KVM: Use slab caches to allocate mmu data structures

[safe/jmp/linux-2.6] / drivers / kvm / kvm.h

diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 7866b34..b9c318a 100644 (file)
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -51,6 +51,7 @@
 #define UNMAPPED_GVA (~(gpa_t)0)
 
 #define KVM_MAX_VCPUS 1
+#define KVM_ALIAS_SLOTS 4
 #define KVM_MEMORY_SLOTS 4
 #define KVM_NUM_MMU_PAGES 256
 #define KVM_MIN_FREE_MMU_PAGES 5
@@ -109,6 +110,7 @@ struct kvm_pte_chain {
  *   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)
+ *   bits 17:18 - "access" - the user and writable bits of a huge page pde
  */
 union kvm_mmu_page_role {
        unsigned word;
@@ -118,6 +120,7 @@ union kvm_mmu_page_role {
                unsigned quadrant : 2;
                unsigned pad_for_nice_hex_output : 6;
                unsigned metaphysical : 1;
+               unsigned hugepage_access : 2;
        };
 };
 
@@ -136,7 +139,6 @@ struct kvm_mmu_page {
        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 */
        int multimapped;         /* More than one parent_pte? */
        int root_count;          /* Currently serving as active root */
        union {
@@ -243,6 +245,7 @@ struct kvm_vcpu {
        struct mutex mutex;
        int   cpu;
        int   launched;
+       u64 host_tsc;
        struct kvm_run *run;
        int interrupt_window_open;
        unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
@@ -310,6 +313,12 @@ struct kvm_vcpu {
        struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
 };
 
+struct kvm_mem_alias {
+       gfn_t base_gfn;
+       unsigned long npages;
+       gfn_t target_gfn;
+};
+
 struct kvm_memory_slot {
        gfn_t base_gfn;
        unsigned long npages;
@@ -320,6 +329,8 @@ struct kvm_memory_slot {
 
 struct kvm {
        spinlock_t lock; /* protects everything except vcpus */
+       int naliases;
+       struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
        int nmemslots;
        struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
        /*
@@ -384,8 +395,6 @@ struct kvm_arch_ops {
        void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
        void (*decache_cr0_cr4_guest_bits)(struct kvm_vcpu *vcpu);
        void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
-       void (*set_cr0_no_modeswitch)(struct kvm_vcpu *vcpu,
-                                     unsigned long cr0);
        void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
        void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
        void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
@@ -424,12 +433,16 @@ extern struct kvm_arch_ops *kvm_arch_ops;
 int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
 void kvm_exit_arch(void);
 
+int kvm_mmu_module_init(void);
+void kvm_mmu_module_exit(void);
+
 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
 int kvm_mmu_create(struct kvm_vcpu *vcpu);
 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 
 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);
+void kvm_mmu_zap_all(struct kvm_vcpu *vcpu);
 
 hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
@@ -442,11 +455,7 @@ void kvm_emulator_want_group7_invlpg(void);
 
 extern hpa_t bad_page_address;
 
-static inline struct page *gfn_to_page(struct kvm_memory_slot *slot, gfn_t gfn)
-{
-       return slot->phys_mem[gfn - slot->base_gfn];
-}
-
+struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 
@@ -522,12 +531,6 @@ static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
        return vcpu->mmu.page_fault(vcpu, gva, error_code);
 }
 
-static inline struct page *_gfn_to_page(struct kvm *kvm, gfn_t gfn)
-{
-       struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn);
-       return (slot) ? slot->phys_mem[gfn - slot->base_gfn] : NULL;
-}
-
 static inline int is_long_mode(struct kvm_vcpu *vcpu)
 {
 #ifdef CONFIG_X86_64