Date: Fri, 28 Nov 2014 13:57:37 +0000 From: Andrew Turner <andrew@fubar.geek.nz> To: Julien Grall <julien.grall@linaro.org> Cc: Ian Campbell <Ian.Campbell@citrix.com>, Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>, freebsd-xen@freebsd.org, freebsd-arm@freebsd.org, Denis Schneider <v1ne2go@gmail.com>, gibbs@freebsd.org, roger.pau@citrix.com Subject: Re: [RFC v2] Add support for Xen ARM guest on FreeBSD Message-ID: <20141128135737.23a71643@bender.lan> In-Reply-To: <54726138.3090003@linaro.org>
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On Sun, 23 Nov 2014 22:35:36 +0000 Julien Grall <julien.grall@linaro.org> wrote: > Hello all, > > At the beginning of the year, I have sent a first RFC to add support > for FreeBSD on Xen ARM [1]. ... > Major changes in this new version: > * Add Device Tree support via Linux Boot ABI > * Add zImage support > * Netfront support > * Blkfront fixes > * DOM0 support (separate branch see below) > > The former item is very hackish. I was wondering if there is another > way to do it? Or maybe we should support FreeBSD Bootloader in ARM > guest? I think using the loader is the correct way to handle booting in Xen. It allows us to relocate the dtb as required. It look like a zImage then use the Xen console to interact with the user. > > The patch series is divided in X parts: > * #1 - #14: Clean up and bug fixes for Xen. They can be > applied without the rest of the series > * #15 - #19: Update Xen interface to 4.4 and fix > compilation. It's required for ARM. > * #20 - #26: Update Xen code to support ARM > * #27 - #33: Rework the event channel code for supporting > ARM. I will work with Royger to come with a common interface with x86 > * #34 - #36: Add support for ARM in Xen code > * #37 - #46: ARM bug fixes and new features. Some of thoses > patches (#37 - #40) could be applied without the rest of the series > * #47 - #48: Add Xen ARM platform I have committed patches 30 and 40 as they look good. I'm not familiar with the code to review 37 or 38, however from my quick look at 38 I appears _bus_dmamap_load_buffer does take in to account buflen and dmat->maxsegsz when setting sgsize just not dmat->alignment. ... > > TODO: > * Add SMP/PSCI support in FreeBSD. Could be useful other > platform too Adding PSCI support is on my TODO lost for arm64, however I don't expect to get on ti in until early next year. > * Only FreeBSD to load anywhere. Currently there is a 2M > alignment which require a patch in Xen. If you use the loader this will be fixed as the loader can load the kernel at the correct alignment.home | help
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