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commit ddf67daac39d ("efi_capsule: Move signature from DTB to .rodata")
was reverted in
commit 47a25e81d35c ("Revert "efi_capsule: Move signature from DTB to .rodata"")
because that's what U-Boot was usually doing -- using the DT to store
configuration and data. Some of the discussions can be found here [0].
(Ab)using the device tree to store random data isn't ideal though.
On top of that with new features introduced over the years, keeping
the certificates in the DT has proven to be problematic.
One of the reasons is that platforms might send U-Boot a DTB
from the previous stage loader using a transfer list which won't contain
the signatures since other loaders are not aware of internal
U-Boot ABIs. On top of that QEMU creates the DTB on the fly, so adding
the capsule certificate there does not work and requires users to dump
it and re-create it injecting the public keys.
Now that we have proper memory permissions for arm64, move the certificate
to .rodata and read it from there.
[0] https://lore.kernel.org/u-boot/CAPnjgZ2uM=n8Qo-a=DUkx5VW5Bzp5Xy8=Wgmrw8ESqUBK00YJQ@mail.gmail.com/
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Tested-by: Jonathan Humphreys <j-humphreys@ti.com> # on TI sk-am62p-lp
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on AML-A311D-CC
Tested-by: Raymond Mao <raymond.mao@linaro.org>
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Comment is not kernel-doc format that's why don't label it like that and
also fix indentation to have proper multiline comment.
Signed-off-by: Michal Simek <michal.simek@amd.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
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The EFI capsule authentication logic in u-boot expects the public key
in the form of an EFI Signature List(ESL) to be provided as part of
the platform's dtb. Currently, the embedding of the ESL file into the
dtb needs to be done manually.
Add a target for generating a dtsi file which contains the signature
node with the ESL file included as a property under the signature
node. Include the dtsi file in the dtb. This brings the embedding of
the ESL in the dtb into the U-Boot build flow.
The path to the ESL file is specified through the
CONFIG_EFI_CAPSULE_ESL_FILE symbol.
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
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