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Support building across architectures #5

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Support building across architectures #5

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Commits on Jan 9, 2022

  1. Makefile.inc: Replace hardcoded architecture in initramfs name 

    Add an ARCH variable and replace the hardcoded "amd64" with a string
derived from `uname -m` in order to build non-x86 initramfs images.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
    @dhendrix
    dhendrix committed Jan 9, 2022
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  2. Makefile.inc: Build coreboot toolchain according to ARCH 

    Replace crossgcc-i386 with crossgcc-${ARCH} based on the
architecture passed in from Makefile.inc.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
    @dhendrix
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  3. Makefile.inc: Make VPD support optional 

    Make VPD support optional in order to enable builds for more mainboard
targets. VPD should still be added for production usage, this is
mostly intended to help get new targets up and running.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  4. qemu: Patch coreboot buildgcc to build -linux toolchains 

    This will be used when cross-compiling Linux kernels.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  5. Use Linux arch in kernel config name 

    Linux and `uname` don't always agree on what to call a given
architecture. This adds a LINUX_ARCH variable that will be used for
kernel config names and for cross-compilation.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  6. Makefile.inc: Add LINUX_IMAGE_RELATIVE_PATH variable 

    Accomodate different paths to the kernel image for various
architectures.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  7. qemu: Add ARCH detection in Makefile 

    Make the build and qemu invocation more cross-platform friendly.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  8. Makefile.inc: Make Go variables cross-compiler friendly 

    GOARCH needs to reflect the target architecture. GOROOT needs to point
at GOROOT that is compatible with the host.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  9. Enable building a toolchain for Linux 

    Leverage coreboot's buildgcc to build a suitable Linux toolchain if
needed.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  10. qemu: Use $(PLATFORM) to determine $(OUT) name 

    This is needed due to mismatched machine names used by `uname` and
qemu-system-*.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  11. qemu: Split out common portions of make run rule 

    This will be useful later when we add targets for other architectures.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  12. qemu-amd64: update coreboot hash to 4.15 

    GCC 8.3.0 seems to have compilation issues, and we may as well update
to the latest coreboot release anyway.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  13. qemu: Split kernel-x86_64.config 

    This attempts to make a "splitconfig" type of kernel configuration for
x86_64 so that we only include options that are intentionally enabled.
Other options will be set to default values by `make olddefconfig`.

Tested by building from scratch and booting to u-root shell using
qemu-system-x86_64.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  14. [notformerge] Make coreboot's buildgcc use a gzip'd gcc tarball 

    Decompressing GCC takes a significant amount of time. Gzip can be
decompressed using multiple threads (buildgcc will use `pigz` if
available), so this just trades decompression speed and download
time (download should only occur once anyway).

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  15. WIP: qemu: Add aarch64 targets and config files 

    This gives us a target to build. It does not work yet.

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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  16. WIP: qemu: Add ppc64le targets and config files 

    This gives us a target to build. It does not work yet.

Note: This should use the power9 qemu target for coreboot once it's merged:
  https://review.coreboot.org/c/coreboot/+/57084

Signed-off-by: David Hendricks <david.hendricks@gmail.com>
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