From: Julien Grall <julien.grall@linaro.org>
To: Ian Campbell <ian.campbell@citrix.com>
Cc: Julien Grall <julien.grall@citrix.com>,
Stefano Stabellini <stefano.stabellini@citrix.com>,
Tim Deegan <tim@xen.org>,
Andre Przywara <andre.przywara@linaro.org>,
xen-devel <xen-devel@lists.xen.org>
Subject: Re: [PATCH RFC 0/N] xen: arm: rework early bring up
Date: Tue, 17 Sep 2013 12:34:52 +0100 [thread overview]
Message-ID: <52383E5C.9000704@linaro.org> (raw)
In-Reply-To: <1379381846.11304.73.camel@hastur.hellion.org.uk>
Adding Andre,
On 09/17/2013 02:37 AM, Ian Campbell wrote:
> Hi,
Hi,
> The following reworks early bring up on ARM to use a separate set of
> boot pagetables. This simplifies things by avoiding the need to bring up
> all CPUs in lock step, which in turn allows us to do secondary CPU
> bringup in C code.
Great ! I will give a try on different boards and see what happens.
> Unfortunately the main bulk of this change is a single large patch which
> is hard to decompose any further since it is basically pulling on the
> thread and then knitting a new jumper from it.
I think you can split the patch in:
- Add the new platform callback
- Fast model SMP code
- ...
We will have dead code for "few" commit in Xen, but it will be easier to
read the patch series :).
> With these changes Xen now absolutely requires that the bootloader calls
> the hypervisor in HYP mode, the previous workarounds have been removed.
> For use on models a bootwrapper is now required. See
> git://xenbits.xen.org/people/ianc/boot-wrapper.git xen-arm32
> git://xenbits.xen.org/people/ianc/boot-wrapper-aarch64.git xen-arm64
>
> I have implemented support for CPU bringup on the fastmodel vexpress
> platforms (v7and v8) here, I suppose it should work OK on a real
> vexpress too but I've not tried it.
Unfortunately on the versatile express there is 2 different ways to
bring up CPUs.
We can stick to this CPU bring up, as long as we ask the user to modify
the board configuration.
> I'm hoping that those of you with access to other platforms will
> implement the required cpu_up platform hook, it should be pretty simple
> in each case, I think.
>
> It should now also be possible to implement PSCI, but I have not done
> so.
>
> Ian
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
>
--
Julien Grall
next prev parent reply other threads:[~2013-09-17 11:34 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-17 1:37 [PATCH RFC 0/N] xen: arm: rework early bring up Ian Campbell
2013-09-17 1:40 ` [PATCH RFC 1/7] xen: arm: Load xen under 4GB on 32-bit Ian Campbell
2013-09-18 15:44 ` Julien Grall
2013-09-19 9:21 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 2/7] xen: arm: Log the raw MIDR on boot Ian Campbell
2013-09-17 12:05 ` Julien Grall
2013-09-19 9:21 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 3/7] xen: arm: make sure we stay within the memory bank during mm setup Ian Campbell
2013-09-17 12:19 ` Julien Grall
2013-09-19 9:27 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 4/7] xen: arm: add two new device tree helpers Ian Campbell
2013-09-17 13:05 ` Julien Grall
2013-09-18 17:11 ` Julien Grall
2013-09-18 17:14 ` Ian Campbell
2013-09-17 1:40 ` [PATCH RFC 5/7] xen: arm: rewrite start of day page table and cpu bring up Ian Campbell
2013-09-17 16:18 ` Julien Grall
2013-09-17 16:36 ` Ian Campbell
2013-09-17 16:55 ` Julien Grall
2013-09-17 18:30 ` Andre Przywara
2013-09-17 19:19 ` Ian Campbell
2013-09-18 13:57 ` Julien Grall
2013-09-18 15:12 ` Ian Campbell
2013-09-18 17:06 ` Julien Grall
2013-09-18 17:14 ` Ian Campbell
2013-09-19 11:36 ` Tim Deegan
2013-09-20 17:09 ` Ian Campbell
2013-09-20 17:16 ` Ian Campbell
2013-09-19 13:36 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 6/7] xen: arm: configure TCR_EL2 for 40 bit physical address space Ian Campbell
2013-09-18 15:50 ` Julien Grall
2013-09-19 13:42 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 7/7] xen: arm: split cpu0's domheap mapping PTs out from xen_second Ian Campbell
2013-09-19 13:47 ` Tim Deegan
2013-09-17 11:34 ` Julien Grall [this message]
2013-09-17 12:43 ` [PATCH RFC 0/N] xen: arm: rework early bring up Ian Campbell
2013-09-18 13:40 ` Julien Grall
2013-09-18 17:33 ` Julien Grall
2013-09-18 19:22 ` Ian Campbell
2013-09-18 19:24 ` Ian Campbell
2013-09-18 20:00 ` Julien Grall
2013-09-18 20:22 ` Ian Campbell
2013-09-18 21:14 ` Julien Grall
2013-09-18 21:28 ` Ian Campbell
2013-09-19 14:49 ` Julien Grall
2013-09-19 15:51 ` Ian Campbell
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