kvm: x86: vmx: move some vmx setting from vmx_init() to hardware_setup()

Instead of vmx_init(), actually it would make reasonable sense to do
anything specific to vmx hardware setting in vmx_x86_ops->hardware_setup().
Signed-off-by: NTiejun Chen <tiejun.chen@intel.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx.c

@@ -5720,8 +5720,108 @@ static void update_ple_window_actual_max(void)
 
 static __init int hardware_setup(void)
 {
-	if (setup_vmcs_config(&vmcs_config) < 0)
-		return -EIO;
+	int r = -ENOMEM, i, msr;
+
+	rdmsrl_safe(MSR_EFER, &host_efer);
+
+	for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i)
+		kvm_define_shared_msr(i, vmx_msr_index[i]);
+
+	vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL);
+	if (!vmx_io_bitmap_a)
+		return r;
+
+	vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
+	if (!vmx_io_bitmap_b)
+		goto out;
+
+	vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL);
+	if (!vmx_msr_bitmap_legacy)
+		goto out1;
+
+	vmx_msr_bitmap_legacy_x2apic =
+				(unsigned long *)__get_free_page(GFP_KERNEL);
+	if (!vmx_msr_bitmap_legacy_x2apic)
+		goto out2;
+
+	vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL);
+	if (!vmx_msr_bitmap_longmode)
+		goto out3;
+
+	vmx_msr_bitmap_longmode_x2apic =
+				(unsigned long *)__get_free_page(GFP_KERNEL);
+	if (!vmx_msr_bitmap_longmode_x2apic)
+		goto out4;
+	vmx_vmread_bitmap = (unsigned long *)__get_free_page(GFP_KERNEL);
+	if (!vmx_vmread_bitmap)
+		goto out5;
+
+	vmx_vmwrite_bitmap = (unsigned long *)__get_free_page(GFP_KERNEL);
+	if (!vmx_vmwrite_bitmap)
+		goto out6;
+
+	memset(vmx_vmread_bitmap, 0xff, PAGE_SIZE);
+	memset(vmx_vmwrite_bitmap, 0xff, PAGE_SIZE);
+
+	/*
+	 * Allow direct access to the PC debug port (it is often used for I/O
+	 * delays, but the vmexits simply slow things down).
+	 */
+	memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE);
+	clear_bit(0x80, vmx_io_bitmap_a);
+
+	memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE);
+
+	memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE);
+	memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE);
+
+	vmx_disable_intercept_for_msr(MSR_FS_BASE, false);
+	vmx_disable_intercept_for_msr(MSR_GS_BASE, false);
+	vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true);
+	vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false);
+	vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false);
+	vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
+	vmx_disable_intercept_for_msr(MSR_IA32_BNDCFGS, true);
+
+	memcpy(vmx_msr_bitmap_legacy_x2apic,
+			vmx_msr_bitmap_legacy, PAGE_SIZE);
+	memcpy(vmx_msr_bitmap_longmode_x2apic,
+			vmx_msr_bitmap_longmode, PAGE_SIZE);
+
+	if (enable_apicv) {
+		for (msr = 0x800; msr <= 0x8ff; msr++)
+			vmx_disable_intercept_msr_read_x2apic(msr);
+
+		/* According SDM, in x2apic mode, the whole id reg is used.
+		 * But in KVM, it only use the highest eight bits. Need to
+		 * intercept it */
+		vmx_enable_intercept_msr_read_x2apic(0x802);
+		/* TMCCT */
+		vmx_enable_intercept_msr_read_x2apic(0x839);
+		/* TPR */
+		vmx_disable_intercept_msr_write_x2apic(0x808);
+		/* EOI */
+		vmx_disable_intercept_msr_write_x2apic(0x80b);
+		/* SELF-IPI */
+		vmx_disable_intercept_msr_write_x2apic(0x83f);
+	}
+
+	if (enable_ept) {
+		kvm_mmu_set_mask_ptes(0ull,
+			(enable_ept_ad_bits) ? VMX_EPT_ACCESS_BIT : 0ull,
+			(enable_ept_ad_bits) ? VMX_EPT_DIRTY_BIT : 0ull,
+			0ull, VMX_EPT_EXECUTABLE_MASK);
+		ept_set_mmio_spte_mask();
+		kvm_enable_tdp();
+	} else
+		kvm_disable_tdp();
+
+	update_ple_window_actual_max();
+
+	if (setup_vmcs_config(&vmcs_config) < 0) {
+		r = -EIO;
+		goto out7;
+    }
 
