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payloads/edk2: Disable the CPU Timer Lib unless supported

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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>
This commit is contained in:
Sean Rhodes
2022-07-18 11:31:00 +01:00
committed by Martin L Roth
parent 27c8bf0cc9
commit 7bbc9a512a
13 changed files with 34 additions and 0 deletions
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src/soc/intel/cannonlake/Kconfig
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@@ -60,6 +60,7 @@ config CPU_SPECIFIC_OPTIONS
select CPU_INTEL_FIRMWARE_INTERFACE_TABLE
select CPU_SUPPORTS_PM_TIMER_EMULATION
select DISPLAY_FSP_VERSION_INFO
select EDK2_CPU_TIMER_LIB if PAYLOAD_EDK2
select FSP_COMPRESS_FSP_S_LZMA
select FSP_M_XIP
select FSP_STATUS_GLOBAL_RESET_REQUIRED_3