Re: [DistroKit] [PATCH] x86_64: kernel: enable EFI support

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

On 24.01.25 11:03, Roland Hieber wrote:
> On x86 hardware, EFI is almost always used. Make sure the kernel
> supports it, and enable the following config options:
> 
> * EFI: EFI runtime service support
> * EFI_STUB: Allows a bzImage to be loaded directly by EFI firmware
>   without the use of a bootloader
> * EFI_RUNTIME_MAP: Export EFI runtime maps to sysfs
> * FB_EFI: EFI-based Framebuffer Support

 * EFI_HANDOVER_PROTOCOL: Needed to support the non-standard handover protocol,
   which is still used by e.g. barebox.

> Signed-off-by: Roland Hieber <rhi@pengutronix.de>

Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>

> ---
>  configs/platform-x86_64/kernelconfig | 46 +++++++++++++++++++++++++++-
>  1 file changed, 45 insertions(+), 1 deletion(-)
> 
> diff --git a/configs/platform-x86_64/kernelconfig b/configs/platform-x86_64/kernelconfig
> index 8ccb4721e77b..1ddf2bd60480 100644
> --- a/configs/platform-x86_64/kernelconfig
> +++ b/configs/platform-x86_64/kernelconfig
> @@ -349,6 +349,7 @@ CONFIG_CPU_SUP_ZHAOXIN=y
>  CONFIG_HPET_TIMER=y
>  CONFIG_DMI=y
>  # CONFIG_GART_IOMMU is not set
> +CONFIG_BOOT_VESA_SUPPORT=y
>  # CONFIG_MAXSMP is not set
>  CONFIG_NR_CPUS_RANGE_BEGIN=2
>  CONFIG_NR_CPUS_RANGE_END=512
> @@ -391,6 +392,7 @@ CONFIG_MICROCODE=y
>  CONFIG_X86_5LEVEL=y
>  CONFIG_X86_DIRECT_GBPAGES=y
>  # CONFIG_X86_CPA_STATISTICS is not set
> +# CONFIG_AMD_MEM_ENCRYPT is not set
>  # CONFIG_NUMA is not set
>  CONFIG_ARCH_SPARSEMEM_ENABLE=y
>  CONFIG_ARCH_SPARSEMEM_DEFAULT=y
> @@ -412,7 +414,11 @@ CONFIG_X86_INTEL_TSX_MODE_OFF=y
>  # CONFIG_X86_INTEL_TSX_MODE_ON is not set
>  # CONFIG_X86_INTEL_TSX_MODE_AUTO is not set
>  # CONFIG_X86_USER_SHADOW_STACK is not set
> -# CONFIG_EFI is not set
> +CONFIG_EFI=y
> +CONFIG_EFI_STUB=y
> +CONFIG_EFI_HANDOVER_PROTOCOL=y
> +# CONFIG_EFI_MIXED is not set
> +CONFIG_EFI_RUNTIME_MAP=y
>  # CONFIG_HZ_100 is not set
>  CONFIG_HZ_250=y
>  # CONFIG_HZ_300 is not set
> @@ -520,6 +526,7 @@ CONFIG_ACPI_CONTAINER=y
>  CONFIG_ACPI_HOTPLUG_IOAPIC=y
>  # CONFIG_ACPI_SBS is not set
>  # CONFIG_ACPI_HED is not set
> +# CONFIG_ACPI_BGRT is not set
>  # CONFIG_ACPI_REDUCED_HARDWARE_ONLY is not set
>  CONFIG_ACPI_NHLT=y
>  # CONFIG_ACPI_NFIT is not set
> @@ -532,6 +539,7 @@ CONFIG_HAVE_ACPI_APEI_NMI=y
>  CONFIG_ACPI_PCC=y
>  # CONFIG_ACPI_FFH is not set
>  # CONFIG_PMIC_OPREGION is not set
> +CONFIG_ACPI_PRMT=y
>  CONFIG_X86_PM_TIMER=y
>  
>  #
> @@ -732,6 +740,7 @@ CONFIG_STRICT_KERNEL_RWX=y
>  CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
>  CONFIG_STRICT_MODULE_RWX=y
>  CONFIG_HAVE_ARCH_PREL32_RELOCATIONS=y
> +CONFIG_ARCH_USE_MEMREMAP_PROT=y
>  # CONFIG_LOCK_EVENT_COUNTS is not set
>  CONFIG_ARCH_HAS_MEM_ENCRYPT=y
>  CONFIG_HAVE_STATIC_CALL=y
> @@ -1277,9 +1286,29 @@ CONFIG_DMIID=y
>  CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK=y
>  # CONFIG_ISCSI_IBFT is not set
>  # CONFIG_FW_CFG_SYSFS is not set
> +CONFIG_SYSFB=y
>  # CONFIG_SYSFB_SIMPLEFB is not set
>  # CONFIG_GOOGLE_FIRMWARE is not set
>  
> +#
