[mirror_ubuntu-artful-kernel.git] / virt / kvm / iommu.c

/*
 * Copyright (c) 2006, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 *
 * Copyright (C) 2006-2008 Intel Corporation
 * Copyright IBM Corporation, 2008
 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
 *
 * Author: Allen M. Kay <allen.m.kay@intel.com>
 * Author: Weidong Han <weidong.han@intel.com>
 * Author: Ben-Ami Yassour <benami@il.ibm.com>
 */

#include <linux/list.h>
#include <linux/kvm_host.h>
#include <linux/pci.h>
#include <linux/dmar.h>
#include <linux/iommu.h>
#include <linux/intel-iommu.h>

static int allow_unsafe_assigned_interrupts;
module_param_named(allow_unsafe_assigned_interrupts,
		   allow_unsafe_assigned_interrupts, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(allow_unsafe_assigned_interrupts,
 "Enable device assignment on platforms without interrupt remapping support.");

static int kvm_iommu_unmap_memslots(struct kvm *kvm);
static void kvm_iommu_put_pages(struct kvm *kvm,
				gfn_t base_gfn, unsigned long npages);

static pfn_t kvm_pin_pages(struct kvm *kvm, struct kvm_memory_slot *slot,
			   gfn_t gfn, unsigned long size)
{
	gfn_t end_gfn;
	pfn_t pfn;

	pfn     = gfn_to_pfn_memslot(kvm, slot, gfn);
	end_gfn = gfn + (size >> PAGE_SHIFT);
	gfn    += 1;

	if (is_error_pfn(pfn))
		return pfn;

	while (gfn < end_gfn)
		gfn_to_pfn_memslot(kvm, slot, gfn++);

	return pfn;
}

int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
{
	gfn_t gfn, end_gfn;
	pfn_t pfn;
	int r = 0;
	struct iommu_domain *domain = kvm->arch.iommu_domain;
	int flags;

	/* check if iommu exists and in use */
	if (!domain)
		return 0;

	gfn     = slot->base_gfn;
	end_gfn = gfn + slot->npages;

	flags = IOMMU_READ | IOMMU_WRITE;
	if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)
		flags |= IOMMU_CACHE;


	while (gfn < end_gfn) {
		unsigned long page_size;

		/* Check if already mapped */
		if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn))) {
			gfn += 1;
			continue;
		}

		/* Get the page size we could use to map */
		page_size = kvm_host_page_size(kvm, gfn);

		/* Make sure the page_size does not exceed the memslot */
		while ((gfn + (page_size >> PAGE_SHIFT)) > end_gfn)
			page_size >>= 1;

		/* Make sure gfn is aligned to the page size we want to map */
		while ((gfn << PAGE_SHIFT) & (page_size - 1))
			page_size >>= 1;

		/*
		 * Pin all pages we are about to map in memory. This is
		 * important because we unmap and unpin in 4kb steps later.
		 */
		pfn = kvm_pin_pages(kvm, slot, gfn, page_size);
		if (is_error_pfn(pfn)) {
			gfn += 1;
			continue;
		}

		/* Map into IO address space */
		r = iommu_map(domain, gfn_to_gpa(gfn), pfn_to_hpa(pfn),
			      get_order(page_size), flags);
		if (r) {
			printk(KERN_ERR "kvm_iommu_map_address:"
			       "iommu failed to map pfn=%llx\n", pfn);
			goto unmap_pages;
		}

		gfn += page_size >> PAGE_SHIFT;


	}

	return 0;

unmap_pages:
	kvm_iommu_put_pages(kvm, slot->base_gfn, gfn);
	return r;
}

static int kvm_iommu_map_memslots(struct kvm *kvm)
{
	int i, idx, r = 0;
	struct kvm_memslots *slots;

	idx = srcu_read_lock(&kvm->srcu);
	slots = kvm_memslots(kvm);

	for (i = 0; i < slots->nmemslots; i++) {
		r = kvm_iommu_map_pages(kvm, &slots->memslots[i]);
		if (r)
			break;
	}
	srcu_read_unlock(&kvm->srcu, idx);

	return r;
}

int kvm_assign_device(struct kvm *kvm,
		      struct kvm_assigned_dev_kernel *assigned_dev)
{
	struct pci_dev *pdev = NULL;
	struct iommu_domain *domain = kvm->arch.iommu_domain;
	int r, last_flags;

