!739 Fix kvm-unit-tests vmx_cr4_osxsave_test case failed

Merge Pull Request from: @remimin 
 
https://gitee.com/openeuler/kernel/issues/I72190 
 
Link:https://gitee.com/openeuler/kernel/pulls/739 

Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com> 
Reviewed-by: Kevin Zhu <zhukeqian1@huawei.com> 
Reviewed-by: sanglipeng <sanglipeng1@jd.com> 
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com> 

arch/x86/kvm/cpuid.c

@@ -168,6 +168,7 @@ void kvm_update_cpuid_runtime(struct kvm_vcpu *vcpu)
 					   MSR_IA32_MISC_ENABLE_MWAIT);
 	}
 }
+EXPORT_SYMBOL_GPL(kvm_update_cpuid_runtime);
 
 static void kvm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
 {

arch/x86/kvm/svm/svm.c

@@ -1713,6 +1713,9 @@ void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 	cr4 |= host_cr4_mce;
 	to_svm(vcpu)->vmcb->save.cr4 = cr4;
 	vmcb_mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
+
+	if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE))
+		kvm_update_cpuid_runtime(vcpu);
 }
 
 static void svm_set_segment(struct kvm_vcpu *vcpu,

arch/x86/kvm/vmx/vmx.c

@@ -3386,6 +3386,7 @@ static bool vmx_is_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 
 void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 {
+	unsigned long old_cr4 = vcpu->arch.cr4;
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
 	/*
 	 * Pass through host's Machine Check Enable value to hw_cr4, which
@@ -3442,6 +3443,9 @@ void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 
 	vmcs_writel(CR4_READ_SHADOW, cr4);
 	vmcs_writel(GUEST_CR4, hw_cr4);
+
+	if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE))
+		kvm_update_cpuid_runtime(vcpu);
 }
 
 void vmx_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg)

arch/x86/kvm/x86.c

@@ -1100,9 +1100,6 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 	    (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE)))
 		kvm_mmu_reset_context(vcpu);
 
-	if ((cr4 ^ old_cr4) & (X86_CR4_OSXSAVE | X86_CR4_PKE))
-		kvm_update_cpuid_runtime(vcpu);
-
 	return 0;
 }
 EXPORT_SYMBOL_GPL(kvm_set_cr4);
@@ -9983,7 +9980,6 @@ static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 {
 	struct msr_data apic_base_msr;
 	int mmu_reset_needed = 0;
-	int cpuid_update_needed = 0;
 	int pending_vec, max_bits, idx;
 	struct desc_ptr dt;
 	int ret = -EINVAL;
@@ -10018,11 +10014,7 @@ static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 	vcpu->arch.cr0 = sregs->cr0;
 
 	mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
-	cpuid_update_needed |= ((kvm_read_cr4(vcpu) ^ sregs->cr4) &
-				(X86_CR4_OSXSAVE | X86_CR4_PKE));
 	kvm_x86_ops.set_cr4(vcpu, sregs->cr4);
-	if (cpuid_update_needed)
-		kvm_update_cpuid_runtime(vcpu);
 
 	idx = srcu_read_lock(&vcpu->kvm->srcu);
 	if (is_pae_paging(vcpu)) {