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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/suspend_64.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/suspend_64.h')
-rw-r--r-- | arch/x86/include/asm/suspend_64.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/x86/include/asm/suspend_64.h b/arch/x86/include/asm/suspend_64.h new file mode 100644 index 0000000000..54df06687d --- /dev/null +++ b/arch/x86/include/asm/suspend_64.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2001-2003 Pavel Machek <pavel@suse.cz> + * Based on code + * Copyright 2001 Patrick Mochel <mochel@osdl.org> + */ +#ifndef _ASM_X86_SUSPEND_64_H +#define _ASM_X86_SUSPEND_64_H + +#include <asm/desc.h> +#include <asm/fpu/api.h> + +/* + * Image of the saved processor state, used by the low level ACPI suspend to + * RAM code and by the low level hibernation code. + * + * If you modify it, check how it is used in arch/x86/kernel/acpi/wakeup_64.S + * and make sure that __save/__restore_processor_state(), defined in + * arch/x86/power/cpu.c, still work as required. + * + * Because the structure is packed, make sure to avoid unaligned members. For + * optimisation purposes but also because tools like kmemleak only search for + * pointers that are aligned. + */ +struct saved_context { + struct pt_regs regs; + + /* + * User CS and SS are saved in current_pt_regs(). The rest of the + * segment selectors need to be saved and restored here. + */ + u16 ds, es, fs, gs; + + /* + * Usermode FSBASE and GSBASE may not match the fs and gs selectors, + * so we save them separately. We save the kernelmode GSBASE to + * restore percpu access after resume. + */ + unsigned long kernelmode_gs_base, usermode_gs_base, fs_base; + + unsigned long cr0, cr2, cr3, cr4; + u64 misc_enable; + struct saved_msrs saved_msrs; + unsigned long efer; + u16 gdt_pad; /* Unused */ + struct desc_ptr gdt_desc; + u16 idt_pad; + struct desc_ptr idt; + u16 ldt; + u16 tss; + unsigned long tr; + unsigned long safety; + unsigned long return_address; + bool misc_enable_saved; +} __attribute__((packed)); + +#define loaddebug(thread,register) \ + set_debugreg((thread)->debugreg##register, register) + +/* routines for saving/restoring kernel state */ +extern char core_restore_code[]; +extern char restore_registers[]; + +#endif /* _ASM_X86_SUSPEND_64_H */ |