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    SubjectRe: [PATCH v6 00/18] ARM: Add support for the Large Physical Address Extensions
    On Tue, 24 May 2011, David Brown wrote:

    > On Tue, May 24 2011, Catalin Marinas wrote:
    >
    > > This set of patches adds support for the Large Physical Extensions on
    > > the ARM architecture (available with the Cortex-A15 processor). LPAE
    > > comes with a 3-level page table format (compared to 2-level for the
    > > classic one), allowing up to 40-bit physical address space.
    >
    > Do you expect non LPAE targets to be able to boot with these changes
    > applied (and LPAE enabled)? I am able to build this tree for the
    > MSM8660 (with a minor patch below), but it fails to boot with LPAE
    > enabled. It seems to work fine with LPAE not enabled.

    I wouldn't expect a LPAE kernel to boot on non LPAE capable hardware.

    And I don't think we'll ever try to support both LPAE and non-LPAE modes
    in the same kernel binary either since this has implications all over
    the place in core kernel mm code.


    Nicolas


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