/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_PAGE_64_DEFS_H
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#define _ASM_X86_PAGE_64_DEFS_H
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#ifndef __ASSEMBLY__
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#include <asm/kaslr.h>
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#endif
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#ifdef CONFIG_KASAN
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#define KASAN_STACK_ORDER 1
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#else
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#define KASAN_STACK_ORDER 0
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#endif
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#define THREAD_SIZE_ORDER (2 + KASAN_STACK_ORDER)
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#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
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#define CURRENT_MASK (~(THREAD_SIZE - 1))
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#define EXCEPTION_STACK_ORDER (1 + KASAN_STACK_ORDER)
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#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
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#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
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#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
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#define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER)
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#define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER)
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#define DOUBLEFAULT_STACK 1
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#define NMI_STACK 2
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#define DEBUG_STACK 3
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#define MCE_STACK 4
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#define N_EXCEPTION_STACKS 4 /* hw limit: 7 */
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/*
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* Set __PAGE_OFFSET to the most negative possible address +
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* PGDIR_SIZE*17 (pgd slot 273).
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*
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* The gap is to allow a space for LDT remap for PTI (1 pgd slot) and space for
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* a hypervisor (16 slots). Choosing 16 slots for a hypervisor is arbitrary,
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* but it's what Xen requires.
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*/
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#define __PAGE_OFFSET_BASE_L5 _AC(0xff11000000000000, UL)
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#define __PAGE_OFFSET_BASE_L4 _AC(0xffff888000000000, UL)
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#ifdef CONFIG_DYNAMIC_MEMORY_LAYOUT
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#define __PAGE_OFFSET page_offset_base
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#else
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#define __PAGE_OFFSET __PAGE_OFFSET_BASE_L4
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#endif /* CONFIG_DYNAMIC_MEMORY_LAYOUT */
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#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
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/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
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#define __PHYSICAL_MASK_SHIFT 52
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#ifdef CONFIG_X86_5LEVEL
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#define __VIRTUAL_MASK_SHIFT (pgtable_l5_enabled() ? 56 : 47)
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#else
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#define __VIRTUAL_MASK_SHIFT 47
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#endif
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/*
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* Kernel image size is limited to 1GiB due to the fixmap living in the
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* next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use
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* 512MiB by default, leaving 1.5GiB for modules once the page tables
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* are fully set up. If kernel ASLR is configured, it can extend the
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* kernel page table mapping, reducing the size of the modules area.
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*/
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#if defined(CONFIG_RANDOMIZE_BASE)
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#define KERNEL_IMAGE_SIZE (1024 * 1024 * 1024)
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#else
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#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
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#endif
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#endif /* _ASM_X86_PAGE_64_DEFS_H */
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