KVM: Add architecture-defined TLB flush support

Allow architectures to override the generic kvm_flush_remote_tlbs() function via HAVE_KVM_ARCH_TLB_FLUSH_ALL. ARMv7 will need this to provide its own TLB flush interface. Reviewed-by: Christoffer Dall <[email protected]> Reviewed-by: Marc Zyngier <[email protected]> Reviewed-by: Paolo Bonzini <[email protected]> Signed-off-by: Mario Smarduch <[email protected]>
littlestarling · Jan 16, 2015 · a6d5101 · a6d5101
1 parent 924de80
commit a6d5101
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diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
@@ -37,3 +37,6 @@ config HAVE_KVM_CPU_RELAX_INTERCEPT
 
 config KVM_VFIO
        bool
+
+config HAVE_KVM_ARCH_TLB_FLUSH_ALL
+       bool
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
@@ -176,6 +176,7 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req)
 	return called;
 }
 
+#ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL
 void kvm_flush_remote_tlbs(struct kvm *kvm)
 {
 	long dirty_count = kvm->tlbs_dirty;
@@ -186,6 +187,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
 	cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
 }
 EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
+#endif
 
 void kvm_reload_remote_mmus(struct kvm *kvm)
 {
-Original file line number
+Diff line change
@@ Expand Up / @@ -37,3 +37,6 @@ config HAVE_KVM_CPU_RELAX_INTERCEPT @@
     config KVM_VFIO
            bool
+    config HAVE_KVM_ARCH_TLB_FLUSH_ALL
+           bool