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Some past security reviews carried out for UEFI Secure Boot signing
submissions have covered specific drivers or functional areas of iPXE.
Mark all of the files comprising these areas as permitted for UEFI
Secure Boot.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Allow an initrd location to be specified in our constructed device
tree via the "linux,initrd-start" and "linux,initrd-end" properties.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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When creating a device tree to pass to a booted operating system,
ensure that the "chosen" node exists, and populate the "bootargs"
property with the image command line.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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If we have a device tree available (e.g. because the user has
explicitly downloaded a device tree using the "fdt" command), then
provide it to the booted operating system as an EFI configuration
table.
Since x86 does not typically use device trees, we create weak symbols
for efi_fdt_install() and efi_fdt_uninstall() to avoid dragging FDT
support into all x86 UEFI binaries.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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EFI configuration tables may be freed at any time, and there is no way
to be notified when the table becomes invalidated. Create a copy of
the system flattened device tree (if present), so that we do not risk
being left with an invalid pointer.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Allow for parsing device trees where an external factor (such as a
downloaded image length) determines the maximum length, which must be
validated against the length within the device tree header.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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When running on a platform that uses FDT as its hardware description
mechanism, we are likely to have multiple device tree structures. At
a minimum, there will be the device tree passed to us from the
previous boot stage (e.g. OpenSBI), and the device tree that we
construct to be passed to the booted operating system.
Update the internal FDT API to include an FDT pointer in all function
parameter lists.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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