KVM: Portability: Move kvm_vcpu definition back to kvm.h

[linux-2.6-omap-h63xx.git] / drivers / kvm / x86.h

diff --git a/drivers/kvm/x86.h b/drivers/kvm/x86.h
index 0da4be9b0bad30ccbf11524c5ca3074520d91f5b..a0dd4473b8f8de5a793905bbc2229eb8f90d846a 100644 (file)
--- 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;