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https://github.com/projectacrn/acrn-hypervisor.git
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38be61e374
Add free_page to free page when unmap pagetable. Signed-off-by: Li Fei1 <fei1.li@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com> Tracked-On: #5788
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef PAGE_H
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#define PAGE_H
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#include <spinlock.h>
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#include <board_info.h>
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#define PAGE_SHIFT 12U
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#define PAGE_SIZE (1U << PAGE_SHIFT)
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#define PAGE_MASK 0xFFFFFFFFFFFFF000UL
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#define MAXIMUM_PA_WIDTH 39U /* maximum physical-address width */
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/* size of the low MMIO address space: 2GB */
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#define PLATFORM_LO_MMIO_SIZE 0x80000000UL
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/* size of the high MMIO address space: 1GB */
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#define PLATFORM_HI_MMIO_SIZE 0x40000000UL
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#define PML4_PAGE_NUM(size) 1UL
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#define PDPT_PAGE_NUM(size) (((size) + PML4E_SIZE - 1UL) >> PML4E_SHIFT)
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#define PD_PAGE_NUM(size) (((size) + PDPTE_SIZE - 1UL) >> PDPTE_SHIFT)
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#define PT_PAGE_NUM(size) (((size) + PDE_SIZE - 1UL) >> PDE_SHIFT)
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/**
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* @brief Page tables level in IA32 paging mode
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*/
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enum _page_table_level {
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/**
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* @brief The PML4 level in the page tables
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*/
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IA32E_PML4 = 0,
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/**
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* @brief The Page-Directory-Pointer-Table level in the page tables
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*/
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IA32E_PDPT = 1,
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/**
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* @brief The Page-Directory level in the page tables
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*/
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IA32E_PD = 2,
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/**
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* @brief The Page-Table level in the page tables
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*/
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IA32E_PT = 3,
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};
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struct acrn_vm;
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struct page {
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uint8_t contents[PAGE_SIZE];
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} __aligned(PAGE_SIZE);
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struct page_pool {
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struct page *start_page;
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spinlock_t lock;
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uint64_t bitmap_size;
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uint64_t *bitmap;
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uint64_t last_hint_id;
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struct page *dummy_page;
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};
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struct memory_ops {
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struct page_pool *pool;
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bool (*large_page_support)(enum _page_table_level level);
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uint64_t (*get_default_access_right)(void);
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uint64_t (*pgentry_present)(uint64_t pte);
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void (*clflush_pagewalk)(const void *p);
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void (*tweak_exe_right)(uint64_t *entry);
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void (*recover_exe_right)(uint64_t *entry);
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};
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extern const struct memory_ops ppt_mem_ops;
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void init_ept_mem_ops(struct memory_ops *mem_ops, uint16_t vm_id);
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struct page *alloc_page(struct page_pool *pool);
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void free_page(struct page_pool *pool, struct page *page);
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void *get_reserve_sworld_memory_base(void);
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void reserve_buffer_for_ept_pages(void);
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#endif /* PAGE_H */
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