[RFC PATCH 1/1] arm64: Add support for 48-bit Physical Address

[Catalin Marinas]

On Wed, Feb 26, 2014 at 01:49:50PM +0000, Christopher Covington wrote:
> On 02/26/2014 12:58 AM, mohun106 at gmail.com wrote:
> > From: Radha Mohan Chintakuntla <rchintakuntla at cavium.com>
> > 
> > Added support for ARMv8 platforms that have 48-bit physical address
> > implemented. There is no change in the VA bits and levels of
> > translation.
> 
> Is there benefit to using build-time constants for this information? Why not
> look up the physical address range at run time, so that a single kernel binary
> could run on any system?

I agree, we don't need a Kconfig option for this, just check the
available (intermediate) physical address bits at boot-time
(ID_AA64MMFR0_EL1) and program the TCR_ELx registers accordingly.

(for whatever reason, I got the same patches in private and I replied
with the same but they haven't been changed before appearing on the
list)

-- 
Catalin