src: Consolidate x86_64 support Kconfig
Introduce `USE_EXP_X86_64_SUPPORT` in `src/arch/x86/Kconfig` and guard it with `HAVE_EXP_X86_64_SUPPORT`. Replace the per-CPU implementations of the same functionality with the newly-added Kconfig options. Update documentation and the config file for QEMU accordingly. Change-Id: I550216fd2a8323342d6b605306b0b95ffd5dcd1c Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/55760 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org>
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@ -15,7 +15,7 @@ processor supports x86_64 instructions (long mode).
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The qemu-i440fx mainboard has been ported to x86_64 and will serve as
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reference platform to enable additional platforms.
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To enable the support set the Kconfig option ``CONFIG_CPU_QEMU_X86_64=y``.
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To enable the support set the Kconfig option ``CONFIG_USE_EXP_X86_64_SUPPORT=y``.
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## Installing qemu
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@ -15,7 +15,7 @@ processor supports x86_64 instructions (long mode).
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The qemu-q35 mainboard has been ported to x86_64 and will serve as
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reference platform to enable additional platforms.
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To enable the support set the Kconfig option ``CONFIG_CPU_QEMU_X86_64=y``.
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To enable the support set the Kconfig option ``CONFIG_USE_EXP_X86_64_SUPPORT=y``.
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## Installing qemu
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@ -1 +1 @@
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CONFIG_CPU_QEMU_X86_64=y
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CONFIG_USE_EXP_X86_64_SUPPORT=y
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@ -63,6 +63,24 @@ config ARCH_ALL_STAGES_X86
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bool
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default y
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config HAVE_EXP_X86_64_SUPPORT
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bool
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help
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Enable experimental support to build and run coreboot in 64-bit mode.
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When selecting this option for a new platform, it is highly advisable
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to provide a config file for Jenkins to build-test the 64-bit option.
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config USE_EXP_X86_64_SUPPORT
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bool "[EXPERIMENTAL] Run coreboot in long (64-bit) mode"
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depends on HAVE_EXP_X86_64_SUPPORT
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select ARCH_ALL_STAGES_X86_64
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help
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When set, most of coreboot runs in long (64-bit) mode instead of the
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usual protected flat (32-bit) mode. 64-bit CPUs and OSes can be used
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irrespective of whether coreboot runs in 32-bit or 64-bit mode. This
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is an experimental option: do not enable unless one wants to test it
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and has the means to recover a system when coreboot fails to boot.
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config ARCH_X86_64_PGTBL_LOC
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hex "x86_64 page table location in CBFS"
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depends on ARCH_BOOTBLOCK_X86_64
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@ -3,16 +3,11 @@ config CPU_INTEL_MODEL_206AX
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if CPU_INTEL_MODEL_206AX
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config ARCH_EXP_X86_64
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bool "Experimental 64bit support"
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depends on USE_NATIVE_RAMINIT
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default n
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config CPU_SPECIFIC_OPTIONS
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def_bool y
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select ARCH_ALL_STAGES_X86_64 if ARCH_EXP_X86_64
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select ARCH_X86
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select BOOT_DEVICE_SPI_FLASH_NO_EARLY_WRITES
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select HAVE_EXP_X86_64_SUPPORT if USE_NATIVE_RAMINIT
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select MMX
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select SSE2
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select UDELAY_TSC
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@ -3,6 +3,7 @@
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config CPU_QEMU_X86
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bool
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select ARCH_X86
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select HAVE_EXP_X86_64_SUPPORT
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select UDELAY_TSC
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select TSC_MONOTONIC_TIMER
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select UNKNOWN_TSC_RATE
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@ -49,12 +50,4 @@ config MAX_CPUS
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default 32 if SMM_TSEG
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default 4
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config CPU_QEMU_X86_64
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bool "Experimental 64bit support"
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select ARCH_ALL_STAGES_X86_64
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config CPU_QEMU_X86_32
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bool
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default n if CPU_QEMU_X86_64
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default y
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endif
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