 	if (boot_cpu_has(X86_FEATURE_NX))
 		kvm_enable_efer_bits(EFER_NX);
@@ -5781,10 +5881,38 @@ static __init int hardware_setup(void)
 		nested_vmx_setup_ctls_msrs();
 
 	return alloc_kvm_area();
+
+out7:
+	free_page((unsigned long)vmx_vmwrite_bitmap);
+out6:
+	free_page((unsigned long)vmx_vmread_bitmap);
+out5:
+	free_page((unsigned long)vmx_msr_bitmap_longmode_x2apic);
+out4:
+	free_page((unsigned long)vmx_msr_bitmap_longmode);
+out3:
+	free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic);
+out2:
+	free_page((unsigned long)vmx_msr_bitmap_legacy);
+out1:
+	free_page((unsigned long)vmx_io_bitmap_b);
+out:
+	free_page((unsigned long)vmx_io_bitmap_a);
+
+    return r;
 }
 
 static __exit void hardware_unsetup(void)
 {
+	free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic);
+	free_page((unsigned long)vmx_msr_bitmap_longmode_x2apic);
+	free_page((unsigned long)vmx_msr_bitmap_legacy);
+	free_page((unsigned long)vmx_msr_bitmap_longmode);
+	free_page((unsigned long)vmx_io_bitmap_b);
+	free_page((unsigned long)vmx_io_bitmap_a);
+	free_page((unsigned long)vmx_vmwrite_bitmap);
+	free_page((unsigned long)vmx_vmread_bitmap);
+
 	free_kvm_area();
 }
 
@@ -9187,150 +9315,21 @@ static struct kvm_x86_ops vmx_x86_ops = {
 
 static int __init vmx_init(void)
 {
-	int r, i, msr;
-
-	rdmsrl_safe(MSR_EFER, &host_efer);
-
-	for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i)
-		kvm_define_shared_msr(i, vmx_msr_index[i]);
-
-	vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL);
-	if (!vmx_io_bitmap_a)
-		return -ENOMEM;
-
-	r = -ENOMEM;
-
-	vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
-	if (!vmx_io_bitmap_b)
-		goto out;
-
-	vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL);
-	if (!vmx_msr_bitmap_legacy)
-		goto out1;
-
-	vmx_msr_bitmap_legacy_x2apic =
-				(unsigned long *)__get_free_page(GFP_KERNEL);
-	if (!vmx_msr_bitmap_legacy_x2apic)
-		goto out2;
-
-	vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL);
-	if (!vmx_msr_bitmap_longmode)
-		goto out3;
-
-	vmx_msr_bitmap_longmode_x2apic =
-				(unsigned long *)__get_free_page(GFP_KERNEL);
-	if (!vmx_msr_bitmap_longmode_x2apic)
-		goto out4;
-	vmx_vmread_bitmap = (unsigned long *)__get_free_page(GFP_KERNEL);
-	if (!vmx_vmread_bitmap)
-		goto out5;
-
-	vmx_vmwrite_bitmap = (unsigned long *)__get_free_page(GFP_KERNEL);
-	if (!vmx_vmwrite_bitmap)
-		goto out6;
-
-	memset(vmx_vmread_bitmap, 0xff, PAGE_SIZE);
-	memset(vmx_vmwrite_bitmap, 0xff, PAGE_SIZE);
-
-	/*
-	 * Allow direct access to the PC debug port (it is often used for I/O
-	 * delays, but the vmexits simply slow things down).
-	 */
-	memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE);
-	clear_bit(0x80, vmx_io_bitmap_a);
-
-	memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE);
-
-	memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE);
-	memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE);
-
-	set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
-
-	r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
-		     __alignof__(struct vcpu_vmx), THIS_MODULE);
+	int r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
+                     __alignof__(struct vcpu_vmx), THIS_MODULE);
 	if (r)
-		goto out7;
+		return r;
 