	/* check if iommu exists and in use */
	if (!domain)
		return 0;

	pdev = assigned_dev->dev;
	if (pdev == NULL)
		return -ENODEV;

	r = iommu_attach_device(domain, &pdev->dev);
	if (r) {
		printk(KERN_ERR "assign device %x:%x:%x.%x failed",
			pci_domain_nr(pdev->bus),
			pdev->bus->number,
			PCI_SLOT(pdev->devfn),
			PCI_FUNC(pdev->devfn));
		return r;
	}

	last_flags = kvm->arch.iommu_flags;
	if (iommu_domain_has_cap(kvm->arch.iommu_domain,
				 IOMMU_CAP_CACHE_COHERENCY))
		kvm->arch.iommu_flags |= KVM_IOMMU_CACHE_COHERENCY;

	/* Check if need to update IOMMU page table for guest memory */
	if ((last_flags ^ kvm->arch.iommu_flags) ==
			KVM_IOMMU_CACHE_COHERENCY) {
		kvm_iommu_unmap_memslots(kvm);
		r = kvm_iommu_map_memslots(kvm);
		if (r)
			goto out_unmap;
	}

	printk(KERN_DEBUG "assign device %x:%x:%x.%x\n",
		assigned_dev->host_segnr,
		assigned_dev->host_busnr,
		PCI_SLOT(assigned_dev->host_devfn),
		PCI_FUNC(assigned_dev->host_devfn));

	return 0;
out_unmap:
	kvm_iommu_unmap_memslots(kvm);
	return r;
}

int kvm_deassign_device(struct kvm *kvm,
			struct kvm_assigned_dev_kernel *assigned_dev)
{
	struct iommu_domain *domain = kvm->arch.iommu_domain;
	struct pci_dev *pdev = NULL;

	/* check if iommu exists and in use */
	if (!domain)
		return 0;

	pdev = assigned_dev->dev;
	if (pdev == NULL)
		return -ENODEV;

	iommu_detach_device(domain, &pdev->dev);

	printk(KERN_DEBUG "deassign device %x:%x:%x.%x\n",
		assigned_dev->host_segnr,
		assigned_dev->host_busnr,
		PCI_SLOT(assigned_dev->host_devfn),
		PCI_FUNC(assigned_dev->host_devfn));

	return 0;
}

int kvm_iommu_map_guest(struct kvm *kvm)
{
	int r;

	if (!iommu_found()) {
		printk(KERN_ERR "%s: iommu not found\n", __func__);
		return -ENODEV;
	}

	kvm->arch.iommu_domain = iommu_domain_alloc();
	if (!kvm->arch.iommu_domain)
		return -ENOMEM;

	if (!allow_unsafe_assigned_interrupts &&
	    !iommu_domain_has_cap(kvm->arch.iommu_domain,
				  IOMMU_CAP_INTR_REMAP)) {
		printk(KERN_WARNING "%s: No interrupt remapping support,"
		       " disallowing device assignment."
		       " Re-enble with \"allow_unsafe_assigned_interrupts=1\""
		       " module option.\n", __func__);
		iommu_domain_free(kvm->arch.iommu_domain);
		kvm->arch.iommu_domain = NULL;
		return -EPERM;
	}

	r = kvm_iommu_map_memslots(kvm);
	if (r)
		goto out_unmap;

	return 0;

out_unmap:
	kvm_iommu_unmap_memslots(kvm);
	return r;
}

static void kvm_unpin_pages(struct kvm *kvm, pfn_t pfn, unsigned long npages)
{
	unsigned long i;

	for (i = 0; i < npages; ++i)
		kvm_release_pfn_clean(pfn + i);
}

static void kvm_iommu_put_pages(struct kvm *kvm,
				gfn_t base_gfn, unsigned long npages)
{
	struct iommu_domain *domain;
	gfn_t end_gfn, gfn;
	pfn_t pfn;
	u64 phys;

	domain  = kvm->arch.iommu_domain;
	end_gfn = base_gfn + npages;
	gfn     = base_gfn;

