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8338151935
Factor out the decompressor sequence that invokes the decompressor, parses the ELF and applies the relocations so that it can be called directly from the EFI stub. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20230807162720.545787-21-ardb@kernel.org
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_BOOT_H
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#define _ASM_X86_BOOT_H
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#include <asm/pgtable_types.h>
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#include <uapi/asm/boot.h>
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/* Physical address where kernel should be loaded. */
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#define LOAD_PHYSICAL_ADDR ((CONFIG_PHYSICAL_START \
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+ (CONFIG_PHYSICAL_ALIGN - 1)) \
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& ~(CONFIG_PHYSICAL_ALIGN - 1))
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/* Minimum kernel alignment, as a power of two */
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#ifdef CONFIG_X86_64
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# define MIN_KERNEL_ALIGN_LG2 PMD_SHIFT
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#else
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# define MIN_KERNEL_ALIGN_LG2 (PAGE_SHIFT + THREAD_SIZE_ORDER)
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#endif
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#define MIN_KERNEL_ALIGN (_AC(1, UL) << MIN_KERNEL_ALIGN_LG2)
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#if (CONFIG_PHYSICAL_ALIGN & (CONFIG_PHYSICAL_ALIGN-1)) || \
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(CONFIG_PHYSICAL_ALIGN < MIN_KERNEL_ALIGN)
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# error "Invalid value for CONFIG_PHYSICAL_ALIGN"
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#endif
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#if defined(CONFIG_KERNEL_BZIP2)
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# define BOOT_HEAP_SIZE 0x400000
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#elif defined(CONFIG_KERNEL_ZSTD)
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/*
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* Zstd needs to allocate the ZSTD_DCtx in order to decompress the kernel.
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* The ZSTD_DCtx is ~160KB, so set the heap size to 192KB because it is a
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* round number and to allow some slack.
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*/
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# define BOOT_HEAP_SIZE 0x30000
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#else
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# define BOOT_HEAP_SIZE 0x10000
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#endif
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#ifdef CONFIG_X86_64
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# define BOOT_STACK_SIZE 0x4000
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# define BOOT_INIT_PGT_SIZE (6*4096)
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# ifdef CONFIG_RANDOMIZE_BASE
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/*
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* Assuming all cross the 512GB boundary:
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* 1 page for level4
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* (2+2)*4 pages for kernel, param, cmd_line, and randomized kernel
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* 2 pages for first 2M (video RAM: CONFIG_X86_VERBOSE_BOOTUP).
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* Total is 19 pages.
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*/
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# ifdef CONFIG_X86_VERBOSE_BOOTUP
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# define BOOT_PGT_SIZE (19*4096)
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# else /* !CONFIG_X86_VERBOSE_BOOTUP */
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# define BOOT_PGT_SIZE (17*4096)
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# endif
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# else /* !CONFIG_RANDOMIZE_BASE */
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# define BOOT_PGT_SIZE BOOT_INIT_PGT_SIZE
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# endif
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#else /* !CONFIG_X86_64 */
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# define BOOT_STACK_SIZE 0x1000
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#endif
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#ifndef __ASSEMBLY__
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extern unsigned int output_len;
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extern const unsigned long kernel_total_size;
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unsigned long decompress_kernel(unsigned char *outbuf, unsigned long virt_addr,
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void (*error)(char *x));
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#endif
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#endif /* _ASM_X86_BOOT_H */
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