b099155e2d
Disable the exception handling before booting the kernel to make sure any exceptions that happen during early kernel boot are not directed to the pre-decompression code. Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20210312123824.306-2-joro@8bytes.org
171 lines
4.1 KiB
C
171 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef BOOT_COMPRESSED_MISC_H
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#define BOOT_COMPRESSED_MISC_H
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/*
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* Special hack: we have to be careful, because no indirections are allowed here,
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* and paravirt_ops is a kind of one. As it will only run in baremetal anyway,
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* we just keep it from happening. (This list needs to be extended when new
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* paravirt and debugging variants are added.)
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*/
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#undef CONFIG_PARAVIRT
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#undef CONFIG_PARAVIRT_XXL
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#undef CONFIG_PARAVIRT_SPINLOCKS
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#undef CONFIG_KASAN
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#undef CONFIG_KASAN_GENERIC
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/* cpu_feature_enabled() cannot be used this early */
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#define USE_EARLY_PGTABLE_L5
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#include <linux/linkage.h>
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#include <linux/screen_info.h>
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#include <linux/elf.h>
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#include <linux/io.h>
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#include <asm/page.h>
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#include <asm/boot.h>
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#include <asm/bootparam.h>
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#include <asm/desc_defs.h>
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#define BOOT_CTYPE_H
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#include <linux/acpi.h>
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#define BOOT_BOOT_H
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#include "../ctype.h"
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#ifdef CONFIG_X86_64
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#define memptr long
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#else
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#define memptr unsigned
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#endif
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/* boot/compressed/vmlinux start and end markers */
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extern char _head[], _end[];
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/* misc.c */
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extern memptr free_mem_ptr;
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extern memptr free_mem_end_ptr;
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extern struct boot_params *boot_params;
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void __putstr(const char *s);
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void __puthex(unsigned long value);
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#define error_putstr(__x) __putstr(__x)
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#define error_puthex(__x) __puthex(__x)
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#ifdef CONFIG_X86_VERBOSE_BOOTUP
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#define debug_putstr(__x) __putstr(__x)
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#define debug_puthex(__x) __puthex(__x)
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#define debug_putaddr(__x) { \
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debug_putstr(#__x ": 0x"); \
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debug_puthex((unsigned long)(__x)); \
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debug_putstr("\n"); \
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}
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#else
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static inline void debug_putstr(const char *s)
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{ }
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static inline void debug_puthex(unsigned long value)
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{ }
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#define debug_putaddr(x) /* */
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#endif
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/* cmdline.c */
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int cmdline_find_option(const char *option, char *buffer, int bufsize);
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int cmdline_find_option_bool(const char *option);
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struct mem_vector {
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u64 start;
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u64 size;
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};
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#if CONFIG_RANDOMIZE_BASE
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/* kaslr.c */
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void choose_random_location(unsigned long input,
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unsigned long input_size,
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unsigned long *output,
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unsigned long output_size,
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unsigned long *virt_addr);
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#else
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static inline void choose_random_location(unsigned long input,
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unsigned long input_size,
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unsigned long *output,
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unsigned long output_size,
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unsigned long *virt_addr)
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{
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}
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#endif
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/* cpuflags.c */
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bool has_cpuflag(int flag);
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#ifdef CONFIG_X86_64
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extern int set_page_decrypted(unsigned long address);
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extern int set_page_encrypted(unsigned long address);
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extern int set_page_non_present(unsigned long address);
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extern unsigned char _pgtable[];
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#endif
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#ifdef CONFIG_EARLY_PRINTK
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/* early_serial_console.c */
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extern int early_serial_base;
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void console_init(void);
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#else
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static const int early_serial_base;
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static inline void console_init(void)
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{ }
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#endif
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void set_sev_encryption_mask(void);
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#ifdef CONFIG_AMD_MEM_ENCRYPT
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void sev_es_shutdown_ghcb(void);
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extern bool sev_es_check_ghcb_fault(unsigned long address);
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#else
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static inline void sev_es_shutdown_ghcb(void) { }
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static inline bool sev_es_check_ghcb_fault(unsigned long address)
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{
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return false;
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}
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#endif
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/* acpi.c */
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#ifdef CONFIG_ACPI
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acpi_physical_address get_rsdp_addr(void);
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#else
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static inline acpi_physical_address get_rsdp_addr(void) { return 0; }
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#endif
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#if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI)
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extern struct mem_vector immovable_mem[MAX_NUMNODES*2];
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int count_immovable_mem_regions(void);
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#else
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static inline int count_immovable_mem_regions(void) { return 0; }
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#endif
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/* ident_map_64.c */
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#ifdef CONFIG_X86_5LEVEL
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extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d;
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#endif
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/* Used by PAGE_KERN* macros: */
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extern pteval_t __default_kernel_pte_mask;
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/* idt_64.c */
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extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
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extern struct desc_ptr boot_idt_desc;
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#ifdef CONFIG_X86_64
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void cleanup_exception_handling(void);
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#else
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static inline void cleanup_exception_handling(void) { }
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#endif
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/* IDT Entry Points */
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void boot_page_fault(void);
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void boot_stage1_vc(void);
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void boot_stage2_vc(void);
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unsigned long sev_verify_cbit(unsigned long cr3);
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#endif /* BOOT_COMPRESSED_MISC_H */
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