	/* check if iommu exists and in use */
	if (!domain)
		return;

	while (gfn < end_gfn) {
		unsigned long unmap_pages;
		int order;

		/* Get physical address */
		phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
		pfn  = phys >> PAGE_SHIFT;

		/* Unmap address from IO address space */
		order       = iommu_unmap(domain, gfn_to_gpa(gfn), 0);
		unmap_pages = 1ULL << order;

		/* Unpin all pages we just unmapped to not leak any memory */
		kvm_unpin_pages(kvm, pfn, unmap_pages);

		gfn += unmap_pages;
	}
}

static int kvm_iommu_unmap_memslots(struct kvm *kvm)
{
	int i, idx;
	struct kvm_memslots *slots;

	idx = srcu_read_lock(&kvm->srcu);
	slots = kvm_memslots(kvm);

	for (i = 0; i < slots->nmemslots; i++) {
		kvm_iommu_put_pages(kvm, slots->memslots[i].base_gfn,
				    slots->memslots[i].npages);
	}
	srcu_read_unlock(&kvm->srcu, idx);

	return 0;
}

int kvm_iommu_unmap_guest(struct kvm *kvm)
{
	struct iommu_domain *domain = kvm->arch.iommu_domain;

	/* check if iommu exists and in use */
	if (!domain)
		return 0;

