diff options
Diffstat (limited to 'drivers/kvm/kvm.h')
| -rw-r--r-- | drivers/kvm/kvm.h | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index abe40dd34eea..58b9deb0bc0e 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -89,14 +89,53 @@ typedef unsigned long hva_t; typedef u64 hpa_t; typedef unsigned long hfn_t; +#define NR_PTE_CHAIN_ENTRIES 5 + +struct kvm_pte_chain { + u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES]; + struct hlist_node link; +}; + +/* + * kvm_mmu_page_role, below, is defined as: + * + * bits 0:3 - total guest paging levels (2-4, or zero for real mode) + * bits 4:7 - page table level for this shadow (1-4) + * bits 8:9 - page table quadrant for 2-level guests + * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode) + */ +union kvm_mmu_page_role { + unsigned word; + struct { + unsigned glevels : 4; + unsigned level : 4; + unsigned quadrant : 2; + unsigned pad_for_nice_hex_output : 6; + unsigned metaphysical : 1; + }; +}; + struct kvm_mmu_page { struct list_head link; + struct hlist_node hash_link; + + /* + * The following two entries are used to key the shadow page in the + * hash table. + */ + gfn_t gfn; + union kvm_mmu_page_role role; + hpa_t page_hpa; unsigned long slot_bitmap; /* One bit set per slot which has memory * in this shadow page. */ int global; /* Set if all ptes in this page are global */ - u64 *parent_pte; + int multimapped; /* More than one parent_pte? */ + union { + u64 *parent_pte; /* !multimapped */ + struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */ + }; }; struct vmcs { @@ -235,7 +274,11 @@ struct kvm { spinlock_t lock; /* protects everything except vcpus */ int nmemslots; struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS]; + /* + * Hash table of struct kvm_mmu_page. + */ struct list_head active_mmu_pages; + struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; struct kvm_vcpu vcpus[KVM_MAX_VCPUS]; int memory_config_version; int busy; |