197 lines
4.3 KiB
C
197 lines
4.3 KiB
C
/*
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* Copyright (C) 2018-2022 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/**
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* @file mmu.h
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*
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* @brief APIs for Memory Management module
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*/
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#ifndef MMU_H
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#define MMU_H
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/**
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* @brief Memory Management
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*
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* @defgroup acrn_mem ACRN Memory Management
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* @{
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*/
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/** The flag that indicates that the page fault was caused by a non present
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* page.
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*/
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#define PAGE_FAULT_P_FLAG 0x00000001U
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/** The flag that indicates that the page fault was caused by a write access. */
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#define PAGE_FAULT_WR_FLAG 0x00000002U
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/** The flag that indicates that the page fault was caused in user mode. */
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#define PAGE_FAULT_US_FLAG 0x00000004U
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/** The flag that indicates that the page fault was caused by a reserved bit
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* violation.
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*/
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#define PAGE_FAULT_RSVD_FLAG 0x00000008U
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/** The flag that indicates that the page fault was caused by an instruction
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* fetch.
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*/
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#define PAGE_FAULT_ID_FLAG 0x00000010U
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/* Defines used for common memory sizes */
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#define MEM_1K 1024U
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#define MEM_2K (MEM_1K * 2U)
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#define MEM_4K (MEM_1K * 4U)
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#define MEM_1M (MEM_1K * 1024U)
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#define MEM_2M (MEM_1M * 2U)
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#define MEM_1G (MEM_1M * 1024U)
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#define MEM_2G (MEM_1G * 2UL)
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#define MEM_4G (MEM_1G * 4UL)
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#ifndef ASSEMBLER
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#include <asm/page.h>
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#include <asm/pgtable.h>
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/* Define cache line size (in bytes) */
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#define CACHE_LINE_SIZE 64U
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/* IA32E Paging constants */
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#define IA32E_REF_MASK ((get_pcpu_info())->physical_address_mask)
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#define INVEPT_TYPE_SINGLE_CONTEXT 1UL
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#define INVEPT_TYPE_ALL_CONTEXTS 2UL
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#define VMFAIL_INVALID_EPT_VPID \
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" jnc 1f\n" \
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" mov $1, %0\n" /* CF: error = 1 */ \
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" jmp 3f\n" \
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"1: jnz 2f\n" \
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" mov $2, %0\n" /* ZF: error = 2 */ \
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" jmp 3f\n" \
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"2: mov $0, %0\n" \
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"3:"
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struct invvpid_operand {
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uint32_t vpid : 16;
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uint32_t rsvd1 : 16;
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uint32_t rsvd2 : 32;
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uint64_t gva;
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};
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static inline int32_t asm_invvpid(const struct invvpid_operand operand, uint64_t type)
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{
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int32_t error;
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asm volatile ("invvpid %1, %2\n"
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VMFAIL_INVALID_EPT_VPID
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: "=r" (error)
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: "m" (operand), "r" (type)
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: "memory");
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return error;
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}
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struct invept_desc {
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uint64_t eptp;
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uint64_t res;
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};
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static inline int32_t asm_invept(uint64_t type, struct invept_desc desc)
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{
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int32_t error;
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asm volatile ("invept %1, %2\n"
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VMFAIL_INVALID_EPT_VPID
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: "=r" (error)
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: "m" (desc), "r" (type)
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: "memory");
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return error;
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}
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struct acrn_vcpu;
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static inline uint64_t round_page_up(uint64_t addr)
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{
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return (((addr + (uint64_t)PAGE_SIZE) - 1UL) & PAGE_MASK);
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}
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static inline uint64_t round_page_down(uint64_t addr)
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{
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return (addr & PAGE_MASK);
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}
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static inline uint64_t round_pde_up(uint64_t val)
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{
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return (((val + (uint64_t)PDE_SIZE) - 1UL) & PDE_MASK);
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}
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static inline uint64_t round_pde_down(uint64_t val)
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{
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return (val & PDE_MASK);
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}
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/* Page size */
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#define PAGE_SIZE_4K MEM_4K
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#define PAGE_SIZE_2M MEM_2M
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#define PAGE_SIZE_1G MEM_1G
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/**
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* @brief MMU paging enable
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*/
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void enable_paging(void);
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/**
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* @brief Supervisor-mode execution prevention (SMEP) enable
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*/
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void enable_smep(void);
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/**
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* @brief Supervisor-mode Access Prevention (SMAP) enable
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*/
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void enable_smap(void);
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/**
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* @brief MMU page tables initialization
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*/
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void init_paging(void);
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/*
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* set paging attribute for primary page tables
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*/
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void set_paging_supervisor(uint64_t base, uint64_t size);
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void set_paging_x(uint64_t base, uint64_t size);
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void set_paging_nx(uint64_t base, uint64_t size);
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/**
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* @brief Specified signle VPID flush
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*
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* @param[in] vpid the specified VPID
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*/
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void flush_vpid_single(uint16_t vpid);
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/**
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* @brief All VPID flush
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*/
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void flush_vpid_global(void);
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/**
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* @brief Guest-physical mappings and combined mappings invalidation
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*
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* @param[in] eptp the pointer that points the eptp
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*/
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void invept(const void *eptp);
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uint64_t get_hv_ram_size(void);
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/* get PDPT address from CR3 vaule in PAE mode */
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static inline uint64_t get_pae_pdpt_addr(uint64_t cr3)
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{
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return (cr3 & 0xFFFFFFE0UL);
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}
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/*
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* flush TLB only for the specified page with the address
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*/
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void flush_tlb(uint64_t addr);
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void flush_tlb_range(uint64_t addr, uint64_t size);
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void flush_invalidate_all_cache(void);
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void flush_cacheline(const volatile void *p);
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void flush_cache_range(const volatile void *p, uint64_t size);
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void allocate_ppt_pages(void);
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/**
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* @}
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*/
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#endif /* ASSEMBLER not defined */
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#endif /* MMU_H */
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