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> References: <54726138.3090003@linaro.org>
next in thread | previous in thread | raw e-mail | index | archive | help
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.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20141128135737.23a71643>