Linux ARM SMP kernel for qemu

Linux ARM SMP kernel for qemu

[Kevin Pouget]

Hello,

do you know if it's feasible to compile a Linux kernel to be run by a Qemu
SMP ARM machine? after so many hours of tries, I can say that any version of
the kernel, any Qemu machine would be okay, provided that the SMP capability
is set, and the kernel boots !


Cordially,

Kevin Pouget
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Linux ARM SMP kernel for qemu

[Loïc Minier]

On Fri, Jan 21, 2011, Kevin Pouget wrote:
> do you know if it's feasible to compile a Linux kernel to be run by a Qemu
> SMP ARM machine? after so many hours of tries, I can say that any version of
> the kernel, any Qemu machine would be okay, provided that the SMP capability
> is set, and the kernel boots !

 I apologize for the old references, but I wondered the same a while ago
 and managed to get a SMP Realview EB kernel booted in QEMU IIRC.  I
 think it was only armv6 SMP back then.  Main issue I had back then was
 that it wouldn't support PCI so no networking or IDE.  My notes are at:
 https://lists.ubuntu.com/archives/ubuntu-mobile/2009-May/002485.html
 (some other related message same month and next month)

 I would myself love hearing what you manage to achieve, with which
 configs and issues!

-- 
Lo?c Minier

Linux ARM SMP kernel for qemu

[Rabin Vincent]

On Fri, Jan 21, 2011 at 20:47, Kevin Pouget <kevin.pouget@gmail.com> wrote:
> do you know if it's feasible to compile a Linux kernel to be run by a
> Qemu SMP ARM machine? after so many hours of tries, I can say that any
> version of the kernel, any Qemu machine would be okay, provided that
> the SMP capability is set, and the kernel boots !

Try the kernel from latest git, QEMU from latest git, and the attached
.config.

The .config is just realview_smp-defconfig with:
 - PB11 and ARMv6 disabled
 - PBX A9 and ARMv7 enabled
 - CONFIG_REALVIEW_HIGH_PHYS_OFFSET disabled

Initramfs support is also enabled.  You can boot it with this line (you'll
need an initramfs or initrd to get to userspace):

qemu-system-arm -kernel arch/arm/boot/uImage -nographic \
		-append "earlyprintk console=ttyAMA0 mem=128M debug" \
		-M realview-pbx-a9 -m 128M -initrd ~/kernel/root -smp 2
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