x86_64 firmware support: Use fixed size struct elements to support cross arch firmwares #59
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@PatrickRudolph, that is good feedback. We will keep that in mind while developing new FSP's for future Intel platforms. Rewriting the UPD headers for pre-existing FSP binaries going back to the beginning of time isn't a maintainable activity, for the same reason that keeping coreboot local copies of UPD headers makes updates tricky. |
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Add new Kconfig symbols to mark FSP binary as x86_32. Fix the FSP headers and replace void pointers by fixed sized integers depending on the used mode to compile the FSP. This issue has been reported here: intel/FSP#59 This is necessary to run on x86_64, as pointers have different size. Add preprocessor error to warn that x86_64 FSP isn't supported by the current code. Tested on Intel Skylake. FSP-M no longer returns the error "Invalid Parameter". Change-Id: I6015005c4ee3fc2f361985cf8cff896bcefd04fb Signed-off-by: Patrick Rudolph <[email protected]> Reviewed-on: https://review.coreboot.org/c/coreboot/+/48174 Tested-by: build bot (Jenkins) <[email protected]> Reviewed-by: Angel Pons <[email protected]>
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Fix the FSP headers and replace void pointers by fixed sized integers depending on the used mode to compile the FSP. Change request here:intel/FSP#59 This is necessary to run on x86_64, as pointers have different size. Add preprocessor error to warn that x86_64 FSP isn't supported by the current code. BUG=b:200113959 TEST=Verified on Meteor Lake platform, without any compilation error Signed-off-by: Subrata Banik <[email protected]> Change-Id: I1f33db43f7932cf6d165d0c70a0e2922dad00a09 Reviewed-on: https://review.coreboot.org/c/coreboot/+/62847 Tested-by: build bot (Jenkins) <[email protected]> Reviewed-by: Anil Kumar K <[email protected]> Reviewed-by: Tim Wawrzynczak <[email protected]>
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As FSP binaries are released with a fixed architecture (x86_32), the header must not contain variable size fields like SIZE_T, UINTN, VOID* or UINTPTR_T. If compiled on x86_64 this would cause those structs to not match the ones used internally by FSP as the element size differs.
Please remove such elements and only use variables that have a fixed size, even on when compiled on x86_64.
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