mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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a7373674bf
Acked-by: Alexander Egorenkov <egorenar@linux.ibm.com> Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*
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* zipl - zSeries Initial Program Loader tool
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*
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* os-info definitions
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*
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* Copyright IBM Corp. 2013, 2023
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef OS_INFO_H
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#define OS_INFO_H
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#include "lib/zt_common.h"
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#include "boot/error.h"
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#include "boot/s390.h"
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#include <stdint.h>
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#define OS_INFO_MAGIC 0x4f53494e464f535aULL /* OSINFOSZ */
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#define OS_INFO_CSUM_SIZE (sizeof(struct os_info) - offsetof(struct os_info, version_major))
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#define OS_INFO_FLAGS_ENTRY_SIZE (sizeof(unsigned long))
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#define OS_INFO_VMCOREINFO 0
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#define OS_INFO_REIPL_BLOCK 1
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#define OS_INFO_FLAGS_ENTRY 2
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#define OS_INFO_RESERVED 3
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#define OS_INFO_IDENTITY_BASE 4
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#define OS_INFO_KASLR_OFFSET 5
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#define OS_INFO_KASLR_OFF_PHYS 6
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#define OS_INFO_VMEMMAP 7
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#define OS_INFO_AMODE31_START 8
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#define OS_INFO_AMODE31_END 9
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#define OS_INFO_IMAGE_START 10
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#define OS_INFO_IMAGE_END 11
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#define OS_INFO_IMAGE_PHYS 12
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#define OS_INFO_MAX 13
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#define OS_INFO_FLAG_REIPL_CLEAR (1UL << 0)
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struct os_info_entry {
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union {
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uint64_t addr;
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uint64_t val;
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};
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uint64_t size;
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uint32_t csum;
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} __packed;
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struct os_info {
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uint64_t magic;
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uint32_t csum;
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uint16_t version_major;
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uint16_t version_minor;
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uint64_t crashkernel_addr;
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uint64_t crashkernel_size;
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struct os_info_entry entry[OS_INFO_MAX];
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uint8_t reserved[3804];
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} __packed;
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STATIC_ASSERT(sizeof(struct os_info) == 4096)
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/*
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* Return 0 in case of valid os_info
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* Return -EOS_INFO_MISSING if os_info address is not page aligned or page is
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* not accessible or os_info magic value is missing.
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* Return -EOS_INFO_CSUM_FAILED if os_info checksum is invalid.
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*/
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static inline int os_info_check(const struct os_info *os_info)
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{
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if (!os_info ||
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(unsigned long)os_info % PAGE_SIZE ||
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!page_is_valid((unsigned long)os_info) ||
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os_info->magic != OS_INFO_MAGIC)
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return -EOS_INFO_MISSING;
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if (os_info->csum != csum_partial(&os_info->version_major, OS_INFO_CSUM_SIZE, 0))
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return -EOS_INFO_CSUM_FAILED;
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return 0;
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}
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/*
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* Return 1 in case of valid os_info_entry, otherwise 0
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* Make sure that the entire os_info structure is checked first with os_info_check().
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*/
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static inline int os_info_entry_is_valid(const struct os_info_entry *entry)
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{
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return (entry &&
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entry->addr &&
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entry->size &&
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page_is_valid(entry->addr) &&
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entry->csum == csum_partial((void *)entry->addr, entry->size, 0));
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}
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#endif /* OS_INFO_H */
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