1 files changed, 95 insertions, 7 deletions

diff --git a/drivers/kvm/x86.h b/drivers/kvm/x86.h
index 0da4be9b0bad..a0dd4473b8f8 100644
--- a/drivers/kvm/x86.h
+++ b/drivers/kvm/x86.h
@@ -11,8 +11,6 @@
 #ifndef KVM_X86_H
 #define KVM_X86_H
 
-#include "kvm.h"
-
 #include <linux/types.h>
 #include <linux/mm.h>
 
@@ -21,6 +19,8 @@
 
 #include <asm/desc.h>
 
+#include "types.h"
+
 #define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
 #define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
 #define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
@@ -54,9 +54,19 @@
 
 #define IOPL_SHIFT 12
 
+#define KVM_PERMILLE_MMU_PAGES 20
+#define KVM_MIN_ALLOC_MMU_PAGES 64
+#define KVM_NUM_MMU_PAGES 1024
+#define KVM_MIN_FREE_MMU_PAGES 5
+#define KVM_REFILL_PAGES 25
+#define KVM_MAX_CPUID_ENTRIES 40
+
 extern spinlock_t kvm_lock;
 extern struct list_head vm_list;
 
+struct kvm_vcpu;
+struct kvm;
+
 enum {
         VCPU_REGS_RAX = 0,
         VCPU_REGS_RCX = 1,
@@ -92,6 +102,89 @@ enum {
 
 #include "x86_emulate.h"
 
+#define KVM_NR_MEM_OBJS 40
+
+/*
+ * We don't want allocation failures within the mmu code, so we preallocate
+ * enough memory for a single page fault in a cache.
+ */
+struct kvm_mmu_memory_cache {
+        int nobjs;
+        void *objects[KVM_NR_MEM_OBJS];
+};
+
+#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)
+ *   bits 17:19 - common access permissions for all ptes in this shadow page
+ */
+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;
+                unsigned access : 3;
+        };
+};
+
+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;
+
+        u64 *spt;
+        /* hold the gfn of each spte inside spt */
+        gfn_t *gfns;
+        unsigned long slot_bitmap; /* One bit set per slot which has memory
+                                    * in this shadow page.
+                                    */
+        int multimapped;         /* More than one parent_pte? */
+        int root_count;          /* Currently serving as active root */
+        union {
+                u64 *parent_pte;               /* !multimapped */
+                struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
+        };
+};
+
+/*
+ * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
+ * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
+ * mode.
+ */
+struct kvm_mmu {
+        void (*new_cr3)(struct kvm_vcpu *vcpu);
+        int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
+        void (*free)(struct kvm_vcpu *vcpu);
+        gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
+        void (*prefetch_page)(struct kvm_vcpu *vcpu,
+                              struct kvm_mmu_page *page);
+        hpa_t root_hpa;
+        int root_level;
+        int shadow_root_level;
+
+        u64 *pae_root;
+};
+
 struct kvm_vcpu_arch {
         u64 host_tsc;
         int interrupt_window_open;
@@ -162,11 +255,6 @@ struct kvm_vcpu_arch {
         struct x86_emulate_ctxt emulate_ctxt;
 };
 
-struct kvm_vcpu {
-        KVM_VCPU_COMM;
-
-        struct kvm_vcpu_arch arch;
-};
 
 struct descriptor_table {
         u16 limit;