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95 lines
2.0 KiB
95 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ARCH_X86_REALMODE_H |
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#define _ARCH_X86_REALMODE_H |
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/* |
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* Flag bit definitions for use with the flags field of the trampoline header |
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* in the CONFIG_X86_64 variant. |
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*/ |
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#define TH_FLAGS_SME_ACTIVE_BIT 0 |
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#define TH_FLAGS_SME_ACTIVE BIT(TH_FLAGS_SME_ACTIVE_BIT) |
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#ifndef __ASSEMBLY__ |
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#include <linux/types.h> |
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#include <asm/io.h> |
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/* This must match data at realmode/rm/header.S */ |
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struct real_mode_header { |
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u32 text_start; |
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u32 ro_end; |
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/* SMP trampoline */ |
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u32 trampoline_start; |
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u32 trampoline_header; |
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#ifdef CONFIG_AMD_MEM_ENCRYPT |
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u32 sev_es_trampoline_start; |
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#endif |
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#ifdef CONFIG_X86_64 |
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u32 trampoline_pgd; |
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#endif |
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/* ACPI S3 wakeup */ |
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#ifdef CONFIG_ACPI_SLEEP |
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u32 wakeup_start; |
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u32 wakeup_header; |
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#endif |
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/* APM/BIOS reboot */ |
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u32 machine_real_restart_asm; |
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#ifdef CONFIG_X86_64 |
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u32 machine_real_restart_seg; |
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#endif |
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}; |
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/* This must match data at realmode/rm/trampoline_{32,64}.S */ |
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struct trampoline_header { |
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#ifdef CONFIG_X86_32 |
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u32 start; |
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u16 gdt_pad; |
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u16 gdt_limit; |
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u32 gdt_base; |
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#else |
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u64 start; |
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u64 efer; |
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u32 cr4; |
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u32 flags; |
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#endif |
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}; |
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extern struct real_mode_header *real_mode_header; |
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extern unsigned char real_mode_blob_end[]; |
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extern unsigned long initial_code; |
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extern unsigned long initial_gs; |
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extern unsigned long initial_stack; |
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#ifdef CONFIG_AMD_MEM_ENCRYPT |
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extern unsigned long initial_vc_handler; |
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#endif |
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extern unsigned char real_mode_blob[]; |
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extern unsigned char real_mode_relocs[]; |
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#ifdef CONFIG_X86_32 |
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extern unsigned char startup_32_smp[]; |
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extern unsigned char boot_gdt[]; |
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#else |
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extern unsigned char secondary_startup_64[]; |
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extern unsigned char secondary_startup_64_no_verify[]; |
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#endif |
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static inline size_t real_mode_size_needed(void) |
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{ |
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if (real_mode_header) |
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return 0; /* already allocated. */ |
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return ALIGN(real_mode_blob_end - real_mode_blob, PAGE_SIZE); |
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} |
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static inline void set_real_mode_mem(phys_addr_t mem) |
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{ |
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real_mode_header = (struct real_mode_header *) __va(mem); |
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} |
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void reserve_real_mode(void); |
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#endif /* __ASSEMBLY__ */ |
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#endif /* _ARCH_X86_REALMODE_H */
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