	kvm_iommu_unmap_memslots(kvm);
	iommu_domain_free(domain);
	return 0;
}
Commit	Line	Data
62c476c7 BAY	1	/*
	2	* Copyright (c) 2006, Intel Corporation.
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms and conditions of the GNU General Public License,
	6	* version 2, as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
	15	* Place - Suite 330, Boston, MA 02111-1307 USA.
	16	*
	17	* Copyright (C) 2006-2008 Intel Corporation
	18	* Copyright IBM Corporation, 2008
221d059d AK	19	* Copyright 2010 Red Hat, Inc. and/or its affiliates.
221d059d AK	20	*
62c476c7 BAY	21	* Author: Allen M. Kay <allen.m.kay@intel.com>
	22	* Author: Weidong Han <weidong.han@intel.com>
	23	* Author: Ben-Ami Yassour <benami@il.ibm.com>
	24	*/
	25
	26	#include <linux/list.h>
	27	#include <linux/kvm_host.h>
	28	#include <linux/pci.h>
	29	#include <linux/dmar.h>
19de40a8	30	#include <linux/iommu.h>
62c476c7 BAY	31	#include <linux/intel-iommu.h>
62c476c7 BAY	32
3f68b031 AW	33	static int allow_unsafe_assigned_interrupts;
	34	module_param_named(allow_unsafe_assigned_interrupts,
	35	allow_unsafe_assigned_interrupts, bool, S_IRUGO \| S_IWUSR);
	36	MODULE_PARM_DESC(allow_unsafe_assigned_interrupts,
	37	"Enable device assignment on platforms without interrupt remapping support.");
	38
62c476c7 BAY	39	static int kvm_iommu_unmap_memslots(struct kvm *kvm);
	40	static void kvm_iommu_put_pages(struct kvm *kvm,
	41	gfn_t base_gfn, unsigned long npages);
	42
fcd95807 JR	43	static pfn_t kvm_pin_pages(struct kvm kvm, struct kvm_memory_slot slot,
	44	gfn_t gfn, unsigned long size)
	45	{
	46	gfn_t end_gfn;
	47	pfn_t pfn;
	48
	49	pfn = gfn_to_pfn_memslot(kvm, slot, gfn);
	50	end_gfn = gfn + (size >> PAGE_SHIFT);
	51	gfn += 1;
	52
	53	if (is_error_pfn(pfn))
	54	return pfn;
	55
	56	while (gfn < end_gfn)
	57	gfn_to_pfn_memslot(kvm, slot, gfn++);
	58
	59	return pfn;
	60	}
	61
3ad26d81	62	int kvm_iommu_map_pages(struct kvm kvm, struct kvm_memory_slot slot)
62c476c7	63	{
fcd95807	64	gfn_t gfn, end_gfn;
62c476c7	65	pfn_t pfn;
fcd95807	66	int r = 0;
19de40a8	67	struct iommu_domain *domain = kvm->arch.iommu_domain;
522c68c4	68	int flags;
62c476c7 BAY	69
	70	/* check if iommu exists and in use */
	71	if (!domain)
	72	return 0;
	73
fcd95807 JR	74	gfn = slot->base_gfn;
	75	end_gfn = gfn + slot->npages;
	76
522c68c4 SY	77	flags = IOMMU_READ \| IOMMU_WRITE;
	78	if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)
	79	flags \|= IOMMU_CACHE;
	80
fcd95807 JR	81
	82	while (gfn < end_gfn) {
	83	unsigned long page_size;
	84
	85	/* Check if already mapped */
	86	if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn))) {
	87	gfn += 1;
	88	continue;
	89	}
	90
	91	/* Get the page size we could use to map */
	92	page_size = kvm_host_page_size(kvm, gfn);
	93
	94	/* Make sure the page_size does not exceed the memslot */
	95	while ((gfn + (page_size >> PAGE_SHIFT)) > end_gfn)
	96	page_size >>= 1;
	97
	98	/* Make sure gfn is aligned to the page size we want to map */
	99	while ((gfn << PAGE_SHIFT) & (page_size - 1))
	100	page_size >>= 1;
	101
	102	/*
	103	* Pin all pages we are about to map in memory. This is
	104	* important because we unmap and unpin in 4kb steps later.
	105	*/
	106	pfn = kvm_pin_pages(kvm, slot, gfn, page_size);
	107	if (is_error_pfn(pfn)) {
	108	gfn += 1;
62c476c7	109	continue;
fcd95807	110	}
62c476c7	111
