linux-kernel - Re: [PATCH v9 00/21] Introduce ACPI for ARM64 based on ACPI 5.1

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Message-ID: <54F792B4.3060600@codeaurora.org>
Date:	Wed, 04 Mar 2015 17:18:12 -0600
From:	Timur Tabi <timur@...eaurora.org>
To:	Ard Biesheuvel <ard.biesheuvel@...aro.org>
CC:	Hanjun Guo <hanjun.guo@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Will Deacon <will.deacon@....com>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Ashwin Chaugule <ashwinc@...eaurora.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Robert Richter <rric@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
	Marc Zyngier <marc.zyngier@....com>,
	Jon Masters <jcm@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Mark Brown <broonie@...nel.org>,
	Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
	Sudeep Holla <Sudeep.Holla@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9 00/21] Introduce ACPI for ARM64 based on ACPI 5.1

On 02/27/2015 02:50 AM, Ard Biesheuvel wrote:
> Are you not seeing this on v4.0-rc1 without the patchset applied?
>
> Could the crash be inside the subsequent call to
> SetVirtualAddressMap() instead of inside ExitBootServices()?
>
> If so, you have a firmware bug: Mark Rutland spotted a similar bug in
> the AMD Seattle firmware, which has been fixed in the mean time.
> It has to do with the firmware dereferencing the virtual mapping as it
> is being installed, which violates the UEFI spec.

It looks like you are right.  We fixed the bug in our UEFI and now this 
patchset works.

So all 21 patches:

Tested-by: Timur Tabi <timur@...eaurora.org>


However, I did notice one thing.  Booting the kernel displays this line:

	[   69.424001] Failed to find cpu0 device node

That's because CONFIG_OF is still defined (part of "config ARM64"), and 
therefore cache_setup_of_node() attempts to get the cache information 
from the device tree.

Should CONFIG_OF still be defined?

-- 
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
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