Remove affinity pinning for Intel CPUs.

Author: Taogle2018

arch/x86/kvm/vmx.c

@@ -7409,12 +7409,18 @@ static void __declspec(noinline) vmx_vcpu_run(struct kvm_vcpu *vcpu)
 		do_print1 = 0;
 	}
 
+	for (i = 0; i < m->nr; i++)
+		if (m->host[i].index == MSR_GS_BASE)
+			rdmsrl(m->host[i].index, m->host[i].value);
 	for (i = 0; i < m->nr; i++)
 		wrmsrl(m->guest[i].index, m->guest[i].value);
 	kvm_load_guest_fpu(vcpu);
 	/* Calls to low-level assembly functions*/
 	__asm_vmx_vcpu_run(vmx);
 	kvm_save_guest_fpu(vcpu);
+	for (i = 0; i < m->nr; i++)
+		if (m->guest[i].index == MSR_GS_BASE)
+			rdmsrl(m->guest[i].index, m->guest[i].value);
 	for (i = 0; i < m->nr; i++)
 		wrmsrl(m->host[i].index, m->host[i].value);
 

virt/kvm/kvm_main.c

@@ -1762,7 +1762,6 @@ static int kvm_vm_ioctl_create_vcpu(PDEVICE_OBJECT pDevObj, PIRP pIrp, void *arg
 	struct kvm *kvm = devext->PrivData;
 	HANDLE handle;
 	int id = *(int *)arg;
-	KAFFINITY Affinity;
 
 	mutex_lock(&kvm->lock);
 	if (id >= GVM_MAX_VCPU_ID)
@@ -1820,13 +1819,6 @@ static int kvm_vm_ioctl_create_vcpu(PDEVICE_OBJECT pDevObj, PIRP pIrp, void *arg
 	mutex_unlock(&kvm->lock);
 	kvm_arch_vcpu_postcreate(vcpu);
 
-	if (is_Intel()) {
-		Affinity = (KAFFINITY)1 << (
-			cpu_online_count - 1
-			- 2 * vcpu->vcpu_id / cpu_online_count % 2
-			- vcpu->vcpu_id * 2 % cpu_online_count);
-		KeSetSystemAffinityThread(Affinity);
-	}
 	return r;
 
 unlock_vcpu_destroy:
@@ -1865,7 +1857,6 @@ NTSTATUS kvm_vcpu_fast_ioctl_run(PDEVICE_OBJECT pDevObj)
 	struct kvm_vcpu *vcpu = devext->PrivData;
 	LARGE_INTEGER expire;
 	expire.QuadPart = (u64)-10000000;
-	KAFFINITY Affinity;
 	int r = -EINVAL;
 
 	if (vcpu->kvm->process != IoGetCurrentProcess())
@@ -1880,13 +1871,6 @@ NTSTATUS kvm_vcpu_fast_ioctl_run(PDEVICE_OBJECT pDevObj)
 				NULL,
 				KernelMode,
 				NULL);
-		if (is_Intel()) {
-			Affinity = (KAFFINITY)1 << (
-				cpu_online_count - 1
-				- 2 * vcpu->vcpu_id / cpu_online_count % 2
-				- vcpu->vcpu_id * 2 % cpu_online_count);
-			KeSetSystemAffinityThread(Affinity);
-		}
 	}
 	/* vcpu_run has to return to user space periodically otherwise
 	 * vcpu thread could hang when process terminates.