Query regarding booting kernel image on Linaro Qemu
jubitaneja at gmail.com
Wed Nov 23 11:38:51 UTC 2011
On Tue, Nov 22, 2011 at 7:39 PM, Dave Martin <dave.martin at linaro.org> wrote:
> On Tue, Nov 22, 2011 at 01:14:51PM +0000, Peter Maydell wrote:
> > On 22 November 2011 13:06, Jubi Taneja <jubitaneja at gmail.com> wrote:
> > > I am using arch/arm/configs/vexpress_defconfig to configure and build
> > > Kernel 3.1.1
> > >
> > > and then if I booth the zImage crated on Linaro QEMU
> > >
> > > ,it works properly.
> > > But if i enable the LPAE support in the config file, the kernel builds
> > > 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.
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