On Tue, Nov 22, 2011 at 7:39 PM, Dave Martin <dave.mar...@linaro.org> wrote:
> On Tue, Nov 22, 2011 at 01:14:51PM +0000, Peter Maydell wrote: > > On 22 November 2011 13:06, Jubi Taneja <jubitan...@gmail.com> wrote: > > > I am using arch/arm/configs/vexpress_defconfig to configure and build > Linux > > > Kernel 3.1.1 > > > > http://launchpad.net/linux-linaro/3.1/3.1-2011.11/+download/linux-linaro-3.1-2011.11-0.tar.bz2 > > > and then if I booth the zImage crated on Linaro QEMU > > > > http://launchpad.net/qemu-linaro/trunk/2011.10/+download/qemu-linaro-0.15.50-2011.10.tar.gz > > > ,it works properly. > > > > > But if i enable the LPAE support in the config file, the kernel builds > and > > > when I boot the kernel image on QEMU, it just prints the output as : > > > > > > Uncompressing Linux... done, booting the kernel. > > > > Does your kernel boot OK on real hardware? > > > > (ie, is a kernel with LPAE support expected to boot on a CPU like the > > A9 which doesn't have LPAE?) > > No, that will not work for the foreseeable future. Building two > pagetable models into a single kernel would likely be highly > contraversial, given Linus' views about LPAE-type platforms and HIGHMEM. > > Conversely, a kernel without LPAE turned on will work on A15 (provided > you enable the A15 CPU support in the kernel). But naturally, you will > only see the log 4GB of physical address space. > Thanks a lot for the information. > > Cheers > ---Dave >
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