fcd95807 JR	112	/* Map into IO address space */
	113	r = iommu_map(domain, gfn_to_gpa(gfn), pfn_to_hpa(pfn),
	114	get_order(page_size), flags);
e5fcfc82	115	if (r) {
260782bc	116	printk(KERN_ERR "kvm_iommu_map_address:"
5689cc53	117	"iommu failed to map pfn=%llx\n", pfn);
62c476c7 BAY	118	goto unmap_pages;
62c476c7 BAY	119	}
fcd95807 JR	120
	121	gfn += page_size >> PAGE_SHIFT;
	122
	123
62c476c7	124	}
fcd95807	125
62c476c7 BAY	126	return 0;
	127
	128	unmap_pages:
fcd95807	129	kvm_iommu_put_pages(kvm, slot->base_gfn, gfn);
62c476c7 BAY	130	return r;
	131	}
	132
	133	static int kvm_iommu_map_memslots(struct kvm *kvm)
	134	{
95c87e2b	135	int i, idx, r = 0;
46a26bf5	136	struct kvm_memslots *slots;
62c476c7	137
95c87e2b	138	idx = srcu_read_lock(&kvm->srcu);
90d83dc3	139	slots = kvm_memslots(kvm);
46a26bf5 MT	140
46a26bf5 MT	141	for (i = 0; i < slots->nmemslots; i++) {
3ad26d81	142	r = kvm_iommu_map_pages(kvm, &slots->memslots[i]);
62c476c7 BAY	143	if (r)
	144	break;
	145	}
95c87e2b	146	srcu_read_unlock(&kvm->srcu, idx);
682edb4c	147
62c476c7 BAY	148	return r;
	149	}
	150
260782bc WH	151	int kvm_assign_device(struct kvm *kvm,
260782bc WH	152	struct kvm_assigned_dev_kernel *assigned_dev)
62c476c7 BAY	153	{
62c476c7 BAY	154	struct pci_dev *pdev = NULL;
19de40a8	155	struct iommu_domain *domain = kvm->arch.iommu_domain;
522c68c4	156	int r, last_flags;
62c476c7	157
260782bc WH	158	/* check if iommu exists and in use */
	159	if (!domain)
	160	return 0;
	161
	162	pdev = assigned_dev->dev;
	163	if (pdev == NULL)
62c476c7	164	return -ENODEV;
260782bc	165
19de40a8	166	r = iommu_attach_device(domain, &pdev->dev);
260782bc	167	if (r) {
ab9f4ecb ZE	168	printk(KERN_ERR "assign device %x:%x:%x.%x failed",
ab9f4ecb ZE	169	pci_domain_nr(pdev->bus),
260782bc WH	170	pdev->bus->number,
	171	PCI_SLOT(pdev->devfn),
	172	PCI_FUNC(pdev->devfn));
	173	return r;
62c476c7 BAY	174	}
62c476c7 BAY	175
522c68c4 SY	176	last_flags = kvm->arch.iommu_flags;
	177	if (iommu_domain_has_cap(kvm->arch.iommu_domain,
	178	IOMMU_CAP_CACHE_COHERENCY))
	179	kvm->arch.iommu_flags \|= KVM_IOMMU_CACHE_COHERENCY;
	180
	181	/* Check if need to update IOMMU page table for guest memory */
	182	if ((last_flags ^ kvm->arch.iommu_flags) ==
	183	KVM_IOMMU_CACHE_COHERENCY) {
	184	kvm_iommu_unmap_memslots(kvm);
	185	r = kvm_iommu_map_memslots(kvm);
	186	if (r)
	187	goto out_unmap;
	188	}
	189
ab9f4ecb ZE	190	printk(KERN_DEBUG "assign device %x:%x:%x.%x\n",
ab9f4ecb ZE	191	assigned_dev->host_segnr,
260782bc WH	192	assigned_dev->host_busnr,
	193	PCI_SLOT(assigned_dev->host_devfn),
	194	PCI_FUNC(assigned_dev->host_devfn));
62c476c7	195
260782bc	196	return 0;
522c68c4 SY	197	out_unmap:
	198	kvm_iommu_unmap_memslots(kvm);
	199	return r;
260782bc	200	}
62c476c7	201
0a920356 WH	202	int kvm_deassign_device(struct kvm *kvm,
	203	struct kvm_assigned_dev_kernel *assigned_dev)
	204	{
19de40a8	205	struct iommu_domain *domain = kvm->arch.iommu_domain;
0a920356 WH	206	struct pci_dev *pdev = NULL;
	207
	208	/* check if iommu exists and in use */
	209	if (!domain)
	210	return 0;
	211
	212	pdev = assigned_dev->dev;
	213	if (pdev == NULL)
	214	return -ENODEV;
	215
19de40a8	216	iommu_detach_device(domain, &pdev->dev);
0a920356	217
ab9f4ecb ZE	218	printk(KERN_DEBUG "deassign device %x:%x:%x.%x\n",
ab9f4ecb ZE	219	assigned_dev->host_segnr,
