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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/x86/include/asm/realmode.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/include/asm/realmode.h')
-rw-r--r-- | arch/x86/include/asm/realmode.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/x86/include/asm/realmode.h b/arch/x86/include/asm/realmode.h new file mode 100644 index 0000000000..87e5482acd --- /dev/null +++ b/arch/x86/include/asm/realmode.h @@ -0,0 +1,100 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ARCH_X86_REALMODE_H +#define _ARCH_X86_REALMODE_H + +/* + * Flag bit definitions for use with the flags field of the trampoline header + * in the CONFIG_X86_64 variant. + */ +#define TH_FLAGS_SME_ACTIVE_BIT 0 +#define TH_FLAGS_SME_ACTIVE BIT(TH_FLAGS_SME_ACTIVE_BIT) + +#ifndef __ASSEMBLY__ + +#include <linux/types.h> +#include <asm/io.h> + +/* This must match data at realmode/rm/header.S */ +struct real_mode_header { + u32 text_start; + u32 ro_end; + /* SMP trampoline */ + u32 trampoline_start; + u32 trampoline_header; +#ifdef CONFIG_AMD_MEM_ENCRYPT + u32 sev_es_trampoline_start; +#endif +#ifdef CONFIG_X86_64 + u32 trampoline_start64; + u32 trampoline_pgd; +#endif + /* ACPI S3 wakeup */ +#ifdef CONFIG_ACPI_SLEEP + u32 wakeup_start; + u32 wakeup_header; +#endif + /* APM/BIOS reboot */ + u32 machine_real_restart_asm; +#ifdef CONFIG_X86_64 + u32 machine_real_restart_seg; +#endif +}; + +/* This must match data at realmode/rm/trampoline_{32,64}.S */ +struct trampoline_header { +#ifdef CONFIG_X86_32 + u32 start; + u16 gdt_pad; + u16 gdt_limit; + u32 gdt_base; +#else + u64 start; + u64 efer; + u32 cr4; + u32 flags; + u32 lock; +#endif +}; + +extern struct real_mode_header *real_mode_header; +extern unsigned char real_mode_blob_end[]; + +extern unsigned long initial_code; +extern unsigned long initial_stack; +#ifdef CONFIG_AMD_MEM_ENCRYPT +extern unsigned long initial_vc_handler; +#endif + +extern u32 *trampoline_lock; + +extern unsigned char real_mode_blob[]; +extern unsigned char real_mode_relocs[]; + +#ifdef CONFIG_X86_32 +extern unsigned char startup_32_smp[]; +extern unsigned char boot_gdt[]; +#else +extern unsigned char secondary_startup_64[]; +extern unsigned char secondary_startup_64_no_verify[]; +#endif + +static inline size_t real_mode_size_needed(void) +{ + if (real_mode_header) + return 0; /* already allocated. */ + + return ALIGN(real_mode_blob_end - real_mode_blob, PAGE_SIZE); +} + +static inline void set_real_mode_mem(phys_addr_t mem) +{ + real_mode_header = (struct real_mode_header *) __va(mem); +} + +void reserve_real_mode(void); +void load_trampoline_pgtable(void); +void init_real_mode(void); + +#endif /* __ASSEMBLY__ */ + +#endif /* _ARCH_X86_REALMODE_H */ |