guest support and domU FDT autogeneration Ian Campbell
2013-11-12 17:39 ` [PATCH v4 01/17] xen: update config.{sub, guess} for arm64 Ian Campbell
2013-11-12 17:46 ` Ian Campbell
2013-11-12 17:39 ` [PATCH v4 02/17] xen: arm: Report aarch64 capability Ian Campbell
2013-11-12 17:39 ` [PATCH v4 03/17] xen: arm: Add comment regard arm64 zImage v0 vs v1 Ian Campbell
2013-11-12 17:39 ` [PATCH v4 04/17] xen: arm: allocate dom0 memory separately from preparing the dtb Ian Campbell
2013-11-12 17:47 ` Ian Campbell
2013-11-12 17:39 ` [PATCH v4 05/17] xen: arm: add enable-method to cpu nodes for arm64 guests Ian Campbell
2013-11-12 17:39 ` [PATCH v4 06/17] xen: arm: include header for for arch_do_{sys, dom}ctl prototype Ian Campbell
2013-11-12 19:18 ` Stefano Stabellini
2013-11-12 17:39 ` [PATCH v4 07/17] xen: arm: implement XEN_DOMCTL_set_address_size Ian Campbell
2013-11-12 17:39 ` [PATCH v4 08/17] xen: arm: implement arch_set_info_guest for 64-bit vcpus Ian Campbell
2013-11-12 17:39 ` [PATCH v4 09/17] tools: check for libfdt when building for ARM Ian Campbell
2013-11-12 17:39 ` [PATCH v4 10/17] xen: arm: define guest virtual platform in API headers Ian Campbell
2013-11-12 19:31 ` Stefano Stabellini
2013-11-12 19:45 ` Julien Grall
2013-11-13 10:19 ` Ian Campbell
2013-11-12 17:39 ` [PATCH v4 11/17] libxc: arm: rename various bits of zimage load with 32 suffix Ian Campbell
2013-11-12 17:39 ` [PATCH v4 12/17] libxc: allow caller to specify guest rambase rather than hardcoding Ian Campbell
2013-11-12 17:39 ` [PATCH v4 13/17] libxc: arm: allow passing a device tree blob to the guest Ian Campbell
2013-11-12 18:10 ` Ian Jackson
2013-11-12 19:37 ` Stefano Stabellini
2013-11-13 10:21 ` Ian Campbell
2013-11-13 12:01 ` Stefano Stabellini
2013-11-13 12:16 ` Ian Campbell
2013-11-13 13:42 ` Julien Grall [this message]
2013-11-13 13:46 ` Ian Campbell
2013-11-13 13:51 ` Julien Grall
2013-11-12 17:39 ` [PATCH v4 14/17] libxc: support for arm64 Image format Ian Campbell
2013-11-12 17:39 ` [PATCH v4 15/17] libxc: arm64 vcpu initialisation Ian Campbell
2013-11-12 17:39 ` [PATCH v4 16/17] libxl: build a device tree for ARM guests Ian Campbell
2013-11-12 18:06 ` Ian Jackson
2013-11-13 10:04 ` Ian Campbell
2013-11-12 19:51 ` Stefano Stabellini
2013-11-13 10:26 ` Ian Campbell
2013-11-12 19:59 ` Julien Grall
2013-11-13 10:23 ` Ian Campbell
2013-11-12 17:39 ` [PATCH v4 17/17] libxl: Coding Style cleanups to libxl_dom.c Ian Campbell
2013-11-12 18:08 ` Ian Jackson
2013-11-13 10:05 ` Ian Campbell
2013-11-12 17:43 ` [PATCH v4 00/17] xen: arm: 64-bit guest support and domU FDT autogeneration Ian Campbell
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