0a920356 WH	220	assigned_dev->host_busnr,
	221	PCI_SLOT(assigned_dev->host_devfn),
	222	PCI_FUNC(assigned_dev->host_devfn));
	223
	224	return 0;
	225	}
	226
260782bc WH	227	int kvm_iommu_map_guest(struct kvm *kvm)
	228	{
	229	int r;
	230
19de40a8 JR	231	if (!iommu_found()) {
19de40a8 JR	232	printk(KERN_ERR "%s: iommu not found\n", __func__);
62c476c7 BAY	233	return -ENODEV;
	234	}
	235
19de40a8 JR	236	kvm->arch.iommu_domain = iommu_domain_alloc();
19de40a8 JR	237	if (!kvm->arch.iommu_domain)
260782bc	238	return -ENOMEM;
62c476c7	239
3f68b031 AW	240	if (!allow_unsafe_assigned_interrupts &&
	241	!iommu_domain_has_cap(kvm->arch.iommu_domain,
	242	IOMMU_CAP_INTR_REMAP)) {
	243	printk(KERN_WARNING "%s: No interrupt remapping support,"
	244	" disallowing device assignment."
	245	" Re-enble with \"allow_unsafe_assigned_interrupts=1\""
	246	" module option.\n", __func__);
	247	iommu_domain_free(kvm->arch.iommu_domain);
	248	kvm->arch.iommu_domain = NULL;
	249	return -EPERM;
	250	}
	251
62c476c7 BAY	252	r = kvm_iommu_map_memslots(kvm);
	253	if (r)
	254	goto out_unmap;
	255
62c476c7 BAY	256	return 0;
	257
	258	out_unmap:
	259	kvm_iommu_unmap_memslots(kvm);
	260	return r;
	261	}
	262
fcd95807 JR	263	static void kvm_unpin_pages(struct kvm *kvm, pfn_t pfn, unsigned long npages)
	264	{
	265	unsigned long i;
	266
	267	for (i = 0; i < npages; ++i)
	268	kvm_release_pfn_clean(pfn + i);
	269	}
	270
62c476c7	271	static void kvm_iommu_put_pages(struct kvm *kvm,
260782bc	272	gfn_t base_gfn, unsigned long npages)
62c476c7	273	{
fcd95807 JR	274	struct iommu_domain *domain;
fcd95807 JR	275	gfn_t end_gfn, gfn;
62c476c7	276	pfn_t pfn;
260782bc WH	277	u64 phys;
260782bc WH	278
fcd95807 JR	279	domain = kvm->arch.iommu_domain;
	280	end_gfn = base_gfn + npages;
	281	gfn = base_gfn;
	282
260782bc WH	283	/* check if iommu exists and in use */
	284	if (!domain)
	285	return;
62c476c7	286
fcd95807 JR	287	while (gfn < end_gfn) {
	288	unsigned long unmap_pages;
	289	int order;
	290
	291	/* Get physical address */
19de40a8	292	phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
fcd95807 JR	293	pfn = phys >> PAGE_SHIFT;
	294
	295	/* Unmap address from IO address space */
05b782ab	296	order = iommu_unmap(domain, gfn_to_gpa(gfn), 0);
fcd95807	297	unmap_pages = 1ULL << order;
260782bc	298
fcd95807 JR	299	/* Unpin all pages we just unmapped to not leak any memory */
	300	kvm_unpin_pages(kvm, pfn, unmap_pages);
	301
	302	gfn += unmap_pages;
	303	}
62c476c7 BAY	304	}
	305
	306	static int kvm_iommu_unmap_memslots(struct kvm *kvm)
	307	{
95c87e2b	308	int i, idx;
46a26bf5 MT	309	struct kvm_memslots *slots;
46a26bf5 MT	310
95c87e2b	311	idx = srcu_read_lock(&kvm->srcu);
90d83dc3	312	slots = kvm_memslots(kvm);
682edb4c	313
46a26bf5 MT	314	for (i = 0; i < slots->nmemslots; i++) {
	315	kvm_iommu_put_pages(kvm, slots->memslots[i].base_gfn,
	316	slots->memslots[i].npages);
62c476c7	317	}
95c87e2b	318	srcu_read_unlock(&kvm->srcu, idx);
62c476c7 BAY	319
	320	return 0;
	321	}
	322
	323	int kvm_iommu_unmap_guest(struct kvm *kvm)
	324	{
19de40a8	325	struct iommu_domain *domain = kvm->arch.iommu_domain;
62c476c7 BAY	326
	327	/* check if iommu exists and in use */
	328	if (!domain)
	329	return 0;
	330
62c476c7	331	kvm_iommu_unmap_memslots(kvm);
19de40a8	332	iommu_domain_free(domain);
62c476c7 BAY	333	return 0;
62c476c7 BAY	334	}