KVM: make processes waiting on vcpu mutex killable

[~andy/linux] / include / linux / kvm_host.h

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index b9bba60c298b1944558268f0ff375f79b8b26ca3..80bfc880921ea1fd2fe183e9aeb21ea1e4afca09 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -82,11 +82,12 @@ static inline bool is_invalid_pfn(pfn_t pfn)
        return !is_noslot_pfn(pfn) && is_error_pfn(pfn);
 }
 
-#define KVM_HVA_ERR_BAD        (PAGE_OFFSET)
+#define KVM_HVA_ERR_BAD                (PAGE_OFFSET)
+#define KVM_HVA_ERR_RO_BAD     (PAGE_OFFSET + PAGE_SIZE)
 
 static inline bool kvm_is_error_hva(unsigned long addr)
 {
-       return addr == PAGE_OFFSET;
+       return addr >= PAGE_OFFSET;
 }
 
 #define KVM_ERR_PTR_BAD_PAGE   (ERR_PTR(-ENOENT))
@@ -407,7 +408,7 @@ static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 
-void vcpu_load(struct kvm_vcpu *vcpu);
+int __must_check vcpu_load(struct kvm_vcpu *vcpu);
 void vcpu_put(struct kvm_vcpu *vcpu);
 
 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
@@ -457,13 +458,18 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
                                int user_alloc);
 bool kvm_largepages_enabled(void);
 void kvm_disable_largepages(void);
-void kvm_arch_flush_shadow(struct kvm *kvm);
+/* flush all memory translations */
+void kvm_arch_flush_shadow_all(struct kvm *kvm);
+/* flush memory translations pointing to 'slot' */
+void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
+                                  struct kvm_memory_slot *slot);
 
 int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
                            int nr_pages);
 
 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
 unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
+unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
 void kvm_release_page_clean(struct page *page);
 void kvm_release_page_dirty(struct page *page);
 void kvm_set_page_dirty(struct page *page);
@@ -771,6 +777,12 @@ __gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
        return search_memslots(slots, gfn);
 }
 
+static inline unsigned long
+__gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
+{
+       return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
+}
+
 static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
 {
        return gfn_to_memslot(kvm, gfn)->id;
@@ -791,12 +803,6 @@ hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
        return slot->base_gfn + gfn_offset;
 }
 
-static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
-                                              gfn_t gfn)
-{
-       return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
-}
-
 static inline gpa_t gfn_to_gpa(gfn_t gfn)
 {
        return (gpa_t)gfn << PAGE_SHIFT;