[PATCH 4/4] Modify KVM to update guest time accounting.

[Laurent Vivier]

[PATCH 4/4] Modify KVM to update guest time accounting.

Signed-off-by: Laurent Vivier <Laurent.Vivier@xxxxxxxx>
-- 
------------- Laurent.Vivier@xxxxxxxx  --------------
          "Software is hard" - Donald Knuth
Index: kvm/drivers/kvm/kvm.h
===================================================================
--- kvm.orig/drivers/kvm/kvm.h	2007-08-20 13:23:53.000000000 +0200
+++ kvm/drivers/kvm/kvm.h	2007-08-20 13:23:58.000000000 +0200
@@ -589,6 +589,17 @@ void kvm_mmu_unload(struct kvm_vcpu *vcp
 
 int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
 
+static inline void kvm_guest_enter(void)
+{
+#ifdef CONFIG_GUEST_ACCOUNTING
+	current->flags |= PF_VCPU;
+#endif
+}
+
+static inline void kvm_guest_exit(void)
+{
+}
+
 static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
 				     u32 error_code)
 {
Index: kvm/drivers/kvm/svm.c
===================================================================
--- kvm.orig/drivers/kvm/svm.c	2007-08-20 13:23:53.000000000 +0200
+++ kvm/drivers/kvm/svm.c	2007-08-20 13:23:58.000000000 +0200
@@ -1404,6 +1404,7 @@ again:
 	clgi();
 
 	vcpu->guest_mode = 1;
+	kvm_guest_enter();
 	if (vcpu->requests)
 		if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
 		    svm_flush_tlb(vcpu);
@@ -1536,6 +1537,7 @@ again:
 #endif
 		: "cc", "memory" );
 
+	kvm_guest_exit();
 	vcpu->guest_mode = 0;
 
 	if (vcpu->fpu_active) {
Index: kvm/drivers/kvm/vmx.c
===================================================================
--- kvm.orig/drivers/kvm/vmx.c	2007-08-20 13:23:53.000000000 +0200
+++ kvm/drivers/kvm/vmx.c	2007-08-20 13:23:58.000000000 +0200
@@ -2078,6 +2078,7 @@ again:
 	local_irq_disable();
 
 	vcpu->guest_mode = 1;
+	kvm_guest_enter();
 	if (vcpu->requests)
 		if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
 		    vmx_flush_tlb(vcpu);
@@ -2198,6 +2199,7 @@ again:
 		[cr2]"i"(offsetof(struct kvm_vcpu, cr2))
 	      : "cc", "memory" );
 
+	kvm_guest_exit();
 	vcpu->guest_mode = 0;
 	local_irq_enable();
 
Index: kvm/drivers/kvm/Kconfig
===================================================================
--- kvm.orig/drivers/kvm/Kconfig	2007-08-20 13:36:58.000000000 +0200
+++ kvm/drivers/kvm/Kconfig	2007-08-20 13:37:36.000000000 +0200
@@ -13,6 +13,7 @@ config KVM
 	depends on X86 && EXPERIMENTAL
 	select PREEMPT_NOTIFIERS
 	select ANON_INODES
+	select GUEST_ACCOUNTING
 	---help---
 	  Support hosting fully virtualized guest machines using hardware
 	  virtualization extensions.  You will need a fairly recent