[PATCH] KVM: MMU: Replace atomic allocations by preallocated objects

[powerpc.git] / drivers / kvm / kvm.h

diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index b24a86e..91e0c75 100644 (file)
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -168,6 +168,17 @@ struct kvm_mmu {
        u64 *pae_root;
 };
 
+#define KVM_NR_MEM_OBJS 20
+
+struct kvm_mmu_memory_cache {
+       int nobjs;
+       void *objects[KVM_NR_MEM_OBJS];
+};
+
+/*
+ * 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_guest_debug {
        int enabled;
        unsigned long bp[4];
@@ -239,6 +250,9 @@ struct kvm_vcpu {
        struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];
        struct kvm_mmu mmu;
 
+       struct kvm_mmu_memory_cache mmu_pte_chain_cache;
+       struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
+
        gfn_t last_pt_write_gfn;
        int   last_pt_write_count;
 
@@ -381,7 +395,7 @@ 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 *kvm, int slot);
+void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);
 
 hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
 #define HPA_MSB ((sizeof(hpa_t) * 8) - 1)