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dkasak
n00b
Joined: 10 Feb 2012
Posts: 61
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 Posted: Fri Jul 21, 2017 4:45 am Post subject: qemu and arm - extracting a kernel |
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Hi all. I'm thinking of replacing my home server with an ARM SOC, and I'd like to 1st see that everything I want to use at least compiles on ARM. I've downloaded an ARM image, which I assume is supposed to be dd'd to an SD card. I've rebuilt qemu with:
| Code: | | QEMU_SOFTMMU_TARGETS="x86_64 arm" |
virt-manager now shows me architecture options, and I can select ARM. The next screen, however, insists that "A kernel is required for armv7l guests". I've googled around a little ( eg https://fedoraproject.org/wiki/QA:Testcase_Virt_ARM_on_x86?rd=QA:Testcase_Virt_x86_on_ARM ), and seen that some people are using libguestfs-tools to extract kernels from raw images. However this ( libguestfs ) doesn't compile for me:
| Code: | checking if we should build the appliance... yes
checking for supermin... no
checking for --with-supermin-packager-config option... not set
checking for --with-supermin-extra-options option... not set
configure: error: supermin >= 5.1 must be installed
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I guess I can build it manually. Am I going down the right path here? Has someone extracted a kernel from a raw disk image and successfully booted an ARM distro on x86? |
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russK
l33t
Joined: 27 Jun 2006
Posts: 665
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54874
Location: 56N 3W
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| Posted: Fri Jul 21, 2017 8:28 am Post subject: |
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dkasak,
The kernel is one of the easiest packages to cross compile.
Its well supported because its always the first step in porting to a new CPU.
Go for cross compiling your kernel, that will make it trivial to add cross distcc later.
With | Code: | | QEMU_SOFTMMU_TARGETS="x86_64 arm" |
you can chroot into your arm code on an amd64 host. There is no need for a full KVM.
Thats explained in some detail for arm64.
Change the arm64 bits to arm.
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NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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dkasak
n00b
Joined: 10 Feb 2012
Posts: 61
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| Posted: Wed Jul 26, 2017 12:45 am Post subject: |
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Thanks for the tip re: cross-compiling. That's an interesting approach. I've just ordered my ARM system, so it will be very handy to be able to build on my AMD and push to my ARM  |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54874
Location: 56N 3W
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| Posted: Wed Jul 26, 2017 9:24 am Post subject: |
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Moved from Other Things Gentoo to Gentoo on Alternative Architectures.
ARM goes here meanwhile.
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NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Gentoo on ARM
