UBUNTU: [Config] Disable PAMU on Freescale kernels

In Saucy/v3.11 kernel, we used the PAMU SAUCE patch from Freescale. The
current upstreamed PAMU code appears to break fsl-ehci by restricting 
proper access to memory locations associated with it.

PAMU is an IOMMU extension that protects and prevents access to portions
of memory that are known to be reserved for hardware use. This 
extension is not needed for normal runtime, so rather than allow broken
EHCI, let's disbale this until PAMU can be fixed.

This only affects Freescale PowerPC kernel variations.

Signed-off-by: Ben Collins <ben.c@servergy.com>


--
Benjamin M. Collins | Principal Architect
Servergy, Inc. | Save Energy. Work Smart. ®
m (757) 243-7557 | e ben.c@servergy.com
L LinkedIn | T twitter.com/Servergy
www.servergy.com

CONFIDENTIALITY NOTICE: This communication contains privileged and/or confidential information to be maintained with the strictest confidence. It is intended solely for the use of the person or entity in which it is addressed. If you are not the intended recipient, you are STRICTLY PROHIBITED from disclosing, copying, distributing or using any of this information. If you received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy.  Email may contain forward looking comments that are based on managements best-faith estimates which are subject to change. For information only. Not an offer, or solicitation of any offer to buy or sell any security, investment or other product.

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On 04/22/2014 08:59 PM, Ben Collins wrote:
> In Saucy/v3.11 kernel, we used the PAMU SAUCE patch from Freescale. The current upstreamed PAMU code appears to break fsl-ehci by restricting proper access to memory locations associated with it.
> 
> PAMU is an IOMMU extension that protects and prevents access to portions of memory that are known to be reserved for hardware use. This extension is not needed for normal runtime, so rather than allow broken EHCI, let's disbale this until PAMU can be
> fixed.
> 
> This only affects Freescale PowerPC kernel variations.
> 
> Signed-off-by: Ben Collins <ben.c@servergy.com>
> 
> diff --git a/debian.master/config/config.common.ubuntu b/debian.master/config/config.common.ubuntu index a0bcc28..fa9c24e 100644 --- a/debian.master/config/config.common.ubuntu +++ b/debian.master/config/config.common.ubuntu @@ -2157,7 +2157,7 @@
> CONFIG_FSL_EMB_PERF_EVENT_E500=y CONFIG_FSL_HV_MANAGER=m CONFIG_FSL_IFC=y CONFIG_FSL_LBC=y -CONFIG_FSL_PAMU=y +# CONFIG_FSL_PAMU is not set CONFIG_FSL_PCI=y CONFIG_FSL_PME2=y CONFIG_FSL_PME2_CTRL=y
> 
> -- Benjamin M. Collins | Principal Architect Servergy, Inc. | Save Energy. Work Smart. ® m (757) 243-7557 | e ben.c@servergy.com L LinkedIn | T twitter.com/Servergy www.servergy.com
> 
> CONFIDENTIALITY NOTICE: This communication contains privileged and/or confidential information to be maintained with the strictest confidence. It is intended solely for the use of the person or entity in which it is addressed. If you are not the
> intended recipient, you are STRICTLY PROHIBITED from disclosing, copying, distributing or using any of this information. If you received this communication in error, please contact the sender immediately and destroy the material in its entirety,
> whether electronic or hard copy.  Email may contain forward looking comments that are based on managements best-faith estimates which are subject to change. For information only. Not an offer, or solicitation of any offer to buy or sell any security,
> investment or other product.
> 
> 
> 


- -- 
Brad Figg brad.figg@canonical.com http://www.canonical.com
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