From 7cc8883074b040aa8c1ebd3a17463b0ea3a9ef16 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@qumranet.com>
Date: Tue, 13 May 2008 16:29:20 +0300
Subject: [PATCH] KVM: Remove decache_vcpus_on_cpu() and related callbacks

Obsoleted by the vmx-specific per-cpu list.

Signed-off-by: Avi Kivity <avi@qumranet.com>
---
 arch/ia64/kvm/kvm-ia64.c   | 8 --------
 arch/powerpc/kvm/powerpc.c | 4 ----
 arch/s390/kvm/kvm-s390.c   | 4 ----
 arch/x86/kvm/svm.c         | 5 -----
 arch/x86/kvm/vmx.c         | 6 ------
 arch/x86/kvm/x86.c         | 8 --------
 include/asm-x86/kvm_host.h | 1 -
 include/linux/kvm_host.h   | 3 ---
 virt/kvm/kvm_main.c        | 1 -
 9 files changed, 40 deletions(-)

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 68c978be9a51..7c504be57972 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1035,14 +1035,6 @@ static void kvm_free_vmm_area(void)
 	}
 }
 
-/*
- * Make sure that a cpu that is being hot-unplugged does not have any vcpus
- * cached on it. Leave it as blank for IA64.
- */
-void decache_vcpus_on_cpu(int cpu)
-{
-}
-
 static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 {
 }
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 777e0f34e0ea..0513b359851b 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -240,10 +240,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 {
 }
 
-void decache_vcpus_on_cpu(int cpu)
-{
-}
-
 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
                                     struct kvm_debug_guest *dbg)
 {
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 6558b09ff579..4585c8ac2b0c 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -79,10 +79,6 @@ void kvm_arch_hardware_disable(void *garbage)
 {
 }
 
-void decache_vcpus_on_cpu(int cpu)
-{
-}
-
 int kvm_arch_hardware_setup(void)
 {
 	return 0;
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 9390a31c06f4..238e8f3afaf4 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -709,10 +709,6 @@ static void svm_vcpu_put(struct kvm_vcpu *vcpu)
 	rdtscll(vcpu->arch.host_tsc);
 }
 
-static void svm_vcpu_decache(struct kvm_vcpu *vcpu)
-{
-}
-
 static void svm_cache_regs(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_svm *svm = to_svm(vcpu);
@@ -1933,7 +1929,6 @@ static struct kvm_x86_ops svm_x86_ops = {
 	.prepare_guest_switch = svm_prepare_guest_switch,
 	.vcpu_load = svm_vcpu_load,
 	.vcpu_put = svm_vcpu_put,
-	.vcpu_decache = svm_vcpu_decache,
 
 	.set_guest_debug = svm_guest_debug,
 	.get_msr = svm_get_msr,
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 4d179d106376..b99bb37e5dec 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -692,11 +692,6 @@ static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
 	update_exception_bitmap(vcpu);
 }
 
-static void vmx_vcpu_decache(struct kvm_vcpu *vcpu)
-{
-	vcpu_clear(to_vmx(vcpu));
-}
-
 static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
 {
 	return vmcs_readl(GUEST_RFLAGS);
@@ -3114,7 +3109,6 @@ static struct kvm_x86_ops vmx_x86_ops = {
 	.prepare_guest_switch = vmx_save_host_state,
 	.vcpu_load = vmx_vcpu_load,
 	.vcpu_put = vmx_vcpu_put,
-	.vcpu_decache = vmx_vcpu_decache,
 
 	.set_guest_debug = set_guest_debug,
 	.guest_debug_pre = kvm_guest_debug_pre,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8c14ddcaba70..fd03b4465bcc 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -817,14 +817,6 @@ out:
 	return r;
 }
 
-/*
- * Make sure that a cpu that is being hot-unplugged does not have any vcpus
- * cached on it.
- */
-void decache_vcpus_on_cpu(int cpu)
-{
-}
-
 int kvm_dev_ioctl_check_extension(long ext)
 {
 	int r;
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 0df9d5fa281a..4bcdc7de07b5 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -380,7 +380,6 @@ struct kvm_x86_ops {
 	void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
 	void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 	void (*vcpu_put)(struct kvm_vcpu *vcpu);
-	void (*vcpu_decache)(struct kvm_vcpu *vcpu);
 
 	int (*set_guest_debug)(struct kvm_vcpu *vcpu,
 			       struct kvm_debug_guest *dbg);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index de9d1df4bba2..865dcbcb891f 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -135,9 +135,6 @@ void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 void vcpu_load(struct kvm_vcpu *vcpu);
 void vcpu_put(struct kvm_vcpu *vcpu);
 
-void decache_vcpus_on_cpu(int cpu);
-
-
 int kvm_init(void *opaque, unsigned int vcpu_size,
 		  struct module *module);
 void kvm_exit(void);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index e4bf88a9ee4e..83a0e5ce6037 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1273,7 +1273,6 @@ static void hardware_disable(void *junk)
 	if (!cpu_isset(cpu, cpus_hardware_enabled))
 		return;
 	cpu_clear(cpu, cpus_hardware_enabled);
-	decache_vcpus_on_cpu(cpu);
 	kvm_arch_hardware_disable(NULL);
 }