KVM: x86/mmu: Avoid an extra memslot lookup in try_async_pf() for L2

Create a new function kvm_is_visible_memslot() and use it from kvm_is_visible_gfn(); use the new function in try_async_pf() too, to avoid an extra memslot lookup. Opportunistically squish a multi-line comment into a single-line comment. Note, the end result, KVM_PFN_NOSLOT, is unchanged.

Paolo Bonzini committed 6 years ago

Commit c36b7151 parent c583eed3 files · +10 −11Browse files

Showing the changes to include/linux (1 of 3 files). Show all

Unified · Split

include/linux/kvm_host.h+6−0

 }
 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
+static inline bool kvm_is_visible_memslot(struct kvm_memory_slot *memslot)
+{
+	return (memslot && memslot->id < KVM_USER_MEM_SLOTS &&
+		!(memslot->flags & KVM_MEMSLOT_INVALID));
+}
 struct kvm_vcpu *kvm_get_running_vcpu(void);
 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void);