/* * Copyright(c) 2011-2016 Intel Corporation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Authors: * Zhi Wang * Zhenyu Wang * Xiao Zheng * * Contributors: * Min He * Bing Niu * */ #ifndef _GVT_GTT_H_ #define _GVT_GTT_H_ #define GTT_PAGE_SHIFT 12 #define GTT_PAGE_SIZE (1UL << GTT_PAGE_SHIFT) #define GTT_PAGE_MASK (~(GTT_PAGE_SIZE-1)) struct intel_vgpu_mm; #define INTEL_GVT_GTT_HASH_BITS 8 #define INTEL_GVT_INVALID_ADDR (~0UL) struct intel_gvt_gtt_entry { u64 val64; int type; }; struct intel_gvt_gtt_pte_ops { struct intel_gvt_gtt_entry *(*get_entry)(void *pt, struct intel_gvt_gtt_entry *e, unsigned long index, bool hypervisor_access, unsigned long gpa, struct intel_vgpu *vgpu); struct intel_gvt_gtt_entry *(*set_entry)(void *pt, struct intel_gvt_gtt_entry *e, unsigned long index, bool hypervisor_access, unsigned long gpa, struct intel_vgpu *vgpu); bool (*test_present)(struct intel_gvt_gtt_entry *e); void (*clear_present)(struct intel_gvt_gtt_entry *e); bool (*test_pse)(struct intel_gvt_gtt_entry *e); void (*set_pfn)(struct intel_gvt_gtt_entry *e, unsigned long pfn); unsigned long (*get_pfn)(struct intel_gvt_gtt_entry *e); }; struct intel_gvt_gtt_gma_ops { unsigned long (*gma_to_ggtt_pte_index)(unsigned long gma); unsigned long (*gma_to_pte_index)(unsigned long gma); unsigned long (*gma_to_pde_index)(unsigned long gma); unsigned long (*gma_to_l3_pdp_index)(unsigned long gma); unsigned long (*gma_to_l4_pdp_index)(unsigned long gma); unsigned long (*gma_to_pml4_index)(unsigned long gma); }; struct intel_gvt_gtt { struct intel_gvt_gtt_pte_ops *pte_ops; struct intel_gvt_gtt_gma_ops *gma_ops; int (*mm_alloc_page_table)(struct intel_vgpu_mm *mm); void (*mm_free_page_table)(struct intel_vgpu_mm *mm); struct list_head oos_page_use_list_head; struct list_head oos_page_free_list_head; struct list_head mm_lru_list_head; }; enum { INTEL_GVT_MM_GGTT = 0, INTEL_GVT_MM_PPGTT, }; typedef enum { GTT_TYPE_INVALID = -1, GTT_TYPE_GGTT_PTE, GTT_TYPE_PPGTT_PTE_4K_ENTRY, GTT_TYPE_PPGTT_PTE_2M_ENTRY, GTT_TYPE_PPGTT_PTE_1G_ENTRY, GTT_TYPE_PPGTT_PTE_ENTRY, GTT_TYPE_PPGTT_PDE_ENTRY, GTT_TYPE_PPGTT_PDP_ENTRY, GTT_TYPE_PPGTT_PML4_ENTRY, GTT_TYPE_PPGTT_ROOT_ENTRY, GTT_TYPE_PPGTT_ROOT_L3_ENTRY, GTT_TYPE_PPGTT_ROOT_L4_ENTRY, GTT_TYPE_PPGTT_ENTRY, GTT_TYPE_PPGTT_PTE_PT, GTT_TYPE_PPGTT_PDE_PT, GTT_TYPE_PPGTT_PDP_PT, GTT_TYPE_PPGTT_PML4_PT, GTT_TYPE_MAX, } intel_gvt_gtt_type_t; struct intel_vgpu_mm { int type; bool initialized; bool shadowed; int page_table_entry_type; u32 page_table_entry_size; u32 page_table_entry_cnt; void *virtual_page_table; void *shadow_page_table; int page_table_level; bool has_shadow_page_table; u32 pde_base_index; struct list_head list; struct kref ref; atomic_t pincount; struct list_head lru_list; struct intel_vgpu *vgpu; }; extern struct intel_gvt_gtt_entry *intel_vgpu_mm_get_entry( struct intel_vgpu_mm *mm, void *page_table, struct intel_gvt_gtt_entry *e, unsigned long index); extern struct intel_gvt_gtt_entry *intel_vgpu_mm_set_entry( struct intel_vgpu_mm *mm, void *page_table, struct intel_gvt_gtt_entry *e, unsigned long index); #define ggtt_get_guest_entry(mm, e, index) \ intel_vgpu_mm_get_entry(mm, mm->virtual_page_table, e, index) #define ggtt_set_guest_entry(mm, e, index) \ intel_vgpu_mm_set_entry(mm, mm->virtual_page_table, e, index) #define ggtt_get_shadow_entry(mm, e, index) \ intel_vgpu_mm_get_entry(mm, mm->shadow_page_table, e, index) #define ggtt_set_shadow_entry(mm, e, index) \ intel_vgpu_mm_set_entry(mm, mm->shadow_page_table, e, index) #define ppgtt_get_guest_root_entry(mm, e, index) \ intel_vgpu_mm_get_entry(mm, mm->virtual_page_table, e, index) #define ppgtt_set_guest_root_entry(mm, e, index) \ intel_vgpu_mm_set_entry(mm, mm->virtual_page_table, e, index) #define ppgtt_get_shadow_root_entry(mm, e, index) \ intel_vgpu_mm_get_entry(mm, mm->shadow_page_table, e, index) #define ppgtt_set_shadow_root_entry(mm, e, index) \ intel_vgpu_mm_set_entry(mm, mm->shadow_page_table, e, index) extern struct intel_vgpu_mm *intel_vgpu_create_mm(struct intel_vgpu *vgpu, int mm_type, void *virtual_page_table, int page_table_level, u32 pde_base_index); extern void intel_vgpu_destroy_mm(struct kref *mm_ref); struct intel_vgpu_guest_page; struct intel_vgpu_scratch_pt { struct page *page; unsigned long page_mfn; }; struct intel_vgpu_gtt { struct intel_vgpu_mm *ggtt_mm; unsigned long active_ppgtt_mm_bitmap; struct list_head mm_list_head; DECLARE_HASHTABLE(shadow_page_hash_table, INTEL_GVT_GTT_HASH_BITS); DECLARE_HASHTABLE(guest_page_hash_table, INTEL_GVT_GTT_HASH_BITS); atomic_t n_write_protected_guest_page; struct list_head oos_page_list_head; struct list_head post_shadow_list_head; struct intel_vgpu_scratch_pt scratch_pt[GTT_TYPE_MAX]; }; extern int intel_vgpu_init_gtt(struct intel_vgpu *vgpu); extern void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu); extern int intel_gvt_init_gtt(struct intel_gvt *gvt); extern void intel_gvt_clean_gtt(struct intel_gvt *gvt); extern struct intel_vgpu_mm *intel_gvt_find_ppgtt_mm(struct intel_vgpu *vgpu, int page_table_level, void *root_entry); struct intel_vgpu_oos_page; struct intel_vgpu_shadow_page { void *vaddr; struct page *page; int type; struct hlist_node node; unsigned long mfn; }; struct intel_vgpu_guest_page { struct hlist_node node; bool writeprotection; unsigned long gfn; int (*handler)(void *, u64, void *, int); void *data; unsigned long write_cnt; struct intel_vgpu_oos_page *oos_page; }; struct intel_vgpu_oos_page { struct intel_vgpu_guest_page *guest_page; struct list_head list; struct list_head vm_list; int id; unsigned char mem[GTT_PAGE_SIZE]; }; #define GTT_ENTRY_NUM_IN_ONE_PAGE 512 struct intel_vgpu_ppgtt_spt { struct intel_vgpu_shadow_page shadow_page; struct intel_vgpu_guest_page guest_page; int guest_page_type; atomic_t refcount; struct intel_vgpu *vgpu; DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE); struct list_head post_shadow_list; }; int intel_vgpu_init_guest_page(struct intel_vgpu *vgpu, struct intel_vgpu_guest_page *guest_page, unsigned long gfn, int (*handler)(void *gp, u64, void *, int), void *data); void intel_vgpu_clean_guest_page(struct intel_vgpu *vgpu, struct intel_vgpu_guest_page *guest_page); int intel_vgpu_set_guest_page_writeprotection(struct intel_vgpu *vgpu, struct intel_vgpu_guest_page *guest_page); void intel_vgpu_clear_guest_page_writeprotection(struct intel_vgpu *vgpu, struct intel_vgpu_guest_page *guest_page); struct intel_vgpu_guest_page *intel_vgpu_find_guest_page( struct intel_vgpu *vgpu, unsigned long gfn); int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu); int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu); static inline void intel_gvt_mm_reference(struct intel_vgpu_mm *mm) { kref_get(&mm->ref); } static inline void intel_gvt_mm_unreference(struct intel_vgpu_mm *mm) { kref_put(&mm->ref, intel_vgpu_destroy_mm); } int intel_vgpu_pin_mm(struct intel_vgpu_mm *mm); void intel_vgpu_unpin_mm(struct intel_vgpu_mm *mm); unsigned long intel_vgpu_gma_to_gpa(struct intel_vgpu_mm *mm, unsigned long gma); struct intel_vgpu_mm *intel_vgpu_find_ppgtt_mm(struct intel_vgpu *vgpu, int page_table_level, void *root_entry); int intel_vgpu_g2v_create_ppgtt_mm(struct intel_vgpu *vgpu, int page_table_level); int intel_vgpu_g2v_destroy_ppgtt_mm(struct intel_vgpu *vgpu, int page_table_level); int intel_vgpu_emulate_gtt_mmio_read(struct intel_vgpu *vgpu, unsigned int off, void *p_data, unsigned int bytes); int intel_vgpu_emulate_gtt_mmio_write(struct intel_vgpu *vgpu, unsigned int off, void *p_data, unsigned int bytes); #endif /* _GVT_GTT_H_ */