Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 Western Digital Corporation or its affiliates.
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*/
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#include <linux/efi.h>
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#include <asm/efi.h>
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#include <asm/sections.h>
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#include <linux/unaligned.h>
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#include "efistub.h"
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unsigned long stext_offset(void)
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{
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/*
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* When built as part of the kernel, the EFI stub cannot branch to the
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* kernel proper via the image header, as the PE/COFF header is
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* strictly not part of the in-memory presentation of the image, only
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* of the file representation. So instead, we need to jump to the
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* actual entrypoint in the .text region of the image.
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*/
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return _start_kernel - _start;
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}
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efi_status_t handle_kernel_image(unsigned long *image_addr,
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unsigned long *image_size,
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unsigned long *reserve_addr,
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unsigned long *reserve_size,
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efi_loaded_image_t *image,
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efi_handle_t image_handle)
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{
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unsigned long kernel_size, kernel_codesize, kernel_memsize;
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efi_status_t status;
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kernel_size = _edata - _start;
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kernel_codesize = __init_text_end - _start;
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kernel_memsize = kernel_size + (_end - _edata);
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*image_addr = (unsigned long)_start;
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*image_size = kernel_memsize;
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*reserve_size = *image_size;
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status = efi_kaslr_relocate_kernel(image_addr,
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reserve_addr, reserve_size,
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kernel_size, kernel_codesize, kernel_memsize,
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efi_kaslr_get_phys_seed(image_handle));
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if (status != EFI_SUCCESS) {
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efi_err("Failed to relocate kernel\n");
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*image_size = 0;
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}
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return status;
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}
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void efi_icache_sync(unsigned long start, unsigned long end)
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{
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asm volatile ("fence.i" ::: "memory");
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}
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