From: "André Przywara" <andre.przywara@arm.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3 3/3] sunxi: add support for Lichee Pi Zero
Date: Thu, 16 Feb 2017 01:32:19 +0000 [thread overview]
Message-ID: <15d19a7e-5324-93b7-ee46-402a462edf1b@arm.com> (raw)
In-Reply-To: <20170214073603.m4w7qwct4rcn2jfd@lukather>
On 14/02/17 07:36, Maxime Ripard wrote:
> On Mon, Feb 13, 2017 at 04:12:04PM +0800, Icenowy Zheng wrote:
>>
>> 2017?2?13? 15:17? Maxime Ripard <maxime.ripard@free-electrons.com>???
>>>
>>> Hi,
>>>
>>> On Sat, Feb 11, 2017 at 07:11:02PM +0800, Icenowy Zheng wrote:
>>>> @@ -0,0 +1,13 @@
>>>> +CONFIG_ARM=y
>>>> +CONFIG_ARCH_SUNXI=y
>>>> +# CONFIG_ARMV7_NONSEC is not set
>>>
>>> Why? It doesn't have Trustzone?
>>
>> The CPU has Secure mode, but no TrustZone Peripheral Controller,
>> neither SMP.
>
> Still, booting in HYP and having PSCI sounds like a good idea.
Yes, so without this option Linux will run in secure state, if I am not
mistaken, which is discouraged. Instead we should enter Linux in
(non-secure) HYP mode [1], which will allow KVM, for instance. So I'd
recommend to remove this last line.
Whether we need PSCI on an UP system is a separate question, I don't
know from the top of my head if ARM(32) uses it for suspend/resume. But
anyway this is not implemented in U-Boot's PSCI implementation, IIRC.
So for just disabling PSCI we could use:
+# CONFIG_ARMV7_PSCI is not set
Cheers,
Andre.
[1] http://lxr.free-electrons.com/source/Documentation/arm/Booting#L188
next prev parent reply other threads:[~2017-02-16 1:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-13 8:12 [U-Boot] [PATCH v3 3/3] sunxi: add support for Lichee Pi Zero Icenowy Zheng
2017-02-14 7:36 ` Maxime Ripard
2017-02-16 1:32 ` André Przywara [this message]
2017-02-16 2:06 ` [U-Boot] [linux-sunxi] " Chen-Yu Tsai
2017-02-16 7:40 ` [U-Boot] " Maxime Ripard
-- strict thread matches above, loose matches on Subject: below --
2017-02-11 11:11 [U-Boot] [PATCH v3 1/3] sunxi: add basic V3s support Icenowy Zheng
2017-02-11 11:11 ` [U-Boot] [PATCH v3 3/3] sunxi: add support for Lichee Pi Zero Icenowy Zheng
2017-02-13 7:17 ` Maxime Ripard
2017-02-28 14:42 ` Jagan Teki
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