diff options
| author | Gleb Natapov <gleb@redhat.com> | 2010-10-18 15:22:23 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:23:08 +0200 |
| commit | 49c7754ce57063b819b01eb8a4290841ad0886c4 (patch) | |
| tree | 67561bbc829d93efa5316c246ec84fe2f2493236 /include | |
| parent | 56028d0861e48f7cc9c573d79f2d8a0a933a2bba (diff) | |
| download | linux-49c7754ce57063b819b01eb8a4290841ad0886c4.tar.bz2 | |
KVM: Add memory slot versioning and use it to provide fast guest write interface
Keep track of memslots changes by keeping generation number in memslots
structure. Provide kvm_write_guest_cached() function that skips
gfn_to_hva() translation if memslots was not changed since previous
invocation.
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 7 | ||||
| -rw-r--r-- | include/linux/kvm_types.h | 7 |
2 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index e56acc7857e2..e6748204cd56 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -199,6 +199,7 @@ struct kvm_irq_routing_table {}; struct kvm_memslots { int nmemslots; + u64 generation; struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS]; }; @@ -352,12 +353,18 @@ int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, int offset, int len); int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, unsigned long len); +int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, + void *data, unsigned long len); +int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, + gpa_t gpa); int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn); void mark_page_dirty(struct kvm *kvm, gfn_t gfn); +void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, + gfn_t gfn); void kvm_vcpu_block(struct kvm_vcpu *vcpu); void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu); diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h index 7ac0d4eee430..fa7cc7244cbd 100644 --- a/include/linux/kvm_types.h +++ b/include/linux/kvm_types.h @@ -67,4 +67,11 @@ struct kvm_lapic_irq { u32 dest_id; }; +struct gfn_to_hva_cache { + u64 generation; + gpa_t gpa; + unsigned long hva; + struct kvm_memory_slot *memslot; +}; + #endif /* __KVM_TYPES_H__ */ |