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authorSean Rhodes <sean@starlabs.systems>2022-07-18 11:31:00 +0100
committerMartin L Roth <gaumless@gmail.com>2022-10-22 17:11:25 +0000
commit7bbc9a512aa1e19b8cb172fa3ad1cea5743bd3f3 (patch)
tree86bededa1834752310365ad597d9c42727eea505 /Documentation
parent27c8bf0cc936beb3d7b7012fa6d683ec74ed940f (diff)
payloads/edk2: Disable the CPU Timer Lib unless supported
For recent X86 CPUs, the 0x15 CPUID instruction will return Time Stamp Counter Frequence. For CPUs that do not support this instruction, EDK2 must include a different library which is the reason why this must be configured at build time. If this is enabled, and the CPU doesn't support 0x15, it will fail to boot. If is not enabled, and the CPU does support 0x15, it will still boot but without support for the leaf. Consequently, disabled it by default. Signed-off-by: Sean Rhodes <sean@starlabs.systems> Change-Id: I4f0f43ce50c4f6f7eb03063fff34d015468f6daa Reviewed-on: https://review.coreboot.org/c/coreboot/+/65950 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
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