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Subject[PATCH 9/9] KVM: change KVM iommu.c to use IOMMU API
Date
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/include/asm/kvm_host.h | 3 +-
virt/kvm/iommu.c | 66 ++++++++++++++++++++-------------------
2 files changed, 36 insertions(+), 33 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index f58f7eb..77f4afa 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/mmu_notifier.h>
+#include <linux/iommu.h>

#include <linux/kvm.h>
#include <linux/kvm_para.h>
@@ -356,7 +357,7 @@ struct kvm_arch{
*/
struct list_head active_mmu_pages;
struct list_head assigned_dev_head;
- struct dmar_domain *intel_iommu_domain;
+ struct iommu_domain *iommu_domain;
struct kvm_pic *vpic;
struct kvm_ioapic *vioapic;
struct kvm_pit *vpit;
diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index a770874..48d1e5e 100644
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -16,15 +16,18 @@
*
* Copyright (C) 2006-2008 Intel Corporation
* Copyright IBM Corporation, 2008
+ * Copyright (C) 2008 Advanced Micro Devices, Inc.
* Author: Allen M. Kay <allen.m.kay@intel.com>
* Author: Weidong Han <weidong.han@intel.com>
* Author: Ben-Ami Yassour <benami@il.ibm.com>
+ * Author: Joerg Roedel <joerg.roedel@amd.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 kvm_iommu_unmap_memslots(struct kvm *kvm);
@@ -36,8 +39,9 @@ int kvm_iommu_map_pages(struct kvm *kvm,
{
gfn_t gfn = base_gfn;
pfn_t pfn;
+ phys_addr_t phys;
int i, r = 0;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;

/* check if iommu exists and in use */
if (!domain)
@@ -45,18 +49,16 @@ int kvm_iommu_map_pages(struct kvm *kvm,

for (i = 0; i < npages; i++) {
/* check if already mapped */
- pfn = (pfn_t)intel_iommu_iova_to_pfn(domain,
- gfn_to_gpa(gfn));
- if (pfn)
+ phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
+ if (phys)
continue;

pfn = gfn_to_pfn(kvm, gfn);
- r = intel_iommu_page_mapping(domain,
- gfn_to_gpa(gfn),
- pfn_to_hpa(pfn),
- PAGE_SIZE,
- DMA_PTE_READ |
- DMA_PTE_WRITE);
+ r = iommu_map_address(domain,
+ gfn_to_gpa(gfn),
+ pfn_to_hpa(pfn),
+ PAGE_SIZE,
+ DMA_PTE_READ | DMA_PTE_WRITE);
if (r) {
printk(KERN_ERR "kvm_iommu_map_pages:"
"iommu failed to map pfn=%lx\n", pfn);
@@ -92,12 +94,12 @@ int kvm_iommu_map_guest(struct kvm *kvm,
struct pci_dev *pdev = NULL;
int r;

- if (!intel_iommu_found()) {
- printk(KERN_ERR "%s: intel iommu not found\n", __func__);
+ if (!iommu_found()) {
+ printk(KERN_ERR "%s: No IOMMU found\n", __func__);
return -ENODEV;
}

- printk(KERN_DEBUG "VT-d direct map: host bdf = %x:%x:%x\n",
+ printk(KERN_DEBUG "KVM IOMMU direct map: host bdf = %x:%x:%x\n",
assigned_dev->host_busnr,
PCI_SLOT(assigned_dev->host_devfn),
PCI_FUNC(assigned_dev->host_devfn));
@@ -105,26 +107,24 @@ int kvm_iommu_map_guest(struct kvm *kvm,
pdev = assigned_dev->dev;

if (pdev == NULL) {
- if (kvm->arch.intel_iommu_domain) {
- intel_iommu_domain_exit(kvm->arch.intel_iommu_domain);
- kvm->arch.intel_iommu_domain = NULL;
+ if (kvm->arch.iommu_domain) {
+ iommu_domain_free(kvm->arch.iommu_domain);
+ kvm->arch.iommu_domain = NULL;
}
return -ENODEV;
}

- kvm->arch.intel_iommu_domain = intel_iommu_domain_alloc(pdev);
- if (!kvm->arch.intel_iommu_domain)
+ kvm->arch.iommu_domain = iommu_domain_alloc(&pdev->dev);
+ if (!kvm->arch.iommu_domain)
return -ENODEV;

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

- intel_iommu_detach_dev(kvm->arch.intel_iommu_domain,
- pdev->bus->number, pdev->devfn);
+ iommu_detach_device(kvm->arch.iommu_domain, &pdev->dev);

- r = intel_iommu_context_mapping(kvm->arch.intel_iommu_domain,
- pdev);
+ r = iommu_attach_device(kvm->arch.iommu_domain, &pdev->dev);
if (r) {
printk(KERN_ERR "Domain context map for %s failed",
pci_name(pdev));
@@ -138,16 +138,16 @@ out_unmap:
}

static void kvm_iommu_put_pages(struct kvm *kvm,
- gfn_t base_gfn, unsigned long npages)
+ gfn_t base_gfn, unsigned long npages)
{
gfn_t gfn = base_gfn;
pfn_t pfn;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
int i;

for (i = 0; i < npages; i++) {
- pfn = (pfn_t)intel_iommu_iova_to_pfn(domain,
- gfn_to_gpa(gfn));
+ pfn = (pfn_t)iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
+ pfn >>= PAGE_SHIFT;
kvm_release_pfn_clean(pfn);
gfn++;
}
@@ -169,23 +169,25 @@ static int kvm_iommu_unmap_memslots(struct kvm *kvm)
int kvm_iommu_unmap_guest(struct kvm *kvm)
{
struct kvm_assigned_dev_kernel *entry;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;

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

list_for_each_entry(entry, &kvm->arch.assigned_dev_head, list) {
- printk(KERN_DEBUG "VT-d unmap: host bdf = %x:%x:%x\n",
+ struct pci_dev *pdev = entry->dev;
+ printk(KERN_DEBUG "IOMMU unmap: host bdf = %x:%x:%x\n",
entry->host_busnr,
PCI_SLOT(entry->host_devfn),
PCI_FUNC(entry->host_devfn));

- /* detach kvm dmar domain */
- intel_iommu_detach_dev(domain, entry->host_busnr,
- entry->host_devfn);
+ /* detach kvm iommu domain */
+ iommu_detach_device(domain, &pdev->dev);
}
kvm_iommu_unmap_memslots(kvm);
- intel_iommu_domain_exit(domain);
+ iommu_domain_free(kvm->arch.iommu_domain);
+ kvm->arch.iommu_domain = NULL;
+
return 0;
}
--
1.5.6.4



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