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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-08-19 13:20:37 +0300 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2022-09-06 12:19:34 +0300 |
| commit | ead384d956345681e1ddf97890d5e15ded015f07 (patch) | |
| tree | aa03bbe0c8e154a3743f28b7eccb281912c20dec /arch/loongarch/Kconfig | |
| parent | 568035b01cfb107af8d2e4bd2fb9aea22cf5b868 (diff) | |
| download | linux-ead384d956345681e1ddf97890d5e15ded015f07.tar.xz | |
efi/loongarch: Add efistub booting support
This patch adds efistub booting support, which is the standard UEFI boot
protocol for LoongArch to use.
We use generic efistub, which means we can pass boot information (i.e.,
system table, memory map, kernel command line, initrd) via a light FDT
and drop a lot of non-standard code.
We use a flat mapping to map the efi runtime in the kernel's address
space. In efi, VA = PA; in kernel, VA = PA + PAGE_OFFSET. As a result,
flat mapping is not identity mapping, SetVirtualAddressMap() is still
needed for the efi runtime.
Tested-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
[ardb: change fpic to fpie as suggested by Xi Ruoyao]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'arch/loongarch/Kconfig')
| -rw-r--r-- | arch/loongarch/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 4abc9a28aba4..fca106a8b8af 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -317,6 +317,15 @@ config EFI This enables the kernel to use EFI runtime services that are available (such as the EFI variable services). +config EFI_STUB + bool "EFI boot stub support" + default y + depends on EFI + select EFI_GENERIC_STUB + help + This kernel feature allows the kernel to be loaded directly by + EFI firmware without the use of a bootloader. + config SMP bool "Multi-Processing support" help |