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9af310ef10
Currently, decompression error messages can be very uninformative: [ 0.029853] startup: read error [ 0.040507] startup: -- System halted Improve these messages to make it clear that the error originates from the decompression code. Additionally, on decompression failures, if bootdebug is enabled, dump the message ring buffer before halting. This provides more context for diagnosing startup issues. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Definitions and wrapper functions for kernel decompressor
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*
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* Copyright IBM Corp. 2010
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*
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <asm/boot_data.h>
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#include <asm/page.h>
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#include "decompressor.h"
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#include "boot.h"
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/*
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* gzip declarations
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*/
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#define STATIC static
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#undef memset
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#undef memcpy
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#undef memmove
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#define memmove memmove
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#define memzero(s, n) memset((s), 0, (n))
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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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#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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static unsigned long free_mem_ptr = (unsigned long) _end;
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static unsigned long free_mem_end_ptr = (unsigned long) _end + BOOT_HEAP_SIZE;
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#ifdef CONFIG_KERNEL_GZIP
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#include "../../../../lib/decompress_inflate.c"
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#endif
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#ifdef CONFIG_KERNEL_BZIP2
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#include "../../../../lib/decompress_bunzip2.c"
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#endif
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#ifdef CONFIG_KERNEL_LZ4
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#include "../../../../lib/decompress_unlz4.c"
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#endif
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#ifdef CONFIG_KERNEL_LZMA
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#include "../../../../lib/decompress_unlzma.c"
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#endif
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#ifdef CONFIG_KERNEL_LZO
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#include "../../../../lib/decompress_unlzo.c"
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#endif
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#ifdef CONFIG_KERNEL_XZ
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#include "../../../../lib/decompress_unxz.c"
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#endif
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#ifdef CONFIG_KERNEL_ZSTD
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#include "../../../../lib/decompress_unzstd.c"
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#endif
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static void decompress_error(char *m)
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{
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if (bootdebug)
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boot_rb_dump();
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boot_emerg("Decompression error: %s\n", m);
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boot_emerg(" -- System halted\n");
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disabled_wait();
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}
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unsigned long mem_safe_offset(void)
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{
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return ALIGN(free_mem_end_ptr, PAGE_SIZE);
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}
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void deploy_kernel(void *output)
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{
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__decompress(_compressed_start, _compressed_end - _compressed_start,
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NULL, NULL, output, vmlinux.image_size, NULL, decompress_error);
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}
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