 #ifdef CONFIG_KEXEC
 	rcu_assign_pointer(crash_vmclear_loaded_vmcss,
 			   crash_vmclear_local_loaded_vmcss);
 #endif
 
-	vmx_disable_intercept_for_msr(MSR_FS_BASE, false);
-	vmx_disable_intercept_for_msr(MSR_GS_BASE, false);
-	vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true);
-	vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false);
-	vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false);
-	vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
-	vmx_disable_intercept_for_msr(MSR_IA32_BNDCFGS, true);
-
-	memcpy(vmx_msr_bitmap_legacy_x2apic,
-			vmx_msr_bitmap_legacy, PAGE_SIZE);
-	memcpy(vmx_msr_bitmap_longmode_x2apic,
-			vmx_msr_bitmap_longmode, PAGE_SIZE);
-
-	if (enable_apicv) {
-		for (msr = 0x800; msr <= 0x8ff; msr++)
-			vmx_disable_intercept_msr_read_x2apic(msr);
-
-		/* According SDM, in x2apic mode, the whole id reg is used.
-		 * But in KVM, it only use the highest eight bits. Need to
-		 * intercept it */
-		vmx_enable_intercept_msr_read_x2apic(0x802);
-		/* TMCCT */
-		vmx_enable_intercept_msr_read_x2apic(0x839);
-		/* TPR */
-		vmx_disable_intercept_msr_write_x2apic(0x808);
-		/* EOI */
-		vmx_disable_intercept_msr_write_x2apic(0x80b);
-		/* SELF-IPI */
-		vmx_disable_intercept_msr_write_x2apic(0x83f);
-	}
-
-	if (enable_ept) {
-		kvm_mmu_set_mask_ptes(0ull,
-			(enable_ept_ad_bits) ? VMX_EPT_ACCESS_BIT : 0ull,
-			(enable_ept_ad_bits) ? VMX_EPT_DIRTY_BIT : 0ull,
-			0ull, VMX_EPT_EXECUTABLE_MASK);
-		ept_set_mmio_spte_mask();
-		kvm_enable_tdp();
-	} else
-		kvm_disable_tdp();
-
-	update_ple_window_actual_max();
-
 	return 0;
-
-out7:
-	free_page((unsigned long)vmx_vmwrite_bitmap);
-out6:
-	free_page((unsigned long)vmx_vmread_bitmap);
-out5:
-	free_page((unsigned long)vmx_msr_bitmap_longmode_x2apic);
-out4:
-	free_page((unsigned long)vmx_msr_bitmap_longmode);
-out3:
-	free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic);
-out2:
-	free_page((unsigned long)vmx_msr_bitmap_legacy);
-out1:
-	free_page((unsigned long)vmx_io_bitmap_b);
-out:
-	free_page((unsigned long)vmx_io_bitmap_a);
-	return r;
 }
 
 static void __exit vmx_exit(void)
 {
-	free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic);
-	free_page((unsigned long)vmx_msr_bitmap_longmode_x2apic);
-	free_page((unsigned long)vmx_msr_bitmap_legacy);
-	free_page((unsigned long)vmx_msr_bitmap_longmode);
-	free_page((unsigned long)vmx_io_bitmap_b);
-	free_page((unsigned long)vmx_io_bitmap_a);
-	free_page((unsigned long)vmx_vmwrite_bitmap);
-	free_page((unsigned long)vmx_vmread_bitmap);
-
 #ifdef CONFIG_KEXEC
 	RCU_INIT_POINTER(crash_vmclear_loaded_vmcss, NULL);
 	synchronize_rcu();