> +# EFI (Extensible Firmware Interface) Support
> +#
> +CONFIG_EFI_ESRT=y
> +CONFIG_EFI_DXE_MEM_ATTRIBUTES=y
> +CONFIG_EFI_RUNTIME_WRAPPERS=y
> +# CONFIG_EFI_BOOTLOADER_CONTROL is not set
> +# CONFIG_EFI_CAPSULE_LOADER is not set
> +# CONFIG_EFI_TEST is not set
> +# CONFIG_APPLE_PROPERTIES is not set
> +# CONFIG_RESET_ATTACK_MITIGATION is not set
> +# CONFIG_EFI_RCI2_TABLE is not set
> +# CONFIG_EFI_DISABLE_PCI_DMA is not set
> +CONFIG_EFI_EARLYCON=y
> +# CONFIG_EFI_CUSTOM_SSDT_OVERLAYS is not set
> +# CONFIG_EFI_DISABLE_RUNTIME is not set
> +# CONFIG_EFI_COCO_SECRET is not set
> +# end of EFI (Extensible Firmware Interface) Support
> +
>  #
>  # Qualcomm firmware drivers
>  #
> @@ -2635,6 +2664,8 @@ CONFIG_BCMA_POSSIBLE=y
>  #
>  # Graphics support
>  #
> +CONFIG_APERTURE_HELPERS=y
> +CONFIG_SCREEN_INFO=y
>  CONFIG_VIDEO=y
>  # CONFIG_AUXDISPLAY is not set
>  # CONFIG_AGP is not set
> @@ -2719,6 +2750,7 @@ CONFIG_FB=y
>  # CONFIG_FB_IMSTT is not set
>  # CONFIG_FB_VGA16 is not set
>  # CONFIG_FB_VESA is not set
> +CONFIG_FB_EFI=y
>  # CONFIG_FB_N411 is not set
>  # CONFIG_FB_HGA is not set
>  # CONFIG_FB_OPENCORES is not set
> @@ -2753,12 +2785,17 @@ CONFIG_FB_CORE=y
>  CONFIG_FB_NOTIFY=y
>  # CONFIG_FIRMWARE_EDID is not set
>  # CONFIG_FB_DEVICE is not set
> +CONFIG_FB_CFB_FILLRECT=y
> +CONFIG_FB_CFB_COPYAREA=y
> +CONFIG_FB_CFB_IMAGEBLIT=y
>  CONFIG_FB_SYS_FILLRECT=y
>  CONFIG_FB_SYS_COPYAREA=y
>  CONFIG_FB_SYS_IMAGEBLIT=y
>  # CONFIG_FB_FOREIGN_ENDIAN is not set
>  CONFIG_FB_SYSMEM_FOPS=y
>  CONFIG_FB_DEFERRED_IO=y
> +CONFIG_FB_IOMEM_FOPS=y
> +CONFIG_FB_IOMEM_HELPERS=y
>  CONFIG_FB_SYSMEM_HELPERS=y
>  CONFIG_FB_SYSMEM_HELPERS_DEFERRED=y
>  # CONFIG_FB_MODE_HELPERS is not set
> @@ -3588,6 +3625,7 @@ CONFIG_TMPFS_XATTR=y
>  # CONFIG_HUGETLBFS is not set
>  CONFIG_ARCH_HAS_GIGANTIC_PAGE=y
>  # CONFIG_CONFIGFS_FS is not set
> +CONFIG_EFIVAR_FS=y
>  # end of Pseudo filesystems
>  
>  CONFIG_MISC_FILESYSTEMS=y
> @@ -3738,6 +3776,7 @@ CONFIG_PROC_MEM_ALWAYS_FORCE=y
>  CONFIG_HARDENED_USERCOPY=y
>  CONFIG_FORTIFY_SOURCE=y
>  # CONFIG_STATIC_USERMODEHELPER is not set
> +# CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT is not set
>  CONFIG_DEFAULT_SECURITY_DAC=y
>  CONFIG_LSM="lockdown,yama,loadpin,safesetid,integrity"
>  
> @@ -4089,11 +4128,15 @@ CONFIG_CLZ_TAB=y
>  CONFIG_MPILIB=y
>  CONFIG_DIMLIB=y
>  CONFIG_OID_REGISTRY=y
> +CONFIG_UCS2_STRING=y
>  CONFIG_HAVE_GENERIC_VDSO=y
>  CONFIG_GENERIC_GETTIMEOFDAY=y
>  CONFIG_GENERIC_VDSO_TIME_NS=y
>  CONFIG_GENERIC_VDSO_OVERFLOW_PROTECT=y
>  CONFIG_VDSO_GETRANDOM=y
> +CONFIG_FONT_SUPPORT=y
> +CONFIG_FONT_8x16=y
> +CONFIG_FONT_AUTOSELECT=y
>  CONFIG_SG_POOL=y
>  CONFIG_ARCH_HAS_PMEM_API=y
>  CONFIG_ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION=y
> @@ -4405,6 +4448,7 @@ CONFIG_X86_VERBOSE_BOOTUP=y
>  CONFIG_EARLY_PRINTK=y
>  # CONFIG_EARLY_PRINTK_DBGP is not set
>  # CONFIG_EARLY_PRINTK_USB_XDBC is not set
> +# CONFIG_EFI_PGT_DUMP is not set
>  # CONFIG_DEBUG_TLBFLUSH is not set
>  CONFIG_HAVE_MMIOTRACE_SUPPORT=y
>  # CONFIG_X86_DECODER_SELFTEST is not set


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |